Studies on Dual-band Circularly-polarized Slot Antennas with Double-bend Feeding Line for UAV Applications

• Main Authors: Chang Chien, Hung-Hsieh, 張簡宏劦
• Other Authors: Hung, Chien-Chun
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/33465066361944103246

碩士 === 國防大學理工學院 === 航空太空工程碩士班 === 99 === A dual-band circularly polarized (CP) printed slot antenna with a tunable frequency-ratio range is proposed in this thesis. The proposed antenna design which can find applications on UAV (Unmanned Aerial Vehicle) features a ring slot etched on ground plane, the two coupling slots beneath the ring slot, the embedded spurs-like-shaped strip in the ring slot, a double-bend feeding line and a rectangular pad connected with the feeding line for improving the impedance match of the lower frequency band. The spur-like-shaped strip can be employed to create a higher CP frequency band without deteriorating the performance of original lower CP frequency band which causes a broadband or dual-band CP performance.