helical antenna的用法和样例：
例句
- Cage Antenna An antenna having conductors arranged cylindrically.
笼形天线天线的导体按照圆柱形排列。 - The principles of microstrip balun and printed dipole were analyzed, and the antenna's ground plane was extended and shaped to form the reflecting structure.
分析微带巴伦和印制偶极子的工作原理，延伸并成形天线的地平面以得到反射结构。 - An Archimedean plannar spiral antenna mounted on the grounded double layer is investiged.
本文对接地双层介质结构上的阿基米德平面螺旋天线进行了研究。
