Design of a Circularly Polarized Microstrip Antenna for Wlan

Abstract

Abstract-The design and performance of a circularly polarized microstrip patch antenna, for the application in Wireless Local Area Network (WLAN), are reported here. The antenna is a proximity coupled microstrip patch antenna where the radiating patch is loaded by a V-slot. This miniaturized microstrip antenna has wide bandwidth in the frequency band of WLAN and exhibits circularly polarized far field with very good axial ratio bandwidth. The simulated results using IE3D software are verified by measurement.

Hexagonal Circularly Polarized Patch Antenna for RFID Applications

“…Various perturbation methods have been adopted in literature for designing a single feed circularly polarized microstrip antenna. Truncating the corners of the hexagonal patch and inserting slits [1], One "V" shaped slot embedded into a cross shaped rectangular patch antenna [2], asymmetric-circular shaped slotted microstrip patch antennas with slits [3], two crossed PIFA [4], a cross-strip embedded along the Xshaped slot for a proximity-fed technique [5], antenna using a set of slits and slots [6], a cross slot embedded on the radiating patch [7], truncating corners of a square patch and inserting slits of different lengths at the edges of a square patch [8,9], two slits inserted at the annular-ring patch [10], embedding a circular central elliptical slot on a circular patch [11], truncating the corners of a polygonal patch are some of the techniques employed to radiate circularly polarized waves. In this structure, a hexagonal microstrip patch antenna with the perturbation technique of embedding a central elliptical slot and two circular slots is proposed.…”

A Dual-Band Omni-Directional Microstrip Antenna

“…If a computer has a wireless card, it is most likely Wi-Fi compatible, where wireless card transmits to a wireless router, which is connected to a network, cable modem or DSL modem. Several printed antennas for WLAN applications have been reported in [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Circularly Polarized T-Stub Coupled Microstrip Antenna Structure for WLAN

“…Two rectangular slots loaded on the patch on opposite sides provide circular polarization as in Figure 1. Slot loading on opposite edges signiicantly improves bandwidth besides providing circular polarization [8]. The co-axial probe feed point is 10 mm to the left of centre and 3 mm below the centre of the patch.…”