X波段波导自动测量线系统

An Automatic Slotted-line Test System at X-Band

本文叙述一个用传统的开槽测量线配以Apple-Ⅱ微机构成的波导自动测量系统,其核心部分是可程控测量线和可程控短路活塞。由于传统测量线有性能稳定可靠、价格低廉的优点,现加上计算机高速计算和自动控制的功能,就实现了一种新颖的价廉物美的微波自动测量系统。它由不十分复杂的硬件配以合适的软件支持,可以使测量精度优于手动测量线,测量速度大大提高。本文还讨论了扩展动态范围、提高测量精度的方法,提出了解决宽带测量的方法。本文中还给出了测波源驻波系数、双口网络复S参数和无耗双口网络端面小反射等三个应用实例。

In this paper, an automatic test system based on the traditional slotted line system and controlled by an Apple-II micro- computer is introduced. The key parts of the system is an automatic slotted line and a programmable variable short circuit. This system remains the advantages of a conventional slotted line system such as stable, reliable and low Cost. Adding the functions of rapid calculation and autocontrol, it becomes a high performance, low cost, automatic microwave test system. With rather simple hardware and proper soft- ware, the measurement speed and accuracy of this system can be much better than that of the traditional one. The methods of expanding dynamic range, accuracy enhancement and wide band test are discus- sed. Some typical examples for measuring source VSWR, complex S-para- meters of two-port networks and small reflection of lossless two-port network are given.