The APTDC-10-06001800-SMA from AmpliTech, Inc. is a Directional Coupler with Frequency 6 to 18 GHz, Coupling 10 dB, Coupling Variation ±1.25 dB, Frequency Sensitivity ±0.30 to ±1 dB, Directivity 12 to 15 dB. Tags: Module with Connectors. More details for APTDC-10-06001800-SMA can be seen below.