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Journal articles on the topic 'Ultra-Wide Bandwidth (UWB)'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 September 2024

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1

Park, Joong Suk, Jeong Woo Han, and Cam Nguyen. "Radio-Frequency Sensors for Nondestructive Evaluation of Materials." Advanced Materials Research 747 (August 2013): 765–68. http://dx.doi.org/10.4028/www.scientific.net/amr.747.765.

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We report several radio-frequency (RF) sensors for possible use in material NDE and process control: an ultra-wide band (UWB) impulse sensor and microwave and millimeter-wave stepped-frequency sensors. The UWB sensor generates ultra-short pulses directly while the stepped-frequency sensors produce ultra-short pulses indirectly through pulse-synthesis. Ultra-short pulses possess ultra-wide bandwidths and have uniquely desirable characteristics such as fine resolution and high accuracy for material assessment. The UWB impulse sensor operates over multiple pulse durations from 450 to 1170 ps with

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2

Liu, Chenming. "Ultra Wide Band Technology and Indoor Precise Positioning." SHS Web of Conferences 144 (2022): 02002. http://dx.doi.org/10.1051/shsconf/202214402002.

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UWB technology is a wireless carrier communication technology that uses frequency bandwidth above 1GHz. This essay mainly focuses on the theory of UWB and one of its most important applications, which is indoor positioning. It will explore some possibilities of UWB in the field of precise positioning. Based on the literature, the theory of UWB and the algorithm of positioning will be shown in a relatively simple way. The result shows that Ultra Wide Band (UWB) technology has the advantages of low system complexity, low power spectral density of transmitted signal, and insensitivity to channel

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Saeidi, Tale, Idris Ismail, Wong Peng Wen, Adam R. H. Alhawari, and Ahmad Mohammadi. "Ultra-Wideband Antennas for Wireless Communication Applications." International Journal of Antennas and Propagation 2019 (April 22, 2019): 1–25. http://dx.doi.org/10.1155/2019/7918765.

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A review paper concerning wide-band and ultra-wideband (UWB) antennas used for wireless communication purposes in terms of the materials as well as a numerical analysis is presented. These antennas which are taken into account are listed as wide-band microstrip antenna, wide-band monopole antenna over a plate, wide-slot UWB antenna, stacked patch UWB antenna, taper slot (TSA) UWB antenna, metamaterial (MTM) structure UWB antennas, elliptical printed monopole UWB antenna, and flexible wearable UWB antenna. The antennas’ performance is compared based on their size and how they can be applicable

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Ahmed, Arslan, Ghulam Hussain, and Ali Raza. "Ultra-Wide Band Horseshoe Antenna for Cognitive Radio Applications." Journal of Applied Engineering & Technology (JAET) 5, no. 1 (2021): 9–18. http://dx.doi.org/10.55447/jaet.05.01.34.

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In this paper, an Ultra-wide band (UWB) micro-strip antenna design is proposed to be suitable for Cognitive radio applications. The geometry of proposed antenna is composed of two semi-circles with their interior modified to achieve higher impedance bandwidth. The semi-etched ground enhances bandwidth to achieve higher data rate. The proposed antenna is fabricated on an inexpensive dielectric substrate FR-4 with relative permittivity of 4.4 and thickness of 1.6mm. The overall dimension of UWB antenna is 60x60x1.6mm and have a bandwidth of 5.7 GHz. The designed antenna covers the most commonly

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Rahman, MuhibUr. "CPW Fed Miniaturized UWB Tri-Notch Antenna with Bandwidth Enhancement." Advances in Electrical Engineering 2016 (October 10, 2016): 1–7. http://dx.doi.org/10.1155/2016/7279056.

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A Coplanar Waveguide (CPW) fed miniaturized ultra-wideband (UWB) tri-notch antenna with bandwidth enhancement is proposed. The antenna is prototyped for ultra-wideband (UWB) communication applications with bandwidth enhancement. By implementing asymmetric structure, the miniaturization in the antenna has been achieved with a very compact size of 22 × 13 × 1.5 mm3 making it suitable for USB dongle applications. The antenna is first simulated with partial rectangular ground plane which shows that operating bandwidth ranges from 3.1 to 10.6 GHz. Then the antenna is measured and simulated by cutti

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Mr. Anish Dhabliya. "Ultra Wide Band Pulse Generation Using Advanced Design System Software." International Journal of New Practices in Management and Engineering 2, no. 02 (2013): 01–07. http://dx.doi.org/10.17762/ijnpme.v2i02.14.

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In radio spectrum, Ultra Wide Band is a defined as the technology which is used for short range communication with high bandwidth at low energy dimensions. Ultra Wide Band technology find its application in radar imaging, location based services and live tracking. The Objective of this paper is to generate UWB pulse. Here UWB pulse generation is simulated using Advanced Design System software. The operation output pulse are obtained in the interval of 10usec for input pulse train of 10usec ON state and 10usec of OFF state at low inductive values of UWB generation circuit. The oscillations are

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Palaniswamy, Sandeep Kumar, Malathi Kanagasabai, Shrivastav Arun Kumar, M. Gulam Nabi Alsath, Sangeetha Velan, and Jayaram Kizhekke Pakkathillam. "Super wideband printed monopole antenna for ultra wideband applications." International Journal of Microwave and Wireless Technologies 9, no. 1 (2015): 133–41. http://dx.doi.org/10.1017/s1759078715000951.

