Monostatic copolarized simultaneous transmit and receive (STAR) antenna by integrated single-layer design

Ziheng Zhou; Yue Li; Jiadong Hu; Yijing He; Zhijun Zhang; Pai Yen Chen

doi:10.1109/LAWP.2019.2894418

Monostatic copolarized simultaneous transmit and receive (STAR) antenna by integrated single-layer design

Ziheng Zhou, Yue Li^*, Jiadong Hu, Yijing He, Zhijun Zhang, Pai Yen Chen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

In this letter, a monostatic and cochannel simultaneous transmit and receive (STAR) antenna with identical circularly polarized radiations of transmitting (TX) and receiving (RX) channels is designed using a thin single-layer substrate. Four concentrically arranged microstrip radiating elements are properly excited by two sets of feeding networks: the feeding network of transmitting antenna (FNT) and the feeding network of receiving antenna (FNR). To fit FNT and FNR into the same plane, the FNR consists of a compact sequential-phase structure placed at the center of the antenna, while the FNT is aligned along the side with a planar crossover junction armed. Two vital techniques, orthogonal feeding points and leakage signal cancellation based on feeding networks, are utilized for satisfactory isolation level between the TX and RX ports. The experiment results demonstrate an isolation at least 41 dB and up to 54 dB, an axial ratio better than 1.7 dB, and a realized gain of 7.2 ∼ 10.5 dBic in the 2.4 GHz WLAN band. Our design scheme may overcome the profile and cost limitations of bulky multilayered STAR antennas, and thus portends potential for the highly integrated inband duplex systems.

Original language	English
Article number	8620521
Pages (from-to)	472-476
Number of pages	5
Journal	IEEE Antennas and Wireless Propagation Letters
Volume	18
Issue number	3
DOIs	https://doi.org/10.1109/LAWP.2019.2894418
Publication status	Published - Mar 2019
Externally published	Yes

Keywords

Antenna array feed
Circular polarization
Monostatic
Simultaneous transmit and receive (STAR) antennas
Single layer

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10.1109/LAWP.2019.2894418

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title = "Monostatic copolarized simultaneous transmit and receive (STAR) antenna by integrated single-layer design",

abstract = "In this letter, a monostatic and cochannel simultaneous transmit and receive (STAR) antenna with identical circularly polarized radiations of transmitting (TX) and receiving (RX) channels is designed using a thin single-layer substrate. Four concentrically arranged microstrip radiating elements are properly excited by two sets of feeding networks: the feeding network of transmitting antenna (FNT) and the feeding network of receiving antenna (FNR). To fit FNT and FNR into the same plane, the FNR consists of a compact sequential-phase structure placed at the center of the antenna, while the FNT is aligned along the side with a planar crossover junction armed. Two vital techniques, orthogonal feeding points and leakage signal cancellation based on feeding networks, are utilized for satisfactory isolation level between the TX and RX ports. The experiment results demonstrate an isolation at least 41 dB and up to 54 dB, an axial ratio better than 1.7 dB, and a realized gain of 7.2 ∼ 10.5 dBic in the 2.4 GHz WLAN band. Our design scheme may overcome the profile and cost limitations of bulky multilayered STAR antennas, and thus portends potential for the highly integrated inband duplex systems.",

keywords = "Antenna array feed, Circular polarization, Monostatic, Simultaneous transmit and receive (STAR) antennas, Single layer",

author = "Ziheng Zhou and Yue Li and Jiadong Hu and Yijing He and Zhijun Zhang and Chen, {Pai Yen}",

note = "Publisher Copyright: {\textcopyright} 2018 IEEE.",

year = "2019",

month = mar,

doi = "10.1109/LAWP.2019.2894418",

language = "English",

volume = "18",

pages = "472--476",

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AU - Zhou, Ziheng

AU - Li, Yue

AU - Hu, Jiadong

AU - He, Yijing

AU - Zhang, Zhijun

AU - Chen, Pai Yen

PY - 2019/3

Y1 - 2019/3

N2 - In this letter, a monostatic and cochannel simultaneous transmit and receive (STAR) antenna with identical circularly polarized radiations of transmitting (TX) and receiving (RX) channels is designed using a thin single-layer substrate. Four concentrically arranged microstrip radiating elements are properly excited by two sets of feeding networks: the feeding network of transmitting antenna (FNT) and the feeding network of receiving antenna (FNR). To fit FNT and FNR into the same plane, the FNR consists of a compact sequential-phase structure placed at the center of the antenna, while the FNT is aligned along the side with a planar crossover junction armed. Two vital techniques, orthogonal feeding points and leakage signal cancellation based on feeding networks, are utilized for satisfactory isolation level between the TX and RX ports. The experiment results demonstrate an isolation at least 41 dB and up to 54 dB, an axial ratio better than 1.7 dB, and a realized gain of 7.2 ∼ 10.5 dBic in the 2.4 GHz WLAN band. Our design scheme may overcome the profile and cost limitations of bulky multilayered STAR antennas, and thus portends potential for the highly integrated inband duplex systems.

AB - In this letter, a monostatic and cochannel simultaneous transmit and receive (STAR) antenna with identical circularly polarized radiations of transmitting (TX) and receiving (RX) channels is designed using a thin single-layer substrate. Four concentrically arranged microstrip radiating elements are properly excited by two sets of feeding networks: the feeding network of transmitting antenna (FNT) and the feeding network of receiving antenna (FNR). To fit FNT and FNR into the same plane, the FNR consists of a compact sequential-phase structure placed at the center of the antenna, while the FNT is aligned along the side with a planar crossover junction armed. Two vital techniques, orthogonal feeding points and leakage signal cancellation based on feeding networks, are utilized for satisfactory isolation level between the TX and RX ports. The experiment results demonstrate an isolation at least 41 dB and up to 54 dB, an axial ratio better than 1.7 dB, and a realized gain of 7.2 ∼ 10.5 dBic in the 2.4 GHz WLAN band. Our design scheme may overcome the profile and cost limitations of bulky multilayered STAR antennas, and thus portends potential for the highly integrated inband duplex systems.

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KW - Single layer

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Monostatic copolarized simultaneous transmit and receive (STAR) antenna by integrated single-layer design

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