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随着卫星通讯、卫星直播电视、微波接力通讯、射电天文、微波遥感等接收技术的发展,研制在常温下获得低噪声的宽频带高频放大器,作为高频放大和高中频前置放大是很重要的.WFB65型双栅场效应放大器,采用三只本所研制的WC54型双栅场效应晶体管,由聚四氟乙烯玻璃纤维介质衬底的微带线电路与分立元件构成,因而它造价低,电路调试技术简单.放大器工作频率为1～1.5千兆赫.噪声系数小于1.5分贝,典型值1.2分贝,最佳值达0.8分贝.小信号增益大于30分贝,带内增益起伏±0.5分贝.1分贝增益压缩点的输出电平大于+6分贝毫瓦.噪声、增益、温度特性的典型曲线见图1和图2.
With the development of receiving technologies such as satellite communication, satellite live television, microwave relay communication, radio astronomy, microwave remote sensing and the like, a wideband high-frequency amplifier with low noise at room temperature is developed. As a high-frequency amplifier and a high-frequency pre-amplifier, Important .WFB65 double gate field effect amplifier, using the three developed WC54 type double gate field effect transistor, made of PTFE fiberglass dielectric substrate microstrip line circuit and discrete components, so it is low cost , Circuit debugging technology is simple.Amplifier operating frequency of 1 ~ 1.5 GHz, the noise figure is less than 1.5 dB, the typical value of 1.2 dB, the best value of 0.8 dB. Small signal gain greater than 30 dB, gain fluctuation ± 0.5 dB .1 The decibel gain compression point output level is greater than +6 dB milliwatts. Typical curves for noise, gain, and temperature characteristics are shown in Figure 1 and Figure 2.