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This paper presents the design, testing, and analysis of a clover structured monopole antenna for super wideband applications. The proposed antenna has a wide impedance bandwidth (−10 dB bandwidth) from 1.9 GHz to frequency over 30 GHz. The clover shaped antenna with a compact size of 50 mm × 45 mm is designed and fabricated on an FR4 substrate with a thickness of 1.6 mm. Parametric study has been performed by varying the parameters of the clover to obtain an optimum wide band characteristics. Furthermore, the prototype introduces a method of achieving super wide bandwidth by deploying fusion

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Zhu, Junli, Mengfei Chen, Ziting Li, and Jingping Liu. "A Compact Planar Ultra-Wideband Array Antenna." International Journal of Antennas and Propagation 2023 (October 10, 2023): 1–10. http://dx.doi.org/10.1155/2023/1339236.

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Ultra-wideband (UWB) antennas have recently gained prominence in communication, radar technology, and electronic warfare domains. The quick development of these antennas is due to the wide bandwidth requirements of pulse radar, ground penetrating radar, electromagnetic compatibility, spaceborne communication systems, stealth target detection, and more. Aiming to address the defects of existing UWB antennas, which often have narrow bandwidth and low gain, a planar ultra-wideband microstrip array antenna was designed to achieve good ultra-wideband characteristics and effectively improve the gain

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Elsheakh, Dalia M., and Esmat A. Abdallah. "Ultra-wide-bandwidth (UWB) microstrip monopole antenna using split ring resonator (SRR) structure." International Journal of Microwave and Wireless Technologies 10, no. 1 (2018): 123–32. http://dx.doi.org/10.1017/s1759078717001131.

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This paper presents a procedure to model an ultra wide-bandwidth (UWB) microstrip monopole antenna. The proposed antenna is composed of three different lengths of semi-circular shapes connected with circular disk and half circular modified ground plane. The proposed antenna has a size of 50 × 50 mm2on a low-cost FR4 substrate. The antenna demonstrates impedance bandwidth of −10 dB extended from 1.5 to 11 GHz with discontinuous bandwidth at different interior operating bands. Two pairs of split ring resonator as metamaterial structure cells are inserted closely located from feeding transmission

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Kiani, Saad Hassan, Huseyin Serif Savci, Mehr E. Munir, Ahmed Sedik, and Hala Mostafa. "An Ultra-Wide Band MIMO Antenna System with Enhanced Isolation for Microwave Imaging Applications." Micromachines 14, no. 9 (2023): 1732. http://dx.doi.org/10.3390/mi14091732.

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This paper introduces a novel two-port ultra-wideband (UWB) multiple-input multiple-output (MIMO) antenna system with enhanced isolation characteristics. The antenna, designed on a thin 0.787 mm RO5880 substrate, achieves a compact form factor of 52 × 26 mm2 and offers a wide bandwidth of 9.2 GHz (2.3 GHz to 11.5 GHz) while meeting the VSWR 2:1 criterion. Notably, the proposed antenna demonstrates an impressive increase in isolation, up to 16 dB, through the integration of a shared radiator with small rectangular slots, effectively reducing interference and improving overall performance. Furth

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Pan, Guan-Pu, Jiun-Da Lin, Tsung-lin Li, and Jwo-Shiun Sun. "Design of Ultra-Wideband Dielectric Resonator Antenna UsingCeramic-Filled PTFE Composites." WSEAS TRANSACTIONS ON SYSTEMS AND CONTROL 16 (April 19, 2021): 194–97. http://dx.doi.org/10.37394/23203.2021.16.16.

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In this paper, the new dielectric resonator antenna (DRA) is implemented by replacing the traditional dielectric resonator with a new material with low permittivity for ultra-wideband (UWB) application is presented and studied. A hybrid structure DRA was designed with parasitic slot to enhance the impedance bandwidth. The bandwidth met the specification of MB-OFDM for the bandwidth (3.168 GHz - 4.752 GHz). Finally, another antenna structure was designed. By applying the microstrip feed line, UWB and radiation characteristics are achieved. From the measured results, the proposed DRA showed good

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Grace, Gosangi Lilly. "DESIGN OF HIGHLY ISOLATED UWB MIMO ANTENNA USING STUBS BETWEEN GROUND PLANES." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 04 (2024): 1–5. http://dx.doi.org/10.55041/ijsrem31679.

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This study introduces an in-depth analysis and evaluation of a novel High-Isolation Ultra-Wideband (UWB) Multiple Input Multiple Output (MIMO)antenna design featuring the integration of Stubs between ground planes.The objective is to develop an antenna system capable of achieving high isolation between closely spaced antenna elements for MIMO applications while maintaining a wide operating bandwidth. The proposed antenna is composed of four slot antenna elements with a common rhombic slot, each fed by a microstrip-fed line to greatly reduce the overall size of the antenna.It has a compact size

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Chaudhary, Durgesh, and Akhilesh Kumar Mishra. "HFSS Design of Hexagonal Monopole Antenna with FR4 Epoxy substrate – 7.34 GHz Ultra-Wide Band Antenna for Smart Shopping Application." International Journal of Research in Advent Technology 9, no. 8 (2021): 5–10. http://dx.doi.org/10.32622/ijrat.98202107.

