Compact 60-GHz bandpass filters and duplexers on liquid crystal polymer technology

Planar and via-less bandpass filters and duplexers, operating in the V-Band, have been designed and measured. Filters with both symmetric and asymmetric characteristics have been developed that are then combined to realize a duplexer. All these filters have been implemented on low cost liquid crystal polymer technology. The filters exhibit a low insertion loss of 2.5 dB and the isolation between the duplexer ports is better than 25 dB. This is the first report of a V-Band duplexer on organic technology, authenticated with measured results.