CPW-Fed Slot Antenna for Wideband Applications

T Shanmuganantham,S Raghavan,K Balamanikandan

doi:10.1155/2008/379247

T Shanmuganantham, S Raghavan + Show 1 more

Open Access

https://doi.org/10.1155/2008/379247

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Abstract

A new coplanar waveguide (CPW)-fed wideband printed slot antenna is presented, and the impedance characteristics of this antenna with different sizes of tapers are discussed. The effect of tapering angle with the resonant frequency is also observed. The fundamental parameters of the antenna such as bandwidth, return loss, gain, radiation pattern, and polarization are obtained. All meets the acceptable antenna standards. The measured input impedance bandwidth (return loss < −10 dB) of the prototype antenna is 52% (4.27–7.58 GHz). The radiation patterns are bidirectional in both planes. This antenna can be part of various wireless communication systems.

Highlights

The market for wireless local area network (WLAN) products is booming rapidly with the roll out of IEEE 802.11b products into the home, public, and office environments
On the other hand, printed slot antennas fed by coplanar waveguide (CPW) have several advantages over microstrip patch antennas
The geometry of the proposed coplanar waveguide (CPW)fed slot antenna is shown in Figure 1 with all dimensions in mm

Summary

INTRODUCTION

The market for wireless local area network (WLAN) products is booming rapidly with the roll out of IEEE 802.11b products into the home, public, and office environments. Several frequency bands have been assigned to the RFID applications, such as 125 KHz, 13.56, 869, 902–928 MHz, 2.45, and 5.8 GHz. public safety application is allocated around 4.9 GHz. To cover plenty of applications, single antenna with wider bandwidth is desirable. On the other hand, printed slot antennas fed by coplanar waveguide (CPW) have several advantages over microstrip patch antennas. A coplanar waveguide-fed broadband printed slot antenna with linear taper is presented in [12] to increase the impedance bandwidth. The bow tie slot antenna [13] has been studied and has shown a wide bandwidth approaching 40% In this present work, the antenna is designed using a new type of tapering structure with CPW-fed to achieve wide bandwidth. The analysis is performed numerically using method of moments from the Zeland- IE3D

ANTENNA STRUCTURE AND DESIGN

RESULTS AND DISCUSSION

CONCLUSION