Single band pifa
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Transcript of Single band pifa
Design and Fabrication of a compact single band Planar Inverted
F-Antenna
Presented By :
Hrudya
M.Tec ECE
AbstractAbstract An Antenna converts electromagnetic radiation into electric current, or
vice versa.
Need of Antenna :
For transmission and reception of the radio signal.
Wireless performance is completely dependent on a high performance antenna design
and implementation.
PIFA antenna structure is one of the most promising candidate in the
category of antennas used in handheld devices.
The proposed antenna is simulated with commercially available
software Ansoft HFSS.
The dimensions of the antenna is designed and optimized to meet the
required characteristics.
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Principle of operationPrinciple of operation
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The patch acts approximately as a resonant cavity (short circuit
walls on top bottom and side, open-circuit walls on the other side).
If the antenna is excited at a resonant frequency, a strong field is set
up inside the cavity, and a strong current on the surface of the
patch.
The electric fields that extend out from the open circuit edge of
PIFA (called fringing felids ) causes PIFA to radiate.
This produces significant radiation.
Basic Equation Basic Equation L1 + L2-W = λ/4 (1)
Where L1 is Top patch length
L2 is Top patch Width
λ is wavelength corresponding to resonant frequency
But λ = c/f
PIFA sits on top of a dielectric substrate with permittivity €r
L1 + L2-W = c /4f√€r
When W/L2=1 then
L1 = λ/4
(2)
When W=0 then
L1 + L2 = λ/4
(3)
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Advantages
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The Low weight and small volume.
Low fabrication cost.
Mechanically robust.
Capable of dual and triple frequency operations.
Geometry allows electronic peripherals to wedge in between the
spaces .
Software used to design the Software used to design the antennaantenna
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The HFSS stands for High Frequency
Structural Simulator.
HFSS is commercial finite element method
solver for electromagnetic structures from
Anasys Corp.
It is one of the several commercial tools
used for antenna design
Detailed DimensionsDetailed Dimensions
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Parameter Value (mm)
Lg 120
Wg 50
Lp 50
Wp 21
Hs 10
Ws 1
Hsub 1.6
Conclusion and Future Scope Conclusion and Future Scope
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Few conclusions drawn from this work are:
Agreement between simulation results and measurement data is
good.
The designed single-band antenna, built on PIFA structure, is very
sensitive to any changes to the dimensions of the structure including
the ground plane.
Only precise fabrication can yield the simulated results . Even small
changes in dimensions can affect the performance significantly.
Future Scope:
The design proposed here can be extended for supporting multi band
applications .
ApplicationsApplications
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The proposed antenna covers GSM 800 (890 to 915 MHz ) band.
Used in Mobile Communication System.(800 MHz).
ReferencesReferences[1] Kin-Lu Wong, “Planar Antennas for Wireless Communication”, Published John Wiley & Sons, Inc., Chapter: 2,
Page(s): 26-65, 2003.
[2] P. S. Hall, E. Lee, and C. T. P. Song, “Planar inverted-F antennas,” in Printed Antennas for Wireless Communications, R. Waterhouse, Ed. Hoboken, NJ: Wiley, 2007, ch. 7
[3] Naveen Kumar , Garima Saini ,A Novel Low profile Planar Inverted-F Antenna (PIFA) for Mobile Handsets,International Journal of Scientific and Research Publications, Volume 3, Issue 3, March 2013.
[4] Hang Wong, Kwai-Man Luk, Chi Hou Chan, QuanXue, Kwok Kan So, HauWah Lai, “Small antennas in Wireless Communications”, Proceedings of the IEEE Journal, July 2012.
[5] Ray J.A, Chaudhuri S.R.B., “A review of PIFA technology”, IEEE Indian Antenna week (IAW),Dec. 2011.
[6] Belhadef, Y.; BoukliHacene, N., “PIFAS antennas design for mobile communications”, 7th IEEE International Workshop on Systems, Signal Processing and their Applications (WOSSPA), May 2011.
[7] SinhyungJeon, Hyengcheul Choi, and Hyeongdong Kim, “Hybrid Planar Inverted-F Antenna with a T-shaped slot on the ground plane”, ETRI Journal, Vol. 31, October 2009.
[8] Krzysztofik, W.J.; Skikiewicz, A., “Tapered PIFA Antenna for Handsets Terminals”, 17th IEEE International Conference on Microwaves, Radar and Wireless Communications (MIKON), May 2008.
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