应用于匹配网络的负阻抗变换器研究  

Study on Negative Impedance Converter Used in Matching Network

作　　者：曹卫平[1] 梁兴东[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,桂林541004

出　　处：《微波学报》2012年第4期85-87,96,共4页Journal of Microwaves

基　　金：国家自然科学基金项目(61071018)

摘　　要：根据非福斯特电路的负阻抗变换特性,研究了有源宽带匹配网络。采用晶体管设计负阻抗变换器(NIC),结合传输矩阵对电路进行了分析。通过仿真和实验测试实现了在10～100MHz频率范围内的负电抗变换,其中20～60MHz频率范围内转换效率大于90%,测试结果与模拟结果基本一致,验证了负阻抗变换器的可行性和有效性。利用该电路结构能够对电小天线进行宽带匹配,提高天线的工作带宽和辐射性能。The active broadband matching circuit is studied in this paper according to the property of non-Foster cir-cuits negative impedance transformation. Analysis of the circuit is conducted with the application of transistor in NIC design, and in combination of the transmission matrix. The negative reactance converter is achieved within 10 - 100MHz frequency range by simulation and experiment. It shows a 90% efficient within 20 N 60MHz frequency. The experiment result is gener- ally consistent with the simulation result and verifies NIC＇s feasibility and validity. Network with such structural design could be applied to the broadband matching for electrically small antennas, thus to enhance the bandwidth and radiation.

关 键 词：电小天线 阻抗匹配 非福斯特电路 负阻抗变换器 

分 类 号：TN624.1[电子电信—电路与系统]