Model 251-088-030 is a 50 Ohm directional coupler that covers a 500 – 2000 MHz frequency range and features a 30 dB coupling value. The frequency sensitivity is ± 0.75 dB maximum, insertion loss is 0.4 dB maximum, and directivity is 20 dB minimum. Maximum VSWR is 1.25:1, RF input power is 50 Watts average…

An amplifier design from 1936 gets a revival by reducing power consumption in cellular radios.