A new pattern-reconfigurable antenna with the function of 360 degrees wide-beam scanning and main beam direction finely-adjustable

摘要

A new pattern-reconfigurable antenna with the function of 360 degrees wide-beam scanning and main beam direction finely-adjustable is proposed in this letter. The antenna consists of a central feeding disc which surrounded by four snowflake radiators on the top layer of the FR4 substrate. PIN diodes are placed between the disc and each snowflake patch for realizing the wide-angle beam steering of the antenna. By controlling the four PIN diodes on the top layer, main beam can be switched in four directions with about 90 degrees steps in the H-plane (17 degrees, 106 degrees, 197 degrees, and 287 degrees).The bottom layer of the substrate includes a ground plane with eight rectangular ring slots. Eight PIN diodes installed on each slot are used to further control the beam direction of the antenna. By controlling the states of the PIN diodes on the bottom layer, the main beam of the proposed antenna is capable to deflect rightward or leftward about 10 degrees on the basis of the original four states. The simulated and measured results show that the antenna operates well at 3.64-3.88GHz under 12 states and achieves good performance with flexible pattern reconfigurability in 12 directions. The proposed antenna could be applied in 5G wireless communication systems.