Abstract
A technique for tuning a single-element planar inverted F-antenna (PIFA) to provide a dual-band operation is introduced. The tuning is possible due to the particular impedance level typical to radio-frequency identification microchips. As the desired impedance level resides near the outer rim of the Smith chart, a single impedance locus may be arranged to pass the input impedance twice resulting in dual-band operation. The tuning of the impedance locus is based on the feed inductance and capacitive coupling at the open end of the patch. In this paper, also a discussion about the principles of platform tolerance of small antennas is provided. A design, circuit model, simulations, and measurement results of dual-band platform tolerant PIFAs are reported and discussed.
Original language | English |
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Pages (from-to) | 2632-2637 |
Number of pages | 6 |
Journal | IEEE Transactions on Antennas and Propagation |
Volume | 54 |
Issue number | 9 |
DOIs | |
Publication status | Published - 2006 |
MoE publication type | A1 Journal article-refereed |
Keywords
- dual-band
- energy scavenging
- planar inverted F-antenna (PIFA)
- platform tolerance
- radio-frequency identification (RFID)