A small dual-frequency transformer in two sections
A small dual-frequency transformer in two sections
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DOI：
10.1109/tmtt.2003.809675
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发表时间：
2003-04-01
影响因子：
4.3
通讯作者：
Monzon, C
中科院分区：
文献类型：
--
作者：
Monzon, C
最有用的传输线结构之一是四分之一波长Transformer，用于在单一频率f（0）下对线路进行阻抗匹配。分析了两段式电小Transformer在两个任意频率下实现理想阻抗匹配的可行性。为了实现这一点，所得到的超越传输线方程的两个部分的精确解得到没有限制。Transformer的参数以显式封闭形式给出，并且是精确的。这项研究的结果是有用的，一些实际的设计问题，包括双频天线和RF电路一般。特别地，在重要的第一谐波频率2f（0）处的理想操作的可行性被证明。
One of the most useful transmission-line constructs is the quarter-wave transformer that is used to impedance match a line at a single frequency f(0). The feasibility of an electrically small transformer with two sections and capable of achieving ideal impedance matching at two arbitrary frequencies is demonstrated analytically. To achieve this, the exact solution to the resulting transcendental transmission-line equations for two sections is obtained with no restrictions. The parameters of the transformer are presented in explicit closed form, and are exact. The results of this study are useful for a, number of practical design problems, including dual-band antennas and RF circuits in general. In particular, feasibility of ideal operation at the important first harmonic frequency 2f(0) is demonstrated.