Ultrawide Bandwidth (UWB) Planar Monopole Antenna Backed by Novel Pyramidal-Shaped Cavity Providing Directional Radiation Patterns

Author

Moody, Robert A. ; Sharma, Satish K.

Author_Institution

Dept. of Electr. & Comput. Eng., San Diego State Univ., San Diego, CA, USA

Volume

10

fYear

2011

fDate

7/3/1905 12:00:00 AM

Firstpage

1469

Lastpage

1472

Abstract

An ultrawideband (UWB) coplanar waveguide (CPW)-fed pentagon-shaped planar monopole antenna (PMA) backed by a novel pyramidal-shaped cavity is presented that provides directional radiation patterns. The pyramidal-shaped cavity reflector is placed at a fixed spacing from the UWB monopole antenna to provide impedance and radiation performance over 110% (3.1-10.6 GHz) frequency band. The PMA itself on a foam substrate provides stable gain variation within 3 dB over an impedance bandwidth (w.r.t. S₁₁ <; -10 dB) of 120% (3-12 GHz). The proposed cavity-backed PMA prototype antenna was fabricated, and experimental verification was performed for impedance matching and radiation patterns. The measured results show reasonable agreement with the simulated ones.

Keywords

antenna feeds; coplanar waveguides; directive antennas; impedance matching; monopole antennas; planar antennas; ultra wideband antennas; CPW-fed pentagon-shaped antenna; UWB planar monopole antenna; antenna radiation performance; cavity-backed PMA prototype; coplanar waveguide; directional radiation patterns; foam substrate; frequency 3 GHz to 12 GHz; gain variation; impedance matching; pyramidal-shaped cavity reflector; ultra wide bandwidth antenna; Antenna measurements; Antenna radiation patterns; Bandwidth; Cavity resonators; Gain; Ultra wideband antennas; Coplanar waveguide (CPW); directional patterns; planar monopole antenna (PMA); pyramidal-shaped cavity; ultrawideband (UWB);

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2011.2179513

Filename

6101548