Journal articles: 'Wimax structure'

1

Huang, Shanshan, Jun Li, and Jianzhong Zhao. "Miniaturized CPW-Fed Triband Antenna with Asymmetric Ring for WLAN/WiMAX Applications." Journal of Computer Networks and Communications 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/419642.

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A compact CPW-fed triband slot antenna for WLAN/WiMAX applications is proposed. The proposed antenna is formed by an asymmetric ring, an inverted L-strip, and a straight strip. By employing these structures, the antenna can generate three operation bands with compact size and simple structure. The measured and simulated results show the presented antenna has impedance bandwidths of 100 MHz (2.39–2.49 GHz), 360 MHz (3.36–3.72 GHz), and 760 MHz (5.13–5.89 GHz), which covers both WLAN in the 2.4/5.2 GHz bands and WiMAX in the 3.5/5.5 GHz bands. The antenna is successfully simulated and measured, showing triple bands can be obtained by using three different radiators and also indicating that the proposed antenna is suitable for the WiMAX/WLAN applications.

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Taha, Abd-Elhamid M., Pandeli Kolomitro, Hossam Hassanein, and Najah Abu Ali. "Evaluating frame structure design in WiMAX relay networks." Concurrency and Computation: Practice and Experience 25, no. 5 (2011): 608–25. http://dx.doi.org/10.1002/cpe.1803.

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Yang, Tang, Gao Wen, Gao Jinsong, and Feng Xiaoguo. "Compact multi-band printed antenna with multi-triangular ground plane for WLAN/WiMAX/RFID applications." International Journal of Microwave and Wireless Technologies 8, no. 2 (2014): 277–81. http://dx.doi.org/10.1017/s1759078714001482.

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In this paper a novel compact multi-band printed coplanar waveguide (CPW)-feed antenna for wireless local area network (WLAN)/WiMAX/RFID applications is proposed. The proposed antenna is composed of a multi-triangular structure as metal ground plane and the radiation element with four different branches, both of the structures are printed on the same side of a substrate and the antenna is fed by a CPW. By carefully tuning the locations and the sizes of these four branches, the antenna can yield three different resonating frequencies to cover the desired bands for WLAN/WiMAX/RFID applications. The simulated and measured results demonstrate that the proposed antenna has the impedance bandwidth (for return loss less than −10 dB) of 700 MHz (2.2−2.9 GHz), 540 MHz (3.16–3.7 GHz), and 850 MHz (5.05–5.9 GHz), respectively, which can cover the WLAN 2.4/5.8 GHz bands, the WiMAX 2.5/3.5 GHz bands, and the RFID 2.45/5.8 GHz bands.

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Osklang, Pracha, Chuwong Phongcharoenpanich, and Prayoot Akkaraekthalin. "Triband Compact Printed Antenna for 2.4/3.5/5 GHz WLAN/WiMAX Applications." International Journal of Antennas and Propagation 2019 (August 28, 2019): 1–13. http://dx.doi.org/10.1155/2019/8094908.

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This research presents a triband compact printed antenna for WLAN and WiMAX applications. The antenna structure consists of a folded open stub, long and short L-shaped strips, and asymmetric trapezoid ground plane. Besides, it is of simple structure and operable in 2.4 GHz and 5 GHz (5.2/5.8 GHz) WLAN and 3.5/5.5 GHz WiMAX bands. The folded open stub and long and short L-shaped strips realize impedance matching at 2.4, 3.5, 5.2, and 5.8 GHz, and the asymmetric trapezoid ground plane fine-tunes impedance matching at 5.2, 5.5, and 5.8 GHz. In addition, the equivalent circuit model consolidated into lumped elements is also presented to explain its impedance matching characteristics. In this study, simulations were carried out, and a prototype antenna was fabricated and experimented. The simulation and experimental results are in good agreement. Specifically, the simulated and experimental radiation patterns are omnidirectional at 2.4, 3.5, and 5.2 GHz and near-omnidirectional at 5.5 and 5.8 GHz. Furthermore, the simulated and measured antenna gains are 1.269–3.074 dBi and 1.10–2.80 dBi, respectively. Essentially, the triband compact printed antenna covers 2.4 GHz and 5 GHz (5.2/5.8 GHz) WLAN and 3.5/5.5 GHz WiMAX frequency bands and thereby is a good candidate for WLAN/WiMAX applications.

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Cho, HanGyu, Taeyoung Kim, Yu-Tao Hsieh, and Jong-Kae Fwu. "Physical layer structure of next generation mobile WiMAX technology." Computer Networks 55, no. 16 (2011): 3648–58. http://dx.doi.org/10.1016/j.comnet.2011.03.022.

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Edward, N., Z. Zakaria, and N. A. Shairi. "Reconfigurable Feeding Network with Dual-band Filter for WiMAX Application." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 5 (2017): 2411. http://dx.doi.org/10.11591/ijece.v7i5.pp2411-2419.

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<span lang="EN-US">Design and simulation for reconfigurable Wilkinson Power Divider (WPD) related to WiMAX application is proposed in this paper. This proposed design relates to dual band WiMAX frequencies at 2.5 GHz and 3.5 GHz. The main purpose of this design is to design a switchable feeding network that can cover the WiMAX standards by reconfiguring the microstrip line length using PIN diode switches. Besides, the power divider also can be design and develop as power combiner due to the passive component structure and hence reciprocal. In this proposed Wilkinson power divider, different band of frequencies for WiMAX application are obtained by using PIN diode. By turning ‘ON’ and ‘OFF’ the PIN diode, different frequencies are achieved between 2.5 and 3.5 GHz. This proposed design used Rogers RO4350 (er = 3.48, h = 0.508mm) as a substrate material and copper (thickness = 0.002 mm) related to patch of design. This simulation results showed that the S11 is less than -15dB; and S12 and S13 are better than -5dB. Based on these simulation results, the proposed WPD design using dual-band filter was well applied where it has better return loss (S11) with less than -15 dB for both WiMAX frequencies.</span>

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Wang, Zhi Ping. "The Application of WiMAX and Mesh Network Technology at Fire Communication." Applied Mechanics and Materials 192 (July 2012): 365–69. http://dx.doi.org/10.4028/www.scientific.net/amm.192.365.

