BD111: Fast Temperature-Stable Bidirectional Detector for WR340 Waveguide

BD111 is a bidirectional detector intended for simultaneous sampling of incident and reflected waves in high-power 2450 MHz industrial applications using an WR340 (R26) rectangular waveguide. The bidirectional detector combines the following components:

  • 4-port directional coupler (70-dB coupling)
  • Attenuators
  • Tunnel diode detectors

The detector delivers well-scaled DC voltages proportional to power of the waves propagating in forward and reverse directions in the main 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 and fast pulse response.

Transfer Curve (f = 2450 MHz, RLOAD = 33 kΩ, TA = 25°C)