JOURNAL OF COMPUTERS (JCP)
ISSN : 1796-203X
Volume : 4    Issue : 7    Date : July 2009

Effects of Substrate Permittivity on Planar Inverted-F Antenna Performances
Yves-Thierry Jean-Charles, Vichate Ungvichian, and Juciana A. Barbosa
Page(s): 610-614
Full Text:
PDF (680 KB)


Abstract
This paper quantifies the gain and matching bandwidth variations of a planar inverted-F antenna
(PIFA) for several dielectric substrates. The performance of the PIFA is assessed in two
configurations. First, the PIFA is studied with different substrates for a radiating patch of fixed
dimensions of 4.92 cm x 2.13 cm. The effects of the dielectric constant of the perfect and lossy
substrates on the resonant frequency, bandwidth and gain are investigated. A gain drop of 2 dB per
decade is observed. In the second evaluation, the physical dimensions of the radiating element of
the PIFA are adjusted to achieve resonance at 1.14 GHz. The gain drop reduces to 1.5 dB per
decade.

Index Terms
PIFA, gain, substrate materials