Loss reduction techniques and layout design consideration for planar integrated RF feeds

Abstract

Layout design techniques are examined in order to reduce potential radiation loss of feed circuits. Hybrid mode method of moments (MoM) is used to characterize microstrip discontinuities such as bends, steps and T-junctions that are building blocks in a planar integrated RF feed. It includes frequency dispersion, radiation and leakage losses. The equivalent circuit of these elements can be obtained by applying our newly proposed parameter extraction technique. With databases generated from the field-theoretical model, some design guidelines are presented and discussed for any potential loss reduction schemes. Results are given, indicating the importance of adverse effects due to dispersion and losses in the design of low-loss and compact RF feed.