BD131B: Temperature-Stable Bidirectional Detector for R22 Waveguide, with DC Amplifiers

BD131B is a bidirectional detector intended for simultaneous sampling of incident and reflected waves in high-power 2450 MHz industrial applications using an R22 (WR430) rectangular waveguide. The bidirectional detector combines the following components:

  • 4-port directional coupler
  • Attenuators
  • Tunnel diode detectors
  • Low noise operational amplifiers

The unit delivers two DC voltages in the range 0 to approximately 9 V. The voltages are functions of the powers associated with waves propagating in opposite directions in the parent waveguide. Standard maximum working powers Pmax are 1 kW, 10 kW and 30 kW.

The use of tunnel diodes provides the bidirectional detector with improved temperature stability.

BD131B Bidirectional Detector (BD132B shown)