CAJ | 학술논문

通过计算发现了终端短路的λ/4传输线与主电路并联时，具有开路点可连续自由移动的特性。分析、论证了这一特性的正确性。该特性可用于有源微波电路中的直流偏置电路，并能改善其特性。分析并讨论了设计这种电路时应注意的几个问题。介绍了一种采用该直流偏置的8.5 GHz小信号线性放大器实例，并进行了电路仿真，对比了接入该直流偏置前后的仿真结果。此设计方法最适合点频和窄带匹配电路的设计，对较宽频带的设计也有参考价值。
통과계산발현료종단단로적λ/4전수선여주전로병련시，구유개로점가련속자유이동적특성。분석、론증료저일특성적정학성。해특성가용우유원미파전로중적직류편치전로，병능개선기특성。분석병토론료설계저충전로시응주의적궤개문제。개소료일충채용해직류편치적8.5 GHz소신호선성방대기실례，병진행료전로방진，대비료접입해직류편치전후적방진결과。차설계방법최괄합점빈화착대필배전로적설계，대교관빈대적설계야유삼고개치。
It is found that the characteristics of open point can be freely moved continuously whileλ/4 transmission lines with terminal short circuit is connected in parallel into main circuit. The correctness of this characteristic is analyzed and demonstrated. The above characteristic can be used in DC bias circuit of the active microwave circuits to improve its property. An example of 8. 5GHz small signal linear amplifier by employing this DC bias circuit is in-troduced, whose circuit simulation is performed. The simulated results before and after connecting this DC bias cir-cuit are compared. The results show that this design method is most suitable for dot frequency and narrow band matching circuit. It is also valuable for reference in design wider frequency band circuit.