Capable of passing dc and handling high-frequency power levels to 200 W for signals from 225 to 450 MHz, the model MBDA-30-451HP 50-Ω bidirectional coupler offers low loss and high directivity. This compact 30-dB coupler features mainline insertion loss of only 0.15 dB and directivity of 28 dB. Typical input and output return loss is 30 dB. Typical coupling flatness is ±0.85 dB, with worst-case coupling flatness of ±1 dB. Well-suited for use in VHF and UHF radios for antenna feeds and with high-power amplifiers, the miniature coupler operates over a temperature range of −55 to +105°C. It measures just 1.0 × 1.0 × 0.051 in.
Mini-Circuits, P.O. Box 350166, Brooklyn, NY 11235-003; (718) 934-4500