Quantic PMI Model QC-052-YR3 is a 3 dB, 90° Quadrature Coupler that operates over the 0.5 to 2 GHz frequency range and when a signal is applied to any port will split equally between the ports on the other side with the adjacent port remaining isolated. The Phase relationship is 0° to the port directly opposite and -90° to the port on the diagonal. Housing size is 1.45" x 0.75" x 0.22" with SMA female connectors.