ANALYSIS OF 2 APERTURE-COUPLED CAVITY-BACKED ANTENNAS

The feasibility and performance of an aperture-coupled cavity-fed micr ostrip patch antenna and an aperture-coupled cavity antenna are demons trated using reciprocity and moment method analyses, followed by pract ical design guidelines and equivalent circuit models, Each antenna inc orporates a thick ground plane that can be useful as a heat sink for a ctive MMIC circuitry and as structural support for thin substrates, Pr ototype antennas show good experimental agreement with the analyses in each case, The resonators of the aperture-coupled cavity-fed patch an tenna are optimized to achieve a prototype having a measured 2:1 bandw idth of 26%, The size of the aperture-coupled cavity antenna can be ea sily reduced for array applications by filling the cavity with a diele ctric material.