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. The simulated results produce four frequency dips within 10GHZ range. WIMAX(2.5GHZ) , ISM band(5.8GHZ) , C-band Radar(6.2GHZ) and C-band Satellite(7.4GHZ).

1. A COMPACT MULTI BAND
ANTENNA FOR MOBILE
APPLICATIONS
GUIDED BY
ALLIN JOE D
ASSISTANT PROFESSOR – I L. BAALA GAJAKREEDAN – 14BEC201

2. DESIGN FORMULAS
 As the operating frequency increases, most of the electric field lines concentrate in the substrate. The value of εreff is given by,
where, εreff = Effective dielectric constant
εr = Dielectric constant of substrate
h = Height of dielectric substrate
w = Width of the patch
 The effective length of the patch (Leff) now becomes,
 For a resonance frequency f0, the Leff is
 Resonance frequency for any TMmnmode of rectangular patch antenna is given by,
 Where m and n are modes along L and W whereas W for an effective radiation is calculated using the formula given below,and the basic modes contibutes to maximum radiation

3. A Modified Sierpinski Carpet Design
 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.
 The simulated results produce four frequency dips
within 10GHZ range. WIMAX(2.5GHZ) , ISM
band(5.8GHZ) , C-band Radar(6.2GHZ) and C-band
Satellite(7.4GHZ).

4. S PARAMETER OF MODIFIED SIERPINSKI CARPET

5. MODIFIED CARPET WITH AND WITHOUT DMS

6. S PARAMETERS OF MADIFIED CARPET
WITH DMS WITHOUT DMS

7. ANTENNA
FABRICATION

8. TESTING RESULT

9. 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.
 Thus, the simulated results show the performance of with and without DMS implemented structure.
 The implementation of DMS resulted in improving the return loss value and the resulting antenna
parameters showed good performance in terms of GAIN and DIRECTIVITY.
 The DMS implemented antenna structure finds applications in WI-FI and WI-MAX areas.

10. 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.
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 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.

11. 6. V., R., & S., R. (2015). A compact metamaterial inspired triple band antenna for reconfigurable
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