Miniaturized CPW-Fed Triband Antenna with Asymmetric Ring for WLAN/WiMAX Applications

Shanshan Huang,Jianzhong Zhao,Jun Li

doi:10.1155/2014/419642

Shanshan Huang, Jianzhong Zhao + Show 1 more

Open Access

https://doi.org/10.1155/2014/419642

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Abstract

A compact CPW-fed triband slot antenna for WLAN/WiMAX applications is proposed. The proposed antenna is formed by an asymmetric ring, an inverted L-strip, and a straight strip. By employing these structures, the antenna can generate three operation bands with compact size and simple structure. The measured and simulated results show the presented antenna has impedance bandwidths of 100 MHz (2.39–2.49 GHz), 360 MHz (3.36–3.72 GHz), and 760 MHz (5.13–5.89 GHz), which covers both WLAN in the 2.4/5.2 GHz bands and WiMAX in the 3.5/5.5 GHz bands. The antenna is successfully simulated and measured, showing triple bands can be obtained by using three different radiators and also indicating that the proposed antenna is suitable for the WiMAX/WLAN applications.

Highlights

In recent years, with the rapid development of WLAN/ WiMAX systems, the demand for antennas with small size, low cost, multifrequency operation capabilities, and high efficiency has increased
The multiband antenna is more attractive than broadband antenna, because the broadband antennas contain dispensable bands in WLAN/WiMAX system
It can be seen that center frequencies of the three bands are almost unchanged, and the first band of the proposed triband antenna is unaffected by l4

Summary

Introduction

With the rapid development of WLAN/ WiMAX systems, the demand for antennas with small size, low cost, multifrequency operation capabilities, and high efficiency has increased. Many multiband antennas have been proposed for WLAN or WiMAX applications such as [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]. A CPW-fed antenna [1] composed of U-shaped and triangular radiating elements can generate two bands to meet the requirements for WLAN/WiMAX systems. Triband antenna only for WiMAX application is obtained by a coupled dual-U-shaped radiator in [5]. In [9] a microstrip-fed monopole antenna with a fork-shaped strip is proposed to meet WLAN and WiMAX applications. The dimensions of antennas in [9, 10] are with large size of 34.5 × 18 × 1 mm3 [9], 30 × 20 × 0.8 mm3 [10], and 30 × 18 × 1.6 mm3 [11] which may limit their integration with future miniaturized wireless communication systems

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Conclusion