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In order to solve the problem of communication on the site of disaster for fire fighting forces to implement their duties in the public domain, advanced WiMAX Mesh structure and characteristics are introduced, also Analysis the security solutions scheme of WiMAX and mesh networking technologies in the field of fire communication, satisfy the needs of data scheduling, fixed or mobile video surveillance, vehicle or personnel location ,emergency communications of mobile command vehicles and other business needs for site command.

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Malik, Jagannath, Parth C. Kalaria, and Machavaram V. Kartikeyan. "Complementary Sierpinski gasket fractal antenna for dual-band WiMAX/WLAN (3.5/5.8 GHz) applications." International Journal of Microwave and Wireless Technologies 5, no. 4 (2013): 499–505. http://dx.doi.org/10.1017/s1759078713000123.

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A proximity-fed complementary Sierpinski gasket fractal with equilateral triangular shape resonator in multilayer structure to achieve dual-band behavior for WiMAX and WLAN applications has been proposed. An electromagnetic coupled stacked structure of two different patches operating at two frequencies (3.5 GHz WiMAX and 5.8 GHz wireless LAN) has been designed for dual-band wireless applications. Proposed antenna was simulated using CST Microwave Studio based on the finite integration technique (FIT) with perfect boundary approximation (PBA). Finally, the proposed antenna was fabricated and some performance parameters were measured to validate against simulation results. The design procedures and employed tuning techniques to achieve the desired performance are presented.

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Zhai, Huiqing, Lu Liu, Zhihui Ma, and Changhong Liang. "A Printed Monopole Antenna for Triple-Band WLAN/WiMAX Applications." International Journal of Antennas and Propagation 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/254268.

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A new compact design of monopole antenna for triple-band WLAN/WiMAX applications with two band-notches based on broadband antenna is presented. By introducing a stub loaded ground and two new paper clip structures etched on radiation patch, a compact overall dimension 31 mm×33 mm×1 mm and three separated operating bands effectively covering 2.4/5.2/5.8 GHz WLAN bands and 2.5/3.5/5.5 GHz WiMAX bands can be achieved. Compared with familiar U type slot, the introduced compact paper clip structure can save about 37% of dimension regions, which could effectively improve efficiency of band-notch formation. Simulated and measured results demonstrate that the proposed antenna has good dipole-like radiation characteristics with appreciable gain across the operating bands. Besides, main parameters of the two etched paper clip structures are investigated to control the positions and bandwidths of the two stop-bands, respectively, on basis of which the three working bands can be adjusted independently.

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Azman, Nuradlina, Mohd Fairus Mohd Yusoff, and Muhammad Akram Mohd Sobri. "Dual-band Metamaterial Filtenna for WiMAX Application." ELEKTRIKA- Journal of Electrical Engineering 18, no. 1 (2019): 47–50. http://dx.doi.org/10.11113/elektrika.v18n1.106.

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Filter and antenna are the most important components in transmission and receiving signal in wireless communication system. The combination of a filter and antenna was known as filtenna. In this paper, a metamaterial band-stop filter is combine with a multiband antenna to produce a dual-band metamaterial filtenna. The purpose of combining both components in one structure is to have a compact size with low transmission line losses. On the other hand, by implementing the metamaterial structure in the filter design, it has increases the overall filtenna performances. All the filtenna designs are been simulated using CST Microwave Studio software. The performances of the dual-band metamaterial filtenna are then analysed based on the S-parameter response and radiation patterns. The simulation results show that the filtenna has operates at 3.6GHz and 5.2GHz, which is mostly suitable for WiMAX application.

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Singla, Geetanjali, and Rajesh Khanna. "Double-ring multiband microstrip patch antenna with parasitic strip structure for heterogeneous wireless communication systems." International Journal of Microwave and Wireless Technologies 9, no. 8 (2017): 1757–62. http://dx.doi.org/10.1017/s1759078717000502.

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In this paper, a novel design of compact Coplanar Waveguide-fed planar monopole antenna with enhanced bandwidth and multiband characteristics has been proposed. Two rectangular rings have been incorporated in a rectangular patch to obtain multiband operation for Wireless Local Area Network (WLAN) (2.4/5.2/5.8 GHz) and Worldwide Interoperability for Microwave Access (WiMAX) (2.3/2.5/5.5 GHz) bands. A parasitic strip and meandering along with double-ringed structure have been used to achieve enhanced impedance bandwidth in WLAN (from 2.26 to 3.03 GHz) and WiMAX (from 4.48 to 6.85 GHz) bands. The parametric analysis is carried out to study effect of varying dimensions on antenna performance. The proposed antenna is optimized and prototype is designed and fabricated. Simulated and measured radiation patterns in elevation and azimuthal planes are also observed. The antenna shows significant gain of 7.33 dBi at 6.54 GHz frequency.

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12

F, E. Ismael, K. Syed Yusof S, Abbas M, Fisal N, and Muazzah N. "Frame structure for Mobile multi-hop relay (MMR) WiMAX networks." International Journal of Physical Sciences 8, no. 17 (2013): 776–92. http://dx.doi.org/10.5897/ijps12.275.

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13

Hajj, M., R. Chantalat, E. Rodes, E. Arnaud, T. Monédière, and B. Jecko. "Bipolar M-EBG structure for WIMAX base station sectoral antennas." Electronics Letters 46, no. 5 (2010): 319. http://dx.doi.org/10.1049/el.2010.3159.

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Aboud kadhim, Mohammed, and Widad Ismail. "Implementation of WiMAX (IEEE802.16.d) OFDM Baseband Transceiver-Based Multiwavelet OFDM on a Multi-Core Software-Defined Radio Platform." ISRN Signal Processing 2011 (April 14, 2011): 1–9. http://dx.doi.org/10.5402/2011/750878.

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This paper investigates a new approach to the adaptation of the WiMAX IEEE802.16d baseband, the physical layer performance of wireless communications systems based on OFDM multiwavelet transform, using half values of coding rates, 16-QAM, and DMWT-OFDM by being applied to the SFF SDR development platform. In the new structure of WiMAX IEEE802.16d baseband, is reduce further the level of interference, and spectral efficiency is increased. The proposed design was model tested, and its performance was found to comply with International Telecommunications Union channel (ITU) models that have been elected for the wireless channel in the simulation process. The simulation approved the proposed design which achieved much lower bit error rates, increased signal-to-noise power ratio (SNR), robustness for multipath channels and does not require cyclically prefixed guard interval and have higher spectral efficiency than OFDM based on DWT and FFT also can be used as an alternative conventional OFDM in WiMAX IEEE802.16d baseband.

