Microstrip diplexer design for X-band RF/microwave front-end applications

This paper presents a microstrip diplexer operating at 9.79 and 11.47 GHz. The proposed diplexer consists of two parallel coupled line band-pass filters (BPFs) designed using a randomly defined image impedance technique. Thus, suitable coupled line gap distance can be obtained for conventional wet-etching fabrication. This allows easy design and fabrication… (More)