The X4C55K1-03S from TTM Technologies is a 90° Hybrid Coupler that operates from 5 to 6.3 GHz. This 3 dB coupler can handle a CW input power of up to 10 W with an isolation of more than 23 dB. It has an insertion loss of less than 0.2 dB, an amplitude balance of less than ±0.3 dB, and a phase balance of less than ±4 degrees. This coupler can be used for signal splitting or combining in balanced amplifiers and Doherty power amplifiers, where low insertion loss and tight amplitude and phase balance control are required. It is available in a surface mount package that measures 0.125 x 0.1 inches and is designed for LTE and 5G wireless communication applications.
