Optimized dual-polarized aperture-coupled patch antenna

A dual-polarized L-band microstrip antenna was designed, constructed, and t ested. A new design procedure based on optimizing the orthogonal mode isola tion is demonstrated experimentally to provide highly decoupled feedlines a nd radiated fields with low cross-polarization levels. Isolation between or thogonal ports of less than -36 dB across the operating band is reported. A n impedance match of better than -10 dB over a 1% bandwidth centered around the resonant frequency was achieved. Cross-polarization levels were less t han -40 dB on boresight, and typically less than -35 dB over the entire rad iated field on the resonant frequency. (C) 2000 John Wiley & Sons, Inc.