2cm低噪声波导腔混频器
2cm LOW NOISE FIGURE WAVEGUIDE MIXER
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摘要: 本文研究了影响混频噪声系数的诸因素,提出采用砷化镓肖特基势垒二极管、交叉场混频器和和频回收来实现低噪声混频器。实测的最小噪声系数为5.8dB(包括前中噪声系数1.5dB),最大为7dB。实验结果与理论计算相一致。
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关键词:
Abstract: 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. -
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