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The requirement to serve more users and provide more data at more incredible data speeds drives demand for wireless wideband communications. The Ultra-Wide Band (UWB) technology uses nanosecond-long pulses to span an extensive frequency range. The high bandwidth, low power consumption, and less fading due to multipath are attained in UWB communication technologies. This paper explains a hexagonal monopole antenna design using a high-frequency structure simulator (HFSS) and is further optimized for c better bandwidth. A hexagonal monopole antenna is designed using FR-4 epoxy metamaterial substr

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Che, Fuhu, Qasim Zeeshan Ahmed, Pavlos I. Lazaridis, Pradorn Sureephong, and Temitope Alade. "Indoor Positioning System (IPS) Using Ultra-Wide Bandwidth (UWB)—For Industrial Internet of Things (IIoT)." Sensors 23, no. 12 (2023): 5710. http://dx.doi.org/10.3390/s23125710.

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The integration of the physical and digital world has become increasingly important, and location-based services have become the most sought-after application in the field of the Internet of Things (IoT). This paper delves into the current research on ultra-wideband (UWB) indoor positioning systems (IPS). It begins by examining the most common wireless communication-based technologies for IPSs followed by a detailed explanation of UWB. Then, it presents an overview of the unique characteristics of UWB technology and the challenges still faced by the IPS implementation. Finally, the paper evalu

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Ali, Tasnuva, Poppy Siddiqua, and Mohammad A. Matin. "Performance Evaluation of Different Modulation Schemes for Ultra Wide Band Systems." Journal of Electrical Engineering 65, no. 3 (2014): 184–88. http://dx.doi.org/10.2478/jee-2014-0029.

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Abstract Ultra-wideband (UWB) signals with a large bandwidth has some advantages like multipath immunity, low transmission power, good resolution for ranging and detecting geo locations, as well as it can resist to narrow-band interference. These signals are used for transmission in short distance with high throughput. In this paper, we have analyzed different modulation schemes for performance comparison in terms of BER with UWB Gaussian second derivative monopulse and wavelet-based monopulse. The simulation results demonstrate that wavelet-based monopulse provides better performance in compa

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Bikrat, Mohamed, and Seddik Bri. "A Bandwidth Reconfigurable Planar Antenna for UWB-Applications." E3S Web of Conferences 351 (2022): 01060. http://dx.doi.org/10.1051/e3sconf/202235101060.

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A reconfigurable planar antenna design bandwidth operating in ultra wide band (UWB) applications with compact dimensions of (50 × 25× 1) mm3 is proposed. The switching capability is achieved by using a two PIN diodes F-shaped slot and a two narrow vertical slot. A defected ground structure is used to improve a range of frequency from 0.83 GHz to 5.24 GHz with an impedance bandwidth of 4.41 GHz. Moreover, the flow of current within the patch’s radiation is controlled via pair of PIN diodes situated at the centre with in the patch in the F-shape slot. A retractable patch antenna design is offere

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Ghazali, Mohd Ifwat Mohd, and Premjeet Chahal. "Ultra-Wideband High Gain Vivaldi Antennas Using Additive Manufacturing." International Symposium on Microelectronics 2018, no. 1 (2018): 000754–59. http://dx.doi.org/10.4071/2380-4505-2018.1.000754.

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Abstract In this paper, a low-cost fabrication technique using additive manufacturing (3D printing) is demonstrated for the fabrication of ultra-wide band (UWB) Vivaldi antennas. In communications, UWB antennas are required that have high gain and wide bandwidth (3.1 GHz to 10.6 GHz) enabling high-data rates and efficient use of frequency spectrum. 3D printing has evolved into an important technology that allows rapid and simple fabrication method for printing antennas, and other components. Two different Vivaldi antennas designs (i) Vivaldi with a slot line, and (ii) Corrugated Vivaldi are pr

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18

Zhang, Ting, Fei Xiao, Xiaohong Tang, and Lei Guo. "A multi-mode resonator-based UWB bandpass filter with wide stopband." International Journal of Microwave and Wireless Technologies 8, no. 7 (2015): 1031–35. http://dx.doi.org/10.1017/s1759078715001026.

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In this paper, a novel multi-mode resonator is presented, which is formed by cascading several open-circuited transmission line sections with a coupled-line section. Owing to its symmetry, even- and odd-mode analysis methods are applied to analyze its resonance characteristic. Based on this resonator, a microstrip ultra-wide bandwidth (UWB) bandpass filter is designed, fabricated, and measured. The simulated and measured results show that its bandwidth can cover the desired UWB. Return loss in passband is better than −14 dB. This filter is featured by good selectivity and wide stopband. Stopba

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19

Kaiser, T. "On UWB beamforming." Advances in Radio Science 2 (May 27, 2005): 163–67. http://dx.doi.org/10.5194/ars-2-163-2004.

