Title :
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
fDate :
6/25/1905 12:00:00 AM
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;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2003.819676
