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The HDL-57-50 from MCLI is a Dual Directional Coupler with Coupling 50 dB, Frequency 500 MHz to 3 GHz, Average Power 500 W, Insertion Loss 0.2 dB, Directivity 20 dB. More details for HDL-57-50 can be seen below.
50 dB, 300 W Dual Directional Coupler
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