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This paper presents a novel compact dual-band printed quadrifilar helix antenna (PQHA) for application in Compass Navigation Satellite System (CNSS) of China. This antenna is consisted of two quadrifilar helix elements that are arranged at inner and outer cylinder. It works at the B1 (1.561GHz) and S (2.492GHz) bands. Each four spiral arms is excited by a series feed network in equal magnitude and...
The planar inverted-F antenna (PIFA) is widely used in mobile and portable radio systems due to its excellent features. However, it is not yet employed as an ultra wide band antenna because it was considered a narrowband antenna. This paper introduces an ultra wideband planar inverted-F antenna based on three techniques, which are (a) changes in the widths of feed and shorting plates, (b) addition...
Planar Inverted F Antennas (PIFAs) are commonly used in portable applications due to their attractive features. There exists a huge demand to use these PIFAs as MIMO or diversity antennas to allow for an increase in data rates or signal quality and to combat the shallow fading minima that exist in a multipath propagation environment with a non line of sight path. Recently, two new single element dual...
The ultra wide band (UWB) systems require antennas having a very broad impedance bandwidth. The planar inverted-F antenna (PIFA) is widely used in mobile and portable devices due to its excellent performance. But it is not used as an ultra wide band antenna as it is assumed to be a narrow band antenna. This paper is aimed at addressing this problem by introducing a PIFA antenna having a parasitic...
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