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N, Rakesh. "Design of Wideband Antenna Array for WiMax Application." International Journal for Research in Applied Science and Engineering Technology 9, no. 8 (2021): 958–62. http://dx.doi.org/10.22214/ijraset.2021.37332.

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Abstract: The evolution of wireless communication system has led path for innovative antenna design specifically in wideband antenna for WiMax application. In this paper design and simulation of microstrip wideband circular patch antenna array operating between 2GHz to 4Ghz is presented. The circular patch antenna is designed to operate at 3GHz line feed and the ground is itched to achieve required wideband characteristics. The simulation is carried out in EM Flow solver, High Frequency Structure Simulator software. For a single patch antenna, the return loss, lesser than -10dB throughout the bandwidth. Later an antenna array is operating between 2GHz to 4GHz frequency is designed and simulated. The return loss is lesser than -12dBi throughout the band and a peak gain is 14.7dBi. Keywords: Microstrip Patch Antenna (MPA), High Frequency Structure Simulator (HFSS).

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Kunwar, Alaknanda, Anil Kumar Gautam, and Binod Kumar Kanaujia. "Inverted L-slot triple-band antenna with defected ground structure for WLAN and WiMAX applications." International Journal of Microwave and Wireless Technologies 9, no. 1 (2015): 191–96. http://dx.doi.org/10.1017/s1759078715001105.

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To incorporate two different communication standards in a single device, a compact triple-band antenna is proposed in this paper. The proposed antenna is formed by etching an inverted L-shaped slot on the patch with defected ground structure. The antenna is targeted to excite three separate bands first from 2.39–2.51, second from 3.15–3.91, and third from 4.91–6.08 GHz that covers entire Wireless Local Area Network (WLAN) (2.4/5.2/5.8 GHz) and Worldwide Interoperability for Microwave Access (WiMAX) (2.5/3.5/5.5) bands. Thus, the proposed antenna provides feasibility to integrate WLAN and WiMAX communication standards in a single device with good radiation pattern quality. Furthermore, a prototype of the proposed antenna fabricated and measured to validate the design, shows a good agreement between simulated and measured results. The simulation and measurement results show that the designed antenna is capable of operating over the 2.39–2.51 GHz, 3.15–3.91 GHz, and 4.91–6.08 GHz frequency bands while rejecting frequency ranges between these three bands. The proposed antenna offers a compact size of 20 × 30 mm2 as compared with earlier reported papers.

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Behera, S. B., D. Barad, and S. Behera. "A Triple-band Suspended Microstrip Antenna with Symmetrical USlots for WLAN/WiMax Applications." Advanced Electromagnetics 7, no. 2 (2018): 41–47. http://dx.doi.org/10.7716/aem.v7i2.608.

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In this study, a triple-band suspended microstrip antenna with symmetrical U-slots is proposed for modern wireless communication systems. The antenna is specifically designed to acquire application in WLAN and WiMAX communication. Symmetrical U-slots in the radiator patch increase the number of resonances and improve the gain response. An appropriate air height was maintained between the ground plane and the radiator patch layer for improving bandwidth operation. The impedance characteristics of the antenna are enhanced using probe feeding techniques. The proposed compact antenna is designed on a single dielectric substrate of (30×25×1.56) mm3 . Parametric analysis of the proposed structure has been realized using IE3D software. This prototype exhibits maximum impedance bandwidth of 750 MHz and gain response of 7.28 dBi. The performance of the structure at three resonating bands i.e., at 3.3 GHz, 3.78 GHz and 5.3 GHz facilitate it to be applicable for WLAN/WiMAX systems.

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Sanjeeva Reddy, B. R., Naresh K. Darimireddy, Chan-Wang Park, and Abdellah Chehri. "Performance of Reconfigurable Antenna Fabricated on Flexible and Nonflexible Materials for Band Switching Applications." Energies 14, no. 9 (2021): 2553. http://dx.doi.org/10.3390/en14092553.

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In this article, a novel frequency slot-based switchable antenna fabricated on flexible and nonflexible materials is presented for suitable reconfigurable radiations of Bluetooth, WiMAX, and upper WLAN applications. Initially, the performance of this structure was simulated using a CSTTM simulator and evaluated experimentally using a nonflexible FR4 structure. The same antenna was implemented on a flexible (jean) substrate with a relative permittivity of 1.7. The proposed textile antenna prototypes were fabricated by optimal dimensions of an E-shaped slot with a variation on the shape of the ground layer, integrated using a crossed T-shaped strip with ON/OFF switchable state operations. The proposed antenna prototype is compact (20 × 20 mm2), providing switchable radiations with tri bands, has frequencies ranged at 2.36–2.5 GHz for Bluetooth, 3.51–3.79 GHz and 5.47–5.98 GHz for the distinct bands of WiMAX and WLAN, respectively, as well as part of UWB operations.

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Kaur, Jaswinder, Rajesh Khanna, and Machavaram Kartikeyan. "Novel dual-band multistrip monopole antenna with defected ground structure for WLAN/IMT/BLUETOOTH/WIMAX applications." International Journal of Microwave and Wireless Technologies 6, no. 1 (2013): 93–100. http://dx.doi.org/10.1017/s1759078713000858.

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In the present work, a novel multistrip monopole antenna fed by a cross-shaped stripline comprising one vertical and two horizontal strips has been proposed for wireless local area network (WLAN)/Industrial, Scientific, and Medical band (ISM)/International Mobile Telecommunication (IMT)/BLUETOOTH/Worldwide Interoperability for Microwave Access (WiMAX) applications. The designed antenna has a small overall size of 20 × 30 mm2. The goal of this paper is to use defected ground structure (DGS) in the proposed antenna design to achieve dual-band operation with appreciable impedance bandwidth at the two operating modes satisfying several communication standards simultaneously. The antenna was simulated using Computer Simulation Technology Microwave Studio (CST MWS) V9 based on the finite integration technique (FIT) with perfect boundary approximation. Finally, the proposed antenna was fabricated and some performance parameters were measured to validate against simulation results. The design procedure, parametric analysis, simulation results along with measurements for this multistrip monopole antenna using DGS operating simultaneously at WLAN (2.4/5.8 GHz), IMT (2.35 GHz), BLUETOOTH (2.45 GHz), and WiMAX (5.5 GHz) are presented.

