ctb2020-332 ,multiband wireless antenna
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8/6/2019 Ctb2020-332 ,Multiband Wireless Antenna
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National Conference on Converging Technology 2020 (CTB-2020), April 6, 7, 2011
Kurukshetra University, Kurukshetra
MULTIBAND PATCH ANTENNA FOR
WIRELESS APPLICATIONS1
Pradeep Kumar,2
Monish Gupta,3
Nikhil Marriwala,4
C.C.Tripathi1MTech ECE Student, 2,3Assistant Professor, 4AssociateProfessor,1,2Department of Electronics and Communication Engineering, U.I.E.T, Kurukshetra University, Kurukshetra
Email: 1 pkuk2011@gmail.com
Abstract: A new design multiband Microstrip patch antenna is
introduced. The antenna is designed for wireless application
covering 1-6.5 GHz frequency range is presented .It is
demonstrated that by using two slits and partial ground plane a
wideband operation can be achieved. A copper patch has been
integrated with fr4 epoxy substrate and partial ground plane.
The operating frequencies are 1GHz, 2.4 GHz, 5GHz, and
6.5GHz with return loss -20 db,-21db,-29db,-14db,-16db
respectively. A substrate of low dielectric constant (εr = 4.4) is
selected to obtain compact radiating structure that meets the
demanding bandwidth.
Keywords: Multiband, Patch Antenna, Wlan, C-Band
I. INTRODUCTION
The basic structure of Microstrip patch antenna consist of a
dielectric substrate sandwiched between metal patch on one
side and metal ground plane on other side. Due to its small
size, low profile planar configuration, low fabrication cost andcapability to integrate with microwave circuits.[1] Therefore
the Microstrip patch antenna is very well suited for wireless
communication systems application, cellular phones, radars
system and satellite communication system etc.[2-3]
Figure 1: The Basic Geometry of Antenna Is shown
The 1.2 GHz frequency of L-Band is allocated to satellite
communications on Inmarsat L-Band is also used for low
earth orbit satellites, military satellites, and terrestrial wireless
connections like GSM mobile phones. It is also used as an
intermediate frequency for satellite TV where the Ku or Ka
band signals are down-converted to L-Band at the antennaLNB, to make it easier to transport from the antenna to the
below deck, or indoor equipment. Since there is not much
bandwidth available in L-band, it is a costly commodity
IEEE 802.11 is a set of standards for implementing wireless
local area network (WLAN) computer communication in the
2.4, 5 GHz frequency bands. The 802.11a standard uses the
same data link layer protocol and frame format as the original
standard, but an OFDM based air interface (physical layer). It
operates in the 5 GHz band with a maximum net data rate of
54 Mbit/s [12]
Satellite C-band usually transmits around 6.5 GHz and
receives around 4 GHz. It uses large (2.4- 3.7 meter) antennas.These are the large white domes that you see on top of the
cruise ships. C-band is typically used by large ships that
traverse the oceans on a regular basis and require
uninterrupted, dedicated, always on connectivity as they move
from region to region. The shipping lines usually
lease segment of satellite bandwidth that is provided to the
ships on a full time basis, providing connections to the
Internet, the public telephone networks, and data back-hauls to
their head office. C-band is also used for terrestrial microwave
links, which can present a problem when vessels come into
port and interfere with critical terrestrial links. This has
resulted in serious restrictions within 300Km of the coast.
Narrow bandwidth in Microstrip patch antenna is a major
disadvantage, but there are numerous and well known
methods to increase the bandwidth of antenna. These includes
increase of substrate thickness, the use of low dielectric
substrate, the use of multiple resonators etc. However the
bandwidth and size of an antenna generally mutually
conflicting properties that is improvement of one of the
characteristics normally degradation of other. [4-5]
Organized By:
University Institute of Engineering and Technology, Kurukshetra University Kurukshetra
8/6/2019 Ctb2020-332 ,Multiband Wireless Antenna
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National Conference on Converging Technology 2020 (CTB-2020), April 6, 7, 2011
Kurukshetra University, Kurukshetra
Recently several techniques have been proposed to enhance
the bandwidth. in utilizing the shorting pins or shorting walls
on the unequal arms of u-shaped patch .L-probe feed patch
antenna and other techniques involves employing multilayer
structure with parasitic patches of various geometry such asE,V and H shapes which excites multiple resonant modes
.However these antennas are generally fabricated on thicker
substrate.
Here we proposed an alternative method to achieve multiband
without using stack patch structure and it works well on all of
the frequencies. The proposed antenna works on four
frequencies. A copper patch is designed and two identical slits
are cut out form patch to make it multi band .the patch is fed
by a Microstrip line with 50Ω impedance. The partial ground
plane is also help in making it wideband.
II. DESIGN OF ANTENNA
The Basic Geometry Of Antenna Is Shown In Figure 1,Fr4
Epoxy substrate of permittivity r=4.4 is sandwichedƐ
between aluminum ground plane and copper patch .two slits
S1 & S2 are cut out from the patch near the feed line to match
the impedance. The slits S1 and S2 are identical and
equidistant from the Microstrip feed line as shown in figure
.the partial ground plane and two slits make the wide band
antenna .the proposed antenna was investigated by
transmission line model and simulated using ANSOFT HFSS
Simulation.
Figure 2: Proposed patch antenna geometry
The proposed antenna geometry is shown in figure 2.Table 1
shows the dimensions of the proposed antenna along with
materials used .the actual design structure is shown in figure
3and figure 4 shows the partial ground plane under the patch
antenna. Figure 3 and 4 are designed in HFSS SOFTWARE
vs. 10.
Table 1: The Antenna parameters.
