PIFA天线论文

Whip-PIFA Combination in Wireless Handset ApplicationWhip-PIFA Combination in Wireless Handset Application: A Hybrid Circuit Model and Full Wave Analysis
Zhao Li, Yshya Rahmat-Sam” D e p m e n t of Electrical Engineering, University of Califomia, Los Angeles Los Angeles, Califomia 90095 rahmat(iilee.uela.cdu ZhsnOee.uela.edu Abstract In this paper, a circuit model was developed in RF ADS to simulate the coupling effect of a retracted whip on a PIFA (Planar Inverted “F” antenna) antenna in a wireless handset application. A PIFA was designed as the main antenna of a handset to cover the 8OOMHz band (824MHz 894 MHz) and 1900 MHz band (1850 MHz 1990 MHz). A parasitic dual band whip antenna was used to improve the performance of the PIFA especially when the handset is used against the head. In such a whip-PIFA combination environment, the retract