A compact multiband PIFA for handheld RFID applications.

ABSTRACT In this article, a compact multiband planar inverted-F antenna (PIFA) is proposed to cover three frequency bands for RFID operation: 920-925 MHz, 2.4-2.48 GHz, 5.815-5.875 GHz. The multiband PIFA has the advantage of compact size of 55 × 40 × 0.8 mm³. The antenna proposed herein was composed of a modified planar inverted-F with a loaded arm and a parasitic inverted-L. The lowest band is achieved by the modified planar inverted-F and the highest band is achieved by the parasitic inverted-L. With the loaded arm, the band from 2.4 GHz to 2.48 GHz is achieved. The current distribution and radiation patterns are studied in this article. The antenna was fabricated on the FR4 substrate, providing the return loss less than −10 dB over all bands of interest. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1934-1937, 2016 [ABSTRACT FROM AUTHOR]