The AT30D-TE0218-30-AF from Aaren Technology Ltd is a Directional Coupler with Frequency 2 to 18 GHz, Coupling 30 dB, Frequency Sensitivity ±1.0 dB, Directivity 12 dB, Average Power 50 W. Tags: Module with Connectors. More details for AT30D-TE0218-30-AF can be seen below.