self-radiation impedance

Finally, the impedance characteristic of piezoelectricity transducer and the principle of frequency tracking were studied. Software phase-locked loop was used to track self-adapting frequency, and arithmetic of frequency tracking based on change step and dichotomy was presented.

最后，对压电换能器的电抗特性和频率跟踪原理进行研究，采用软件锁相环进行了频率自适应跟踪设计，提出变步进与二分法相结合的频率跟踪算法。

In this paper, the expressions of the input impedance for a probe type coaxial line-rectangular waveguide transducer are derived by means of self-reaction of an assumed current over the probe.

本文利用探针上假定电流的自反应，导出了探针式同轴线-矩形波导转换器输入阻抗的表达式。

Applied network equation of state of circular current method and meanwhile that can be showed as a new formula of loop self-complex impedance and loop mutual-complex impedance to deduce arbitrary parameter Y of passive tow-port network. The other parameters can be deduced with the results.

应用场论说中回路电流法的网络状态方程和同时可表示回路自复阻抗和回路互复阻抗的新公式，去推导任意的线性无源二端口网络的Y参数，从而导出其它参数。