Planar inverted-F antennas as an inverse class-F termination for wireless applications

Author

Liw, Saxon ; Ellis, Grant A.

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore

Volume

2

Issue

1

fYear

2003

fDate

6/25/1905 12:00:00 AM

Firstpage

250

Lastpage

253

Abstract

We present an electrically small antenna for use with high-efficiency power amplifiers for wireless applications. A planar inverted-F antenna (PIFA) design is shown that is optimized to provide an inverse class-F load termination for use at the output of a field effect transistor (FET) for optimum output power and efficiency. A power-added efficiency in excess of 60% was also measured for an active PIFA.

Keywords

UHF antennas; UHF power amplifiers; active antennas; antenna feeds; antenna radiation patterns; electric impedance; field effect transistor circuits; load (electric); mobile antennas; mobile radio; 1.85 GHz; 2.3 GHz; FET; PIFA; active antenna; electrically small antenna; field effect transistor; high-efficiency power amplifiers; input impedance; inverse class-F load termination; inverse class-F termination; mobile communication devices; planar inverted-F antennas; radiation patterns; FETs; Feeds; Frequency; High power amplifiers; Loaded antennas; Pins; Power amplifiers; Power generation; Power system harmonics; Radiofrequency amplifiers;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2003.819676

Filename

1247438