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Journal articles on the topic 'Compact spiral antennas'

Author: Grafiati

Published: 6 September 2023

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1

Habeeb Bello, Khalid Idris Nazifi, and Sanusi Mohammed Sadiq. "Investigation and design methods of a compact patch antennas using 3-D MMIC for various applications." Global Journal of Engineering and Technology Advances 15, no. 3 (2023): 096–106. http://dx.doi.org/10.30574/gjeta.2023.15.3.0109.

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This work focused on the design, characterization and investigation of GaAs based multi-layered compact 3D MMIC based antenna. Different patch antennas were designed and characterized along with its S-parameters. Two proposed models of multi-layered patch antenna using V-shaped feeder line and planar feeder line with a spiral transmission line in metal-2 were more compact in size and showed an improvement in performance based on bandwidth compared to the traditional planar feeder line configuration. This implies the proposed planar feed line with the spiral transmission is cost effective. The

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2

Das, Swarup, Debasis Mitra, and Sekhar Ranjan Bhadra Chaudhuri. "Design of UWB Planar Monopole Antennas with Etched Spiral Slot on the Patch for Multiple Band-Notched Characteristics." International Journal of Microwave Science and Technology 2015 (October 20, 2015): 1–9. http://dx.doi.org/10.1155/2015/303215.

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Three types of Ultrawideband (UWB) antennas with single, double, and triple notched bands are proposed and investigated for UWB communication applications. The proposed antennas consist of CPW fed monopole with spiral slot etched on the patch. In this paper single, double, and also triple band notches with central frequency of 3.57, 5.12, and 8.21 GHz have been generated by varying the length of a single spiral slot. The proposed antenna is low-profile and of compact size. A stable gain is obtained throughout the operation band except the three notched frequencies. The antennas have omnidirect

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3

Zhao, Dechun, Xiaoyu Chen, Longsheng Zhang, and Huiquan Zhang. "Design of the Micro-Strip Antenna for Wireless Capsule Endoscope." Journal of Information Technology Research 8, no. 3 (2015): 43–58. http://dx.doi.org/10.4018/jitr.2015070103.

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This paper analyzed the type of mini-type antenna, studied the miniaturization technique based on simulation in depth, and finally designed the high-performance micro-strip antenna. The advantages of micro-strip antenna are light-weight, compact size, relatively thin thickness, and so on. However, it still needs aggressive miniaturization to satisfy the requirements of encapsulation. Techniques for miniaturization of antenna mainly include a ground plane, double-layer patch, shorting pin or wall, lossless dielectric substrate and the spiral structure. The techniques of multi-layer and shorting

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4

Elsheakh, Dalia M., and Esmat A. Abdallah. "Compact multiband printed-IFA on electromagnetic band-gap structures for wireless applications." International Journal of Microwave and Wireless Technologies 5, no. 4 (2013): 551–59. http://dx.doi.org/10.1017/s1759078713000263.

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Fourth generation mobiles require multi-standard operating handsets with small physical size as well as increasing demand for higher data rates. Compact multi-band printed inverted-F antennas (IFA) for available wireless communications are proposed in this paper. New design of printed IFA based on uniplanar compact electromagnetic band-gap (EBG) structure concept is proposed. A printed-IFA with L-load shaped over an artificial ground plane is designed as the main antenna to cover most wireless applications such as GSM, LTE, UMTS, Bluetooth, Wimax, and WLAN. The multi-band is created by means o

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5

Elsheakh, Dalia, and Esmat Abdallah. "Compact Multiband Printed IFA on Electromagnetic Band-Gap Structures Ground Plane for Wireless Applications." International Journal of Microwave Science and Technology 2013 (February 12, 2013): 1–9. http://dx.doi.org/10.1155/2013/248501.

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The fourth mobile generation requires of multistandard operating handsets of small physical size as well as has an increasing demand for higher data rates. Compact multiband printed inverted-F antennas (IFAs) for available wireless communications are proposed in this paper. A new design of a printed IFA based on a uniplanar compact EBG concept is proposed. An L-loaded printed IFA shaped over an artificial ground plane is designed as the main antenna to cover the GSM, LTE, UMTS, bluetooth, and WLAN. The multi-band is created by means of an electromagnetic band-gap (EBG) structure that is used a

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6

Setiyowati, Diah, Syah Alam, and Indra Surjati. "Miniaturization of Microstrip Antenna Using Spiral labyrinth Method at Frequency of Work 3.5 GHz." JOURNAL OF INFORMATICS AND TELECOMMUNICATION ENGINEERING 5, no. 2 (2022): 520–31. http://dx.doi.org/10.31289/jite.v5i2.5650.

