[1] Fu Suidao, Cao Zhenxin, Gao Di, Chen Peng, et al. Bandwidth-enhanced dual-polarized antenna with improvedbroadband integrated balun and distributed parasitic element [J]. Journal of Southeast University (English Edition), 2020, 36 (4): 367-375. [doi:10.3969/j.issn.1003-7985.2020.04.001]

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Bandwidth-enhanced dual-polarized antenna with improvedbroadband integrated balun and distributed parasitic element()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

36

Issue:

2020 4

Page:

367-375

Research Field:

Electromagnetic Field and Microwave Technology

Publishing date:

2020-12-20

Info

Title:

Bandwidth-enhanced dual-polarized antenna with improvedbroadband integrated balun and distributed parasitic element

Author(s):

Fu Suidao;  Cao Zhenxin;  Gao Di;  Chen Peng;  Xu Changzhi

School of Information Science and Engineering, Southeast University, Nanjing 210096, China

Keywords:

dual-polarized antenna;  bandwidth enhancement;  integrated balun;  distributed parasitic elements;  impedance matching

PACS:

TN828.6

DOI:

10.3969/j.issn.1003-7985.2020.04.001

Abstract:

A bandwidth-enhanced dual-polarized antenna is proposed for 2/3/4/5G applications, which is composed of distributed parasitic elements(DPEs), a main radiator, two improved broadband integrated baluns and a reflector. First, a novel tooth-shape shorted slot line in the improved broadband integrated balun is analyzed to adjust the input impedance of the antenna. Then, DPEs with 2×2 circular plates loading over the main radiator are proposed to improve broadband impedance matching and radiation pattern. By utilizing impedance compensation of the tooth-shaped shorted slot line and the electromagnetic induction of the DPEs, the antenna achieves an enhanced impedance bandwidth and a stable radiation pattern. To verify these ideas, the bandwidth-enhanced dual-polarized antenna was fabricated and measured. The experimental results indicate that the proposed antenna achieves an operating bandwidth of 72.2%(1.69 to 3.60 GHz)with a return loss(RL)less than -15 dB and a port-to-port isolation(ISO)larger than 30 dB. The antenna obtains a half-power beamwidth(HPBW)within(66±5)° and a gain within(9.0±0.6)dBi in the 2/3/4G bands, and an HPBW within(61.5±2.5)° and a gain within(9.8±0.3)dBi in the 5G band. Across the whole band, the cross-polarization discrimination(XPD)and the front-to-back ratio are both larger than 20 dB.

References:

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Memo

Memo:

Biographies: Fu Suidao(1990—), male, Ph.D. candidate; Cao Zhenxin(corresponding author), male, doctor, associate professor, caozx@seu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.61471117).
Citation: Fu Suidao, Cao Zhenxin, Gao Di, et al. Bandwidth-enhanced dual-polarized antenna with improved broadband integrated balun and distributed parasitic element[J].Journal of Southeast University(English Edition), 2020, 36(4):367-375.DOI:10.3969/j.issn.1003-7985.2020.04.001.

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