Study of feedback technology for gain flatness of UWB LNA

摘要：

The S parameter expression of the HBT with multiple feedbacks, especial the transmission gain S21, is presented and analyzed. Pure resistive feedback makes better input and output matching. Reactive feedback promotes the amplitude of S21 as the frequency increases, which compensates the inherent decrease of HBT’s gain in high frequency. The gain decrease induced by the resistive feedback is also counteracted. So the gain flatness is realized in the frequency band from 3.1GHz to 10.6GHz.

关键词： Low noise amplifier Reactive feedback Negative feedback Ultra-wideband

作者: Hongyun Xie Wanrong Zhang Jia Li Pei Shen Yiwen Huang Lu Huang Ning Hu

作者单位: College of Electronic Information and Control Engineering,Beijing University of Technology,Beijing, China

会议类型: 国际会议

会议名称: 2009 3rd IEEE International Symposium on Microwave,Antenna,Progagation and EMC Technologies for Wireless Communications(第三届微波、天线、电波传播和EMC技术国际会议

会议地点: 北京

会议语种:英文

页码: 480-483

在线出版日期: 2009-10-27（万方平台首次上网日期，不代表论文的发表时间）