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J Electromagn Eng Sci > Volume 17(2); 2017 > Article
Journal of Electromagnetic Engineering and Science 2017;17(2):57-64.
DOI: https://doi.org/10.5515/JKIEES.2017.17.2.57   
Compact Mobile Quad-Band Slot Antenna Design for GPS L1, WiMAX, and WLAN Applications
Haiyan Piao1, Yunnan Jin1, Jinpil Tak2, Jaehoon Choi1
1Department of Electronics and Computer Engineering, Hanyang University
2Department of Electronics and Computer Engineering, University of Arizona
Correspondence:  Jaehoon Choi,Email: choijh@hanyang.ac.kr
Abstract
In this paper, an asymmetric compact multiband slot antenna is proposed for global positioning system (GPS), worldwide interoperability for microwave access (WiMAX), and wireless area network (WLAN) applications. The top plane, a ground is composed of a rectangular slot with a trapezoidal-like stub, an inverted U-shaped slot at the right side of the rectangular slot, an inverted L-shaped slot at the left side of the rectangular slot, and three stubs. The proposed antenna is fed by an asymmetric cross-parasitic strip on the bottom plane. By properly designing the slots and stubs, four resonant frequency bands are achieved with -10 dB reflection coefficient bandwidths of 50 MHz, 400 MHz, 390 MHz, and 830 MHz in the 1.57 GHz GPS band, 2.4 GHz WLAN band, 3.5 GHz WiMAX band, and 5.5 GHz WLAN bands, respectively. The antenna has a total compact size of $13mm{times}32mm{times}0.8mm$. Simulated and measured results indicate that the proposed antenna has sufficient bandwidth and good radiation performance in each band.
Key words: GPS, Quad-Band, Slot Antenna, WiMAX, WLAN

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