DD111: Fast Temperature-Stable Directional Detector for R26 Waveguide

DD111 is a small-housing directional detector intended for sampling pulse-modulated incident or reflected waves in high-power 2450 MHz industrial applications using R26 (WR340) rectangular waveguides.

The detector delivers well-scaled DC voltage proportional to the power of the wave propagating in one direction in the main waveguide.

Simple reversing the DD111 causes it to sample the wave propagating in the opposite direction.

The use of a tunnel diode provides the directional detector with improved temperature stability and fast pulse response.

Specifications
Frequency Range 2425 – 2475 MHz
Directivity 25 dB min
Statistical spread of output voltage ±1 dB (3-σ deviation)
Polarity Negative
Temperature variation of output voltage < 0.5 dB in 5 to 65°C range
DC output connector SMAf
Waveguide of Destination R26 (WR340), wall thickness 2 mm