用于全方位面覆盖的方向图可重构天线

Compact Pattern-Reconfigurable Antenna for Full Azimuth Coverage

本文设计了一款基于环形介质谐振器的可实现全方位面覆盖的方向图可重构天线。通过结合单极子耦合介质谐振器天线(等效电偶极子)和缝隙耦合介质谐振器天线(等效磁耦极子)来实现方向图可重构的功能。利用了两个馈电端口,并引入6对PIN二极管作为控制三条交叉缝隙的开关。从而实现六种不同状态下的辐射方向图可重构,以覆盖360°方位面。本文所提出的方向图可重构介质谐振器天线工作在2.8GHz,单个方向的辐射方向图具有较宽的半功率波束宽度,10-dB阻抗带宽达4.64%,最大增益也达到了4.3dBi。

In this paper, a pattern-reconfigurable antenna with omnidirectional coverage based on ring dielectric resonator(DR) is designed. The reconfigurable radiation patterns are obtained by combining the monopole-coupled dielectric resonator antenna(DRA)(equivalent electric dipole) and the slot-coupled DRA(equivalent magnetic dipole). Two feed ports are used and six pairs of PIN diodes are introduced as switches to control three overlapping slots. Thus, the radiation patterns of the six different states can be reconfigured to cover the azimuth of 360 degrees. The proposed pattern-reconfigurable DRA works at 2.8 GHz, the single directional radiation pattern has a wide half-power beamwidth, the 10-dB impedance bandwidth is 4.64%, and the maximum gain is 4.3 dBi.