A NOVEL WIDE-BAND MICROSTRIP YAGI-UDA ARRAY ANTENNA FOR WLAN APPLICATIONS | Zendy

Mohammad Bemani | Zendy; Saeid Nikmehr | Zendy

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A NOVEL WIDE-BAND MICROSTRIP YAGI-UDA ARRAY ANTENNA FOR WLAN APPLICATIONS

Author(s) -

Mohammad Bemani,

Saeid Nikmehr

Publication year - 2009

Publication title -

progress in electromagnetics research b

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.208

H-Index - 47

ISSN - 1937-6472

DOI - 10.2528/pierb09053101

Subject(s) - hfss , microstrip antenna , antenna measurement , antenna gain , computer science , return loss , radiation pattern , antenna (radio) , antenna factor , antenna efficiency , dipole antenna , patch antenna , electronic engineering , acoustics , telecommunications , physics , engineering

This paper presents a design of Wide-Band Microstrip Yagi-Uda antenna with high gain and high front to back (F/B) ratio. Numerical and measured results of our design show more than 18dB front to back ratio at 5.5GHz and no backward radiation at 5.2GHz. An impedance bandwidth of 22.05% was achieved around 5.5GHz. The antenna gain (10{12.4dBi) can be varied to be suitable for various applications. Measured return loss and radiation pattern of this antenna is presented to validate the results of simulations by two methods. The flrst method based on flnite element method (FEM) and the second one based on flnite integral technique (FIT) were used to analyze antenna structure, and subsequently the Genetic Algorithm (GA) was applied by using HFSS simulator to obtain the optimized parameters. In order to flnd the best design method for this antenna, the efiect of distance between the parasitic elements of proposed antenna was studied. Finally two microstrip Yagi-Uda array antennas were combined to increase the gain of antenna. To demonstrate the major beneflts, a comparison of our initial and flnal designs of Yagi-Uda antenna is provided.

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