Rectangular Ring Open-Ended Monopole Antenna with Inverted L-Strip for WLAN Dual-Band Operations

Abstract

A novel design for a simple rectangular ring with open-ended monopole antenna wireless local area network (WLAN) applications is proposed in this article. The proposed antenna consists of an open-ended rectangular ring, an inverted L-strip, and a rectangular slit in the ground plane, and is fed by a 50 Ω microstrip feed-line. Prototypes of the proposed antenna were designed, fabricated, and tested. Experimental results show that the proposed antenna receives 2.3125-2.775 GHz and 4.8625-6.7125 GHz with a return loss less than-10 dB, covering the required bandwidths of the 2.4/5.2/5.8 GHz WLAN standards. Meanwhile, the 2D radiation patterns and 3D gain performance of the antenna in the operation bands were also observed and discussed.

Circular Ring Open-Ended Monopole Antenna with Strip for WLAN Dual-Band Operations

“…With an increase in the popularity of WLAN communication, the demand for a printed monopole antenna designed with a low-profile, light-weight, flush-mounted, and simple structure has increased. Recently, multiband antennas for WLAN applications have been reported [1][2][3][4][5][6][7][8][9][10][11]. Among all these antennas, printed monopole antennas play an important role due to their attractive features of simple structure, low profile, and reasonably good performance.…”

“…[19]. The block diagram of the antenna design process is given in [11]. GHz bands, as can be seen in the figure, the impedance bandwidth and return loss characteristics varied slightly.…”