The CSDZ-20SH-1.1G from Crane Aerospace & Electronics is a Directional Coupler with Frequency 960 to 1220 MHz, Coupling 20 dB, Coupling Variation ±0.5 dB, Frequency Sensitivity ±0.30 dB, Directivity 20 dB. Tags: Surface Mount. More details for CSDZ-20SH-1.1G can be seen below.