The CE10-1R520T from Marki Microwave is a Directional Coupler with Frequency 1.5 to 20 GHz, Coupling 9.5 to 10.5 dB, Coupling Variation ±0.85 to ±1.7 dB, Amplitude Flatness ±0.25 to ±0.5 dB, Directivity 20 to 32 dB. Tags: Module with Connectors. More details for CE10-1R520T can be seen below.