Dual-Band Differential Shifted-Feed Microstrip Grid Array Antenna With Two Parasitic Patches

A dual-band differential shifted-feed microstrip grid array antenna (DSF-MGAA) with two parasitic patches is presented in this communication. By moving the feed location, a conventional MGAA (C-MGAA) can be turned into an SF-MGAA for dual-band operation. The high-frequency band of SF-MGAA correspond...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2020-03, Vol.68 (3), p.2434-2439
Main Authors: Xu, Guanghui, Peng, Hong-Li, Shao, Zijian, Zhou, Liang, Zhang, Yueping, Yin, Wen-Yan
Format: Article
Language:English
Subjects:
Antenna arrays
Antenna measurements
Antennas
Bandwidth
Bandwidths
Differential feeding
Dual band
Frequency measurement
Impedance
Low frequencies
Microstrip antenna arrays
Microstrip antennas
microstrip grid array antenna (MGAA)
Parasitic elements (antennas)
parasitic patch
Patch antennas
Resonant frequency
Wireless communications
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Summary:A dual-band differential shifted-feed microstrip grid array antenna (DSF-MGAA) with two parasitic patches is presented in this communication. By moving the feed location, a conventional MGAA (C-MGAA) can be turned into an SF-MGAA for dual-band operation. The high-frequency band of SF-MGAA corresponds to the operation mode of the C-MGAA, and its low-frequency band is similar to that of the patch or meshed patch antenna. A new differential feeding scheme and two parasitic patches are adopted to improve the impedance bandwidth of SF-MGAA. The proposed DSF-MGAA can cover a dual band of 3.7 and 28.5 GHz. The measured -10 dB impedance bandwidths of 3.4% and 4.5%, which correspond to the peak gains of 8.98 and 19.2 dBi, are obtained in the low- and high-frequency bands, respectively. The DSF-MGAA can be a potential candidate for the future dual-band wireless communication.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2019.2943409