A low profile polarization reconfigurable dipole antenna using tunable electromagnetic band-gap surface

作者：Yi Guangwei; Huang Cheng; Ma Xiaoliang; Pan Wenbo; Luo Xiangang^*

来源：Microwave and Optical Technology Letters, 2014, 56(6): 1281-1285.

DOI：10.1002/mop.28345

• circular polarization
• polarization reconfigurable antenna
• electromagnetic band-gap

In this article, we present a low profile polarization reconfigurable dipole antenna using a tunable electromagnetic band-gap (EBG) structure as ground plane. The EBG structure can be dynamically modulated by tuning the loaded PIN diodes through bias voltage circuit. The EBG-based antenna is fabricated and measured. Experimental results show that the tunable EBG structure can make the dipole antenna work at four states. For the state 1 and state 2, the emitted waves with left-hand and right-hand circular polarization are produced at 4.6 GHz, and the axial ratio is 1.2 and 0.3 dB, respectively. For the state 3 and state 4, the dipole antenna radiates the linearly polarized waves with the gains of about 6 dB at 4.6 and 4.25 GHz, respectively.

• 出版日期2014-6
• 单位中国科学院光电技术研究所