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本文介绍了我们研制的１０ｃｍ波段和２２ｃｍ波段微带平衡混频器，其中２２ｃｍ波段混频器的噪声系数是ＮＦ≤６ｄｂ：隔离比是Ｄ≥２０ｄｂ；信号支路的驻波比是 ＜１．５。Ｓ波段混频器的噪声系数是ＮＦ≤７ｄｂ；隔离比是Ｄ≥１７ｄｂ；信号支路的驻波比是 ≤１．６。为了进一步改善混频器特性，我们将电桥做成圆形，并且将其两输出臂之一增长了四分之一波长。（混频器的噪声系数内包括了中放级的噪声系数ＮＦｉｉ≈１．５ｄｂ）．
In this paper, we introduce the 10cm band and 22cm band microstrip balanced mixer, in which 22cm band mixer noise factor is NF ≤ 6db: the isolation ratio is D ≥ 20db; signal branch VSWR is <1. 5. The noise figure of the S-band mixer is NF <7db; the isolation ratio is D> 17db; the standing wave ratio of the signal branch is <1.6. To further improve the mixer characteristics, we made the bridge circular and increased one of its two output arms by a quarter of a wavelength. (The noise figure of the mixer includes the noise figure NFii≈1.5db in the mid-level).