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Along with the times, communication technology has developed so that it is currently included in the Fifth Generation (5G) Communication System. The 5G communication system is divided into three frequency categories, namely low band, middle band and high band. One of the important devices in the telecommunications sector is the antenna. Antenna serves to send and receive electromagnetic signals at a certain working frequency. Currently, antennas have been completely integrated into the needs of modern society. One type of antenna that can support the needs of today's technology is a microstrip

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7

Kola, Kalyan Sundar, Anirban Chatterjee, and Deven Patanvariya. "Design of a compact high gain printed octagonal array of spiral-based fractal antennas for DBS application." International Journal of Microwave and Wireless Technologies 12, no. 8 (2020): 769–81. http://dx.doi.org/10.1017/s1759078720000239.

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AbstractThis paper presents a compact octagonal array of microstrip patch antennas for direct broadcast satellite (DBS) (12.2–12.7 GHz) services. The proposed single element of this array is a new fractal antenna, having considerably high gain and can heavily suppress cross polarization along the main beam direction. The single element is derived from a 2D spiral geometry. The corporate feed network of the array is designed in such a manner to make the structure very compact. The fabricated single element resonates at 12.51 GHz and gives a gain and bandwidth of 9.32 dBi and 280 MHz, respective

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8

Yahyaoui, Ali, Ahmed Elsharabasy, Jawad Yousaf, and Hatem Rmili. "Numerical Analysis of MIM-Based Log-Spiral Rectennas for Efficient Infrared Energy Harvesting." Sensors 20, no. 24 (2020): 7023. http://dx.doi.org/10.3390/s20247023.

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This work presents the design and analysis of a metal-insulator-metal (MIM)-based optical log spiral rectenna for efficient energy harvesting at 28.3 THz. To maximize the benefits of the enhanced field of the proposed nano-antenna in the rectification process, the proposed design considers the antenna arms (Au) as the electrodes of the rectifying diode and the insulator is placed between the electrode terminals for the compact design of the horizontal MIM rectenna. The rectifier insulator, Al2O3, was inserted at the hotspot located in the gap between the antennas. A detailed analysis of the ef

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9

Guinvarc'h, Regis, Mohammed Serhir, and Fabrice Boust. "A Compact Dual-Polarized 3:1 Bandwidth Omnidirectional Array of Spiral Antennas." IEEE Antennas and Wireless Propagation Letters 15 (2016): 1909–12. http://dx.doi.org/10.1109/lawp.2016.2542982.

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10

Kim, Jang-Yeol, Nam Kim, Seungwoo Lee, and Kwan-Ho Shin. "Compact Printed Antennas for Triple Band-Notched UWB Using Cmlsrrs And Spiral Resonators." Microwave and Optical Technology Letters 55, no. 10 (2013): 2265–69. http://dx.doi.org/10.1002/mop.27944.

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11

Hu, Ping, Hong-Wei Wu, Wen-Jun Sun, et al. "Observation of localized acoustic skyrmions." Applied Physics Letters 122, no. 2 (2023): 022201. http://dx.doi.org/10.1063/5.0131777.

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Recently, acoustic skyrmions have been explored by tailoring velocity vectorial near-field distributions based on the interference of multiple spoof surface acoustic waves, providing new dimensions for advanced sound information processing, transport, and data storage. Here, we theoretically investigate and experimentally demonstrate that a deep-subwavelength spiral metastructure can also generate the acoustic skyrmion configuration. Analyzing the resonant response of the metastructure and observing the spatial profile of the velocity field, we find that the localized skyrmionic modes correspo

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12

Roudjane, Mourad, Mazen Khalil, Amine Miled, and Younés Messaddeq. "New Generation Wearable Antenna Based on Multimaterial Fiber for Wireless Communication and Real-Time Breath Detection." Photonics 5, no. 4 (2018): 33. http://dx.doi.org/10.3390/photonics5040033.

