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

Abstract

A novel design of a simple circular ring with open-ended monopole antenna for wireless local area network (WLAN) applications is proposed in this article. The proposed antenna consists of an open-ended circular ring and 50-Ω microstrip feed-line. The proposed antenna is capable of generating two separate resonant modes with good impedance-matching conditions. A prototype of the proposed antenna is designed, fabricated, and measured. Acceptable agreement between the measurement and simulation results is achieved. Experimental results show that the proposed antenna has operating bandwidths of 1.99-3.04 GHz and 5.08-6.1 GHz with a return loss of less than-10 dB, covering the required bandwidths of the 2.4/5.2/5.8-GHz WLAN standards. This is a microstrip antenna for IEEE 802.11a/b wireless local area networks applications. Meanwhile, the two-dimensional (2D) radiation patterns and three-dimensional (3D) gain performance of the antenna are also observed and discussed.

Axisymmetric Slot Perturbation According to Perpendicular Feed for Circularly Polarized Microstrip Antenna

“…For these reasons, the circular polarization of antennas has become more attractive compared with that of linear polarization due to effectiveness in reliable communication sensitivity and reducing a multipath fading for the orientation between transmitter and receiver in wireless communication [5][6][7]. Furthermore, to satisfy the demands of the size, weight, cost and ease of system integration, a microstrip antenna is chosen for V2N communication [8][9][10][11]. Accordingly, a circularly polarized microstrip antenna can be an excellent candidate to achieve independent signals and to reduce various interferences and in V2N communication systems.…”