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A Study on Coupling Coefficient and Resonant Frequency Controllable Internal PIFA

  • Journal of The Korea Society of Computer and Information
  • Abbr : JKSCI
  • 2010, 15(10), pp.99-104
  • Publisher : The Korean Society Of Computer And Information
  • Research Area : Engineering > Computer Science

이상현 1 이문우 1

1한국폴리텍1대학

Accredited

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 PIFA(Planner Inverted F Antenna). The resonant frequency as well as amount of coupling between feeding point and shorting post can be adjusted by changing inductance. Because the inductor is connected on shorting post where the strength of electric field is weak, the performance reduction of the proposed antenna is very small enough to neglect. For the variation of the inductance value within 3.3nH, the resonant frequency of antenna can have operating range of 1650MHz ~ 1830MHz. And as be increased the inductance, the coupling coefficient of antenna is over coupled. This means that it can be electrically controlled the resonant frequency and input impedance of antenna by inductance and minimized the mismatch loss. Size reduction of 10% for PIFA is obtained without any major modifications of antenna elements. For the frequency range from 1650 to 1830MHz, reduction of the measured antenna gain is within 0.93dB as varying the value of inductance from 0 to 3.3nH.

Citation status

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