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Abstract. Ultra-Wideband (UWB) communication systems and Multi-Input-Multi-Output (MIMO) techniques rank among the few emerging key technologies in wireless communications. For that reason the marriage of these two complementary approaches should deserve attention. Apparently, the extremely large ultra-wide bandwidth creates rich multipath diversity which calls, at a first glance, additional antenna elements into question. However, another point of view is as follows. The attenuation by solid materials usually increases with increasing frequency; e.g. frequencies above, say, 10 GHz are conside

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Pastukh, Alexander, Evgeny Deviyatkin, Alexandr Savochkin, and Valery Tikhvinskiy. "INTERFERENCE ANALYSIS OF UWB DEVICES TO THE SATELLITE SERVICES IN THE 7240-8240 MHZ FREQUENCY BAND." SYNCHROINFO JOURNAL 8, no. 3 (2022): 2–6. http://dx.doi.org/10.36724/2664-066x-2022-8-3-2-6.

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Ultra-wideband radio technology (UWB), is a wireless access technology that allows exchanging of data over a radio channel between over short distances at very high speed and low power consumption. UWB signals are short pulses the entire energy of which is distributed over a given wide region of the spectrum. With a sufficiently high total power transmitted over the air and with low power consumption and a pulsed nature of data transmission, a high data transmission rate can be obtained. This work has done interference analysis of ultra-wide bandwidth technologies (UWB) operating in the freque

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Nour, Amro A., Ali Bostani, and Girish Awadhwal. "A Tapered Fork-Shaped Antenna With Small Ground Plane for UWB Applications." International Journal of Interdisciplinary Telecommunications and Networking 13, no. 1 (2021): 13–24. http://dx.doi.org/10.4018/ijitn.2021010102.

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A tapered fork-shaped antenna having small ground for ultra-wide band (UWB) antenna is proposed in this paper. Finite element method has been successfully employed to simulate and optimize the feed line, ground, and tapered fork-shaped diameter to enhance the performance of the antenna in terms of bandwidth obviously for the ultra-wideband purposes. An acceptable impedance matching performance has been achieved, which is a band wider than the UWB band that is defined by the Federal Communications Commission (FCC). In this paper, the detailed design parameters including the key elements in band

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Abdi, H., J. Nourinia, and C. Ghobadi. "Compact Enhanced CPW-Fed Antenna for UWB Applications." Advanced Electromagnetics 10, no. 1 (2021): 15–20. http://dx.doi.org/10.7716/aem.v10i1.1472.

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This paper presents a compact antenna with co-planar waveguide (CPW) feed line for ultra-wideband (UWB) applications. The proposed antenna consists of a beveled radiating patch with wide rectangular slit at its upper side and a partial ground plane with insertion of symmetrically two-step beveled tapers at its center and sides, which provides a wide operating bandwidth. The antenna is integrated with narrow rectangular-shaped parasitic elements with different lengths placed adjacent to radiant patch to significantly enhance the impedance matching and bandwidth, especially at the upper frequenc

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ISSA, DALENDA BEN, ABDENNACEUR KACHOURI, and MOUNIR SAMET. "NEW CONCEPT OF 3.2–4.8 GHz IMPULSE GENERATOR FOR UWB TRANSMITTER." Journal of Circuits, Systems and Computers 20, no. 02 (2011): 313–27. http://dx.doi.org/10.1142/s021812661100727x.

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A new design of Ultra-Wide band (UWB) generator is described in this paper. The UWB impulse generator circuit is the most essential block in a mono-band UWB transmitter. The proposed ultra wide band impulse generator circuit utilizes the performances of the CMOS technology effectively, it is composed of a voltage controlled oscillator (VCO), and a rectangular pulse generator (RPG) and mixer. The RPG circuit consists of a frequency divider 1/128 circuit, time delay, N-inverters and AND gate function. The impulse UWB generator is based on the rectangular pulse modulated with the aim of generatin

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Sabah, Anwar, and Malik Jasim Frhan. "A new patch antenna for ultra wide band communication applications." Indonesian Journal of Electrical Engineering and Computer Science 18, no. 2 (2020): 848. http://dx.doi.org/10.11591/ijeecs.v18.i2.pp848-855.

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<span>A printed monopole patch Ultra Wide Band (UWB) antenna for use in UWB application is proposed in this paper. The proposed antenna consists of a patch with appropriate dimensions on one side of a dielectric substrate, and a partial ground plane on the other side of the substrate. The techniques that used to enhance the bandwidth are the partial ground plane, feed point position and adjusted feed gap. The substrate that is used in the proposed antenna is Fr4 epoxy, the optimum dimensions of the antenna are 40mm×28mm×1.5mm this antenna designed by HFSS program. The band achieved by th

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AL-shamili, Mohammed Amer Hamed, and Madan Kumar Sharma. "Meta-surface (frequency selective surface) loaded high gain directional antenna systems for ultra-wideband applications." International Journal of Electrical and Computer Engineering (IJECE) 13, no. 1 (2023): 511. http://dx.doi.org/10.11591/ijece.v13i1.pp511-521.

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<span lang="EN-US">In this work, a meta-surface (frequency selective surface) loaded high gain directional antenna system is presented. The antenna system is developed using ultra-wideband (UWB) antenna element and meta-surface reflector. The UWB antenna element is designed and simulated without meta-surface reflector. The UWB antenna element has poor impedance bandwidth and directivity. A meta-surface is created using unit cell and equal in the size of the antenna substrate. The meta-surface is placed over the UWB antenna element at optimized height (H=30 mm). The impedance bandwidth, d

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Karoui, M. S., N. Ghariani, M. Lahiani, and H. Ghariani. "Bandwidth Enhancement of a Bell-shaped UWB Antenna for Indoor Localization Systems." Engineering, Technology & Applied Science Research 11, no. 1 (2021): 6691–95. http://dx.doi.org/10.48084/etasr.3975.

