A cross shaped spiral antenna radiating omnidirectional circularly and linearly polarized waves

IEICE Electronics Express

Toshiaki Matsunaga²  Mayumi Matsunaga¹  Kenji Kakemizu¹ 

[1] Department of Electrical and Electronic Engineering, Ehime University;Fukuoka Institute of Technology

关键词: circularly polarized antennas;    multi-polarization antennas;    RFID;    GPS;    omnidirectional antennas;    multi-frequency antennas;   

DOI  :  10.1587/elex.9.256

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(6)Cited-By(2)A novel spiral antenna that simultaneously radiates circularly and linearly polarized waves is presented. The antenna achieved radiating omnidirectional circularly polarized waves by shaping a spiral antenna as its looks like a cross. Moreover, putting a parasitic element close to it, it succeeded in being utilized as a linear polarization antenna at the same time. This paper explains the reason why the antenna radiates multi-polarization waves and how the antenna is designed in order to utilizing frequencies. Experimental results of return losses, radiation patterns and axial ratios of a prototype antenna are shown for verifying its performance. The antenna can be expected to be used for multifunctional mobile communication devices, because it is a single feed and single layer printable antenna.

【 授权许可】

Unknown