The SH20557 from Sigatek is a 180 Degree Hybrid Coupler that operates from 1 to 26.5 GHz. This 3 dB coupler has an insertion loss of under 4.5 dB, isolation of over 16 dB and can handle an input power of up to 20 watts. It has a low VSWR with good amplitude and phase balance. The coupler is available in a module with SMA connectors.