摘要
正交模变换器作为主要的馈电器件在天线的双极化馈电系统中起着重要的作用。本文结合天线的工作频带及馈电系统的尺寸限制,设计了微带结构S波段宽频带正交模变换器,采用宽带Marchand巴伦和功分器结构,在1.5:1的频带范围内实现了输入信号的功分和180°移相,测试结果表明,在2.6～3.95GHz频带范围内各端口的驻波比小于2.0,输出端口间的幅度不平度小于0.1dB,相位不平度为180±2°,插入损耗在0.5～0.6dB。此器件应用于双极化天线平衡馈电系统,对天线实现等幅反相馈电,取得了良好的效果。
The orthomode transducer plays an important role in the feeding system of dual-polarized antenna. In this paper, according the work band and size of the feeding system, a novel S-band microstrip orthomode transducer is designed, which consists of a broadband Marchand baluns and a power divider. Measurements show that it achieves amplitude unbalance of less than 0. 1dB, phase unbalance of 180±2°,and insert loss of 0. 5 ～ 0. 6 dB from 2. 6 to 3. 95 GHz. It has been used in the balanced feeding system of antennas, and performed well.
出处
《电子测量技术》
2008年第4期65-67,95,共4页
Electronic Measurement Technology
