A Novel Broadband Modified Monopole by the Use of a Parasitic Conical Skirt

Author

Filho, C. A B Saunders ; Dias, M.H.C. ; Santos, J.C.A.

Author_Institution

Center for Commun. & Electron. Warfare, Brazilian Army, Brasilia, Brazil

Volume

11

fYear

2012

fDate

7/4/1905 12:00:00 AM

Firstpage

1249

Lastpage

1252

Abstract

Parasitic structures around a narrowband antenna may lead to significant bandwidth broadening. For instance, staircase metallic rings around a monopole antenna have been successfully used recently, yielding an impedance bandwidth increase by a factor of close to 10. In this letter, a conical metallic skirt is proposed as the parasite instead. The technique has been assessed with the aid of electromagnetic analysis software. A prototype for operation at the 1.5-4.5-GHz band was assembled and measured. The bandwidth increase is around 0.4 GHz greater than the one obtained with parasitic rings.

Keywords

broadband antennas; electrical engineering computing; monopole antennas; broadband modified monopole antenna; conical metallic skirt; electromagnetic analysis software; frequency 1.5 GHz to 4.5 GHz; impedance bandwidth; narrowband antenna; parasitic conical skirt; parasitic structures; staircase metallic rings; Antenna measurements; Bandwidth; Broadband antennas; Frequency measurement; Loss measurement; Microwave antennas; Broadband antennas; UHF antennas; dipole antennas; microwave antennas;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2012.2225592

Filename

6336781