Ground Substrate
Patch Microstrip
Length
25 50 32 13
Width 35 35 18 3
Height
0.2 1.6 0.02 0.02
Material
Aluminum FR4epoxy
Copper Copper
Figure 3 Actual antenna structure
Organized By:
University Institute of Engineering and Technology, Kurukshetra University Kurukshetra
8/6/2019 Ctb2020-332 ,Multiband Wireless Antenna
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National Conference on Converging Technology 2020 (CTB-2020), April 6, 7, 2011
Kurukshetra University, Kurukshetra
Figure 4: Partial ground plane under the substrate
III. RESULTS AND DISCUSSIONS
Figure 5: The Return losses (S11 parameter) vs. frequency
The Return losses (S11 parameter) vs. frequency is shown in
which shows the 1.2 ghz,2.4ghz,4ghz,6.5ghz frequencies on
which the antenna shows the resonance
Figure 6: Impedance plot of antenna
The impedance plot of antenna is shown in figure 6 which
shows the resonance of antenna on 1.2 GHz ,2.4ghz ,4ghz ,
6.5ghz frequencies.teh impedance is real and and high values
in entire range .
Figure 7: Radiation pattern at θ = 0 degree
Organized By:
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8/6/2019 Ctb2020-332 ,Multiband Wireless Antenna
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National Conference on Converging Technology 2020 (CTB-2020), April 6, 7, 2011
Kurukshetra University, Kurukshetra
Figure 8: Radiation pattern at θ = 90 degree
The figure 7 and 8 shows the radiation pattern of antenna
different angles of theta. The radiation pattern shows the
wideband of proposed antenna at different elevation angles.
Figure 9: Polarization Graph of Antenna
Figure10: Axial ratio Graph of Antenna
The figure 9 and 10 shows the polarization and axial ratio
graph of antenna. the 3D polar plot of radiation pattern is
shown in figure 11.
Figure 11: 3d polar plot of radiation pattern of antenna
IV. CONCLUSION & SCOPE
Organized By:
University Institute of Engineering and Technology, Kurukshetra University Kurukshetra
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National Conference on Converging Technology 2020 (CTB-2020), April 6, 7, 2011
Kurukshetra University, Kurukshetra
A multiband antenna by cutting two slits in patch and by using
partial ground plane for increasing bandwidth for 1.2 GHz, 2.4
GHz, 4 GHz 6.5 GHz wireless application has been presented
and discussed. it has also shown that using a partial ground
plane achievement of multiband eliminate the need to designantenna using stacked structure without increasing vertical
dimension of antenna.
Proposed antenna has been designed for easy integration with
existing wireless devices and can be used for transmitting and
receiving RF signals in L & C band satellite.
REFRENCES
[1] M. F. Hasan, “A New Compact Dual Band GPS Patch Antenna Design
Based on Minkowski-Like Pre Fractal Geometry”, Eng. & Tech. Journal, Vol.
27, No.7, 2009.
[2] M. T. Islam, M. N. Shakib, N. Misran, T. S. Sun “Broadband Microstrip
Patch Antenna”, European Journal of Scientific Research, Vol.27 No.2,
pp.174-180, 2009.
[3] Y. Bhomia, A. Kajla and D. Yadav, “Slotted Right Angle Triangular
Microstrip Patch Antenna”, International Journal of Electronic Engineering
Research, Vol. 2 No.3 ,pp. 393–398, 2010
[4] V. K. Singh, Z. Ali ,“Dual Band U- shaped microstrip antenna for wireless
Communication”, International Journal of Engineering Science and
Technology, Vol. 2(6), 1623-1628, 2010.
[5] B.K. Ang and B.K. Chung, “A Wideband E-Shaped Microstrip PatchAntenna for 5–6GHz Wireless Communications”, Progress in
Electromagnetics Research, PIER 75, 397–407, 2007.
[6] M. F. Islam, M. A. Mohd. Ali, B. Y. Majlis & N. Misran “Dual Band
Microstrip Patch Antenna for SAR Applications”, Australian Journal of Basic
And Applied Sciences, Vol.4 (10), pp. 4585-4591, Malaysia, 2010.
[7] B. R. Rao, E. N. Rosario, M. S. Mahmoud, J. I. Simon, “Compact Co-
Planar Dual-Band Microstrip Patch Antennas for Modernized GPS”,
Proceedings of the 22nd International Technical Meeting of SDIN ,pp.351-
358, Sept. 22 - 25, 2009.
[8] B. Paul , S.Mridula, C.K.Aanandan, K.Vasudevan, P.Mohanan,
“Octagonal Microstrip Patch Antenna For Dual Band Applications”, Centrefor Research in Electromagnetics and Antennas (CREMA), Cochin University
of Science and Technology, URSI(Poster presentation), 2005.
[9] R. Kumar Vishwakarma1, S. Tiwari, “Dual-band stacked rectangular
microstrip antenna for mobile applications”, School of Studies in Electronics,
Pt. Ravishankar Shukla University, Raipur (C. G).
[10] H. F. AbuTarboush, H. S. Al-Raweshidy “Connected E-Shape and U-
Shape Dual- Band Patch Antenna for Different Wireless Applications”,
Wireless Networks & Communications Group (WNCG) School of
Engineering & Design, Brunel University, West London, UK
[11] www.ansoft.com/products/hf/hfss.
[12] www.ieee802.org/802info.html.
Organized By:
University Institute of Engineering and Technology, Kurukshetra University Kurukshetra
8/6/2019 Ctb2020-332 ,Multiband Wireless Antenna
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National Conference on Converging Technology 2020 (CTB-2020), April 6, 7, 2011
Kurukshetra University, Kurukshetra
Organized By:
University Institute of Engineering and Technology, Kurukshetra University Kurukshetra
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