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本文介绍了C波段宽频带低温低噪声放大器的研制.放大器采用的是Avago一款赝高电子迁移率晶体管,用不对称十字型结微带线的输入匹配网络进行宽频带的匹配,采用源极微带线负反馈和输出端串联电阻来提高稳定性.本文介绍的宽频带低温低噪声放大器工作频段为5~6.5GHz,在常温下测量增益为30.7±1dB,输入输出反射损耗均小于-10dB,噪声系数小于1.6dB.在4K的条件下测试,调整放大器的偏置电压后,其增益能达到34.3±1.3dB.
This article describes the development of a C-band wideband low temperature and low noise amplifier using an Avago pseudophase electron mobility transistor with an asymmetric cross junction microstrip line input matching network for broadband matching, using a source Microstrip negative feedback and output series resistance to improve the stability of the broadband low-temperature and low-noise amplifier described in this paper operating frequency range of 5 ~ 6.5GHz, measured at room temperature gain of 30.7 ± 1dB, the input and output reflection losses are less than -10dB , The noise figure is less than 1.6dB. Under the conditions of 4K test, adjust the amplifier bias voltage, the gain can reach 34.3 ± 1.3dB.