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Smart textiles and wearable antennas along with broadband mobile technologies have empowered the wearable sensors for significant impact on the future of digital health care. Despite the recent development in this field, challenges related to lack of accuracy, reliability, user’s comfort, rigid form and challenges in data analysis and interpretation have limited their wide-scale application. Therefore, the necessity of developing a new reliable and user friendly approach to face these problems is more than urgent. In this paper, a new generation of wearable antenna is presented, and its potent

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13

Çelik, Ömer Faruk, and Sıddık Cumhur Başaran. "Compact triple-band implantable antenna for multitasking medical devices." Journal of Electrical Engineering 73, no. 3 (2022): 166–73. http://dx.doi.org/10.2478/jee-2022-0022.

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Abstract This paper presents a compact implantable antenna’s design, fabrication, and measurement for biotelemetry applications. The proposed design with the size of 255 mm3 provides a triple-band operation that covers all the Medical Implant Communication Service (MICS: 402 MHz), Medical Device Radiocommunications Service (MedRadio: 405 MHz), and Industrial, Scientific, and Medical (ISM: 433, 915 and 2450 MHz) bands simultaneously. The compact structure with triple- band performance is essentially achieved by using a spiral-like radiator loaded with meandered and internal gear-shaped elements

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14

Wei, Heng, Min Lin, and Yang Xiang. "Compact square spiral printed antenna." Electronics Letters 50, no. 3 (2014): 135–36. http://dx.doi.org/10.1049/el.2013.3784.

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15

Gençoğlan, Duygu Nazan, Şule Çolak, and Merih Palandöken. "Spiral-Resonator-Based Frequency Reconfigurable Antenna Design for Sub-6 GHz Applications." Applied Sciences 13, no. 15 (2023): 8719. http://dx.doi.org/10.3390/app13158719.

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This paper presents a novel frequency reconfigurable antenna design for sub-6 GHz applications, featuring a unique combination of antenna elements and control mechanisms. The antenna is composed of an outer split-ring resonator loaded with an inner spiral resonator, which can be adjusted through the remote control of PIN diode or Single Pole Double Throw (SPDT) switches. The compact antenna, measuring 22 × 16 × 1.6 mm3, operates in broadband, or tri-band mode depending on the ON/OFF states of switches. The frequency reconfigurability is achieved using two BAR64−02V PIN diodes or two CG2415M6 S

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16

Rigelsford, Jonathan M. "A compact stacked Archimedean spiral antenna." Journal of Electromagnetic Waves and Applications 26, no. 17-18 (2012): 2372–80. http://dx.doi.org/10.1080/09205071.2012.734949.

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17

Korkmaz, Erdal, Omer Isik, and Mohammed Ahmed Nassor. "A Compact Microstrip Spiral Antenna Embedded in Water Bolus for Hyperthermia Applications." International Journal of Antennas and Propagation 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/954986.

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This paper presents the design, simulation, fabrication, and measurement of a circular spiral microstrip antenna embedded in distilled water bolus. The antenna is mainly designed to operate at 434 MHz ISM band to be used for a hyperthermia applicator. The performance of the antenna is compared to a conventional patch antenna also embedded in water bolus. The results show that spiral antenna has significant narrower radiation pattern and is capable to operate at multiple frequencies as well. Narrow beam of the antenna is desired to design a multiantenna arrangement with less coupling and a bett

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18

Lu, Jui-Han, and Zi-Hao Liou. "Compact tag antenna for UHF active RFID applications." International Journal of Microwave and Wireless Technologies 9, no. 7 (2017): 1427–32. http://dx.doi.org/10.1017/s1759078716001409.

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By introducing an L-shaped metal plate connecting with the spiral monopole antenna, a planar compact ultra-high-frequency (UHF) tag antenna for radiofrequency identification system is proposed. With the overall antenna size of only 13 × 9 × 1.6 mm3, the proposed tag antenna provides the measured impedance bandwidth of 12 MHz to comply with Taiwan UHF operating band (922–928 MHz). The measured peak gain and antenna efficiency are approximately −1.1 dBi and 27% for Taiwan UHF band, respectively. Meanwhile, the measured reading distance can approach 250 m. Good tag sensitivity is obtained across

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19

Kumar, K., and N. Gunasekaran. "A Compact Multiband Notch UWB Antenna." International Journal of Antennas and Propagation 2012 (2012): 1–5. http://dx.doi.org/10.1155/2012/197945.