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In this paper, a simple method of enhancing the bandwidth of the Bell-shaped UWB Antenna for indoor localization systems is proposed. Therefore, a modified version of the bell-shaped Ultra-Wide Band (UWB) antenna for indoor localization systems is presented. The proposed antenna is printed on a low-cost FR-4 substrate of 21×27×1.6mm3 size. It is composed of a bell-shaped radiating patch and a multi-slotted ground plane. The measured results show that the proposed antenna has an impedance bandwidth of about 11.2GHz ranging from 3.16GHz to 14.36GHz at S11<−10dB. Compared to the original versi

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Hussain, Musa, Md Abu Sufian, Mohammed S. Alzaidi, et al. "Bandwidth and Gain Enhancement of a CPW Antenna Using Frequency Selective Surface for UWB Applications." Micromachines 14, no. 3 (2023): 591. http://dx.doi.org/10.3390/mi14030591.

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In this article, a single-layer frequency selective surface (FSS)-loaded compact coplanar waveguide (CPW)-fed antenna is proposed for very high-gain and ultra-wideband applications. At the initial stage, a geometrically simple ultra-wideband (UWB) antenna is designed which contains CPW feed lines and a multi-stub-loaded hexagonal patch. The various stubs are inserted to improve the bandwidth of the radiator. The antenna operates at 5–17 GHz and offers 6.5 dBi peak gain. Subsequently, the proposed FSS structure is designed and loaded beneath the proposed UWB antenna to improve bandwidth and enh

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Jerome Daim, Terence, and Razak Mohd Ali Lee. "A weighted least squares consideration for IR-UWB radar based device-free object positioning estimation for indoor environment." Indonesian Journal of Electrical Engineering and Computer Science 15, no. 2 (2019): 894. http://dx.doi.org/10.11591/ijeecs.v15.i2.pp894-901.

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<p>Impulse Radio Ultra-Wideband (IR-UWB) radar is a type of radar functioning based on UWB transmission technology that uses an exceedingly wide bandwidth low power impulse signal to continuously transmitting and receiving the impulse signal for object detection within a range. To date, most of the proposed Ultra-Wideband (UWB) transmission technology based object positioning estimation systems for indoor environment depends on objects to be attached with an active UWB devices. In certain circumstances, it is ideal to track objects in passive manner without the requirement of any attache

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Ramya, Fares Alharbi, and Naresh Kumar. "Design and Analysis of Dual Monopole Antennas for Long-Term Evolution and Ultra-Wideband Applications: Narrow and Wide Band Variants." Journal of Nanoelectronics and Optoelectronics 19, no. 7 (2024): 716–23. http://dx.doi.org/10.1166/jno.2024.3625.

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Wireless communication systems continue to evolve, with LTE and UWB technologies at the forefront of this advancement. LTE (Long-Term Evolution) networks demand efficient antennas to support high-speed data transmission, while UWB (Ultra-Wideband) systems require antennas capable of operating across a broad spectrum. Monopole antennas have emerged as promising candidates for meeting these demands due to their compact size and versatility. In this study, we delve into the design and analysis of dual monopole antennas, tailored to cater to both LTE and UWB applications, with variants optimized f

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Peng, Haijun, Chunhua Wang, Lv Zhao, and Jun Liu. "Novel SRR-loaded CPW-fed UWB antenna with wide band-notched characteristics." International Journal of Microwave and Wireless Technologies 9, no. 4 (2016): 875–80. http://dx.doi.org/10.1017/s1759078716000702.

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This paper presents the design of a split-ring resonators (SRR) loaded coplanar waveguide-fed ultra-wide band (UWB) antenna. As using the electromagnetic coupling SRR connected by open-ended microstrip lines, this UWB antenna achieves wide band-notched characteristics. The frequency of the proposed antenna operates from 2.37 to 10.93 GHz with a broad notch band covers from 4.96 to 6.15 GHz (IEEE 802.11.ac), the relative stopped bandwidth of the notch band achieves 20.42%. Besides, theoretical analysis and experimental results are proposed to illustrate and validate this proposed antenna.

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Sivasamy, Ramprabhu, Balaji Moorthy, Malathi Kanagasabai, Jithila V. George, Livya Lawrance, and Dinesh Babu Rajendran. "Polarization-independent single-layer ultra-wideband frequency-selective surface." International Journal of Microwave and Wireless Technologies 9, no. 1 (2015): 93–97. http://dx.doi.org/10.1017/s1759078715001439.

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An ultra-wideband (UWB) frequency-selective surface (FSS) exhibiting band rejection characteristic is presented in this paper. The proposed unit cell has the size of 14 × 14 mm2 which is approximately 0.18 × 0.18 λo, where λo corresponds to free space wavelength at the lower cut-off frequency. The proposed UWB FSS consists of a single-layer substrate and provides 20 dB attenuation level for a wide bandwidth of 7.53 GHz at the normal incidence. The proposed FSS is polarization independent and also provides angular-independent operation for the EM wave incidences of 15°, 30° and 45° with 11.5 dB

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Tantiparimongkol, Lalida, and Pattarapong Phasukkit. "IR-UWB Pulse Generation Using FPGA Scheme for through Obstacle Human Detection." Sensors 20, no. 13 (2020): 3750. http://dx.doi.org/10.3390/s20133750.

