Enhancement of Microstrip Monopole Antenna Bandwidth by Using EBG Structures

Author

Elsheakh, D.N. ; Elsadek, H.A. ; Abdallah, E.A. ; Elhenawy, H. ; Iskander, M.F.

Author_Institution

Hawaii Center for Adv. Commun., Univ. of Hawaii at Manoa, Honolulu, HI, USA

Volume

8

fYear

2009

fDate

7/1/1905 12:00:00 AM

Firstpage

959

Lastpage

962

Abstract

A novel compact design for UWB planar monopole antenna is presented in this letter. The basis for achieving the UWB operation is through using semicircular microstrip monopole antenna with circular modified ground plane. This shape produces bandwidth ranging from 3 to 35 GHz with discontinuities in certain bands from 7 to 10 GHz and from 12.5 to 17.5 GHz. The antenna size is around 27% of the size of a conventional rectangular microstrip patch antenna. Electromagnetic band-gap (EBG) structures are used for further improve the antenna performance. It is shown that by embedding metallo-EBG structure (MEBG) such as circular and square patches, it is possible to eliminate ripples in the operating band and still achieve a reduction in the antenna size to more than 60% from conventional patch. The final antenna design provides an impedance bandwidth (S11 <-10 dB) of more than 33 GHz with averaged radiation efficiency of 73%-74% and antenna gain of 6.5 dBi.

Keywords

antenna radiation patterns; microstrip antennas; monopole antennas; photonic band gap; planar antennas; ultra wideband antennas; UWB planar antenna; electromagnetic band gap structure; frequency 3 GHz to 35 GHz; impedance bandwidth; metallo-EBG structures; microstrip monopole antenna bandwidth; radiation efficiency; rectangular patch antenna; Electromagnetic band-gap (EBG) and metallo electromagnetic band gap structure (MEBG); microstrip monopole antenna; size reduction; ultrawideband (UWB);

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2009.2030375

Filename

5208271