Abstract
A general full-wave solution to arbitrary multilayer geometries of printed antennas and arrays coupled to multiple printed feed lines has been developed. It uses spectral-domain Green's functions for multilayer substrates to account for the substrate layering of the printed antenna, and a newly developed generalized multiport reciprocity analysis to treat the coupling of the transmission feed lines to the antenna elements. The analysis is completely rigorous, including all surface wave or other non-radiating modal effects. The solution has been developed for both isolated elements as well as infinite arrays. The theoretical formulation of the generalized multiport reciprocity analysis is described in details and results for several practical examples are presented to demonstrate the accuracy and versatility of the analysis used. Considering the rigor and versatility of the analysis, it should find useful for full-wave simulation and computer aided design of a variety of multilayered printed phased-array configurations.
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