volume | PIER Journals

2011-04-28

Ultra-Wide Bandwidth Microstrip Monopole Antenna by Using Electromagnetic Band-Gap Structures

Dalia Mohammed Nasha Elsheakh,

Dr. Dalia Mohammed Nasha Elsheakh

Electrical Department, Faculty of Engineering and Technology

Badr University in Cairo

Egypt

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Hala Elsadek,

Dr. Hala Elsadek

Microstrip Department

Electronics Research Institute

Egypt

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Esmat A. F. Abdallah,

Dr. Esmat A. F. Abdallah

Microstrip Department

Electronics Research Institute

Egypt

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Hadia El-Hennawy,

Professor Hadia El-Hennawy

Electronics and Communications Dept.

Ain Shams University

Egypt

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Magdy F. Iskander

Dr. Magdy F. Iskander

Hawaii Center for Advanced Communications

University of Hawaii

USA

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Progress In Electromagnetics Research Letters, Vol. 23, 109-118, 2011

doi:10.2528/PIERL11020805

Abstract

A novel compact design for ultra-wide bandwidth (UWB) planar monopole antenna is presented in this paper. The basis for achieving the UWB operation is through using semicircular microstrip monopole antenna with modified ground plane in the form of semi circular umbrella like shape. This shape produces bandwidth ranging from 3 to 35 GHz with discontinuities from 7 GHz to 10 GHz, from 12.5 GHz to 17.5 GHz and from 22 GHz to 40 GHz. The antenna size is reduced by 27% relative to the size of conventional rectangular monopole patch antenna. Metamaterial structures are used for further antenna performance improvement. Two types of metamaterial namely EBG and DGS are studied. First, embedding metallo EBG (EMEBG) is used to eliminate ripples in the operating band and also further reducing the antenna size by more than 30% as compared to the proposed patch. The antenna design provides an impedance bandwidth of more than 33 GHz. Second, four arms spiral defected ground structure (SDGS) is used as a ground plane with four arms to further improve the antenna performance. The SAMC reduced the antenna size by more than 48% as compared to the proposed antenna patch, increased bandwidth, and decreased the cross polarization effect. Finally, embedded EBG together with SDGS ground plane are studied to take advantages of both techniques.

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Dalia Mohammed Nasha Elsheakh, Hala Elsadek, Esmat A. F. Abdallah, Hadia El-Hennawy, and Magdy F. Iskander, "Ultra-Wide Bandwidth Microstrip Monopole Antenna by Using Electromagnetic Band-Gap Structures," Progress In Electromagnetics Research Letters, Vol. 23, 109-118, 2011.
doi:10.2528/PIERL11020805

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