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Jung, Young-Bae, and Soon-Young Eom. "A Compact MultiBand and Dual-Polarized Mobile Base-Station Antenna Using Optimal Array Structure." International Journal of Antennas and Propagation 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/178245.

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This paper introduces a multiband base-station antenna to provide multiple communications services. There is growing need for multiband base-station antennas for mobile communications to serve existing 2nd and 3rd generation systems and to provide emerging 4th generation communication service as well as WiFi. For example, cellular, PCS, and especially WCDMA service are currently widely used in Korea, and 4th generation service (WiBro and LTE), introduced in 2011, will have to operate in parallel with existing services. The proposed multiband base-station antenna can provide a single/dual/triple or more multiple services using dual-polarization (±45° linear polarizations) according to the requirements of the service provider. This antenna has a shared aperture, having several array antenna sets for multiple services (Band 1: cellular service in 0.824~0.894 GHz, Band 2: PCS, WCDMA, and WiFi in 1.920~2.170 GHz, Band 3: WiBro and WiMAX in 2.300~2.400 GHz, and Band 4: WiMAX in 5.150~5.850 GHz). This antenna can be helpful for reducing base-station operating expenses and to create a clean urban landscape by minimizing the number of base-station antennas, which are increasing rapidly.

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Hao, Hong Gang, Wen Shuai Hu, Hai Yan Tian, and Yi Ren. "A Dual-Band LTCC Antenna with Cross Circuitous Structure." Advanced Materials Research 601 (December 2012): 163–67. http://dx.doi.org/10.4028/www.scientific.net/amr.601.163.

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A compact dual-band antenna for ISM (2.45GHz) or WiMAX (3.15GHz) applications by low-temperature co-fired ceramic (LTCC) technology is presented in this paper. The proposed antenna is composed of multi-layer structures to reduce the sizes effectively. The simulated results show that the dimensions of the antenna are 11×4.2×1.2mm3, with the 2:1 VSWR impedance bandwidth definition, the lower and upper band have the bandwidth of 80 and 90 MHz. The novel antenna has realized miniaturization and omni-directional radiation patterns across the whole operating frequency band.

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Sivabalan, A., G. Keerthi Vijayadhasan, T. Thandapani, and R. Balamurali. "Design of Frequency Reconfigurable Multiband Compact Antenna." Journal of Computational and Theoretical Nanoscience 17, no. 8 (2020): 3671–75. http://dx.doi.org/10.1166/jctn.2020.9256.

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This paper describes about the designing of a reconfigurable antenna which operates at different frequencies fulfilling the requirement of 1 to 10 GHz WLAN and 3.5 GHz WIMAX antenna applications. The main objective of this research is to minimize the usage of Antennas used in mobile phones for various applications covering 1G, 2G, 3G, 4G, Wi-Fi and Bluetooth. This reconfigurable multiband antenna is used for applications such as WiMAX/WLAN and it has 2 PIN diode switches. The proposed antenna has been analyzed using ADS (Agilent advanced design system) software and fabricated on an FR-4 substrate. The proposed model has a compact structure with an area of about 50 x 45 mm2, and has a slotted ground substrate.

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V.Prashanth, K., Bonthu Umamaheswari, G. Akhil, G. Vamsi krishna, and M. Venkata Sai chandu. "A Compact Antenna with WiMAX and WLAN bands notched for UWB applications." International Journal of Engineering & Technology 7, no. 2.7 (2018): 489. http://dx.doi.org/10.14419/ijet.v7i2.7.10869.

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A Compact antenna with WiMAX and WLAN bands notched for ultra wide band (UWB) applications is proposed. The proposed antenna is designed for the planar ultra wide band (UWB) antenna and ultra wide band (UWB) antenna having two band rejections. The proposed antenna overall size is 30mm x 40mm x 1.6mm. The antenna consists of a rectangular patch on the top of FR4 substrate with 50ohm feed with defected ground structure. This patch consists of one round cut at each corner having radius 1.575mm. The simulated band width with return loss (RL) >=10db is 3.1 to 11.2 GHz with VSWR<2. It works for the applications of WiMAX system at 3.5GHz (3.3 – 3.7 GHz), C-band satellite communication (3.7 - 4.2 GHz), wireless local area network (WLAN) system at 5GHz (5.15 – 5.825 GHz), X-band satellite communication system (7.25 - 7.75 GHz). The ultra wide band frequency range for these wireless systems causes interference. To diminish obstruction, the band rejection is made. WiMAX and WLAN groups are dismissed by designing slots on the patch. This antenna has an incredible pick up in the Gain while a sharp drop in the rejected groups.

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Mabrok, Mussa, Zahriladha Zakaria, Yully Erwanti Masrukin, Tole Sutikno, and Hussein Alsariera. "Effect of the defected microstrip structure shapes on the performance of dual-band bandpass filter for wireless communications." Bulletin of Electrical Engineering and Informatics 10, no. 1 (2021): 232–40. http://dx.doi.org/10.11591/eei.v10i1.2662.

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Due to the progression growth of multiservice wireless communication systems in a single device, multiband bandpass filter has attract a great attention to the end user. Therefore, multiband bandpass filter is a crucial component in the multiband transceivers systems which can support multiple services in one device. This paper presents a design of dual-band bandpass filter at 2.4 GHz and 3.5 GHz for WLAN and WiMAX applications. Firstly, the wideband bandpass filter is designed at a center frequency of 3 GHz based on quarter-wavelength short circuited stub. Three types of defected microstrip structure (DMS) are implemented to produce a wide notch band, which are T-inversed shape, C-shape, and U- Shape. Based on the performance comparisons, U-shaped DMS is selected to be integrated with the bandpass filter. The designed filter achieved two passbands centered at 2.51 GHz and 3.59 GHz with 3 dB bandwidth of 15.94 % and 15.86 %. The proposed design is very useful for wireless communication systems and its applications such as WLAN and WiMAX

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Aqeel, Sajid, M. R. Kamarudin, Aftab Ahmad Khan, et al. "A Compact Frequency Reconfigurable Hybrid DRA for LTE/Wimax Applications." International Journal of Antennas and Propagation 2017 (2017): 1–13. http://dx.doi.org/10.1155/2017/3607195.