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A simple and a compact coplanar waveguide (CPW) ultrawide band (UWB) antenna is presented. Multiband stop function is achieved by two different types of band stop resonators. One is a tilted square spiral slot resonator of different size and length etched on the patch and the other is a coupled resonator etched on the ground plane. These resonators provide considerable increase in notch bandwidth at the stop bands. The proposed antenna has a total size of18×20.3 mm2. The designed antenna achieves pass band performance at 1.8–2.1 GHz (15.38%), 3.0–3.2 GHz (6.45%), 4.4–4.7 GHz (6.59%), 6.3-6.4 G

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20

Li, Xue-Ping, Gang Xu, Chang-Jiao Duan, Ming-Rong Ma, Shui-E. Shi, and Wei Li. "Compact TSA with Anti-Spiral Shape and Lumped Resistors for UWB Applications." Micromachines 12, no. 9 (2021): 1029. http://dx.doi.org/10.3390/mi12091029.

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A novel compact tapered-slot-fed antenna (TSA) with anti-spiral shape and lumped resistors is presented for ultra-wideband (UWB) applications. Unique coplanar waveguide (CPW) to coplanar strip (CPS) feeding structure and exponential slot are designed to ensure the continuous current propagation and good impedance matching. With a pair of anti-spiral-shaped structure loadings at the end of the antenna, the radiation performance in lower operating band can be enhanced obviously. The typical resistor loading technique is applied to improve the time domain characteristics and expand the bandwidth.

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21

Zito, Giuseppe A., Enrico M. Staderini, and Stefano Pisa. "A Twin Spiral Planar Antenna for UWB Medical Radars." International Journal of Antennas and Propagation 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/684185.

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A planar-spiral antenna to be used in an ultrawideband (UWB) radar system for heart activity monitoring is presented. The antenna, named “twin,” is constituted by two spiral dipoles in a compact structure. The reflection coefficient at the feed point of the dipoles is lower than −8 dB over the 3–12 GHz band, while the two-dipoles coupling is about −20 dB. The radiated beam is perpendicular to the plane of the spiral, so the antenna is wearable and it may be an optimal radiator for a medical UWB radar for heart rate detection. The designed antenna has been also used to check some hypotheses abo

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22

Sharma, Satish K., Mukund R. Thyagarajan, Anup N. Kulkarni, and B. Shanmugam. "Frequency reconfigurable compact spiral loaded planar dipole antenna." Microwave and Optical Technology Letters 55, no. 2 (2012): 313–16. http://dx.doi.org/10.1002/mop.27282.

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23

Chen, Min-Hua, Shun-Shi Zhong, Sai-Qing Xu, and Li-Xian Li. "Compact cavity-backed four-arm slot spiral antenna." Microwave and Optical Technology Letters 51, no. 9 (2009): 2141–43. http://dx.doi.org/10.1002/mop.24534.

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24

Ucar, Mustafa Hikmet Bilgehan, and Erdem Uras. "A Compact Modified Two-Arm Rectangular Spiral Implantable Antenna Design for ISM Band Biosensing Applications." Sensors 23, no. 10 (2023): 4883. http://dx.doi.org/10.3390/s23104883.

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This paper presents a new microstrip implantable antenna (MIA) design based on the two-arm rectangular spiral (TARS) element for ISM band (Industrial, Scientific, and Medical 2.4–2.48 GHz) biotelemetric sensing applications. In the antenna design, the radiating element consists of a two-arm rectangular spiral placed on a ground-supported dielectric layer with a permittivity of ϵr = 10.2 and a metallic line surrounding this spiral. Considering the practical implementation, in the proposed TARS-MIA, a superstrate of the same material is used to prevent contact between the tissue and the metallic

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25

Abdullah, Laith Wajeeh, Musa H. Wali, and Adheed H. Saloomi. "Twelfth mode on-demand band notch UWB antenna for underlay cognitive radio." Indonesian Journal of Electrical Engineering and Computer Science 22, no. 3 (2021): 1446. http://dx.doi.org/10.11591/ijeecs.v22.i3.pp1446-1456.

