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The 1137-C40 from TRM Microwave is a Dual Directional Coupler with Frequency 10 to 100 MHz, Coupling 40 dB, Coupling Variation ± 0.5 dB, Directivity 20 dB, Insertion Loss 0.2 dB. More details for 1137-C40 can be seen below.
50 dB, 300 W Dual Directional Coupler
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