The A4248-20 from Atlantic Microwave is a Directional Coupler with Frequency 2 to 18 GHz, Coupling 20 dB, Coupling Variation ± 1 dB, Frequency Sensitivity ±0.50 dB, Directivity 12 to 15 dB. Tags: Module with Connectors. More details for A4248-20 can be seen below.