PRINTED, MULTI-LOOP-ANTENNA SYSTEM INTEGRATED INTO A CONCURRENT, DUAL-WLAN-BAND ACCESS POINT

摘要

A printed, planar multi-loop-antenna system having high-gain, quasi-dual-polarized radiation properties for concurrent, dual-band WLAN operation in the 2.4 and 5.2 GHz bands is presented. The multi-antenna design comprises four printed loop antennas arranged to be of a orthogonal configuration, printed on the same-layer of a 1.6-mm thick FR4 substrate, and one system PCB serving as an efficient reflector for the loops. The four antennas are set within the boundary of the PCB of the typical size for compact, outdoor access-point (AP) applications and stacked there above by a small distance. In this study, the design integrates the system PCB of an AP into an internal multi-antenna solution for compact outdoor APs. The results show that good input matching with 10-dB return loss over the 2.4 and 5.2 GHz bands can be attained. Directional radiation patterns with comparable E_θ and E_φ fields were also obtained.