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1

Hamid, M. R., P. Gardner, P. S. Hall, and F. Ghanem. "Multimode Vivaldi antenna." Electronics Letters 46, no. 21 (2010): 1424. http://dx.doi.org/10.1049/el.2010.2092.

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2

Naeem, Umair, Amjad Iqbal, Muhammad Farhan Shafique, and Stéphane Bila. "Efficient Design Methodology for a Complex DRA-SIW Filter-Antenna Subsystem." International Journal of Antennas and Propagation 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/6401810.

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This work reports on an efficient design methodology for realizing hybrid filter-antenna subsystems. Designing a filter-antenna subsystem in the case of complex multimode filter is not straightforward. The coupling of the antenna with a multimode filter depends upon several uncorrelated parameters. An efficient design methodology is proposed which can address these complex problems. The work focuses on the characterization of radiating and filtering elements and then proposes a reliable model, which is derived mathematically as well as from rigorous statistical analyses, which can then be used for designing hybrid filter-antenna structures such as a hybrid DRA codesigned with a SIW based multimode filter. A highly compact filter-antenna subsystem has been designed employing the proposed methodology, and the measured results validate the proposed design technique.
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3

Antonino-Daviu, E., M. Cabedo-Fabres, B. Bernardo-Clemente, and M. Ferrando-Bataller. "Printed Multimode Antenna for MIMO Systems." Journal of Electromagnetic Waves and Applications 25, no. 14-15 (2011): 2022–32. http://dx.doi.org/10.1163/156939311798072162.

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4

Klemp, O., and H. Eul. "Radiation Pattern Analysis of Antenna Systems for MIMO and Diversity Configurations." Advances in Radio Science 3 (May 12, 2005): 157–65. http://dx.doi.org/10.5194/ars-3-157-2005.

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Abstract. Multiple-input multiple-output (MIMO) antenna systems and antenna configurations for wideband multimode diversity rank among the emerging key technologies in next generation wireless communication systems. The analysis of such transmission systems usually neglects the influences of real antenna radiation characteristics as well as the influences of mutual coupling in a multielement antenna arrangement. Nevertheless, to achieve a detailed description of diversity gain and channel capacity by using several transmit- and receive antennas in a wireless link, it is essential to take all those effects into account. The expansion of the radiation fields in terms of spherical eigenmodes allows an analytical description of the antenna radiation characteristics and accounts for all the coupling effects in multielement antenna configurations. Therefore the radiation pattern analysis by spherical eigenmode expansion provides an efficient alternative to establish an analytical approach in the calculation of envelope correlation or channel capacity.
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5

Ahmed, Sharif, Tan Kim Geok, Mohamad Yusoff Alias, et al. "A UWB Antenna Array Integrated with Multimode Resonator Bandpass Filter." Electronics 10, no. 5 (2021): 607. http://dx.doi.org/10.3390/electronics10050607.

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This paper presents a novel design of a modified ultrawideband (UWB) antenna array integrated with a multimode resonator bandpass filter. First, a single UWB antenna is modified and studied, using a P-shape radiated patch instead of a full elliptical patch, for wide impedance bandwidth and high realized gain. Then, a two-element UWB antenna array is developed based on this modified UWB antenna with an inter-element spacing of 0.35 λL, in which λL is the free space wavelength at the lower UWB band edge of 3.1 GHz, compared to 0.27 λL of a reference UWB antenna array designed using a traditional elliptical patch shape. The partial ground plane is designed with a trapezoidal angle to enhance matching throughout the UWB frequency range. The mutual coupling reduction of a modified UWB antenna array enhances the reflection coefficient, bandwidth, and realized gain, maintaining the same size of 1.08 λ0 × 1.08 λ0 × 0.035 λ0 at 6.5 GHz center frequency as that of the reference UWB antenna array. The UWB antenna array performance is investigated at different inter-element spacing distances between the radiated elements. To add filtering capability to the UWB antenna array and eliminate interference from the out-of-band frequencies, a multimode resonator (MMR) bandpass filter (BPF) is incorporated in the feedline while maintaining a compact size. The measurement results showed a close agreement with simulated results. The proposed UWB filtering antenna array design achieved a wide fractional bandwidth of more than 109.87%, a high realized gain of more than 7.4 dBi, and a compact size of 1.08 λ0 × 1.08 λ0 × 0.035 λ0 at 6.5 GHz center frequency. These advantages make the proposed antenna suitable for UWB applications such as indoor tracking, radar systems and positioning applications.
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6

Mather, John C., Marco Toral, and Hamid Hemmati. "Heat trap with flare as multimode antenna." Applied Optics 25, no. 16 (1986): 2826. http://dx.doi.org/10.1364/ao.25.002826.

