22-06-2013, 03:45 PM
A TRIPLE-BAND CPW-FED MICROSTRIP ANTENNA FOR WLAN AND
WiMAX APPLICATIONS
[attachment=55882]
ABSTRACT
A modified planar monopole antenna with triple-band operation suitable for wireless local area network
(WLAN) and world interoperability for microwave access (WiMAX) applications is presented in this paper. The
investigated antenna consists of a triangle with meandering at the top, a trapeziform ground plane, parasitic
elements, one horizontal & four vertical strips at the bottom of the triangle. It printed on an inexpensive FR4
substrate, and is fed by a coplanar waveguide (CPW) feed line. With a trapeziform ground plane, the bandwidth
of the proposed antenna can effectively improved compared to a conventional rectangular ground plane. The
measured 10 dB bandwidth for return loss is from 2.54 to 2.60 GHz and 3.53 to 6.04 GHz, covering all the 5.2/5.8
GHz WLAN bands and partially 2.5/3.5/5.5 GHz WiMAX bands. Also, good similar omni directional radiation
patterns have been achieved.To investigate the performance of the proposed antenna configurations moment
method code, IE3DTM, was used for required numerical analysis and obtaining the proper geometry parameters.
INTRODUCTION
Recently the multi-band or broadband antennas have attracted high interest for application to
multimode communication systems was described by the Elsadek, H. and D. Nashaat in 2006 .
Qin, W in 2007 define A novel patch antenna with a T-shaped parasitic strip .Which cover
2.4/5.8 GHz WLAN applications . After that A Novel multi-frequency and broad-band designs
of isosceles triangular microstrip antennas with five stubs by the Zhang, G.-M., B. He, J. Liu,
and J.-X. Zhu in 2007. Which contain a wide band width . CPW-fed compact meandered strip
antenna on a soft substrate for dualband WLAN communication are invented by Liu, W.-C. and
Y.-T. Kao in 2007. Various antenna designs have been developed and presented in the literature.
These presented antennas include the planar inverted-F antennas (PIFAs) was invented by the C.
DESIGN OF ANTENNA
The geometry of the proposed CPW-fed planar microstrip antenna for triple-band operations is
shown in Fig.1. Which cover the 5.2/5.8 GHz WLAN and partially 2.5/3.5/5.5 GHz WiMAX
bands applications. For the design studied here, the antenna is etched on the same side of an
inexpensive FR4 substrate with the dielectric constant of 4.4 and the substrate thickness of 1.6
mm (h), while the other side is without any metallization. The antenna structure is consist of a
triangle with meandering at the top, a trapeziform ground plane, parasitic elements, one
horizontal & four vertical strips at the bottom of the triangle at an optimized offset triple-band
operation is attained. With a trapeziform ground plane, the bandwidth of the proposed antenna
can effectively improved compared to a conventional rectangular ground plane. Here the
trapeziform ground plane has three functions: the first is a ground plane for the monopole and the
CPW; the second is as a radiating element; and the third is a component to form the distributed
matching network with the monopole, which results in the wideband impedance characteristics
compared to the conventional rectangular ground plane.
CONCLUSION
A triple-band microstrip antenna for WLAN/ WiMAX applications is proposed in this article.
By connecting a triangle with meandering at the top, a trapeziform ground plane, parasitic
elements, one horizontal & four vertical strips at the bottom of the triangle at an optimized offset
triple-band operation is attained. The measured results show that the antenna can cover the bands
of 5.2/5.8 GHz WLAN bands and partially 2.5/3.5/5.5 GHz WiMAX bands. Also, good similar
omni directional radiation patterns have been achieved. The proposed structure is of a simple
structure and compact size, and it is suitable candidate for wireless communication systems.
WiMAX APPLICATIONS
[attachment=55882]
ABSTRACT
A modified planar monopole antenna with triple-band operation suitable for wireless local area network
(WLAN) and world interoperability for microwave access (WiMAX) applications is presented in this paper. The
investigated antenna consists of a triangle with meandering at the top, a trapeziform ground plane, parasitic
elements, one horizontal & four vertical strips at the bottom of the triangle. It printed on an inexpensive FR4
substrate, and is fed by a coplanar waveguide (CPW) feed line. With a trapeziform ground plane, the bandwidth
of the proposed antenna can effectively improved compared to a conventional rectangular ground plane. The
measured 10 dB bandwidth for return loss is from 2.54 to 2.60 GHz and 3.53 to 6.04 GHz, covering all the 5.2/5.8
GHz WLAN bands and partially 2.5/3.5/5.5 GHz WiMAX bands. Also, good similar omni directional radiation
patterns have been achieved.To investigate the performance of the proposed antenna configurations moment
method code, IE3DTM, was used for required numerical analysis and obtaining the proper geometry parameters.
INTRODUCTION
Recently the multi-band or broadband antennas have attracted high interest for application to
multimode communication systems was described by the Elsadek, H. and D. Nashaat in 2006 .
Qin, W in 2007 define A novel patch antenna with a T-shaped parasitic strip .Which cover
2.4/5.8 GHz WLAN applications . After that A Novel multi-frequency and broad-band designs
of isosceles triangular microstrip antennas with five stubs by the Zhang, G.-M., B. He, J. Liu,
and J.-X. Zhu in 2007. Which contain a wide band width . CPW-fed compact meandered strip
antenna on a soft substrate for dualband WLAN communication are invented by Liu, W.-C. and
Y.-T. Kao in 2007. Various antenna designs have been developed and presented in the literature.
These presented antennas include the planar inverted-F antennas (PIFAs) was invented by the C.
DESIGN OF ANTENNA
The geometry of the proposed CPW-fed planar microstrip antenna for triple-band operations is
shown in Fig.1. Which cover the 5.2/5.8 GHz WLAN and partially 2.5/3.5/5.5 GHz WiMAX
bands applications. For the design studied here, the antenna is etched on the same side of an
inexpensive FR4 substrate with the dielectric constant of 4.4 and the substrate thickness of 1.6
mm (h), while the other side is without any metallization. The antenna structure is consist of a
triangle with meandering at the top, a trapeziform ground plane, parasitic elements, one
horizontal & four vertical strips at the bottom of the triangle at an optimized offset triple-band
operation is attained. With a trapeziform ground plane, the bandwidth of the proposed antenna
can effectively improved compared to a conventional rectangular ground plane. Here the
trapeziform ground plane has three functions: the first is a ground plane for the monopole and the
CPW; the second is as a radiating element; and the third is a component to form the distributed
matching network with the monopole, which results in the wideband impedance characteristics
compared to the conventional rectangular ground plane.
CONCLUSION
A triple-band microstrip antenna for WLAN/ WiMAX applications is proposed in this article.
By connecting a triangle with meandering at the top, a trapeziform ground plane, parasitic
elements, one horizontal & four vertical strips at the bottom of the triangle at an optimized offset
triple-band operation is attained. The measured results show that the antenna can cover the bands
of 5.2/5.8 GHz WLAN bands and partially 2.5/3.5/5.5 GHz WiMAX bands. Also, good similar
omni directional radiation patterns have been achieved. The proposed structure is of a simple
structure and compact size, and it is suitable candidate for wireless communication systems.