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The HDL-4-40 from MCLI is a Dual Directional Coupler with Coupling 40 dB, Frequency 0.1 MHz to 1 GHz, Average Power 200 W, Insertion Loss 0.6 dB, Directivity 20 dB. More details for HDL-4-40 can be seen below.
50 dB, 300 W Dual Directional Coupler
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