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This research proposes a scheme of field programmable gate array (FPGA) to generate an impulse-radio ultra-wideband (IR-UWB) pulse. The FPGA scheme consists of three parts: digital clock manager, four-delay-paths stratagem, and edge combiner. The IR-UWB radar system is designed to detect human subjects from their respiration underneath the rubble in the aftermath of an earthquake and to locate the human subjects based on range estimation. The proposed IR-UWB radar system is experimented with human subjects lying underneath layers of stacked clay bricks in supine and prone position. The results

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Parthiban, N., and M. Mohamed Ismail. "Efficient Microstrip Antenna system using Reduced GP Structure for Ultra-Wide Band (UWB) Applications." YMER Digital 20, no. 12 (2021): 790–807. http://dx.doi.org/10.37896/ymer20.12/72.

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Microstrip antenna is an essential choice for Ultra Wide Band (UWB) applications of its light weight, low profile and easy to form antenna arrays. However, the design of microstrip patch antenna bandwidth is greatly affects by the dielectric substrate material (FR4). In this research, the bandwidth enhancement of MPA was designed by minimizing the dimension of Defected GP (DGP) in GP for Ultra Wide Band wireless applications. But, the antenna design complexity increases with the number of an operating frequency band. In this research, the MPA was designed as small as size of 10×13×1.6 mm and o

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Hamed, Ahmed, and Ayman Ismail. "Graphical Design Approach for UWB Stacked CG LNA Using Inversion Coefficient." Electronics 13, no. 9 (2024): 1602. http://dx.doi.org/10.3390/electronics13091602.

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The design of ultra-wide-band (UWB) low-noise amplifiers (LNAs) entails a large number of design challenges and tradeoffs, which include sustaining good input matching over a wide bandwidth along with finding a proper compromise between various LNA performance metrics, such as gain, bandwidth, noise figure, power, and linearity. This paper presents a design approach for UWB LNAs based on the inversion coefficient (IC). The proposed approach is a graphical design approach where the proper operating point is chosen based on predefined constraints. A complete systematic solution is presented for

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Din, Iftikhar Ud, Sadiq Ullah, Syeda Iffat Naqvi, et al. "Improvement in the Gain of UWB Antenna for GPR Applications by Using Frequency-Selective Surface." International Journal of Antennas and Propagation 2022 (October 29, 2022): 1–12. http://dx.doi.org/10.1155/2022/2002552.

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In this article, high-gain ultra-wideband (UWB) monopole antenna is presented. The UWB monopole antenna is a semicircular-shaped antenna with a semicircular slot at the top side. The bottom plane consists of partial ground with triangular and rectangular slotted structures to improve the impedance bandwidth of the proposed antenna. In order to enhance gain, a 6 × 6 metallic reflector (FSS) is placed below the antenna. The performance of the offered design is validated experimentally. The simulated results show resemblance with the measured results. The antenna resonates for the UWB ranging fro

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Othman, Adib, Nur Ishmah Sabirah Shaari, Abdullah M. Zobilah, Noor Azwan Shairi, and Zahriladha Zakaria. "Design of compact ultra wideband antenna for microwave medical imaging application." Indonesian Journal of Electrical Engineering and Computer Science 15, no. 3 (2019): 1197. http://dx.doi.org/10.11591/ijeecs.v15.i3.pp1197-1202.

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<p>A compact ultra wideband (UWB) antenna for operation at 6 GHz intended for microwave medical imaging (MMI) application is proposed. The microstrip patch antenna (MPA) was design in hexagon shape which is contain H-slot at the centre top of the patch and a slot at the ground. Those slots method is utilised to enhance the operating bandwidth as well as minimising the antenna’s impedance mismatch caused by its proximity to material. Results shows that, the implementation of slot on the patch has profoundly enhance the bandwidth (BW) of the antenna to 503.54 MHz. Measurement of fabricated

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Zhuang, Xiaoyan, Yijiu Zhao, Li Wang, and Houjun Wang. "UWB signal receiver with sub-Nyquist rate sampling based on compressed sensing." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 33, no. 1/2 (2013): 556–66. http://dx.doi.org/10.1108/compel-12-2012-0392.

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Purpose – The purpose of this paper is to present a compressed sensing (CS)-based sampling system for ultra-wide-band (UWB) signal. By exploiting the sparsity of signal, this new sampling system can sub-Nyquist sample a multiband UWB signal, whose unknown frequency support occupies only a small portion of a wide spectrum. Design/methodology/approach – A random Rademacher sequence is used to sense the signal in the frequency domain, and a matrix constructed by Hadamard basis is used to compress the signal. The probability of reconstruction is proved mathematically, and the reconstruction matrix

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Chen, Xiaodong, Jianxin Liang, Pengcheng Li, and Choo C. Chiau. "UWB Electric and Magnetic Monopole Antennas." African Journal of Information & Communication Technology 2, no. 1 (2006): 21. http://dx.doi.org/10.5130/ajict.v2i1.6.

