Title :
The effects of an additional shorting stub on PIFA performance
Author :
Charles, Yves Thierry Jean ; Ungvichian, Vichate
Author_Institution :
FAU EMI R&D Lab., Florida Atlantic Univ., Boca Raton, FL
Abstract :
A planar inverted-F antenna (PIFA) is known for its low-profile and compactness as compared to rectangular microstrip antennas. The shorting element in PIFA generates a quarter-wave resonance which reduces the physical dimensions of the antenna by at least 50%. In this paper, the effects of an additional shorting stub on an FR4-epoxy substrate PIFA are investigated. Computational and experimental VSWR results are reported for a PIFA with and without an additional short. It is observed that the additional shorting element increases the resonant frequency from 590 MHz to 950 MHz, or by 60%, while preserving the return loss. Additionally, simulation results reveal a 4 dB gain improvement for the modified PIFA at the resonant frequency.
Keywords :
UHF antennas; microstrip antennas; planar inverted-F antennas; epoxy substrate; frequency 590 MHz to 950 MHz; planar inverted-F antenna; quarter-wave resonance; rectangular microstrip antennas; resonant frequency; return loss; Electromagnetic compatibility;
Conference_Titel :
Electromagnetic Compatibility and 19th International Zurich Symposium on Electromagnetic Compatibility, 2008. APEMC 2008. Asia-Pacific Symposium on
Conference_Location :
Singapore
Print_ISBN :
978-981-08-0629-3
Electronic_ISBN :
978-981-08-0629-3
DOI :
10.1109/APEMC.2008.4559936
