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Parametric Trend Analysis of Miniature
Slotted Antenna with Dual-BandCharacteristics
K.S. Alimgeer, Shahid A. Khan, Z. Qamar, M. Zubair, R. M.
HashmiDepartment of Electrical Engineering, CIIT, Islamabad,
Pakistan
Department of Electronics & Information, Politecnico di
Milano, Italy
Email:khurram_saleem,shihidk,zeeshan.qamar,[email protected],[email protected]
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Abstract
Multiple frequencies are heavily in vogue tosupport multi-homed
high-end devices.
Inter-dependence of these resonating bands isneither mutually
exclusive nor easilycontrollable.
Slots if carefully manipulated can control the
interdependence of resonance frequencies. Simulated analysis of
these trends reflected by
placement of slots, or their dimensionalvariation, has been
presented.
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Abstract
Tune the operational frequencies, the higherfrequency bands pose
more difficulties andexhibit non-linear characteristics.
A novel technique is discussed in this paperwhich allows
controlling the tuning of highfrequency bands while keeping the
lower onesstable over a given frequency.
The simulated and measured results have beenpresented which are
in close resemblance,supporting the hypothesis.
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Index Terms
Controllable Multiband, MicrostripAntenna, Slotted Radiator,
Dimensional
Analysis.
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Proposed Geometrical Design
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Distribution of current over thepatch as affected by the
placement of slots
Slot#5
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Methodology
Vary the distance from the left edge andkeep the dimensions of
the slot as fixed
Vary the dimensions and keep the distancefrom left edge as
fixed
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Vary the distance from the left edge
and keep the dimensions of the slotas fixed
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Simulated results of S11 while varying theplacement of 1x4 mm
slot with step size of
1mm across the edges
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Return loss variations with the slot of2x4mm at
the distance is varied from 0 to 8mm
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Vary the dimensions and keep thedistance from left edge as
fixed
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Return loss of all dimensions at the distanceof 0 mm from left
edge of the patch
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Return loss variations with the slot length
and width adjustments and fixed distance of2mm from left edge of
the patch
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Optimum level of resonating bands achieved byplacement of slot
at 4 mm from the outer edge of
the radiating element parallel to the feeding edge.
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Network Analyzer Model
The prototype is verified for complianceusing Agilent PNA-X
Series Network
Analyzer Model-N5242
A in the RF-LabCOMSATS Institute of InformationTechnology,
Islamabad, Pakistan
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Measured values of S11 parameter forlower frequency and higher
band region for
2 x 4 mm slot at distance of3mm from leftedge
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Simulated radiation pattern for2 x 4 mmslots at distance of3mm
from left edge
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Conclusion Trend analysis suggesting a new technique that
can be used for carrying out coarse and finetuning of the
frequency bands for dual-bandoperation in microstrip antennas.
Control higher frequency band in dual-bandoperation. Simulation
and prototype basedanalysis has been presented to explain
theobserved trends and support the conclusions.
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Conclusion
The placement of slots can be varied to controlthe higher order
frequency bands while thedimensions of the slots can be used to
controlthe return-loss of the resonating bands.
However, the two factors are not independentand exhibit a slight
empirical relation, whichhas also been presented.
The technique can be used as a tool for having
controllable high frequency resonanceoperation and ease-out the
selection of centrefrequencies for antennas in high-end
electronicdevices.
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0
Thank you
You may ask any question at anyof the following email adders
[email protected] [email protected]
[email protected] [email protected]
+923335114498skype ID=ksalamgir
