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Shorting strap tunable stacked patch PIFA

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1 Author(s)
N. C. Karmakar ; Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore

An oppositely shorted dual-band stacked patch planar inverted-F antenna (PIFA) is developed. RF switches are integrated to the shorting straps of the stacked patches to make a tunable PIFA. The L band switch yields 0.45-dB insertion loss and 10-dB isolation bandwidth (BW) of 108% at 1.8 GHz. The tunable PIFA yields 10% frequency tunability BW at 745 MHz when the number of upper radiating patch's shorting straps changes and 20% BW at 1137 MHz when the number of lower radiating patch's shorting straps changes. Independent lower and upper frequency tunings are achieved through this technique.

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:52 ,  Issue: 11 )