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A wide-slot ultra-wideband (UWB) antenna with on-demand band rejection characteristics that can serve underlay cognitive radio is presented in this paper. This antenna is designed to work in twelve operation modes; one to cover the whole UWB while each of the rest modes excludes one or more of the ranges that are allocated for Worldwide Interoperability for Microwave Access (WiMax), C-band, wireless local area network (WLAN), X-band and International Telecommunication Union (ITU) in a single, dual, triple, quad or penta band rejection state. A spiral shape slot in the patch and three slots mai

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26

Chen, Ling-Lu, Lei Chang, Zhuang-Zhi Chen, and Qiao-Na Qiu. "Bandwidth-Enhanced Circularly Polarized Spiral Antenna With Compact Size." IEEE Access 8 (2020): 41246–53. http://dx.doi.org/10.1109/access.2020.2976705.

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27

Liu, Qing, Cheng-Li Ruan, Lin Peng, and Wei-Xia Wu. "A NOVEL COMPACT ARCHIMEDEAN SPIRAL ANTENNA WITH GAP-LOADING." Progress In Electromagnetics Research Letters 3 (2008): 169–77. http://dx.doi.org/10.2528/pierl08032002.

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28

Joseph, Saira, Binu Paul, Mridula Shanta, and Mohanan Pezholil. "CPW-fed compact UWB spiral antenna for multiband applications." International Journal of Ultra Wideband Communications and Systems 3, no. 2 (2015): 85. http://dx.doi.org/10.1504/ijuwbcs.2015.077111.

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29

Chernobrovkin, Roman, D. Ivanchenko, I. Ivanchenko, N. Popenko, and V. Pishikov. "A compact broadband spiral antenna for millimeter wave applications." Microwave and Optical Technology Letters 56, no. 2 (2013): 293–97. http://dx.doi.org/10.1002/mop.28064.

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30

William, Johnson, Prathamesh Bhat, Mandar Gaonkar, Sai Gaonkar, Surya Khandekar, and Raju Patil. "Design and Analysis of MIMO Spiral Antenna for GPS, WLAN and UAV Applications." European Journal of Engineering Research and Science 4, no. 8 (2019): 130–34. http://dx.doi.org/10.24018/ejers.2019.4.8.1427.

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This paper presents a multiband compact microstrip MIMO antenna for Unmanned Air Vehicle, GPS and WLAN applications. It consists of two symmetric triangular spiral shape patch and defected ground structure (DGS). The antenna is designed using low cost FR4 Substrate and analysed by using commercially available electromagnetic simulation software CST. The simulation results shows the designed antenna has resonance frequencies at 1.62 GHz and bandwidth from1.6027 GHz to 1.6391 GHz, at 2.42 GHz from 2.3609 GHz to 2.4667 GHz and 3.79 GHz from 3.6418 GHz to 3.7909 GHz frequency which covers GPS, WLA

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31

William, Johnson, Prathamesh Bhat, Mandar Gaonkar, Sai Gaonkar, Surya Khandekar, and Raju Patil. "Design and Analysis of MIMO Spiral Antenna for GPS, WLAN and UAV Applications." European Journal of Engineering and Technology Research 4, no. 8 (2019): 130–34. http://dx.doi.org/10.24018/ejeng.2019.4.8.1427.

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This paper presents a multiband compact microstrip MIMO antenna for Unmanned Air Vehicle, GPS and WLAN applications. It consists of two symmetric triangular spiral shape patch and defected ground structure (DGS). The antenna is designed using low cost FR4 Substrate and analysed by using commercially available electromagnetic simulation software CST. The simulation results shows the designed antenna has resonance frequencies at 1.62 GHz and bandwidth from1.6027 GHz to 1.6391 GHz, at 2.42 GHz from 2.3609 GHz to 2.4667 GHz and 3.79 GHz from 3.6418 GHz to 3.7909 GHz frequency which covers GPS, WLA

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32

Zhong, Yong-Wei, Guo-Min Yang, Jing-Yan Mo, and Li-Rong Zheng. "Compact Circularly Polarized Archimedean Spiral Antenna for Ultrawideband Communication Applications." IEEE Antennas and Wireless Propagation Letters 16 (2017): 129–32. http://dx.doi.org/10.1109/lawp.2016.2560258.

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33

Aeini, M., S. Jarchi, and R. Faraji‐Dana. "Compact, wideband‐printed quasi‐Yagi antenna using spiral metamaterial resonators." Electronics Letters 53, no. 21 (2017): 1393–94. http://dx.doi.org/10.1049/el.2017.2149.

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34

Jeong, S. J., and K. C. Hwang. "Compact loop-coupled spiral antenna for multiband wireless USB dongles." Electronics Letters 46, no. 6 (2010): 388. http://dx.doi.org/10.1049/el.2010.3006.

