Sub-THz U-Slot Coupled Stacked-Patch Radiating Elements for Dual-Polarized MIMO Array Antennas
Paper in proceeding, 2024

Several sub-THz (D-band, 136-148 GHz) dual-polarized array elements (unit cells, UCs) implemented in a multi-layer PCB technology are investigated in the infinite array environment. The elements are stacked-patch antennas with unbalanced aperture-coupled feeds (U-slots), having a slant 45 deg. polarization. We demonstrate that a baseline half-wavelength cavity-backed UC is capable of achieving ≤ 3.7 dB scan loss in the 60 deg. conical scan range and (132-149) GHz bandwidth. For the increased UC size, however, active polarization channel isolation drastically degrades and the element experiences scan blindness. To address this problem, a UC modification is introduced that suggests using a single-row mushroom-type electromagnetic band-gap structure along the UC sidewalls. Simulated results evidence the realized UC decoupling and elimination of the scan-blindness anomalies in the full visible scan range, with scan loss ≤ 4.2 dB in the 55 deg. conical scan range and (136-148) GHz bandwidth.

aperture-coupled patch

dual-polarized antenna array

wide-angle beam steering

sub-THz array antenna


Elena Shepeleva


Artem Vilenskiy

Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks

Gennady Evtyushkin


Anton Lukyanov


18th European Conference on Antennas and Propagation, EuCAP 2024

9788831299091 (ISBN)

18th European Conference on Antennas and Propagation, EuCAP 2024
Glasgow, United Kingdom,

Subject Categories


Signal Processing

Other Electrical Engineering, Electronic Engineering, Information Engineering



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