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The HDL-58-20 from MCLI is a Dual Directional Coupler with Frequency 1 to 500 MHz, Coupling 20 dB, Frequency Sensitivity 1 dB, Directivity 20 dB, Insertion Loss 1.2 dB. Tags: Dual Directional Coupler. More details for HDL-58-20 can be seen below.
50 dB, 300 W Dual Directional Coupler
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