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A compact hybrid antenna structure with frequency reconfiguration capabilities is presented in this article. The proposed design employs a combination of a rectangular DR element and a coupling slot on the structure’s ground plane (GP). The slot shifts the fundamental DRA mode by introducing a slow wave effect and its resonant behavior helps to achieve an omnidirectional pattern at low frequencies. The slot is loaded with a series of PIN diode switches whose ON/OFF combinations alter the effective slot length. Slot loading with PIN diodes results in frequency reconfiguration of the proposed structure with a large tuning range of 76.2% (between 1.73 and 3.86 GHz). A parametric analysis was performed to investigate the effects of slot length, width, and position on the reflection coefficients of the proposed structure. A prototype of the proposed design was fabricated and results were measured. The measured results show a close agreement with the simulated ones. The proposed design is suitable for DCS 1800 MHz, PCS 1900 MHZ, UMTS, LTE 2500–2700 MHz, and Wimax 3.5 GHz.

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Li, Bing, and Jing-song Hong. "Design of Two Novel Dual Band-Notched UWB Antennas." International Journal of Antennas and Propagation 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/303264.

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Two novel dual band-notched ultra-wideband (UWB) printed monopole antennas with simple structure and small size are presented. The size of both antennas is25×25×0.8 mm3. The bandwidth of one of the proposed antenna can be from 2.7 GHz to 36.8 GHz, except the bandwidth of 3.2–3.9 GHz for WiMAX applications and 5.14–5.94 GHz for WLAN applications. The bandwidth of the other is ranging for 2.7 to 41.1 GHz, except the bandwidth of 3.2–3.9 GHz for WiMAX applications and 4.8–5.9 GHz for WLAN applications. Bandwidths of the antennas are about 512% and 455% wider than those of conventional band-notched UWB antennas, respectively. In addition, the time-domain characteristics of the two antennas are investigated to show the difference between both antennas.

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KIM, Jongwoo, Suwon PARK, Seung Hyong RHEE, Yong-Hoon CHOI, Ho Young HWANG, and Young-uk CHUNG. "Coexistence of WiFi and WiMAX Systems Based on Coexistence Zone within WiMAX Frame Structure and Modified Power Saving Mode of WiFi System." IEICE Transactions on Communications E94-B, no. 6 (2011): 1781–84. http://dx.doi.org/10.1587/transcom.e94.b.1781.

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Jayaprakasan, V., S. Vijayakumar, and Pandya Vyomal Naishadhkumar. "Design of CIC based decimation filter structure using FPGA for WiMAX applications." IEICE Electronics Express 16, no. 7 (2019): 20190074. http://dx.doi.org/10.1587/elex.16.20190074.

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Ibrahim, Amirudin, Nur Arina Fazil, and Raimi Dewan. "Triple-band antenna with defected ground structure (DGS) for WLAN/WiMAX applications." Journal of Physics: Conference Series 1432 (January 2020): 012071. http://dx.doi.org/10.1088/1742-6596/1432/1/012071.

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Nabaoui, Driss El, Abdelali Tajmouati, Jamal Zbitou, Ahmed Errkik, Larbi Elabdellaoui, and Mohamed Latrach. "A Novel Low Cost Fractal Antenna Structure for ISM and WiMAX Applications." TELKOMNIKA (Telecommunication Computing Electronics and Control) 16, no. 5 (2018): 1901. http://dx.doi.org/10.12928/telkomnika.v16i5.8527.

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Wang, Tuo, Ying-Zeng Yin, Jian Yang, Yong-Li Zhang, and Jiao-Jiao Xie. "COMPACT TRIPLE-BAND ANTENNA USING DEFECTED GROUND STRUCTURE FOR WLAN/WIMAX APPLICATIONS." Progress In Electromagnetics Research Letters 35 (2012): 155–64. http://dx.doi.org/10.2528/pierl12082814.

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32

Murmu, Lakhindar, Santasri Koley, Amit Bage, and Sushrut Das. "A Simple WiMAX and RFID Band-Notched UWB Bandpass Filter and Its Susceptibility Study." Journal of Circuits, Systems and Computers 28, no. 11 (2019): 1950196. http://dx.doi.org/10.1142/s0218126619501962.

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An ultra-wideband (UWB) bandpass filter (BPF) with a fractional bandwidth (FBW) of about 110%, transmission zero at the high-frequency edge, and band notches at the worldwide interoperability for microwave access (WiMAX) and radio frequency identification (RFID) band is presented in this paper. The filter is based on single short-circuited stub, U-shaped defected ground structure (DGS) array, two U-shaped resonators and two stepped impedance resonators (SIRs). The filter is compact and exhibits a selective filtering characteristic equivalent to a three-pole Chebyshev filter. The design procedure has been described and verified by full-wave electromagnetic (EM) simulation and measurement. The proposed filter has low insertion loss, sharp rejection, and excellent in and out band performance. Due to its applications in WiMAX and RFID systems, the filter may be subjected to high EM radiation from the antenna and nearby sources. Therefore, susceptibility study of such a filter is very important. Hence, the susceptibility study of the band-notched UWB BPF has been carried out by subjecting the structure to an interference source.

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33

David, Rajiv Mohan, Mohammad Saadh AW, Tanweer Ali, and Pradeep Kumar. "A Multiband Antenna Stacked with Novel Metamaterial SCSRR and CSSRR for WiMAX/WLAN Applications." Micromachines 12, no. 2 (2021): 113. http://dx.doi.org/10.3390/mi12020113.

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This paper presents an innovative method for the design of a triple band meta-mode antenna. This unique design of antenna finds application in a particular frequency band of WLAN and WiMAX. This antenna comprises of a square complimentary split ring resonator (SCSRR), a coaxial feed, and two symmetrical comb shaped split ring resonators (CSSRR). The metamaterial unit cell SCSRR independently gains control in the band range 3.15–3.25 GHz (WiMAX), whereas two symmetrical CSSRR unit cell controls the band in the ranges 3.91–4.01 GHz and 5.79–5.94 GHz (WLAN). This design methodology and the study of the suggested unit cells structure are reviewed in classical waveguide medium theory. The antenna has a miniaturized size of only 0.213λ0 × 0.192λ0 × 0.0271λ0 (20 × 18 × 2.54 mm3, where λ0 is the free space wavelength at 3.2 GHz). The detailed dimension analysis of the proposed antenna and its radiation efficiency are also presented in this paper. All the necessary simulations are carried out in High Frequency Structure Simulator (HFSS) 13.0 tool.

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Xia, Hui. "Research on Delay in Wireless Muti-Hop Heterogeneous Body Area Networks." Applied Mechanics and Materials 644-650 (September 2014): 2715–18. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.2715.

