Dual-feeding microstrip antenna with high isolation

In this Letter, a dual-feeding structure with microstrip and an H-shaped aperture feeding for a microstrip antenna is proposed to achieve high isolation with high gain, easy feeding, and few layers. The measured isolations of the proposed single and 1 × 4-array antenna along the E plane of the aperture feeding are less than −49 and −48 dB, respectively. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 45–47, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10511