In general Micro strip antennas are also known as “ PRINTED ANTENNAS” In this paper we have proposed the modified design of SIERPINSKI CARPET for various purposes in Radar and Satellite applications. The CARPET is designed using Flame Retardant (FR4) substrate with thickness of 1.6 and dielectric constant 4.6 is used for design and fabrication purpose. High Frequency Structural Simulator (HFSS) is used for design purpose of modified Sierpinski Carpet. The simulated frequencies are 2.5GHZ , 5.8GHZ , 6.2GHZ and 7.4GHZ resulting in multiband operation.

1. A MODIFIED SIERPINSKI
CARPET FOR WIMAX,ISM
AND C-BAND APPLICATIONS
SRIRAM. S.R
BAALA GAJAKREEDAN. L

2. CONTENTS
• Introduction
• Fundamental parameters of antennas
• A Modified Sierpinski Carpet Antenna
• HFSS
• Design specification of sierpinski carpet antenna
• Analysis of sierpinski carpet antenna
• Results of sierpinski carpet antenna
• Application
• Conclusion
• References

3. Introduction
Antenna is defined as “a usually metallic device (as a
rod or wire) for radiating or receiving radio waves.” But as
for IEEE standard definitions of terms for antenna or aerial
as “a mean for radiating or receiving radio waves.”
 Regardless of antenna type, all
involve the same basic
principle that radiation is
produced by accelerated (or
de-accelerated) charges.

4. Fundamental parameters of
antennas
. Radiation pattern
. Isotropic,directional,and
omnidirectional pattern

5. . Field regions
> reactive near field region
> radiating near field region
> far field region
. Radiation intensity
. Directivity
. Gain
. Bandwidth
. S-parameter
. Z-parameter
. VSWR

6. A Modified Sierpinski Carpet Antenna
In general Micro strip antennas are also known as “ PRINTED
ANTENNAS”
In this paper we have proposed the modified design of SIERPINSKI
CARPET for various purposes in Radar and Satellite applications.
The CARPET is designed using Flame Retardant (FR4) substrate with
thickness of 1.6 and dielectric constant 4.6 is used for design and
fabrication purpose.
High Frequency Structural Simulator (HFSS) is used for design purpose
of modified Sierpinski Carpet.
The simulated frequencies are 2.5GHZ , 5.8GHZ , 6.2GHZ and 7.4GHZ
resulting in multiband operation.

7.  Modified Sierpinski Carpet
micro strip antennas are easy
to fabricate and comfortable
on curved surface .
 The directivity is fairly
insensitive to the substrate
thickness.
 Micro strip patch antennas
patches are in variety of
shapes ,such as rectangular ,
square, triangular and
circulator

8. . Fringing effect
. Effective length, Resonant
frequency and effective width

9. HFSS
. HFSS stands for high
frequency structure simulator
. ANSYS HFSS
software is the industry
standard for simulating 3-D
full wave electromagnetic
fields
Modes of operation
. HFSS 3D model
. Electrical CAD
interface
. HFSS 3D layout

10. ANSOFT HFSS
• Solution Type
Driven Model
Driven Terminal
Eignemode
• Parametric model
Generation
3D modelling
Overview of Draw (Snap,moving)
Material
View of Model
Boundary Condition
Assign Port
• Analysis Setup
Adapt Frequency
Convergence criteria
Initial Mesh options
Adaptive options
Low order Basis Function

11. • Results
• Solve loop

12. Design specification of Sierpinski
Carpet antenna
. 3D model
> Ground
> substrate
> microstrip line(feed)
> patch
> rectangular slots
. Assigning boundary
. Assigning excitation

13. Analysis of Sierpinski Carpet
antenna
. Analysis setup
> solution freq
> max number of passes
> max Delta S per pass
. Freq sweep
> starting freq
> attenuating freq
> number of counting
. Analyze

14. Results of Sierpinski Carpet antenna
> s-parameter

15. > Radiation Pattern

16. >3D Polar Plot

17. Conclusion
The Sierpinski carpet has found many applications
because of its compact size and unique recursive
design.
It can be used as mobiles antennas due to its compact
size and multiband frequency of operation.
This carpet is easy to design and fabricate.
On the other hand, increasing the number of rectangles
inside the carpet may result in reduction of frequency
bands.

18. References
 1. Huang, Y., & Boyle, K. (2008). Antennas: from theory to practice. Chichester:
Wiley.
 2. Sittironnarit, T., & Ali, M. (n.d.). Analysis and design of a dual-band folded
microstrip patch antenna for handheld device applications. Proceedings IEEE
SoutheastCon 2002 (Cat.No.02CH37283). doi:10.1109/.2002.995599.
 3. Joe, Allin, Pavithra, and Rajeshkumar. (2017). "A Compact Multiband Antenna
for WLAN and WiMAX Applications using Minkowski Fractal and Defected
Microstrip Structure." International Journal of Microwave and Optical
Technology, 12(3), 198-203.
 4. Kashwan, K. R., Rajeshkumar, V., Gunasekaran, T., & Kumar, K. R. (2011).
Design and characterization of Pin fed microstrip patch antennae. 2011 Eighth
International Conference on Fuzzy Systems and Knowledge Discovery (FSKD).
doi:10.1109/fskd.2011.6020028.
 5.Rajeshkumar, V., & Raghavan, S. (2014). Trapezoidal ring quad-band fractal
antenna for WLAN/WiMAX applications. Microwave and Optical Technology
Letters, 56(11), 2545-2548. doi:10.1002/mop.28631.
 6.V., R., & S., R. (2015). A compact metamaterial inspired triple band antenna for
reconfigurable WLAN/WiMAX applications. AEU - International Journal of
Electronics and Communications, 69(1), 274-280. doi:10.1016/j.aeue.2014.09.012.