Wideband Circularly Polarized Two-Element MIMO Antenna with Polarization Diversity
Year: 2024
Type: article
Abstract: This paper introduces a wideband MIMO (multiple input multiple output) antenna operating Sub 6 GHz 5G frequency band with circular polarization (CP). It comprises two identical printed monopole antennas (PMAs) with disconnected ground planes, spaced at$0:051 \lambda_{0}$($\lambda_{0}$is a free-space wavelength at lowest frequency). An inverted U-shaped parasitic element reduces the mutual coupling and improves the axial ratio (AR), while a substrate cavity reflector is installed to be completely CP antenna and increase the absolute gain in the boresight direction. The proposed antenna achieves a measured 10dB impedance and 3dB AR bandwidth of 46.58% (3.03 - 4.95 GHz) with a maximum gain of 5.39 dBic. Notably, polarization in the far-field can be switched between right-hand circular polarization (RHCP) and left-hand circular polarization (LHCP) by changing the exciting port. Experimental measurements validate the antenna's performance within the desirable frequency range.
Source: IEICE Communications Express
Authors: Zin Mar Phyo, Takafumi Fujimoto, Chai-Eu Guan
Institution: Nagasaki University
Language: English
Topic: Antenna Design and Analysis
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4402402303