and it has a high gain. The structure introduced is based on
the slots placed on the edges and center of the patch. The
central frequency of antenna is related to the position and
dimensions of these slots to a great extent. The design intro-
duced for variability is explained. The proposed design is
verified by simulated and measured results.
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How to cite this article: Asadpor L, Nazari F. Two
layer reconfigurable coaxial-fed antenna for S-band
and GPS applications. Micro w Opt Technol Lett.
2017;59:2141–2147. https://doi.org/10.1002/mop.30691
Received: 18 February 2017
DOI: 10.1002/mop.30698
A novel Koch and Sierpinski
combined fractal antenna for
2G/3G/4G/5G/WLAN/
navigation applications
Zhen Yu
1,2,3
|
Jianguo Yu
1,2
|
Xiaoying Ran
3
|
Chenhua Zhu
1
1
School of Electronic and Engineering, Beijing University of Posts and
Telecommunications, Beijing 100876, China
2
Beijing Key Laboratory of Work Safety Intelligent Monitoring,
Beijing 100876, China
3
North China Institute of Science and Technology, Langfang 101601, China
Correspondence
Zhen Yu, School of Electronic and Engineering, Beijing University of Posts
and Telecommunications, Beijing 100876, China.
Email: Yzyuzhen@ncist.edu.cn
Abstract
A novel Koch Snowflake and Sierpinski Carpet com-
bined fractal multiband antenna is proposed for 2G/3G/
4G/5G/WLAN/Navigation wireless applications in the
paper, which is based on the principles of conventional
micros trip monopole antenna and resonant coupling
technique, combined with the advant ages of fractal
geometry. The antenna ha s the combination radiator of a
two iteration K och snow flake fractal with a four iteration
Sierpinski Carpet fractal slotted inside, and a six edges
ring resonator on back side to generate six resonant fre-
quencie s. The antenna covers more than ten mob ile
applications in six frequency bands with a bandwidth of
12.2% (0.85–0.96 GHz) for GSM900 and CDMA2000,
23.2% (1.22–1.54 GHz) for TD-LTE (B-TrunC), 13.1%
(1.86–2.12 GHz) for LTE33-37 and TD-SCDMA, 29.9%
(2.4–3.22 GHz) for ISM2.4G, Bluetooth, GPS, COM-
PASS, GLONSS, GALILEO, WLAN, 7.3% (3.69–
3.97 GHz) for LTE42/43 and WiMA X, 21.1% (4.84–
5.98 GHz) for WLAN and 5G systems. The proposed
antenna is fabricated on FR4 substrate, the size is
80*54*1.6 mm
3
. The measured results reveal that the
omnidirectional radiation patterns with 22.9 to 4.64 dBi
gain. The good agreement between the measurement
results and the simulatio n resu lts validate that the pro-
posed design approach meet the requirements for various
wireless applications.
YU ET AL.
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