Radiation pattern computation of cavity-backed and probe-fed stacked microstrip patch arrays

Abstract

In this paper, two different methods based on the Floquet's harmonic expansion of the electromagnetic field in halfspace are proposed to determine the active element pattern of infinite planar arrays. They allow us to obtain the radiating characteristics without the limitations of the conventional method from the active reflection coefficient. Both are applied to analyze the scan performance in the case of probe-fed and cavity-backed microstrip arrays from its generalized scattering matrix (GSM), computed previously with a full wave numerical procedure. Numerical results are presented and compared with other techniques.

The Design of Shared Aperture Antennas Consisting of Differently Sized Elements

“…Note that this solution also contributes to the reduction of the mutual coupling between elements. For feeding such radiators, either protruding probes [8], [14], [15] or an aperture coupling [10] have been proposed. While the latter option is generally considered to ensure a wider operational bandwidth, the former provides a better isolation between the channels and a more direct access to individual elements, that is essential for measurement purposes (a highly relevant aspect during the system development phase).…”