Modified planar inverted-L antenna

Author

Evans, J.A. ; Ammann, M.J.

Author_Institution

Sch. of Electron. & Commun. Eng., Dublin Technol. Inst., Ireland

fYear

2003

fDate

8-9 Sept. 2003

Firstpage

103

Lastpage

106

Abstract

A hybrid inverted-L antenna (HIL) has been shown to reduce the physical height of a square planar monopole antenna, while retaining a relatively wide impedance bandwidth and good radiation pattern characteristics. The introduction of horizontal slots in the vertical edges of the antenna cause the surface current to meander, resulting in a decrease in the lower edge frequency of the impedance bandwidth. The impact of different sizes and arrangements of slots on impedance and radiation pattern bandwidth, gain and surface current distribution is simulated using transmission line modelling (TLM). Simulated results for impedance bandwidth are verified with measurements. With other modifications these antennas are proposed for wireless and mobile applications in the 2.45 GHz and 5.8 GHz ISM bands.

Keywords

antenna radiation patterns; current distribution; electric impedance; mobile communication; monopole antennas; 2.45 GHz; 5.8 GHz; ISM bands; antenna gain; horizontal slots; hybrid inverted-L antenna; impedance bandwidth; lower edge frequency; mobile applications; physical height reduction; radiation pattern characteristics; square planar monopole antenna; surface current; transmission line modelling; wireless applications; Antenna measurements; Antenna radiation patterns; Bandwidth; Current distribution; Frequency; Impedance measurement; Mobile antennas; Slot antennas; Surface impedance; Transmission line measurements;

fLanguage

English

Publisher

ieee

Conference_Titel

High Frequency Postgraduate Student Colloquium, 2003

Print_ISBN

0-7803-8123-8

Type

conf

DOI

10.1109/HFPSC.2003.1242317

Filename

1242317