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7

Etellisi, Ehab A., Mohamed A. Elmansouri, and Dejan S. Filipovic. "Wideband Multimode Monostatic Spiral Antenna STAR Subsystem." IEEE Transactions on Antennas and Propagation 65, no. 4 (2017): 1845–54. http://dx.doi.org/10.1109/tap.2017.2670362.

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8

Cheng, Bo, Zhengwei Du, and Daiwei Huang. "A Broadband Low-Profile Multimode Microstrip Antenna." IEEE Antennas and Wireless Propagation Letters 18, no. 7 (2019): 1332–36. http://dx.doi.org/10.1109/lawp.2019.2915963.

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9

Cheng, Bo, Zhengwei Du, and Daiwei Huang. "A Differentially Fed Broadband Multimode Microstrip Antenna." IEEE Antennas and Wireless Propagation Letters 19, no. 5 (2020): 771–75. http://dx.doi.org/10.1109/lawp.2020.2979492.

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10

Patil, Sharanagouda N., and P. V. Hunagund. "Frequency-Reconfigurable Multimode Antenna for Cognitive Radio." Indian Journal of Science and Technology 10, no. 11 (2017): 1–5. http://dx.doi.org/10.17485/ijst/2017/v10i11/111046.

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11

Li, Daotie, and Jun-Fa Mao. "CIRCULARLY ARCED KOCH FRACTAL MULTIBAND MULTIMODE MONOPOLE ANTENNA." Progress In Electromagnetics Research 140 (2013): 653–80. http://dx.doi.org/10.2528/pier13040401.

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12

Li, Daotie, and Jun-Fa Mao. "MULTIBAND MULTIMODE ARCHED BOW-SHAPED FRACTAL HELIX ANTENNA." Progress In Electromagnetics Research 141 (2013): 47–78. http://dx.doi.org/10.2528/pier13050903.

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13

Lobo, J. Alberto. "Hollow sphere: a flexible multimode gravitational wave antenna." Classical and Quantum Gravity 19, no. 7 (2002): 2029–34. http://dx.doi.org/10.1088/0264-9381/19/7/409.

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14

Wang, Hao-Fang, Zheng-Bin Wang, Yong Cheng, and Ye-Rong Zhang. "Dual-polarized lens antenna based on multimode metasurfaces." Chinese Physics B 27, no. 11 (2018): 118401. http://dx.doi.org/10.1088/1674-1056/27/11/118401.

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15

YUAN, ZiLun, YunZhi LI, and Jun LI. "Research and design of multimode GNSS antenna technology." SCIENTIA SINICA Physica, Mechanica & Astronomica 41, no. 5 (2011): 564–67. http://dx.doi.org/10.1360/132011-324.

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16

Liu, Sihao, Deqiang Yang, Yongpin Chen, Kai Sun, Xiaokun Zhang, and Yong Xiang. "Low-Profile Broadband Metasurface Antenna Under Multimode Resonance." IEEE Antennas and Wireless Propagation Letters 20, no. 9 (2021): 1696–700. http://dx.doi.org/10.1109/lawp.2021.3094302.

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17

Yang, Deqiang, Huiling Zeng, Yubo Wen, Meng Zou, and Jin Pan. "Design of Wideband Dual-Polarized Planar Antenna Using Multimode Concept." International Journal of Antennas and Propagation 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/1286398.