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Due to life threatening situations, timely sending of data is essential. In this study transmission delay of different paths, through which data is sent from sensor to health care center over heterogeneous multi-hop wireless channel is analyzed. Data of medical related diseases is sent through three different paths. In all three paths, data from sensors first reaches ZigBee, which is the common link in all three paths. Wireless Local Area Network (WLAN), Worldwide Interoperability for Microwave Access (WiMAX), Universal Mobile Telecommunication System (UMTS) are connected with ZigBee. Each network (WLAN, WiMAX, UMTS) is setup according to environmental conditions, suitability of device and availability of structure for that device. Delay of data reaching each device is calculated and represented graphically. Main aim of this study is to calculate delay of each link in each path over multi-hop wireless channel.

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35

Chen, Zubin, Baijun Lu, Yanzhou Zhu, and Hao Lv. "A Compact Printed Monopole Antenna for WiMAX/WLAN and UWB Applications." Future Internet 10, no. 12 (2018): 122. http://dx.doi.org/10.3390/fi10120122.

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In this paper, a printed monopole antenna design for WiMAX/WLAN applications in cable-free self-positioning seismograph nodes is proposed. Great improvements were achieved in miniaturizing the antenna and in widening the narrow bandwidth of the high-frequency band. The antenna was fed by a microstrip gradient line and consisted of a triangle, an inverted-F shape, and an M-shaped structure, which was rotated 90° counterclockwise to form a surface-radiating patch. This structure effectively widened the operating bandwidth of the antenna. Excitation led to the generation of two impedance bands of 2.39–2.49 and 4.26–7.99 GHz for a voltage standing wave ratio of less than 2. The two impedance bandwidths were 100 MHz, i.e., 4.08% relative to the center frequency of 2.45 GHz, and 3730 MHz, i.e., 64.31% relative to the center frequency of 5.80 GHz, covering the WiMAX high-frequency band (5.25–5.85 GHz) and the WLAN band (2.4/5.2/5.8). This article describes the design details of the antenna and presents the results of both simulations and experiments that show good agreement. The proposed antenna meets the field-work requirements of cable-less seismograph nodes.

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Samsuzzaman, M., T. Islam, N. H. Abd Rahman, M. R. I. Faruque, and J. S. Mandeep. "Compact Modified Swastika Shape Patch Antenna for WLAN/WiMAX Applications." International Journal of Antennas and Propagation 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/825697.

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A compact simple structure modified Swastika shape multiband patch antenna is designed and investigated. The antenna, which occupies an overall dimension of 0.305λ × 0.305λ × 0.012λat lower frequency, has a simple structure which comprises of a planar wide square slot in the ground with four slits and Swastika shape radiation patch with a rectangular slot. The proposed Swastika shape antenna was designed and analyzed by using a finite element method based high frequency structural simulator HFSS. The experimental and numerical results exhibit that the antenna operates over the frequency ranges 950 MHz (2.28–3.23 GHz), 660 MHz (3.28–3.94 GHz), and 1120 MHz (5.05–6.17 GHz) suitable for WLAN (2.4/5.2/5.8 GHz) and WiMAX 2.5/3.5/5.5 GHz applications. It has a good omnidirectional radiation pattern and reaches 3.97 dBi at 2.44 GHz, 4.04 dBi at 3.5 GHz, and 3.25 dBi at the band of 5.98 GHz. A prototype is fabricated and then measured. The experimental and simulation results show good impedance bandwidth, radiation pattern, and stable gain across the operating bands.

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Al-Moliki, Yahya Mohammed Hameed, Kamarul Ariffin Bin Noordin, MHD Nour Hindia, and Mohd Fadzli Bin Mohd Salleh. "Concatenated RS-Convolutional Codes for Cooperative Wireless Communication." Open Electrical & Electronic Engineering Journal 7, no. 1 (2013): 9–20. http://dx.doi.org/10.2174/1874129001307010009.

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In the last few years, several works have investigated the performance of cooperative wireless systems with various types of channel codes such as Low Density Parity Check (LDPC), Turbo, CRC, convolutional and recently Reed Solomon (RS) codes. These cooperative schemes give power to single antenna mobiles to originate virtual multiple antennas transmitter, MIMO system, by sharing their antennas so that diversity gain is achieved. The most common cooperative schemes are decode and forward (DF) and coded cooperation (CC). Concatenated Reed Solomon and convolutional codes have been used by several wireless communication standards like digital video broadcasting (DVB) standards and IEEE 802.16e WiMAX standard. In this paper, we develop two different coded cooperation schemes and apply them to the mandatory structure of physical layer specifications of IEEE 802.16e WiMAX. The results attained for both coded cooperation schemes present magnificent diversity gains over non-cooperative scheme.

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38

Li, Si, Atef Elsherbeni, Zhenfeng Ding, and Yunlong Mao. "A Metamaterial Inspired Compact Miniaturized Triple-band Near Field Resonant Parasitic Antenna for WLAN/WiMAX Applications." Applied Computational Electromagnetics Society 35, no. 12 (2021): 1539–47. http://dx.doi.org/10.47037/2020.aces.j.351213.

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This paper presents a metamaterial-inspired triple-band antenna specified for WLAN and WiMAX applications with a compact size of 24mm × 18mm × 1mm (at 2.4 GHz). It consists of a dual-band left-handed metamaterial (LHM) unit surrounded by a G-style monopole antenna. The LHM is first designed and analyzed with equivalent circuits and simulations. A loop antenna based on the LHM unit is designed and simulated to investigate the radiating performance of the LHM unit structure. We also ran simulations for the G-style monopole. Later, the LHM unit is employed as a near-field resonant parasitic (NFRP) element that surrounded by the G-style monopole. A prototype of this antenna is fabricated. Simulations and measurements were carried out and the results match well, identifying good omni-directional radiating performance. Radiation comparisons with the loop antenna and the G-style monopole indicate that due to NFRP, the G-style monopole’s pass bands are shifted to lower frequencies to satisfy 2.45 GHz and 5.5 GHz bands requirements, meanwhile the LHM unit structure operates a third pass band of 3.5 GHz. The compact size and good radiation properties of the antenna render it suitable for WLAN/WiMAX applications.

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39

Nouri, H., J. Nourinia, and Ch Ghobadi. "Multiband printed dipole antenna with log-periodic toothed structure for WLAN/WiMAX applications." Microwave and Optical Technology Letters 53, no. 3 (2011): 536–39. http://dx.doi.org/10.1002/mop.25790.

