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四端网络的特性可用S、Y、Z、G、H(或A.T)等任一种参数描述,不同型式参数间具有一定的换算关系.对于微波四端网络,采用S参数表示是方便的,因为它较易于与具有指定输入和输出线特性阻抗的待测四端器件在微波频率下的入射波和反射波测量结果联系起来;另一方面,在微波频率,导纳和阻抗测量要求实现器件输入(或输出)端口的绝对短路和开路,直接精确测定Y、Z、G、H参数是困难的.尽管如此,工程师们仍常常要求知道网络的惯用参数,也就是需要对网络的各种参数表示进行换算,本文给出的TI-59程序将有助于他们作出S、Y、Z、G、H参数的相互转换.
The characteristics of the four-terminal network can be described by any parameter such as S, Y, Z, G, H (or AT), and the conversion between different types of parameters has a certain conversion relationship.For the microwave four-terminal network, it is convenient to use S parameters, Because it is easier to correlate incident and reflected wave measurements at the microwave frequency of the four-terminal device under test with the specified characteristic impedance of the input and output lines; on the other hand, admittance and impedance measurements at microwave frequencies require implementation of the device It is difficult to determine the Y, Z, G, H parameters directly and accurately by inputting (or outputting) absolute short and open ports. However, engineers often ask to know the usual parameters of the network, that is, Said that the conversion, TI-59 program given in this article will help them make S, Y, Z, G, H parameters of mutual conversion.