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35

Ahmad, Ashfaq, Farzana Arshad, Syeda Iffat Naqvi, Yasar Amin, Hannu Tenhunen, and Jonathan Loo. "Flexible and Compact Spiral-Shaped Frequency Reconfigurable Antenna for Wireless Applications." IETE Journal of Research 66, no. 1 (2018): 22–29. http://dx.doi.org/10.1080/03772063.2018.1477629.

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36

Ghassemi, N., Ke Wu, S. Claude, Xiupu Zhang, and J. Bornemann. "Compact Coplanar Waveguide Spiral Antenna With Circular Polarization for Wideband Applications." IEEE Antennas and Wireless Propagation Letters 10 (2011): 666–69. http://dx.doi.org/10.1109/lawp.2011.2160976.

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37

Chun-Chih Liu, Pei-Ling Chi, and Yu-De Lin. "Compact Zeroth-Order Resonant Antenna Based on Dual-Arm Spiral Configuration." IEEE Antennas and Wireless Propagation Letters 11 (2012): 318–21. http://dx.doi.org/10.1109/lawp.2012.2191381.

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38

Shih, Ting-Yen, and Nader Behdad. "A Compact, Broadband Spiral Antenna With Unidirectional Circularly Polarized Radiation Patterns." IEEE Transactions on Antennas and Propagation 63, no. 6 (2015): 2776–81. http://dx.doi.org/10.1109/tap.2015.2414476.

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39

Djaiz, A., M. A. Habib, M. Nedil, and T. A. Denidni. "Compact CPW-FED matched dual-band monopole antenna using spiral resonators." Microwave and Optical Technology Letters 52, no. 6 (2010): 1425–27. http://dx.doi.org/10.1002/mop.25218.

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40

Saeidi, Tale, Ahmed Jamal Abdullah Al-Gburi, and Saeid Karamzadeh. "A Miniaturized Full-Ground Dual-Band MIMO Spiral Button Wearable Antenna for 5G and Sub-6 GHz Communications." Sensors 23, no. 4 (2023): 1997. http://dx.doi.org/10.3390/s23041997.

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A detachable miniaturized three-element spirals radiator button antenna integrated with a compact leaky-wave wearable antenna forming a dual-band three-port antenna is proposed. The leaky-wave antenna is fabricated on a denim (εr = 1.6, tan δ = 0.006) textile substrate with dimensions of 0.37 λ0 × 0.25 λ0 × 0.01 λ0 mm3 and a detachable rigid button of 20 mm diameter (on a PTFE substrate εr = 2.01, tan δ = 0.001). It augments users’ comfort, making it one of the smallest to date in the literature. The designed antenna, with 3.25 to 3.65 GHz and 5.4 to 5.85 GHz operational bands, covers the wire

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41

Kaur, Amanpreet. "Semi Spiral G-shaped dual wideband Microstrip Antenna with Aperture feeding for WLAN/WiMAX/U-NII band applications." International Journal of Microwave and Wireless Technologies 8, no. 6 (2015): 931–41. http://dx.doi.org/10.1017/s1759078715000276.

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In this paper, a dual wideband microstrip antenna (MSA) has been presented for wireless local area networks (WLAN), worldwide interoperability for microwave access (Wi MaX) and U-NII band applications. The antenna is designed and simulated using CSTMWS V'10. The main goal of this paper is to get multi-frequency behavior by cutting resonant slots into the patch of the antenna and a wideband antenna behavior using an aperture coupled feeding method. The designed antenna has a semi-spiral G-shaped compact structure and an electromagnetically coupled feeding mechanism (aperture-coupled feeding). I

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42

Jusoh, M., M. F. Jamlos, M. R. Kamarudin, and T. Sabapathy. "A Reconfigurable WiMAX Antenna for Directional and Broadside Application." International Journal of Antennas and Propagation 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/405943.

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A novel reconfigurable compact patch array antenna for directional and broadside application is proposed. The presented antenna has successfully been able to function for directional beam at 320° or 35° and divisive broadside beam at 43° and 330°. This is realized in the unique form of aperture coupled spiral feeding technique and positioning of the radiating elements at 0°, 90,° and 180°. The switchable feature is effectively performed by the configuration of three PIN diodes. All PIN diodes are positioned at the specific location of the aperture coupled structure. It is discovered in simulat

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43

Liu, Longsheng, Yue Li, Zhijun Zhang, and Zhenghe Feng. "Compact helical antenna with small ground fed by spiral‐shaped microstrip line." Electronics Letters 50, no. 5 (2014): 336–38. http://dx.doi.org/10.1049/el.2013.4021.