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A wideband dual-polarized planar antenna is designed and analyzed by using the theory of characteristic modes (TCM). The eigenvalue, eigencurrent, characteristic pattern, and modal weighting coefficient are analyzed to bring physical insight to this kind of antenna. The results demonstrate that there are two modes resonant in the operating band for each polarization, which have been combined to form a wider frequency band. A bandwidth of 60.2% (1.72–3.2 GHz) for VSWR < 1.5 with high isolation of 32 dB is achieved simultaneously. The size of the radiator structure is 0.33λ0× 0.33λ0× 0.22λ0(λ0refers to the center operating frequency).
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18

Mahatthanajatuphat, Chatree, Thanakarn Suangun, Norakamon Wongsin, and Prayoot Akkaraekthalin. "Triband Operation Enhancement Based on Multimode Analytics of Modified Rhombic Ring Structure with Fractal Ring Parasitic." International Journal of Antennas and Propagation 2019 (October 17, 2019): 1–10. http://dx.doi.org/10.1155/2019/5270206.

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This paper presents a triband operation enhancement based on multimode analytics of a monopole antenna designed by combining a rhombic ring radiator with a strip on a top layer and a fractal ring resonator placed at the bottom layer. The proposed antenna can achieve triband operation to support the modern wireless communication systems. The antenna size is approximately 36 × 52 mm2, which is quite compacted compared with the revised antenna. The simulation and measurement results are in good agreement. The antenna covers the operating bands at 22.22%, 9.8%, and 31.27% at the resonant frequencies of 1.8 GHz, 2.45 GHz, and 3.71 GHz, respectively, to support the application bands of LTE 1800, WLAN IEEE802.11b/g, WiMAX, and IMT Advanced Systems (5G). The average gain of the antenna is about 2 dBi. Also, the radiation patterns are omnidirectional for all operating frequencies.
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19

Yang, Yaohui, Zhiqin Zhao, Wei Yang, Zaiping Nie, and Qing-Huo Liu. "Compact Multimode Monopole Antenna for Metal-Rimmed Mobile Phones." IEEE Transactions on Antennas and Propagation 65, no. 5 (2017): 2297–304. http://dx.doi.org/10.1109/tap.2017.2679059.

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20

Acharjee, J., R. L. Kumar, K. Mandal, and S. K. Mandal. "A Compact Multiband Multimode Antenna Employing Defected Ground Structure." Radioengineering 28, no. 4 (2019): 663–70. http://dx.doi.org/10.13164/re.2019.0663.

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21

Yu, Zhong, Nan Guo, and Jiulun Fan. "Water Spiral Dielectric Resonator Antenna for Generating Multimode OAM." IEEE Antennas and Wireless Propagation Letters 19, no. 4 (2020): 601–5. http://dx.doi.org/10.1109/lawp.2020.2972969.

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22

Meyer, Petrie, and David S. Prinsloo. "Generalized Multimode Scattering Parameter and Antenna Far-Field Conversions." IEEE Transactions on Antennas and Propagation 63, no. 11 (2015): 4818–26. http://dx.doi.org/10.1109/tap.2015.2475642.

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23

Manteuffel, D., and R. Martens. "Compact Multimode Multielement Antenna for Indoor UWB Massive MIMO." IEEE Transactions on Antennas and Propagation 64, no. 7 (2016): 2689–97. http://dx.doi.org/10.1109/tap.2016.2537388.

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24

Rydberg, A., M. Forsgren, H. Brugger, B. Landgraf, and M. Willander. "Multimode operation of antenna integrated microwave quantumwell-diode oscillator." Microwave and Optical Technology Letters 7, no. 2 (1994): 43–45. http://dx.doi.org/10.1002/mop.4650070202.

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25

Yao, Yue, Zhi-Hong Tu, and Zheng Gan. "A tri-band monopole filtering antenna using multimode resonators." Microwave and Optical Technology Letters 59, no. 8 (2017): 1908–13. http://dx.doi.org/10.1002/mop.30638.

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26

Lin, Ding-Bing, Pang-Chun Tsai, I.-Tseng Tang, and Peng-Su Chen. "Spiral and Multimode Antenna Miniaturization for DTV Signal Receptions." IEEE Antennas and Wireless Propagation Letters 9 (2010): 902–5. http://dx.doi.org/10.1109/lawp.2010.2077670.

