The Anaren XC2100A-20S is a uni-directional RF coupler designed to provide 20.1dB of coupling between an input frequency range of 0.2GHz to 2.3GHz. It is a four-pin Ceramic Surface Mount Device (CSMD) in a T/R package. The XC2100A-20S is designed for a variety of applications including high power signal conditioning, device protection, and power detector applications in 3G, WLAN, WiMAX, and cellular systems. The device is capable of providing 20.1dB of signal coupling with excellent isolation between the input and output, as well as good return loss of the output port for improved performance. This coupler is a suitable choice for improving signal integrity in demanding applications requiring low insertion loss, high isolation, and small size.