The 1G1304-30 from TTM Technologies is a Directional Coupler with Frequency 800 MHz to 1 GHz, Coupling 30 dB, Coupling Variation +/-1.50 dB, Frequency Sensitivity ±0.10 to 30 dB, Directivity 18 dB. Tags: Surface Mount. More details for 1G1304-30 can be seen below.