Differentially-fed dual-polarization four beam pattern reconfigurable antenna [差分馈电双极化四波束方向图可重构天线]

作者：Jin G.; Li M.; Lu D.; Sun Y.; Liao S.^*

来源：Chinese Journal of Radio Science, 2021, 36(2): 187-194.

DOI：10.13443/j.cjors.2020032001

• Differential fed
• Dual-dipole
• Pattern reconfigurable antenna
• PIN diodes
• Planar structure

A planar differentially-fed dual-polarization four beam pattern reconfigurable antenna is proposed in this paper. It is composed of two orthogonal dual-dipole elements and four parasitic elements embedded with four PIN diodes. The two dual-dipole elements are overlapped and 90° rotational symmetrical, making the overall structure very compact. Dual-dipole elements are excited differentially through short microstrip feeding lines. All dipoles and parasitic elements are etched on the same substrate, resulting in a full planar structure. Four beam pattern reconfigurability and dual-polarization reconfigurability are realized by switching the combinations of PIN diodes states. The antenna obtains a ?10 dB impedance bandwidth of 8.9% covering from 3.27 to 3.58 GHz, an average gain of 5.6 dBi, an FBR about 10 dB, and average radiation efficiency of 68% in the measurement. The proposed antenna has compact structure, low cost and easy processing.

• 单位
  华南理工大学; 毫米波国家重点实验室