A highly compact Fabry Perot cavity-based MIMO antenna with decorrelated fields

M Umair Illahi; Muhammad U Khan; Rifaqat Hussain; Farooq A Tahir

doi:10.1038/s41598-022-18050-w

A highly compact Fabry Perot cavity-based MIMO antenna with decorrelated fields

Sci Rep. 2022 Aug 18;12(1):14021. doi: 10.1038/s41598-022-18050-w.

Authors

M Umair Illahi¹, Muhammad U Khan¹, Rifaqat Hussain², Farooq A Tahir³

Affiliations

¹ School of Electrical Engineering and Computer Science, National University of Sciences and Technology (NUST), Islamabad, Pakistan.
² Department of Electrical Engineering, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia.
³ School of Electrical Engineering and Computer Science, National University of Sciences and Technology (NUST), Islamabad, Pakistan. farooq.tahir@seecs.edu.pk.

Abstract

This work presents the design of a low profile Fabry-Perot cavity-based multiple-input-multiple-output antenna with low correlation coefficient. The fields of closely placed antenna elements are tilted by using a phase-gradient partially reflective surface (PRS), thereby decreasing the correlation coefficient. The PRS is designed in such a way that its reflection phase is complementary to that of the ground plane. The PRS decorrelates the fields of the two radiating elements when placed at a height of λ/10 above them resulting in a reduction of the correlation coefficient by almost 95% for an isotropic environment. This height is considerably less than λ/4, which has been reported previously.