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40

Sachan, Ritesh, and D. C. Dhubkarya. "Photonic band gap structure microstrip patch antenna for WiMAX and Wi-Fi application." Photonic Network Communications 41, no. 3 (2021): 280–86. http://dx.doi.org/10.1007/s11107-021-00938-8.

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41

Jabire, Adamu Halilu, Anas Abdu, Sani Saminu, Abubakar Muhammad Sadiq, and Mohammed Jajere Adamu. "Isolation Frequency Switchable MIMO Antenna for PCS, WIMAX and WLAN Application." ELEKTRIKA- Journal of Electrical Engineering 18, no. 3 (2019): 27–33. http://dx.doi.org/10.11113/elektrika.v18n3.178.

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In this study, a lumped component based frequency reconfigurable multiple-input-multiple-output (MIMO) receiving wire design is presented. The proposed antenna is composed of a planar structure in form of F-shaped together with a slotted and defected ground structure for bandwidth and isolation enhancement. The MIMO antenna operates in six frequencies upon the state of the four lumped element switches. The proposed receiving wire design exhibits a multiband frequency reconfigurable characteristics from 1-7GHz with isolation of more than 14dB for the whole band, with efficiency of about 75%. The MIMO antenna’s behavior in terms of ratio of square root of the sum of power reflected wave to the incident wave (TARC), ECC and CCL are all within the acceptable limits. The design is suitable for personal communication system (PCS), WIMAX and WLAN wireless applications.

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42

Sahoo, Amiya Bhusana, Guru Prasad Mishra, and Biswa B. Mangaraj. "Optimal Design of Compact Dual-Band Slot Antenna Using Particle Swarm Optimization for WLAN and WiMAX Applications." Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) 12, no. 5 (2019): 425–31. http://dx.doi.org/10.2174/2352096511666180706130127.

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Background: A novel, small size, dual-band rectangular patch antenna with two narrow vertical slots for Wireless Local Area Network (WLAN) and Worldwide Interoperability for Microwave Access (WiMAX) application is presented here. Methods: The proposed antenna, fed by coaxial line, has dimensions of 21.075 mm ×17 mm ×1. 6 mm. With a pair of vertical slots, the antenna is resonating in 3.5 GHz WiMAX and 5.3 GHz WLAN band. The dimensions of the ground plane, substrate, radiating patch and two slots on the patch antenna are optimized using Particle Swarm Optimization (PSO) to obtain the desired operating frequency band. Results: The proposed antenna shows good radiation characteristics at these two operating bands, making it suitable for dual-band operation. Conclusion: The same design with some different physical parameter may be suitable for other kinds of wireless services. Further, application of Defected Ground Structure (DGS) to such models may also provide better performance.

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43

Devi, Meenakshi, Anil Kumar Gautam, and Binod Kumar Kanaujia. "A compact ultra wideband antenna with triple band-notch characteristics." International Journal of Microwave and Wireless Technologies 8, no. 7 (2015): 1069–75. http://dx.doi.org/10.1017/s1759078715000409.

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A novel design of a compact ultra wideband antenna with triple band-notched characteristics is proposed. Much wider impedance bandwidth (from 2.63 to 13.02 GHz) is obtained by using a star like-shaped radiator and a defected rectangular ground plane and band-notched functions are obtained by attaching L- and I-shaped structure on the ground and a capacitive-loaded loop (CLL) resonator on the patch. The triple band-notch rejection at WiMAX, WLAN, and ITU bands are obtained by attaching I-shape strip, CLL resonator, and flip L-shape, respectively. The parametric study is carried out to study the influence of varying dimensions on the antenna performance. To validate simulation results of the design a prototype is fabricated on the commercially available FR4 material. The measured results reveal that the presented triple band-notch antenna offers a very wide bandwidth of 10.41 GHz (2.63–13.04 GHz) with triple band-notched characteristics at WiMAX (2.94–3.7 GHz), WLAN (5.1–5.9 GHz), and ITU (7.4–8.7 GHz).

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44

Sharma, Manish, Yogendra Kumar Awasthi, and Himanshu Singh. "Planar high rejection dual band-notch UWB antenna with X & Ku-bands wireless applications." International Journal of Microwave and Wireless Technologies 9, no. 8 (2017): 1725–33. http://dx.doi.org/10.1017/s1759078717000393.

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In this paper, a vase-shaped monopole antenna is presented for dual band notch (WiMAX IEEE802.16 3.30–3.80 GHz with C-band 3.80–4.20 GHz and WLAN IEEE802.11a/h/j/n 5.15–5.35 GHz, 5.25–5.35 GHz, 5.47–5.725 GHz, 5.725–5.825 GHz) UWB and other wireless services (close range radar: 8–12 GHz in X-band & satellite communication: 12–18 GHz in Ku-band). Measured VSWR of proposed antenna shows a high band-rejection for WiMAX along with C-band with VSWR = 25.33 at 3.77 GHz and WLAN with VSWR = 6.0 at 5.64 GHz is achieved by cutting two C-shaped slots on the radiating patch. Designed antenna covers a wide usable fractional bandwidth 160% (2.58–20.39 GHz). Furthermore, the measured gain of antenna is relatively stable across the impedance bandwidth except band-notched. In addition, antenna offers omni-directional pattern, reasonably small 20 × 20 × 0.787 mm3and easy to construct structure.

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45

Kahina, D., C. Mouloud, D. Mokrane, M. Faiza, and A. Rabia. "A Compact ACS-Fed Tri-band Microstrip Monopole Antenna for WLAN/WiMAX Applications." Advanced Electromagnetics 7, no. 5 (2018): 87–93. http://dx.doi.org/10.7716/aem.v7i5.853.

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This paper proposes a novel small asymmetric coplanar strip (ACS) fed tri-band monopole antenna for WLAN and WiMAX applications. To tune and create multiple resonant frequencies, the exciting strip of monopole antenna is connected to two different arms which are a J-shaped directed toward the asymmetric ground plane and an open stub. The proposed monopole antenna with a total size of 14.6 x17.5 mm2 is fabricated and tested. The measured results indicate that the antenna has impedance bandwidths for 10-dB return loss reach about 500 MHz (2.01-2.52 GHz), 230 MHz (3.48-3.71 GHz) and 1.2GHz (5.59-6.72 GHz) which cover widely the 2.4/5.8 GHz WLAN bands and the 3.5GHz WiMAX band. The simulated radiation patterns of the proposed antenna at the three resonant frequencies have a dipole-like radiation pattern in both E-and H-Planes. The compact size, the simple structure and good radiation performances of the proposed antenna makes it well-suited forthe intended applications.

