2cm低噪聲波導(dǎo)腔混頻器
2cm LOW NOISE FIGURE WAVEGUIDE MIXER
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摘要: 本文研究了影響混頻噪聲系數(shù)的諸因素,提出采用砷化鎵肖特基勢(shì)壘二極管、交叉場(chǎng)混頻器和和頻回收來(lái)實(shí)現(xiàn)低噪聲混頻器。實(shí)測(cè)的最小噪聲系數(shù)為5.8dB(包括前中噪聲系數(shù)1.5dB),最大為7dB。實(shí)驗(yàn)結(jié)果與理論計(jì)算相一致。
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關(guān)鍵詞:
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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