Periodically-Stub-Loaded Microstrip Line Wideband Circularly Polarized Millimeter Wave MIMO Antenna

被引：13
作者：
El-Nady, Shaza M. [1 ]
Attiya, Ahmed M. [1 ]
机构：
[1] Elect Res Inst, Cairo 12622, Egypt
来源：
IEEE ACCESS | 2022年 / 10卷
关键词：
Circular polarization; MIMO antenna; stub-loaded microstrip line; DIVERSITY;
D O I：
10.1109/ACCESS.2022.3152222
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper presents a wideband eight-port multiple-input-multiple-output (MIMO) circularly polarized antenna system for mm-wave applications. The proposed antenna element is an L-shape microstrip line with a series fishtail stubs on one side. The spacing between these stubs is adjusted to be a guided wavelength at the center frequency. These fishtail stubs are used to cancel the anti-phase magnetic currents to enhance the radiated fields from the microstrip line. A 90 degrees phase difference between the fields of the two arms of the L-shape is obtained by shifting the feeding point from the center of the corner by one eighth guided wavelength. This 90 degrees phase difference introduces the required circular polarization. The proposed antenna covers the frequency range from 27.5 up to 31 GHz, which is suitable for mm-wave N261 5G-band which cover the range from 27.5 to 28.35 GHz. These antenna elements are arranged on the four corners of a rectangular substrate to configure the proposed MIMO antenna system. Different parameters of this MIMO antenna are investigated by using numerical simulation and verified by experimental results.
引用
收藏
页码：20465 / 20472
页数：8
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