The 7HSX-18G/40G-K11 from Reactel is a wideband bandpass filter with a passband from 18 GHz to 40 GHz. It has an insertion loss of less than 2 dB, an attenuation of more than 30 dB and a VSWR under 2.5:1. It is available with Type K female connectors and measures 0.5 x 0.5 x 1.0 inches. This filter is ideal for portable or “hi-rel” applications.