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http://dx.doi.org/10.9708/jksci.2010.15.8.059

A Study on Coupling Coefficient and Resonant Frquency tunable Multi-band Internal Antenna  

Lee, Moon-Woo (한국폴리텍 I 대학 서울정수캠퍼스 유비쿼터스통신학과)
Lee, Sang-Hyun (한국폴리텍 I 대학 서울정수캠퍼스 유비쿼터스통신학과)
Publication Information
Journal of the Korea Society of Computer and Information / v.15, no.8, 2010 , pp. 59-66 More about this Journal
Abstract
In this paper, the internal antenna for mobile communication handset which is able to control both coupling coefficient and resonant frequency without any major modification of radiator and ground plane of antenna. Novel internal antenna with its controllable resonant frequency is presented for triple-band or over mobile handsets. The operating range can include GSM(880~960 MHz), GPS($1,575{\pm}10MHz$), DCS(1,710~1,880MHz), US-PCS(1,850~1,990 MHz), and W-CDMA(1,920~2,170 MHz). The proposed antenna is realized by combination of a half wavelength loaded line antenna and PIFA(Planner Inverted F Antenna). A single shorting and feeding points are used and they are common to both antenna structures. One of two inductors which is placed at each shorting post, one inductor is for adjusts amount of coupling, and the other controlling the resonant frequency in DCS/US-PCS/WCDMA bands. The inductance range for control of input impedance is between 0nH and 6.8nH, and each of gain variation in GSM, GPS and DCS/US-PCS/WCDMA band is under 0.15dBi, 0.73dBi and 0.29dBi. The inductance range for control of the resonant frequency is between 1640MHz and 2500MHz, and each of gain variation in GSM, GPS and DCS/US-PCS/WCDMA band is under 0.46dBi, 0.53dBi and 0.8dBi.
Keywords
Half Wavelength Loaded Line Antenna; Resonant Frequency; Coupling Coefficient; Inductance;
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