The APTDC-06-00500200-SMA from AmpliTech, Inc. is a Directional Coupler with Frequency 500 to 2000 MHz, Coupling 6 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.75 to ±1.25 dB, Directivity 18 to 23 dB. Tags: Module with Connectors. More details for APTDC-06-00500200-SMA can be seen below.