Double-layer suspended stripline resonator with high quality factor for base-station diplexer application

A novel double-layer suspended stripline (DSSL) resonator with high unloaded quality factor is proposed. The DSSL resonator consists of a thin substrate with metal strips on both sides connected by a metallic via hole suspended in the centre of an air-filled cavity, which leads to a much higher unloaded quality factor than the conventional single-layer suspended stripline resonator with an identic...