BD211: Fast Temperature-Stable Bidirectional Detector for R9 Waveguide

BD211 is a bidirectional detector intended for simultaneous sampling of incident and reflected waves in high-power 900 MHz industrial applications using the R9 (WR975) rectangular waveguide. The bidirectional detector combines the following components:

  • 4-port directional coupler
  • Attenuators
  • Tunnel diode detectors

The detector delivers two well-scaled DC voltages proportional to power of the waves propagating in forward and reverse directions in the parent waveguide.

The use of tunnel diodes provides the bidirectional detector with improved temperature stability and fast pulse response.