传输线变压器相位补偿技术及其应用

传输线变压器是在短波和超短波频段使用广泛的重要器件,根据传输线变压器原理设计制造的器件具有结构紧凑、功率容量大、频带宽、损耗小等优点.该文研究了利用慢波线原理和相位补偿技术克服传输线变压器对于传输线电长度的限制,使其适用频率向s波段以上扩展的方法.文中给出了1:4阻抗变换器电路的传输损耗和高低端输入阻抗理论公式并对其进行了讨论.对所设计的S波段1:4阻抗变换器及功率合成器进行了仿真分析并设计制作了实物.仿真和实测结果表明,利用慢波线原理和相位补偿后的传输线变压器能够适用s波段及以上微波器件.

Phase Compensation Technology and Application to Transmission Line Transformer

The transmission line transformer is one of the widely used component in the short wave and the ultra-short wave frequency band. Designed and manufactured components according to the transmission line transformer principle have advantages in compact structure, high power capacity, wide frequency band, low insertion loss and so on. This article presents the techniques to overcome the electrical length limitations of the transmission line for the transmission line transformer devices based on the slow wave principle and the phase compensation technology, and it is possible to employ the transmission line transformer up to the S band. As the example, the theoretical expressions for transmission loss and the high/low input impedance are presented and discussed according to the proposed techniques. Furthermore, the simulation analysis to the 1:4 impedance transformer and power combiner in S band are presented in this paper. The power combiner according to the proposed techniques has been produced and tested. The results of simulation and measured curves indicated that the transmission line transformer devices utilizing the phase compensation technique, together with the slow wave principle, can realize the microwave devices up to the S band.