This low pass filter directional coupler provides a DC voltage at the forward and reflected ports. The test ports feature a broadband equalizer network. The equalizer maintains a constant RF level at the detectors which results in almost the same voltage across the band. This filter has analog devices AD8361 rf detectors which offer 30dB of dynamic range. This is a major imoprovment over the last version which was diode based.
Each filter is carefully tuned with our E5071C s-parameter network analyzer.
- download DXF Drawing
- This LPF requires +5V at 10ma to run the RF detection circuits.
- The metal covers on the detector circuits have holes that allow fine trimming of the detector gain.
- 20dB directivity minimum.