A-shaped antenna for WLAN &WiMAX applications

1. REPRESENTED BY
PRERONA SANYAL
BCREC, DURGAPUR
1
*
ICRIEECE 2018, BHUBANESHWAR

2. 2
*Introduction
*MICROSTRIP PATCH ANTENNA
*Proposed antenna design
*Modified antenna design
*Results (S-parameter)
*Parametric results
*Conclusion
*Reference

3. 3
*
* Microstrip antennas are planar resonant cavities that radiates from their edges.
*Microstrip antenna are popular for low profile applications.
*Linear and circular polarization can be achieved effortlessly.
*Microstrip antennas are usually used for Ultra High Frequencies (UHF) & High
Frequencies (HF) because of the antenna size is tightened to the wavelength at the
resonant frequency.
*It provides better efficiency, larger bandwidth & better radiation.

4. 4
*
*Also known as “PRINTED ANTENNAS”, which consisting of a radiating patch on one
side of the dielectric substrate having a ground plane on the other side .
*Useful for high performance in extreme applications: aircraft, satellite, missiles,
cellphones and electronic devices.
*PROS:
*Cost effective, easy to fabricate, mechanically robust and very versatile.
*Capable of dual & triple frequency operations.
*CONS:
*Irrelevant radiation from feeds and from junctions.
*Poor scanning properties and very narrow frequency bandwidth.

5. 5
*

6. 6
*
*In this paper, two structural designs have been propose, the basic schematic structure
of the microstrip patch antenna is:
Basic structure of the antenna Dimensions for the basic
design
Parameters Dimensions
(mm)
c 2.5
d 4
f 1.5
g 7.5
h 7
i 3
Fx 13.5
Fy 13.5

7. 7
*
*In the modified design, to achieved broadband operation miniaturization is obtained by
etching two rectangular slots, while converting a rectangular patch into a “A-shaped”
Proposed structure of the A-shaped antenna Dimensions of the modified design
Parameter
s
Dimension
s
(mm)
c 2.5
d 4
e 1.5
f 1.5
g 7.5
h 7
i 3
j 4
Fx 13.5
Fy 13.5

8. 8
*
Parameters Dimensions
(mm)
i 4
k 11.7
m 3.8
p 14.8
q 13.5
r 7.5
o 1
n 1.2
Schematic diagram of the ground
plane of the proposed antenna
embedded with rectangular slots.
Dimensions of the mentioned
design

9. 9
*
*From the modified antenna obtained an impedance bandwidth of 3.663 GHz with
RL of 17.21dB. S-parameter of the antenna states that it covers the WLAN &
WiMAX application band within the impedance bandwidth.
Magnitude of S-parameter vs frequency Magnitude of gain vs frequency

10. 10
*
*Accumulated frequencies can be used for S-band communications.
*Particle accelerators may be powered by S-band RF sources. The frequencies are
then standardized at 2.998 GHz (Europe) or 2.856 GHz (US).
* IEEE 802.16a and 802.16e standards utilize a part of the frequency range of S
band.
* S-bands’ properties are so unique that this band is mainly used for radar systems.
*Technology may be used for real time data & status for traffic and weather
conditions.

11. 11
*
Variations of right arm to achieve the upper portion frequencies of wideband response.

12. 12
*
Variations of left arm to achieve the lower cut-off frequencies of wideband response

13. 13
*
Variation of the top arm which shows cut-off frequencies

14. 14
*
SLOT 1 VARIED KEEPING SLOT 2
CONSTANT
SLOT 2 VARIED KEEPING SLOT 1
CONSTANT

15. 15
*In this paper a combination of A-shaped slot which is etched over the top
surface and rectangular slots are used for this purpose.
*The 10 dB impedance bandwidth of the proposed antenna is 3.663 GHz
(3.152GHz-6.815GHz).
* Compactness of the antenna is achieved by embedding two slots at the ground
plane.
*From the desired frequencies obtained this A-shaped antenna can be used for
the applications of WLAN and Wi-MAX bands.
*

16. 16
*
*Jaewon Lee, Seokjinhong, Jaewoong Shin, and Jaehoonchoi, “A compact
ultrawideband monopole antenna for wireless communication application”, IEEE
transactions on antennas and propagation, vol.57,no. 9,pp. 2785-2788, September
2009.
*Wen-Shanchen and Kuang-Yuanku, “Band-rejection design of the printed open slot
antenna for wlan/wimax operation”, IEEE transactions on antenna and propagation,
vol. 56, no 4,pp.1163-1169, April 2008.
*T. Aboufoul, R.Bharadwaj and A.Alomainy, “Reconfiguration of ultra wideband
antenna for milti-band operation in cognitive radio application”, Conference on
antenna and propagation EUCAP,978-88-90701 2014.
*Kin-Luwong and Wen-Hsiuhsu, “A broad-band rectangular patch antenna with a pair
of wide slits” IEEE transactions on antennas and propagation, vol 49, no. 9, pp.
1345-1347, september 2001.
*Kalyan Mondal and Partha pratim Sarkar, “M-shaped broadband microstrip patch
antenna with modified ground plane”, Microwave and optical technology letters.
vol.57, no. 6, pp. 1308-1312, june 2015
*H-W. Liu and C.-F.Yang, “Miniature broadband antenna for Wlan/Wimax and lower-
band UWB applications”,Electronics letters19thNovember 2009 vol.45 no.24.

17. 17
THANK YOU
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