基于天线测试系统的简易扩频设计及应用

基于通用天线近远场测试系统,给出了系统扩频设计和工程应用的思路,并分别对扩频系统的本振相参、上下变频的一致性进行了论述。实现了Ka频段以下的平面近场、远场天线测量系统的扩频与应用,并给出了8单元EHF频段阵列天线在不同测试系统下的天线测试方向图。测试结果表明,经扩频的测试系统方向图测量数据与毫米波天线测试系统直接测量的结果吻合,说明扩频系统能够满足毫米波天线方向图的测试需求,并具有较高的测试精度,且设计成本较低。同时还具有一定的通用型,对天线的毫米波扩展测试具有较好的工程应用价值。

Design and Application of a Simplified Frequency Extender System Based on the Antenna Measurement System

Based on universal antenna measurement system, a new approach is proposed for the frequency extending design and engineering applications. The coherence of local oscillation of mixers and the consistency of up- down frequency converter channels are discussed. The frequency extending is applied to the existing planar near field and far field antenna measurement systems below Ka band. Finally, the antenna measurement results of an array with 8 antenna units of EHF frequency band under two different test systems are presented. The results show that there is a good agreement between the millimeter antenna measurement system and frequency extending system, which demonstrates that the design of frequency converter system can meet the requirement of millimeter wave antenna measurement and has good measurement accuracy. The design for the simplified frequency converter system is generic and low in cost and thus applicable to millimeter antenna measurement.