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27

Junkin, Gary. "A Circularly Polarized Single-Frequency Multimode Helical Beam Antenna." IEEE Transactions on Antennas and Propagation 67, no. 3 (2019): 1459–66. http://dx.doi.org/10.1109/tap.2018.2883652.

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28

Chepala, Anil, Yuan Ding, and Vincent F. Fusco. "Multimode Circular Antenna Array for Spatially Encoded Data Transmission." IEEE Transactions on Antennas and Propagation 67, no. 6 (2019): 3863–68. http://dx.doi.org/10.1109/tap.2019.2905725.

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29

Hu, Wei, Changjiang Li, Xuekang Liu, et al. "Wideband Circularly Polarized Microstrip Patch Antenna With Multimode Resonance." IEEE Antennas and Wireless Propagation Letters 20, no. 4 (2021): 533–37. http://dx.doi.org/10.1109/lawp.2021.3056404.

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30

Zhan, Hua Wei, Cai Xia Guo, Yu Zhang, and Yun Zhou. "A Convenient Designing Method of Feed Network at Low Frequency - The Substructure Method." Applied Mechanics and Materials 29-32 (August 2010): 884–89. http://dx.doi.org/10.4028/www.scientific.net/amm.29-32.884.

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Multimode feed network is an important part of shortwave multimode multifeed antenna system. The design of feed network is a pivotal technique in the process of projecting antenna system. The substructure analyzing method of interconnect-net is based on the substructure matrix database which is formed by converting the net parameters into data. And it characterizes the non-uniform net units through the database directly. Then cascades the known database of the net units by means of ordinary net cascade method, thus performing optimization in the net. In the paper, the Substructure Analyzing Method of Interconnect-net is applied to designing multi-mode multi-feed network, a typical example of multi-mode multi-feed network optimization is given to illustrate the efficiency of the method.
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31

Idris, Izni Husna, Mohamad Rijal Hamid, Kamilia Kamardin, Mohamad Kamal A. Rahim, and Huda A. Majid. "A multiband and wideband frequency reconfigurable slotted bowtie antenna." Indonesian Journal of Electrical Engineering and Computer Science 19, no. 3 (2020): 1399. http://dx.doi.org/10.11591/ijeecs.v19.i3.pp1399-1406.

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A multiband and wideband frequency reconfigurable antenna is presented. A wideband from 3.5 GHz to 9.0 GHz is achieved by introducing one stripline in the middle of a slotted bowtie antenna, whereas multiband is obtained by integrating an additional two slotted arms at the end of bowtie-shaped. As a result, the antenna operated at multiband mode (1.7 GHz and 2.6 GHz) and wideband mode (3.5 GHz to 9.0 GHz) simultaneously. The reconfigurability of the antenna is attained through switches. Five states are achieved with three pairs of switches configurations. All results are presented and discussed, including S11, current distribution, radiation pattern, and gain. The antenna is suitable to be used in multimode communication systems.
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32

Ghaffar, Adnan, Xue Jun Li, Wahaj Abbas Awan, et al. "Design and Realization of a Frequency Reconfigurable Multimode Antenna for ISM, 5G-Sub-6-GHz, and S-Band Applications." Applied Sciences 11, no. 4 (2021): 1635. http://dx.doi.org/10.3390/app11041635.

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This paper presents the design and realization of a compact size multimode frequency reconfigurable antenna. The antenna consists of a triangular-shaped monopole radiator, originally inspired from a rectangular monopole antenna. Slots were utilized to notch the desired frequency while the PIN diodes were utilized to achieve frequency reconfigurability. The antenna can operate in wideband, dual-band, or tri-band mode depending upon the state of the diodes. To validate the simulation results, a prototype was fabricated, and various performance parameters were measured and compared with simulated results. The strong agreement between simulated and measured results along with superior performance as compared to existing works in the literature makes the proposed antenna a strong candidate for ISM, 5G-sub-6 GHz, and S-band applications.
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33

Armbrecht, G., O. Klemp, and H. Eul. "Spherical mode analysis of planar frequency-independent multi-arm antennas based on its surface current distribution." Advances in Radio Science 4 (September 4, 2006): 25–32. http://dx.doi.org/10.5194/ars-4-25-2006.

