Wideband Co-Polarized Stacked Patch Antenna for In-Band Full-Duplex Applications

Here, a wideband two-port co-linearly polarized stacked patch antenna is investigated for in-band full-duplex (IBFD) applications. The initial antenna structure is composed of a single patch element and a pair of metallic probes. A mutual coupling dip is visibly observed in the band of interest with...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2023-12, Vol.71 (12), p.9920-9925, Article 9920
Main Authors: Liang, Yu-Zhong, Chen, Fu-Chang, Xiang, Kai-Ran, Zeng, Wen-Feng
Format: Article
Language:English
Subjects:
Antennas
Broadband
Characteristic mode analysis (CMA)
Decoupling
full duplex
Full-duplex system
isolation
Linear polarization
mode cancellation
Mutual coupling
patch antenna
Patch antennas
Probes
Receiving antennas
Slot antennas
Substrates
wideband
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Summary:Here, a wideband two-port co-linearly polarized stacked patch antenna is investigated for in-band full-duplex (IBFD) applications. The initial antenna structure is composed of a single patch element and a pair of metallic probes. A mutual coupling dip is visibly observed in the band of interest without an extra decoupling structure. To further broaden the working and decoupling bandwidths, a stacked patch is introduced to obtain wideband characteristics of the antenna. Two transmission nulls occur in the passband at the same time. Characteristic mode analysis (CMA) is used to elucidate the detailed decoupling mechanism. A proof-of-concept prototype is fabricated and measured. The measured results show that the proposed antenna operates from 3.23 to 4.26 GHz, and the isolation between the two ports is higher than 20 dB over the working band.
ISSN:0018-926X
1558-2221
1558-2221
DOI:10.1109/TAP.2023.3319371