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A SPICE Model of Transmission Lines Transformer (TLT)

机译：传输线变压器（TLT）的SPICE模型

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Transmission line transformers (TLT) are widely used in antennas and RF broadband matching circuits. There are many constructive types, the balun is one of them, however this paper focus on the simpler inverting TLT. The classical theory for TLT uses two different approaches to model the low frequency and high frequency operation. The limit between the low frequency lumped circuit model and the high frequency distributed model (single transmission line) is sometimes unclear. The paper present a model for the TLT as an assembly of two coupled symmetrical lossless lines with common return. The aim of the paper is to analytically and experimentally validate such an approach, and then, based on this analysis, to find a SPICE model for the TLT which can be used across the whole frequency range, taking into account the influence of the core.
机译：传输线变压器（TLT）广泛用于天线和RF宽带匹配电路。构造类型有很多，不平衡变压器就是其中之一，但是本文着重于更简单的反相TLT。 TLT的经典理论使用两种不同的方法来对低频和高频操作进行建模。低频集总电路模型和高频分布模型（单条传输线）之间的界限有时不清楚。本文提出了TLT的模型，该模型是两条具有共同收益率的对称对称无损线的组合。本文的目的是通过分析和实验验证这种方法，然后在此分析的基础上，考虑到磁芯的影响，找到可以在整个频率范围内使用的TLT SPICE模型。

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