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http://dx.doi.org/10.9708/jksci.2010.15.10.099

A Study on Coupling Coefficient and Resonant Frequency Controllable Internal PIFA  

Lee, Sang-Hyun (한국폴리텍I대학 서울정수캠퍼스 유비쿼터스통신학과)
Lee, Moon-Woo (한국폴리텍I대학 서울정수캠퍼스 유비쿼터스통신학과)
Publication Information
Journal of the Korea Society of Computer and Information / v.15, no.10, 2010 , pp. 99-104 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 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.
Keywords
Resonant Frequency; Coupling Coefficient; Inductance;
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  • Reference
1 Costantine. J, Christodoulou. C. G, Barbin. S. E, "A new reconfigurable multi band patch antenna," Microwave and Optoelectronics Conference, pp. 75-78, Dec. 2007.
2 Nikolaou. S, Boyon Kim, Vryonides. P, "Reconfiguring antenna characteristics using PIN diodes," Antenna and Propagation, pp. 3748-3752, Jun. 2009.
3 J. L. Freeman, B. J. Lamberty, and G. S. Andrews,"Optoelectronically reconfigurable monopole antenna," Electronics Letters, vol. 28, Jul. 1992.
4 Fan Yang and Y. Rahmat-Samii, "Patch antennas with switchable slots (PASS) in wireless communications: concepts, designs, and applications," Antennas and Propagation Magazine, IEEE, vol. 47, pp. 13-29, Apr. 2005.
5 A. K. Skrivervik, J. F. Zurcher, O. Staub, and J. R. Mosig, "PCSantenna design:the challenge of miniaturization," IEEE Antenna and Propagation Magazine, vol. 43, pp. 12-17, Aug. 2001.
6 H. Tamaoka, H. Hamada, and T. Ueno, "A multiband antenna formobile phones," Furukawa Review, no. 26, 2005.
7 H. A. Wheeler, "Small Antenna," IEEE Trans. Antennas Propagation, vol. AP-23, pp. 462-469, Jul. 1975.
8 L. J. Chu, "Physical limitations of omni-directional antennas," J. Appl. Phys., vol. 19, pp. 1163-1175, Dec. 1948.   DOI
9 Olle Edvardsson, "SDA a new family of small antennas used since long time," Antennas and Propagation Society International Symposium, 2001., vol 3, pp. 464-467, July 2001.
10 O. Kivekas, J. Ollikainen, T. Lehtiniemi, Vainikainen, "Bandwidth, SAR, and Efficiency of Internal Mobile Phone Antennas," IEEE Transactions, Electromagnetic Compatibility, vol. 46, pp.71-86, Feb 2004.   DOI   ScienceOn
11 Olle Edvardsson, "On the influence of capacitive and inductive loading on different types of small patch/PIFA structures for use on mobile phones," Antennas and propagation, IEEE, vol 2, pp. 762-765, April 2001.