Dual Band Compact Open Loop Antenna Design for Wireless Local Area Network

Abstract

A novel dual band open loop antenna refers to a slot and an inverted-L ground (Inverted-L) between the main resonant radiating elements connected to two radiating metal elements. short-line), and is directly printed on a FR4 PCB board substrate, so that the antenna can obtain dual frequency operating frequency. It contains a parallel bent main resonant radiating element connected to the feeding end, which can be adjusted to the size of the radiating element by changing the quarter-wavelength based on A high-frequency operating frequency band and an inverted-L short-line radiating element. One end of a rectangular metal element is connected to the main common-amplitude radiation metal element, and the other end is provided with a parallel slot and Inverted-L short-line radiating elements are coupled to obtain a low-frequency operating frequency band; and the gap of this parallel slot is exactly 0.01λ wavelength of the operating frequency, and the coupling part radiation pattern. The surface current generated by the loop is used to increase the antenna operating bandwidth (Bandwidth), so that the antenna can obtain dual-band operating bandwidth and good antenna gain.