The APTDC-30-06001800-SMA from AmpliTech, Inc. is a Directional Coupler with Frequency 6 to 18 GHz, Coupling 30 dB, Coupling Variation ±2 dB, Frequency Sensitivity ±0.5 to ±1.5 dB, Directivity 11 to 14 dB. Tags: Module with Connectors. More details for APTDC-30-06001800-SMA can be seen below.