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

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2 Author(s)
Liw, S. ; Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore ; Ellis, G.A.

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.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:2 ,  Issue: 1 )