2cm LOW NOISE FIGURE WAVEGUIDE MIXER
2cm低噪声波导腔混频器

The factors affecting the mixer noise figure are examined. A low noise figure mixer is ahieved by means of GaAs Schottky barrier diode, the cross field mixer structure and recovering the sum frequency. The measured SSB overall noise figure (including IF amplifier noise figure 1.5 dB) is 5.8 dB. It is in agreement with the theoretical calculation.