ArticleSensors (Basel, Switzerland)2022
Quad-Port Circularly Polarized MIMO Antenna with Wide Axial Ratio.
Article in Sensors (Basel, Switzerland), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- A low profile super UWB- MIMO antenna with d-shaped for satellite communications, 5G and beyond applications.Scientific reports · 2025Article
- Design of a miniaturized dual circularly polarized implantable antenna by using characteristic mode method.Scientific reports · 2024Article
- Quad Element MIMO Antenna for C, X, Ku, and Ka-Band Applications.Sensors (Basel, Switzerland) · 2023Article
- Advances in MIMO Antenna Design for 5G: A Comprehensive Review.Sensors (Basel, Switzerland) · 2023Review
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Authors and funding
2 authors.
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Abstract
This article studies a quad-port multi-input-multi-output (MIMO) circularly polarized antenna with good isolation properties. Using characteristic mode analysis (CMA), the first six distinct modes of the asymmetric square slot with an inverted L-strip are analyzed. In this study, modal parameter extraction is carried out for circular polarization (CP) radiation. A simple annular ring microstrip feed is excited to obtain broadband CP based on CMA. The single-unit feeding structure is replicated orthogonally four times to achieve a CP MIMO antenna. This antenna provides port isolation of more than 21 dB without the use of an additional decoupling element. The quad-port CP-MIMO antenna is simulated with a total dimension of 50 × 50 mm2. The antenna attains impedance matching (S11 < −10 dB) from 5.37 GHz to beyond 11 GHz with an axial ratio bandwidth (ARBW) of 4.65 GHz (5.61 GHz to 10.26 GHz). The peak realized gain of the MIMO antenna is measured at 5.69 dBi at 8.4 GHz. Additionally, the diversity performance parameters of the MIMO structure are computed. The advantages of the proposed structure have been evaluated by comparing it to previously reported MIMO structures. A prototype of the MIMO structure measurements was found to match the simulation results.
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