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Abstract. Deployment in the design of mobile radio terminals focuses on the implementation of multiradio transmission systems, using a multiplicity of different radio standards combined with high-speed data communication over multiple-input multiple-output (MIMO) and multimode diversity techniques. Hence, planar log.-per. four-arm antennas are predistined to meet the requirements of future mobile multiradio RF-frontends and will be introduced and analysed in terms of an efficient spherical mode analysis by means of surface current distribution in order to derive an analytic access to MIMO- and polarisation-diversity performance computation. A remarkable parameter reduction and a faster numerical analysis with respect to conventional techniques may be achieved. The sources in the near-field antenna region are based on the numerical computation of surface currents involving the finite element method (FEM). Relations between the variations of the geometrical antenna parameters and the excitation of discrete spherical modes are presented and will be analysed in detail.
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34

Mourya, Pragati, and Abhinav Bhargava. "A Comparative study of Proximity-Coupled Multiband Microstrip Antenna and Multimode Reduced Surface Wave Antenna." International Journal of Computer Applications 129, no. 12 (2015): 40–43. http://dx.doi.org/10.5120/ijca2015907061.

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35

Heath, R. W., and D. J. Love. "Multimode antenna selection for spatial multiplexing systems with linear receivers." IEEE Transactions on Signal Processing 53, no. 8 (2005): 3042–56. http://dx.doi.org/10.1109/tsp.2005.851109.

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36

Truong, Kien T., and Robert W. Heath, Jr. "Multimode Antenna Selection for MIMO Amplify-and-Forward Relay Systems." IEEE Transactions on Signal Processing 58, no. 11 (2010): 5845–59. http://dx.doi.org/10.1109/tsp.2010.2053364.

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37

Du, Yong-Xing, Huan Liu, Ling Qin, and Bao-Shan Li. "Integrated Multimode Orbital Angular Momentum Antenna Based on RF Switch." IEEE Access 8 (2020): 48599–606. http://dx.doi.org/10.1109/access.2020.2979945.

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38

Park, Chang, and Kwang Lee. "Statistical Multimode Transmit Antenna Selection for Limited Feedback MIMO Systems." IEEE Transactions on Wireless Communications 7, no. 11 (2008): 4432–38. http://dx.doi.org/10.1109/t-wc.2008.060213.

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39

Zhao, Kun, Shuai Zhang, Katsunori Ishimiya, Zhinong Ying, and Sailing He. "Body-Insensitive Multimode MIMO Terminal Antenna of Double-Ring Structure." IEEE Transactions on Antennas and Propagation 63, no. 5 (2015): 1925–36. http://dx.doi.org/10.1109/tap.2015.2408617.

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40

Guan, Dong-Fang, Zu-Ping Qian, Wen-Quan Cao, Lu-Yang Ji, and Ying-Song Zhang. "Compact SIW Annular Ring Slot Antenna With Multiband Multimode Characteristics." IEEE Transactions on Antennas and Propagation 63, no. 12 (2015): 5918–22. http://dx.doi.org/10.1109/tap.2015.2487516.

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41

Wang, Hao-Fang, Zheng-Bin Wang, Zhi-Hang Wu, and Ye-Rong Zhang. "Broadband dual-polarized lens antenna based on multimode Huygens’ surfaces." International Journal of RF and Microwave Computer-Aided Engineering 28, no. 7 (2018): e21458. http://dx.doi.org/10.1002/mmce.21458.

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42

Kim, Jinhyun, Moon-Kyu Cho, and Jeong-Geun Kim. "A multimode phase shifter for S-band phased array antenna." Microwave and Optical Technology Letters 60, no. 8 (2018): 1921–24. http://dx.doi.org/10.1002/mop.31270.

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43

Shindo, Haruo, Takuya Urayama, Takashi Fujii, Yasuhiro Horiike, and Syuitsu Fujii. "Electron Energy Control in Inductively Coupled Plasma Employing Multimode Antenna." Japanese Journal of Applied Physics 38, Part 2, No. 9A/B (1999): L1066—L1069. http://dx.doi.org/10.1143/jjap.38.l1066.

