• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Antennas and Propagation, IEEE Transactions on >A Wideband Circularly Polarized Conical Beam From a Two-Arm Spiral Antenna Excited in Phase
【24h】

A Wideband Circularly Polarized Conical Beam From a Two-Arm Spiral Antenna Excited in Phase

机译：相位激发的两臂螺旋天线产生的宽带圆极化锥形束

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Analysis is performed for a two-arm round spiral structure excited in phase, where the arms near the antenna center are backed by a small round disc. This spiral antenna has a frequency range where the radiation is bidirectional, having patterns symmetric with respect to the antenna plane. Subsequently, the bidirectional radiation is transformed into a unidirectional conical beam by backing the spiral with a cavity, where the cavity height is chosen to be extremely small (0.077 wavelength at the lowest design frequency 3.3 GHz). It is found that, as the distance between the spiral plane and the small disc inside the cavity is decreased, variations in the axial ratio and VSWR become smaller, as desired. Other antenna characteristics over a wide frequency range of 3.3 GHz to 9.6 GHz, including the gain and radiation efficiency, are also discussed.
机译：对同相激励的两臂圆形螺旋结构进行分析，其中天线中心附近的臂由一个小圆盘支撑。该螺旋天线具有辐射是双向的频率范围，具有相对于天线平面对称的图案。随后，将双向辐射通过带有腔体的螺旋形背衬转换为单向锥形光束，其中腔体高度选择得非常小（在最低设计频率3.3 GHz时为0.077波长）。已经发现，随着螺旋平面与腔内小盘之间的距离减小，轴向比和VSWR的变化根据需要变小。还讨论了3.3 GHz至9.6 GHz宽频率范围内的其他天线特性，包括增益和辐射效率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号