Design of an PIFA-IFA-monopole in dual-SIM mobile phone for GSM/DCS/Bluetooth operations

Abstract

This paper presents a dual subscriber identity model (SIM) mobile phone design which integrates a planar inverted-F antenna (PIFA), a inverted-F antenna (IFA) and a monopole. Several solutions are simulated, fabricated and measured to improve the isolation of antennas. By adjusting antennas layout and the gap and angle of antennas, the isolation S12 decrease below -11 dB. For PIFA and monopole, total radiated power (TRP) of GSM900 band and DCS1800 band is larger than 27 dB and 25 dB respectively, and total isotropic sensitivity (TIS) of GSM900 band and DCS1800 band is lesser than -102 dBm as the BER=2.44%. The gain of IFA is about -2.7 dB~3.79 dB. The present ways are very useful in the design of dual SIM mobile phone.