This article deals with a design of compact six-band internal antenna using two identically stacked periodic-grooved patches and shorting plates and covering the frequency bands com- posed of cellular (824 - 894 MHz), GSM (880 -960 MHz), DCS (1710 -1880 MHz), PCS (1850 -1990 MHz), UMTS (1920 -2170 MHz), and ISM (2400 -2480 MHz) under the criteria 7.3 dB for the first five bands and 6 dB for the last band, respectively. To accom- plish this goal, the planar inverted-F antenna (PIFA) with periodic grooves is suggested, analyzed, and verified by using two commer- cially available softwares, CST MWS and HFSS based on the FDTD and FEM algorithms, respectively, and carrying out the measure- ments in terms of return loss, radiation patterns, and gains. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2718 -2722, 2008; Published online in Wiley InterScience (www.interscience.wiley. com). DOI 10.1002/mop.23776
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