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This paper summarizes our recent advances in antenna designs for ultra wideband (UWB) applications. Two types of monopoles are studied and developed in our research group. The first type belongs to the electric monopole with a circular disc fed by three different feeding structures. The second type is the magnetic monopole with an elliptical slot. The performances of these two types of antennas are evaluated in both frequency and time domains. The important design parameters for achieving optimal operations are also analyzed. It is shown that both electric and magnetic monopoles can provide ul

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Singhal, Sarthak, Ankit Pandey, and Amit Kumar Singh. "CPW-fed circular-shaped fractal antenna with three iterations for UWB applications." International Journal of Microwave and Wireless Technologies 9, no. 2 (2015): 373–79. http://dx.doi.org/10.1017/s1759078715001506.

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A coplanar waveguide (CPW)-fed circular-shaped fractal antenna with third iterative orthogonal elliptical slot for ultra-wideband applications is presented. The bandwidth is enhanced by using successive iterations of radiating patch, CPW feedline, and tapered ground plane. An impedance bandwidth of 2.9–20.6 GHz is achieved. The designed antenna has omnidirectional radiation patterns along with average peak realized gain of 3.5 dB over the entire frequency range of operation. A good agreement is observed between the simulated and experimental results. This antenna structure has the advantages o

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Ullah, Shahid, Cunjun Ruan, Muhammad Shahzad Sadiq, Tanveer Ul Haq, and Wenlong He. "High Efficient and Ultra Wide Band Monopole Antenna for Microwave Imaging and Communication Applications." Sensors 20, no. 1 (2019): 115. http://dx.doi.org/10.3390/s20010115.

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The paper presents a highly efficient, low cost, ultra-wideband, microstrip monopole antenna for microwave imaging and wireless communications applications. A new structure (z-shape, ultra-wideband (UWB) monopole) is designed, which consists of stepped meander lines to achieve super-wide bandwidth and high efficiency. Three steps are used to design the proposed structure for the purpose to achieve high efficiency and wide bandwidth. The antenna bandwidth is enhanced by varying the length of meander line slots, optimization of the feeding line and with the miniaturization of the ground width. T

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Mobashsher, Ahmed Toaha, and Mohammad Tariqul Islam. "Design, Investigation and Measurement of A Compact Ultra Wideband Antenna for Portable Applications." Measurement Science Review 13, no. 4 (2013): 169–76. http://dx.doi.org/10.2478/msr-2013-0031.

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The design of a printed compact planar antenna of asymmetrical structure with ultra wide bandwidth is described and investigated in this paper. The antenna provides more than 114% impedance bandwidth below VSWR 2 (from 3.3 to more than 12 GHz) with a center frequency of 7.65 GHz; thus it covers the bandwidth requirement for portable UWB wireless device applications. The structure of the asymmetric proposed antenna is very simple and composed of a small hexagonal shaped patch with two asymmetrical coplanar ground planes. It occupies an area of only 20 × 24.5 mm2 when printed on one side of an F

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Anbumani, Sivabalan, and Jothilakshmi Palanisamy. "A WIDE SPECTRUM OF HEXAGON EIGHTH MODE SUBSTRATE FOR C, S AND X BAND APPLICATIONS." DYNA 99, no. 3 (2024): 267–71. http://dx.doi.org/10.6036/10897.

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The following article explains how to make a basic ultra-wide bandwidth (UBW) wearable fractal antenna. The antenna is printed on denim fabric with a dielectric constant of 1.7 and a loss tangent of 0.02. The suggested antenna is 45 x 44.92 x 0.5 mm3. The antenna is fed by an inserted microstrip line with a decreased ground structure. It operates at ultrawide band frequencies of 4.36 GHz to 11.12 GHz. The antenna offers an omnidirectional radiation pattern with a gain of more than 2.4 dBi across the entire working band... It achieves a bandwidth of 6767 MHz. The proposed antenna possesses key

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Orlenko, O., L. Varyanytsya-Roshchupkina, G. Pochanin, S. Masalov, and V. Korzh. "Suppression of postpulse oscillations in active bow-tie antennas." RADIOFIZIKA I ELEKTRONIKA 26, no. 4 (2021): 3–15. http://dx.doi.org/10.15407/rej2021.04.003.

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Subject and Purpose. This theoretical and experimental research is devoted to peculiarities of the ultra-wide bandwidth (UWB) pulse radiation from active bow-tie dipoles. The focus is on the relationship between the amplitude-time dependences of electromagnetic fields produced by active UWB pulsed antennas and the configuration of the conductive components for temporally short (less than 0.5 ns), ultra-wide-bandwidth pulse radiation. Methods and Methodology. Analysis of the radiator geometry action on the emitted pulse parameters is performed by numerical simulation with the use of the finite-

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Al-Bawri, Samir Salem, Hui Hwang Goh, Md Shabiul Islam, et al. "Compact Ultra-Wideband Monopole Antenna Loaded with Metamaterial." Sensors 20, no. 3 (2020): 796. http://dx.doi.org/10.3390/s20030796.

