Combination & Joint FittingsChina 600-3800MHz RF Wideband Low Pim Directional Coupler 4.3-10 Female 3dB/5dB/6dB/8dB/10dB/15dB/20dB/30dB/40dB/50dB, Find details about China Directional Coupler, Coupler from 600-3800MHz RF Wideband Low Pim Directional Coupler 4.3-10 Female 3dB/5dB/6dB/8dB/10dB/15dB/20dB/30dB/40dB/50dB