Wideband textile antenna for WLAN and WIMAX applications
Antennas that available in the industry have designed for one purpose application with narrow band which makes the system functions with more than one antenna with a narrow band. Additionally, most existing wideband antennas are not flexible since it uses traditionally rigid material that make...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English English English |
| Published: |
2021
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/6958/1/24p%20FARHAN%20AHMED%20YUSUF.pdf http://eprints.uthm.edu.my/6958/2/FARHAN%20AHMED%20YUSUF%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/6958/3/FARHAN%20AHMED%20YUSUF%20WATERMARK.pdf http://eprints.uthm.edu.my/6958/ |
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| Summary: | Antennas that available in the industry have designed for one purpose application with
narrow band which makes the system functions with more than one antenna with a
narrow band. Additionally, most existing wideband antennas are not flexible since it
uses traditionally rigid material that make them uncomfortable to the user. Therefore,
a new technology becomes necessary by designing wideband textile antenna with
flexible substrates and cost efficiency. The substrate of the designed antennas is made
from denim textile material with size of 45x70 mm, while radiating element and partial
ground plane are made from copper tape with circular patch radius of 20.9 mm and
feed line of 2.9x20.3 mm. The partial ground has a size of 40x19.65 mm in the lower
part of the antenna. The patch has two feed slots with size of 2.80x2.99 mm and in the
middle of the circular the is square diamond with size of 8.90 mm and upper square
diamond with of 5.49 mm. The design is used both CST and validated by HFSS. The
operating frequency of the design is from 2 to 4 GHz with reflection coefficient of -
29.346 dB. It has a gain of 2.378 dB at 2.45 GHz and 3.453 dB at 3.5 GHz. Validated
results are compared with CST simulations and acceptable agreement was observed.
Furthermore, in this project was analyzed the bending effect of the antenna with radius
from 10 to 125 mm and its SAR. The SAR value of the antenna was tested, based on
flat and bended antenna to show the radiation effect on the human body phantom, in
the case of flat antenna the SAR value is 1.255 W/kg at 2.45 GHz and 1.302 W/kg at
3.5 GHz. Nevertheless, the bended SAR value shows 1.68 at 2.45 GHz and 1.88 W/kg
at 3.5 GHz. The SAR values of both antennas are safe according to the International
Commission on Non-Ionizing Radiation Protection (ICNIRP, European standard). The
safe level for the standard is 2 W/kg for any 10 grams of tissue. |
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