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A printed compact monopole antenna based on a single negative (SNG) metamaterial is proposed for ultra-wideband (UWB) applications. A low-profile, key-shaped structure forms the radiating monopole and is loaded with metamaterial unit cells with negative permittivity and more than 1.5 GHz bandwidth of near-zero refractive index (NZRI) property. The antenna offers a wide bandwidth from 3.08 to 14.1 GHz and an average gain of 4.54 dBi, with a peak gain of 6.12 dBi; this is in contrast to the poor performance when metamaterial is not used. Moreover, the maximum obtained radiation efficiency is 97%

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K. Devarajan, M. Saravanan,. "DESIGN AND ANALYSIS OF ULTRA WIDE BAND ELLIPTICAL SLOT WITH QUARTER WAVE TRANSMISSION LINE GROUND FOR WIRELESS APPLICATIONS." INFORMATION TECHNOLOGY IN INDUSTRY 9, no. 1 (2021): 22–31. http://dx.doi.org/10.17762/itii.v9i1.84.

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UltraWide Bandwidth (UWB) antenna with Deflected Ground Structure for wireless communication is presented in this paper. Our proposed antenna design is consisting of elliptical shape slot at patch and Quarter wave transmission line at the ground with multiband frequency operation in various wireless communications.An antenna is designed using FR4 substrate with permittivity value of 4.4 and thickness of 0.8 mm. The size of the antenna is 50 x 70 mm2presents a high gain of 4 dB with Ultra Wide Bandwidth. In proposed antenna quarter wave ground is imposed with Deflected Ground Structure to achie

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Sharma, Rajni, Rajpati Yadav, and Amit Sharma. "Design and Simulation of Rectangular Slotted Patch Antenna with Air Gap." International Journal of Advance Research and Innovation 2, no. 1 (2014): 53–57. http://dx.doi.org/10.51976/ijari.211408.

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A compact and ultra-wideband CPW-fed antenna with wide band frequency characteristic has been proposed, and the simulation results are discussed. Due to its electrical characteristics such as very small volume, wide impedance bandwidth, WiMAX band rejection, omnidirectional radiation pattern, and small group delay, the proposed antenna is expected to be a good candidate in various UWB systems.The bandwidth of the proposed antenna to be 2.7 GHz and a center frequency of 2.6GHz is obtained with return loss of -18.58dB. VSWR is less the 2 in the range of frequency 1.8 to 4.6 GHz. The proposed ant

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Alsaif, H. "Highly Compact Design of Trimmed Patch with Modified Partial Ground Structure for Extreme-Wideband Systems." Engineering, Technology & Applied Science Research 7, no. 5 (2017): 1918–21. http://dx.doi.org/10.48084/etasr.1416.

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In this paper, a novel highly compact microstrip monopole antenna with adjusted ground plane for ultra-wideband (UWB) applications is proposed. The patch antenna is composed of a trimmed radiator and rectangular ground plane with four slots providing relatively extreme wide operating frequency from 2.8 till 16.2 GHz based on -10 dB criteria. The high matching impedance in the design results in ultra-wide bandwidth that covers the entire BW allocated by FCC for UWB applications. At the same time, the presented antenna is distinguished by significantly miniaturized structure with total size of 1

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Elajoumi, S., A. Tajmouati, A. Errkik, Am Sanchez, and M. Latrach. "Microstrip Rectangular Monopole Antennas with Defected Ground for UWB Applications." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 4 (2017): 2027. http://dx.doi.org/10.11591/ijece.v7i4.pp2027-2035.

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This paper presents the design of new compact antennas for ultra wide band applications. Each antenna consists of a rectangular patch fed by 50Ω microstrip transmission line and the ground element is a defected ground structure (DGS). The aim of this study is to improve the bandwidth of these antennas by using DGS and the modification geometry of rectangular structure, which gives new compact antennas for UWB applications. The input impedance bandwidth of the antennas with S11&lt;-10dB is more than 10GHz, from 3GHz to more than 14 GHz. The proposed antennas are investigated and optimized b

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Karimi, Gholamreza, Farnaz Khamin-Hamedani, and Hesam Siahkamari. "Compact UWB BPF using slotted resonator with an independently controllable notched band." International Journal of Microwave and Wireless Technologies 8, no. 1 (2014): 25–31. http://dx.doi.org/10.1017/s1759078714001251.

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In this paper, a novel compact ultra-wideband (UWB) bandpass filter (BPF) without and with one sharply notched band is presented. The UWB bandpass characteristic is achieved using slotted resonators (SR) and a notch is obtained by spiral defected ground structure (SDGS) without any change in SR structure. Center frequency of the notched band can be easily changed (from 5 to 9 GHz) by tuning the dimensions of SDGS. To verify the feasibility of the proposed filter, two UWB BPFs, one without the notched band and the other with a notched band, at 8.0 GHz are developed and fabricated, there by supp

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Biteur, Kada, Belkacem Benadda, and Ahmed Ayad. "New approach to a DS-CDMA-UWB system using a pseudo orthogonal code (POC)." Facta universitatis - series: Electronics and Energetics 35, no. 4 (2022): 483–93. http://dx.doi.org/10.2298/fuee2204483b.

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Ultra-Wideband Direct Sequences Code Division Multiple Access (DS-DMA) plays an important role in the case of multi-terminal multi-application communications of UWB devices. In the case of UWB systems that exploit the injection of the pulse itself directly to the antenna hence the very wide bandwidth, generation of suitable DS-CDMA codes poses a real challenge. In this paper we will describe our novel UWB transmission which uses pseudo-orthogonal time code (POC) as DS-CDMA sequences. The suggested codes are unipolar sequences with chips that may be dynamically modified to target a certain numb

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