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46

Mouhouche, F., A. Azrar, M. Dehmas, and K. Djafri. "A Compact Multi-Band Monopole Antenna using Metamaterial for WLAN/WiMAX Applications." Advanced Electromagnetics 8, no. 3 (2019): 92–98. http://dx.doi.org/10.7716/aem.v8i3.929.

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In this paper, a tri-band printed monopole antenna with electrically coupled metamaterial units is proposed and investigated. The proposed antenna is designed to cover WLAN/WiMAX applications. The antenna consists of a printed strip line and two double metamaterial unit cells of different size placed near the monopole antenna on opposite sides. Each unit cell exhibits a negative permeability over the resonance frequency at 2.5 GHz and 3.62 GHz, which produces magnetic couplings with the monopole antenna. The proposed antenna structure was fabricated and measured. The measured -10 dB bandwidth for the return loss is from 2.47GHz-2.51GHz, 3.59GHz-3.69GHz, and 5.3GHz - 7.2 GHz, which are suitable for (WLAN: 2.4–2.484, 5.15–5.35, and 5.725–5.85 GHz) and (WiMAX: 2.5–2.69, 3.4–3.8, and 5.25–5.85 GHz) band Applications. By using the switches across the gap of proposed-MTM unit cell, the effect of this unit deactivated and its resonance frequency will disappear. Hence, the proposed antenna maintains the omnidirectional radiation pattern.

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47

Pradeep, Pendli. "A Compact Metamaterial based Dual-Band Antenna with Improved Gain for WLAN Applications." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (2021): 2778–83. http://dx.doi.org/10.22214/ijraset.2021.35586.

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In this paper, a compact metamaterial inspired dual band antenna is proposed for WLAN and WiMAX applications. The antenna consists of Square Split Ring Resonator structure with a defected ground plane and slots to enhance the bandwidth and gain parameters. Metamaterial based Microstrip patch antenna produces unique electromagnetic properties that allows us to control over the antenna parameters with a compact size. FR-4 epoxy is used as substrate its dielectric constant is 4.4 and loss tangent is 0.02. Dimensions of the antenna are 20 x 12 x 1.6mm3 with very compact size and cost effective. The proposed metamaterial based antenna resonates at dual bands at 5.13GHz and 5.53 GHz with impedance bandwidth of (|S11|<-10 dB) 4.96-5.26 GHz (300MHz) and 5.34-5.69 GHz (350MHz) respectively. The peak gains at resonant frequencies 5.13 GHz and 5.53 GHz are 1.61 dB and 1.62dB respectively. The proposed metamaterial based compact antenna can effectively work for WLAN and WiMAX application.

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Madhav, B. T. P., K. Thirumalarao, M. Venkateswara Rao, V. N. V. Saiteja, J. Kranthi Kumar, and P. N. V. S. Reavanth. "Metamaterial inspire multiband monopole antenna with defected ground structure." International Journal of Engineering & Technology 7, no. 1.5 (2017): 90. http://dx.doi.org/10.14419/ijet.v7i1.5.9128.

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This article represents the design and analysis of a compact antenna of size 34mmX18mmX1.6mm on FR-4 substrate material. The designed antenna is having a slot at the partial ground for all iterations are observed and it is analysed with the help of ANSYS 17 Electronics Desktop. A new unit cell design which exhibits the metamaterial property is also analyzed with the help of unit cell analysis. The negative permittivity value is extracted, and that unit cell is implemented in the proposed antenna. The enhanced results have been carried out with comparing iteration wise. The proposed antenna has radiation efficiency of 94%, it works in the range of for LTE (33-37) band at 1.95-2.04 GHz, WiMAX band 2.87-3.76 GHz and LTE (43-44) bands 5.92-7.2 GHz.

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Zahraoui, I., A. Errkik, M. C. Abounaima, A. Tajmouati, L. E. Abdellaoui, and M. Latrach. "A New Planar Multiband Antenna for GPS, ISM and WiMAX Applications." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 4 (2017): 2018. http://dx.doi.org/10.11591/ijece.v7i4.pp2018-2026.

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In this paper a design of a new antenna with modified ground plane is validated for multiband applications. The proposed modified ground structure is incorporated with a patch antenna to boost the performance. The antenna’s entire area is 59.5x47mm<sup>2</sup> and is printed on an FR-4 substrate and fed by a 50 Ohm microstrip line. This structure is validated in the GPS (1.56-1.58 GHz) band at 1.57 GHz, in the ISM (2.43-2.49 GHz) band at 2.45GHz and in the WiMAX (3.50-3.56 GHz) band at 3.53 GHz. These three frequency bands have good matching input impedance for, S11≤-10 dB. The antenna presents a good performance in terms of radiation pattern, and it is designed, optimized, and miniaturized by using CST-MW whose results are compared with other solvers HFSS and ADS. The results obtained by the use of the three EM solvers are in good agreement. After realization, we have tested and validated this antenna. The measurement results of the antenna present a good agreement with the numerical results.

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Lan, Nguyễn Ngọc, Nguyễn Thị Thu Hằng, and Hồ Văn Cừu. "A Microstrip MIMO Antenna with Enhanced Isolation for WiMAX Applications." Journal of Research and Development on Information and Communication Technology 2019, no. 2 (2019): 99–105. http://dx.doi.org/10.32913/mic-ict-research.v2019.n2.869.

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In this paper, a multiple-input multipleoutput (MIMO) antenna with high isolation is designed using defected ground structure (DGS). The proposed antenna is constructed by two sets of four elements (2×2), which are designed at the central frequency of 3.5 GHz for Worldwide Interoperability for Microwave Access (WiMAX) applications. The antenna is fabricated on a FR4 substrate with an overall size of 144 × 99 × 1.6 mm. Thanks to DGS, the designed MIMO antenna achieves a high isolation of 30 dB and a high radiation efficiency of over 90%. Besides, this MIMO antenna attains a 7.5 dBi gain. There is a good agreement between the simulated S-parameters and the measurement results.

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Journal articles on the topic 'Wimax structure'

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