The AM0520CP-20 from AMCOM Communications, Inc. is a Directional Coupler with Frequency 500 to 20000 MHz, Coupling 20 dB, Coupling Variation ±1.2 dB, Frequency Sensitivity ±0.6 to ±1.8 dB, Directivity 11 to 17 dB. Tags: Module with Connectors. More details for AM0520CP-20 can be seen below.