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44

Khang Nguyen, Truong, Keekeun Lee, Hosung Choo, and Ikmo Park. "A compact spiral stripline-loaded monopole antenna with a vertical ground plane." Microwave and Optical Technology Letters 50, no. 1 (2007): 250–52. http://dx.doi.org/10.1002/mop.23043.

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45

Wu, Chih-Kuang, Tsung-Fu Chien, Chin-Lung Yang, and Ching-Hsing Luo. "Design of Novel S-Shaped Quad-Band Antenna for MedRadio/WMTS/ISM Implantable Biotelemetry Applications." International Journal of Antennas and Propagation 2012 (2012): 1–12. http://dx.doi.org/10.1155/2012/564092.

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A novel S-shaped quad-band planar inverted-F antenna (PIFA) is proposed for implantable biotelemetry in the Medical Device Radiocommunications Service (MedRadio) band (401–406 MHz), Wireless Medical Telemetry Service (WMTS) band (1427–1432 MHz), and industrial, scientific, and medical (ISM) bands (433-434 MHz and 2.4–2.4835 GHz). The proposed antenna reveals compact dimension of 254 mm3(10×10×2.45 mm3) and is composed of three substrates and a superstrate, which are constructed from an S-shaped radiator (layer 1) and two twin radiators of spiral structures (layer 2 and layer 3). The optimal an

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Karimian, Reza, Mansoor Dashti Ardakani, Shahrokh Ahmadi, and Mona Zaghloul. "Human Body Specific Absorption Rate Reduction Employing a Compact Magneto-Dielectric AMC Structure for 5G Massive-MIMO Applications." Eng 2, no. 4 (2021): 501–11. http://dx.doi.org/10.3390/eng2040032.

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A compact artificial magnetic conductor (AMC) structure for the application of specific absorption rate (SAR) reduction is presented in this paper. A magneto-dielectric (MD) structure as a host of AMC substrate is used to miniaturize the AMC size. The magneto-dielectric has been designed with a low-profile spiral loop in a way to have a high permittivity and permeability for the desired center frequency of 3.5 GHz. Simulation results confirm the zero-degree reflection phase of the proposed AMC unit cell. Moreover, a 70% reduction has been achieved in comparison to the conventional AMC. To vali

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Sanyal, Rajarshi, Partha Pratim Sarkar, and Santosh Kumar Chowdhury. "Quasi-self-complementary ultra-wideband antenna with band rejection characteristics." International Journal of Microwave and Wireless Technologies 10, no. 3 (2018): 336–44. http://dx.doi.org/10.1017/s1759078717001106.

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This article presents a compact novel quasi-self-complementary semi-octagonal-shaped antenna for ultra-wideband (UWB) application. The proposed novel structure is fed by a microstrip line where different rectangular truncation is etched to the ground plane as an impedance matching element, which results for much wider impedance bandwidth (VSWR<2) from 2.9 to 20 GHz. In order to obtain band-notched characteristics at 5.5 GHz, an open-ended, quarter wavelength, spiral-shaped stub is introduced in the vicinity of the truncated part of the ground plane. An equivalent circuit model is adopted to

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Beigi, P., J. Nourinia, and Y. Zehforoosh. "Compact CPW-fed spiral-patch monopole antenna with tuneable frequency for multiband applications." Journal of Instrumentation 13, no. 04 (2018): P04014. http://dx.doi.org/10.1088/1748-0221/13/04/p04014.

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Eubanks, Travis Wayne, and Kai Chang. "A Compact Parallel-Plane Perpendicular-Current Feed for a Modified Equiangular Spiral Antenna." IEEE Transactions on Antennas and Propagation 58, no. 7 (2010): 2193–202. http://dx.doi.org/10.1109/tap.2010.2048856.

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Beigi, Payam, Javad Nourinia, Yashar Zehforoosh, and Bahman Mohammadi. "A compact novel CPW-fed antenna with square spiral-patch for multiband applications." Microwave and Optical Technology Letters 57, no. 1 (2014): 111–15. http://dx.doi.org/10.1002/mop.28783.

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