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http://dx.doi.org/10.6109/jicce.2010.8.5.484

A Compact Tunable Bandpass Filter Using Coupled Metamaterial Resonators with Varactor Diode  

Kim, Gi-Rae (Department of Electronics Engineering, Silla University)
Abstract
In this paper, we present a novel tunable microstrip bandpass filter based on split ring resonators (SRRs). The varactors are reverse-biased semiconductor diode, and are connected between the concentric rings of the SRR. An individual varactor loaded SRR based bandpass tunable filter module is analyzed. Then a second order tunable filter with 7% fractional bandwidth and a tuning range from 2.75 to 2.86 GHz is assembled from basic filter modules. The simulator HFSS (V10) is used to design the tunable filter and to simulate. The results show good characteristics is created.
Keywords
Tunable filter; Bandpass filter; Split ring resonator (SRR); Varactor diode;
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1 C. T. -C. Nguyen, L. P. B. Katehi, and G. M. Rebeiz, "Micromachined devices for wireless communications", Proc. of the IEEE, vol. 86, pp. 1756-1768, 1998.   DOI   ScienceOn
2 B. W. Kim and S. W. Yun, "Varactor-tuned combline bandpass filter using step-impedance microstrip lines", IEEE Trans. Microwave Theory Tech. 52, pp. 1279-1283, 2004.   DOI   ScienceOn
3 D. R. Smith, W. J. Padilla, D. C. Vier, S. C. Nemat-Nasser, and S. Schultz, "Composite medium with simultaneously negative permeability and permittivity", Phys. Rev. Lett., vol. 84, pp. 4184- 4187, 2000.   DOI   ScienceOn
4 K. Aydin and E. Ozbay, "Capacitor-loaded split ring resonators as tunable metamaterial components", J. Appl. Phys., 2007.
5 I. Gil, J. Bonache, J. Garcia-Garcia, and F. Martin, "Tunable metamaterial transmission lines based on varactor-loaded split-ring resonators", IEEE Trans. Microwave Theory Tech., vol. 54, 2665- 2674, 2006.   DOI   ScienceOn
6 J. S. Hong and M. J. Lancaster, Microstrip filters for RF/microwave applications, New York: Wiley, 2001.
7 K. Entesari and G.M. Rebeiz, "A differential 4-bit 6.5-10-GHz RF MEMS tunable filter", IEEE Trans Microwave Theory Tech., vol. 53, pp. 1103-1110, 2005.   DOI   ScienceOn
8 Y. Ishikawa, T. Nishikawa, T. Okada, S. Shinmura, Y. Kamado, F. Kanaya, and K. Wakino, "Mechanically tunable MSW bandpass filter with combined magnetic units", IEEE MTT-S Int. Microwave Symp. Digest, pp. 143-146, 1990.
9 A. R. Brown and G. M. Rebeiz, "A varactor-tuned RF filter", IEEE Trans Microwave Theory Tech., vol. 48, pp. 1157-1160, 2000.   DOI   ScienceOn
10 M. Makimoto and M. Sagawa, "Varactor tuned bandpass filters using microstrip-line ring resonators", IEEE Int. Symp. Microwave Theory Tech. Digest, pp. 411- 414, 1986.