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The DDC-30N-3.9G from MegaPhase is a Dual Directional Coupler with Coupling 30 dB, Coupling Variation ±1 dB, Frequency 2.6 to 5.2 GHz, Average Power 300 W, Insertion Loss 0.2 dB. More details for DDC-30N-3.9G can be seen below.
50 dB, 300 W Dual Directional Coupler
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