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.

Tags: low pass filter