复权重天线馈电网络的发展现状

Resent Progress of Antenna Feeding Network with Complex Weight

近年来,在新兴的通信技术与军事技术的驱动下,多模天线单元与非常规天线阵成为天线技术中的研究热点。这类天线包括各种新型的用到复权重馈电网络的多模天线单元、相位中心连续可移动虚拟天线阵、阵元方向图分集天线阵等等,它们都有重要的应用前景。然而复权重馈电网络的现行解决方案是在馈电网络各支路中级联移相器和可变增益放大器,通过复杂的有源电路甚至有源系统实现。已有方案存在结构复杂、成本高、功耗大等缺点。因此,研究结构简单、低成本、低功耗的无源复权重馈电网络,尤其是可电调无源复权重馈电网络,具有重要的科学意义与广泛的应用价值。文章在这方面提出了若干新的设想。

In recent years,multimode antenna and unconventional antenna arrays have become research hotspots in antenna technology,under the driven of emerging communication technology and military technology. Such antennas include various new types of antennas which use the feeding networks with complex weight,such as multimode antenna,virtual array antenna with continuously moving phase center,and element level pattern diversity antenna array. They all have important application prospects. However,the current solution to the feeding network with complex weight is to add phase shifter and variable gain amplifier to each branch. They are constructed in active circuit,or even active system,having the disadvantages of complicated structure,high cost,and large power consumption. Therefore,research on passive complex weight feeding networks with simple structure,low cost,and low power consumption,especially on electrically controlled passive complex weight feeding network,has important theoretical significance and application value. This article proposes several new ideas in this regard.