This low pass filter directional coupler uses voltage doubler diode detectors to provide a DC voltage at the forward and reflected test ports. This coupler is ideally suited for VSWR protection circuits.
Filter Specifications
86-110MHz 1000 watts maximum.
9th order Chebyshev typology.
Ultra low loss Teflon PCB; tightly controlled dielectric constant.
large #8 awg inductors.
0.12 dB insertion loss maximum; 0.1dB typical.
-28dB return loss; -33dB typical.
-47dB rejection at 176MHz. That's the 1st harmonic of 88MHz
Directional Coupler Specifications
Directivity: 25dB typical
Detector output level: 2.5 volts max at 108MHz, 1000W.
Detector typology: Voltage doubler schottky detector.
