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
- 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.