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The HDL-8-40 from MCLI is a Dual Directional Coupler with Coupling 40 dB, Frequency 400 MHz to 1 GHz, Average Power 1000 W, Insertion Loss 0.2 dB, Directivity 20 dB. More details for HDL-8-40 can be seen below.
50 dB, 300 W Dual Directional Coupler
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