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44

Liu, Hongmei, Shaojun Fang, and Zhongbao Wang. "A Novel Multimode Reduced-Surface-Wave Antenna for GNSS Applications." IEEE Antennas and Wireless Propagation Letters 12 (2013): 1618–21. http://dx.doi.org/10.1109/lawp.2013.2294461.

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45

Zhang, Qianyun, Runbo Ma, Wei Su, and Yue Gao. "Design of a Multimode UWB Antenna Using Characteristic Mode Analysis." IEEE Transactions on Antennas and Propagation 66, no. 7 (2018): 3712–17. http://dx.doi.org/10.1109/tap.2018.2835370.

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46

Mattioni, L., and G. Marrocco. "Design of a broadband HF antenna for multimode naval communications." IEEE Antennas and Wireless Propagation Letters 4 (2005): 179–82. http://dx.doi.org/10.1109/lawp.2005.850796.

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47

Lizzi, L., F. Viani, E. Zeni, and A. Massa. "A DVBH/GSM/UMTS Planar Antenna for Multimode Wireless Devices." IEEE Antennas and Wireless Propagation Letters 8 (2009): 568–71. http://dx.doi.org/10.1109/lawp.2009.2022962.

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48

Mao, Pengrong, and Canguan Gao. "Design of a Multimode OAM Vortex Electromagnetic Microstrip Array Antenna." Journal of Physics: Conference Series 1549 (June 2020): 042127. http://dx.doi.org/10.1088/1742-6596/1549/4/042127.

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49

Borakhade, Deepali, and Sanjay Pokle. "Frequency reconfigurable dual-band MIMO antenna using pentagon slot resonator with improved bandwidth." International Journal of Microwave and Wireless Technologies 10, no. 3 (2017): 383–89. http://dx.doi.org/10.1017/s1759078717001313.

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In this paper, multiple-input–multiple output (MIMO) antenna with dual-band frequency reconfiguration is presented. The proposed antenna consists of two symmetrical pentagon radiating elements. These radiating elements support bands of 1.5 GHz (GPS) and 2.4 GHz (Wi-Fi) frequency. The two PIN diodes are appropriately located on slot line in order to control the current flowing through the radiator. All simulated results are compared and confirmed with measured results. The antenna has VSWR ⩽1.8 and isolation of −28 dB. The advantage of this antenna is that bandwidth is increased by switching of PIN diode in the range from 80 MHz up to maximum 300 MHz. These characteristics demonstrate that proposed antenna is an attractive solution for a multimode application such as GPS, Wi-Fi routers, vehicular communication, etc. where wideband is required.
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50

El Yassini, Abdessalam, Mohammed Ali Jallal, Saida Ibnyaich, Abdelouhab Zeroual, and Samira Chabaa. "A Miniaturized CPW-Fed Reconfigurable Antenna with a Single-Dual Band and an Asymmetric Ground Plane for Switchable Band Wireless Applications." Traitement du Signal 37, no. 4 (2020): 633–38. http://dx.doi.org/10.18280/ts.370412.

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A miniaturized reconfigurable antenna with a hexagonal slot is presented. The motivation of this study is to overcome the problem of switching band antenna with minimum electronic components while designing a miniaturized antenna. The reconfigurable band property has been obtained using only two PIN diodes. The suggested structure has successfully permitted the reconfigurable ability up to three bands of 2.36-2.81 GHz, 3.20-4.23 GHz, and 3.13-5.92 GHz, which well suitable for the standard of the WLAN and WiMAX bands of 5.8/2.4/5.2 GHz and 5.5/2.5/3.5 GHz respectively. The peck gain and efficiency of the reconfigurable antenna at resonant frequencies 2.58, 3.56, 3.58, and 5.63 GHz are 1.48, 1.69, 1.89, 3.44 dBi and 89.60, 87.14, 90.48, 81.57%. The suggested antenna has a compact dimension of 31 × 14.5 mm2. This antenna has a better performance which makes it a good candidate to use in a variety of multimode wireless devices.
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