超宽带双馈源反射面天线
Ultra-Wideband Reflector Antenna with Two-Feeds
-
摘要: 比幅测角具有原理简单,工程易实现的特点[1].天线沿轴向对称放置的双馈源常采用喇叭、振子等形式.然而对于倍频程带宽的超宽带情况,普通喇叭、振子天线很难满足波束相交电平要求.本文分析了超宽带工作下馈源的偏焦特性及双馈源的相对位置关系,并结合仿真和实验设计了大张角对数周期天线来作为馈源,在倍频程上实现波束相交电平近似一致的双波束.Abstract: The characteristics of measuring angle by comparing amplitude are its simple principles and easy realization in engineering.Two horns or two dipoles are used as feeds that are symmetrically displaced from the boresight axis.However,as far as the Ultra-wideband,such as octave bandwidth is concerned,the normal horns and dipoles can not satisfy the requirements of crossover level.The paper analyzes the characteristics of deviation focus of the feeds and the relative position relationship of the two feeds in the work of ultra-wideband and designs a large flare angle LDPA as feed by simulations and experiments to achieve double lobes with almost equal crossover level in octave bandwidth.
-
Keywords:
- Comparing amplitude /
- LDPA /
- Crossover level
-
计量
- 文章访问数: 108
- HTML全文浏览量: 0
- PDF下载量: 1