Design and analysis of ultra-wideband decoupling structure based on
polarisation mismatch
Abstract
In this work, a polarization rotating surface is designed and analyzed
and applied to the decoupling of ultra-wideband antennas. A method of
using dual-size combined rings is proposed to expand the operating
bandwidth to 4.8GHz–18.2GHz, and the polarization conversion rate
within the entire bandwidth is higher than 99%. Based on the principle
of polarization mismatch, placing the polarization rotating surface
between ultra-wideband antennas for decoupling can reduce the coupling
between antennas by an average of 20dB within the operating bandwidth.
Simulation and experimental results consistently prove its excellent
decoupling capabilities and ultra-wide operating bandwidth.