A Filtering Patch Antenna With Reconfigurable Quad-Polarization Diversity

This paper presents a filtering patch antenna with reconfigurable quad-polarization diversity. By loading parasitic patches and a Jerusalem-cross-shaped metal strip on a patch antenna, two radiation nulls are introduced to realize frequency selectivity. Then, to achieve reconfigurability, a feeding...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2024-03, Vol.71 (3), p.1-1
Main Authors: Sun, Yiqing, Lin, Feng, Zhao, De Hao, Zhai, Zhen Jun, Sun, Hou Jun, Zhang, Xiu Yin
Format: Article
Language:English
Subjects:
Antenna arrays
Antenna feeds
Antennas
Bandwidths
Filtering
Filtering antenna
Filtration
Gain
Horizontal polarization
Metal strips
Metals
Parasitic elements (antennas)
Patch antennas
PIN diodes
quad-polarization
radiation nulls
reconfigurable device
Reconfiguration
Switches
Vertical polarization
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Summary:This paper presents a filtering patch antenna with reconfigurable quad-polarization diversity. By loading parasitic patches and a Jerusalem-cross-shaped metal strip on a patch antenna, two radiation nulls are introduced to realize frequency selectivity. Then, to achieve reconfigurability, a feeding network with four switchable output modes is proposed. By switching the PIN diodes, the antenna realizes vertical linear-polarized (V-LP), horizontal linear-polarized (H-LP), left-hand circular-polarized (LHCP) and right-hand circular-polarized (RHCP) radiations while maintaining its intrinsic filtering characteristic. A prototype operating at 2.28 GHz is fabricated, and the measured 10-dB overlapped bandwidth of the four polarization states is 5.7%. The peak gains for the four states are higher than 6.65 dBi, and the overlapped 3-dB AR bandwidth is 7.89%.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2023.3327000