A Compact CPW-Fed Monopole Antenna With a U-Shaped Strip and a Pair of L-Slits Ground for Wlan and Wimax Applications

Abstract

Abstract-A compact tri-band planar monopole antenna suitable for 2.4/5.2/5.8 GHz WLAN and 3.5 GHz WiMAX is presented. The antenna employs a U-shaped parasitic strip and a defect ground-plane structure. By inserting a U-shaped strip as a parasitic strip into a normal monopole which operates at lower band of the WLAN, one more resonance at the higher WLAN band comes out. A defect ground-plane composed of two symmetrical L-shaped slits leads to another resonance operating at WiMAX band. The proposed antenna has a compact size of 22 × 41 × 0.8 mm 3 and offers good radiation and reflection characteristics in the above frequency bands. The measured VSWR exhibits a good agreement with the simulated one. Detailed design steps, parametric studies and experimental results for the antenna are investigated in this paper.

A novel CB ACS-fed dual band antenna with truncated ground plane for 2.4/5GHz WLAN application

“…Lee at.al [6] presented a compact printed slot antenna for dual and multiband wireless application deployed larger slotted ground plane to achieve multiband WLAN operation. Liu et.al [7] demonstrated a compact CPW-fed monopole antenna with a U-shaped strip and a pair of L-slits ground for WLAN and WiMAX applications utilizes a pair of L shaped defected ground structure and U shaped parasitic element for achieving dual band operation.…”

“…Raman et al [10] presented a novel single-layer dual band-notched printed circle-like slot antenna. These designs [1][2][3][4][5][6][7][8][9][10], however have complex or slotted structures and occupy more area, therefore it is difficult to integrate with WLAN systems. The various techniques like fractal or metamaterials loaded microstrip based structures also reported for improving the performance characteristics of various wireless antennas.…”

Compact triband ACS-fed monopole antenna employing open-ended slots for WLAN/WiMAX applications

“…However, there are only two bands involved in [1][2][3], and only triple WiMAX band is reported in [4], which limited the number of working bands in portable devices. A compact triband planar monopole antenna suitable for WLAN and WiMAX is presented [5], the antenna consists of a L-shaped microstrip feedline and open-ended slot on the ground plane is proposed for WLAN/WiMAX applications [6], miniature triband CPWfed monopole antenna embedded with dual U-shaped slot is reported in [7], the antenna with simply shaped radiator element for multi-operating bands of the wireless communication systems is studied in [8]. Furthermore, some compact antennas for WLAN/WiMAX applications have been presented in [9][10][11][12].…”

“…Thus, different types of multiband antennas have been proposed to cater various user requirements, such as [1][2][3][4][5][6][7][8][9][10][11][12]. For example, a dual-band coplanar patch antenna integrated with an electromagnetic bandgap substrate is reported in [1], a dual-wideband printed T-shaped monopole antenna is proposed for WLAN and WiMAX applications [2], a compact ring monopole antenna with double meander lines is proposed for WLAN applications [3], a couple dual-U-shaped antenna is presented for WiMAX triband operation [4].…”

Design of Tri-Band Printed Monopole Antenna for Wlan and Wimax Applications

“…Furthermore, they also have the advantages of low profile, simple structure, easy fabrication, and good monopolelike radiation pattern. Many dual-wideband and wideband printed monopole antennas have been proposed in [1][2][3][4][5][6][7] for WLAN and WiMAX applications. However, when these antennas are used in WLAN and WiMAX systems, additional band pass filters are required to avoid collision and minimize frequency interference because their wide operating bands cover many existing narrowband services.…”