The A4238-16 from Atlantic Microwave is a Directional Coupler with Frequency 1 to 18 GHz, Coupling 16 dB, Coupling Variation ± 1 dB, Frequency Sensitivity ±0.50 dB, Directivity 12 to 15 dB. Tags: Module with Connectors. More details for A4238-16 can be seen below.