5、B,端口电压驻波比小于1.25,达到了技术指标要求。3、搭建了天线阻抗测量系统。首先对该系统的工作原理进行了深入分析,从理论上证明了该系统的可行性;其次,针对天线阻抗测量系统中的信号源、以及检测芯片进行了选择,并简要介绍了各个部件的原理和功能,在工程方面论证了天线阻抗测量系统的可行性。关键词:短波天线,阻抗测量,集总参数,定向耦合器,检测芯片I万方数据西安电子科技大学硕士学位论文II万方数据ABSTRACTABSTRACTIn China, with the rapid development of the wi
6、reless communication, the antenna industry has occupied an important position in China's national economy. But the development of HF antennas is relatively backward. Impedance measurement is the primary problem for HF antennas.It is difficult to measure the i
7、mpedance of HF antenna via traditionalmeasurementsystems due to the fact that they have a large volume and are usually erected in field. Aiming at this problem, a simple and portableimpedance measurementsystem is designed and constructed for HF antennas in th
8、is thesis.Specifically, the major contributions of this thesisare summarized as follows:1.At first, this paper deeply studied the basic knowledge of the antenna impedance, and on the basi