Spirograph Planar Monopole Antenna (SPMA) Providing Unidirectional Invariant Radiation Patterns by Employing a Broadband Ground Plane

Author

Rayno, Jennifer Taylor ; Sharma, Sanjay Kumar

Author_Institution

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

Volume

11

fYear

2012

fDate

7/4/1905 12:00:00 AM

Firstpage

1588

Lastpage

1591

Abstract

The spirograph planar monopole antenna (SPMA) is combined with the proposed broadband ground plane to achieve unidirectional radiation patterns with enhanced gain and minimal broadside gain variation. The broadband ground plane is a simple structure that consists of a resistive card and a copper sheet in a fixed position. The measured impedance bandwidth for the unidirectional SPMA, with VSWR <; 2 matching criterion, is 1.14-2.90 GHz (87.1% bandwidth). The antenna has a unidirectional radiation pattern that is mostly invariant over the entire frequency range, a single main lobe, and low cross polarization. The measured broadside gain varies from 2.59 to 6.85 dBi within the impedance bandwidth.

Keywords

antenna radiation patterns; broadband antennas; electromagnetic wave polarisation; impedance matching; monopole antennas; SPMA; bandwidth 1.14 GHz to 2.90 GHz; broadband ground plane; cross polarization; impedance bandwidth; spirograph planar monopole antenna; unidirectional invariant radiation pattern; Antenna measurements; Antenna radiation patterns; Bandwidth; Broadband antennas; Gain; Gain measurement; Wideband; Invariant radiation pattern; low cross polarization; spirograph planar monopole antenna (SPMA); unidirectional radiation; wideband;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2012.2236879

Filename

6399517