The WDNX9+6-DC-8500/10000-26000-40 from Wainwright Instruments is a diplexer with a low passband from DC to 8.5 GHz and a high passband from 10 to 26 GHz. It has an insertion loss of under 1.5 dB, an attenuation of more than 40 dB, and a return loss of over 12 dB. The Diplexer can handle up to 5 watts of power and is available in a module that measures 31 x 18 x 10 mm (plus flanges and connectors).
