Wideband Circularly Polarised Compact MIMO Antenna with Enhanced Isolation for RF Energy Harvesting
Year: 2025
Type: conference-paper
Abstract: A wideband circularly polarised compact MIMO antenna with enhanced isolation for RF energy harvesting is proposed. The antenna realises 42% impedance bandwidth and 1.5% axial ratio bandwidth, with a bandwidth overlap of 0.99. Circular polarisation improvement is achieved through groundplane modification based on characteristic mode analysis, while a plus-shaped decoupling structure mitigates mutual coupling. The MIMO array, composed of four orthogonally oriented radiating elements, ensures broad angular coverage and polarisation diversity. The antenna operates from 4.0 to 7.5 GHz, with diversity performance quantified through envelope correlation coefficient, diversity gain, channel capacity loss, and total active reflection coefficient, demonstrating robust MIMO behaviour.
Language: English
Topic: Antenna Design and Analysis
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7129306932