Jan Claudio / Dr. Rafael Medina


This poster outlines a methodology for designing feed networks for single and dual-polarized aperture-coupled microstrip patch (ACMP) antennas with dual-offset microstrip feedlines. The challenge to be addressed is matching the antenna effective impedance (Zeff) to the feedline, which is an area with limited literature. This study demonstrated that ACMP antennas can be coupled to dual-offset feedlines with λ/4 transformers and T-junctions with infinite combinations of impedance for the λ/4 transformer [1], [2]. Equations were developed to relate the effective impedance to the feed geometry, allowing the design of the patch antenna's feedlines. Using this approach, two ACMP antennas, with single and dual-polarization, were designed and implemented obtaining satisfactory impedance matching.