Int. J. of Wireless and Mobile Computing   »   2015 Vol.8, No.1

 

 

Title: A new WiFi microstrip antenna designed by differential evolution

 

Authors: Sanyou Zeng; Yuhong Jiang; Zhu Liu; Yong Wu; Dayue Guo; Lunan Qiao; Zhiqun Liu

 

Addresses:
School of Computer Science, China University of Geosciences, China
School of Computer Science, China University of Geosciences, China
School of Computer Science, China University of Geosciences, China
School of Computer Science, China University of Geosciences, China
School of Computer Science, China University of Geosciences, China
School of Computer Science, China University of Geosciences, China
School of Computer Science, China University of Geosciences, China

 

Abstract: This paper presents a new WiFi microstrip antenna in 2.4 GHz band by using the differential evolution (DE). The antenna is small with less than a quarter-wavelength. The geometric structure is formed by a square patch grounded with a substrate and cut by two adjacent rectangles from an edge, and a microstrip feed line printed on the other side of the grounded substrate. The structure is parameterised as a solution vector, and the requirements of the antenna are coded as objective and constraints. Then a constrained optimisation problem is formulated. Some optimised antennas are found, which meet the requirements in the simulation. Prototypes of an optimised antenna within a size of 25 × 25 × 1.6 mm³ are fabricated. The measured performance matches the simulated one as a whole. One antenna was mounted to a wireless router and another one to a personal computer for indoor use. And we found they worked well. The fabricated antenna can be applied in the space limited within 25 × 25 × 1.6 mm³.

 

Keywords: WiFi antenna; microstrip antenna; constrained optimisation; differential evolution; wireless routers; antenna design; simulation.

 

DOI: 10.1504/IJWMC.2015.066757

 

Int. J. of Wireless and Mobile Computing, 2015 Vol.8, No.1, pp.45 - 50

 

Submission date: 13 Jul 2014
Date of acceptance: 20 Aug 2014
Available online: 02 Jan 2015

 

 

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