volume | PIER Journals

Abstract

A compact open-loop resonator bandpass filter with suppression of the second and the third harmonics is demonstrated in this paper. This novel filter is based on a Tri-Section SIR to achieve size minimization and suppressed spurious response. The simulations and measurements of a 0.9 GHz prototype bandpass filter are presented. The measured results agree well with simulation and calculation.

1. Hong, J. S. and M. J. Lancaster, "Canonical microstrip filter using square open-loop resonators," IEE Electron. Lett., Vol. 31, No. 23, 2020-2022, 1995.
doi:10.1049/el:19951370

2. Hong, J. S. and M. J. Lancaster, "Theory and experiment of novel microstrip slow-wave open-loop resonator filters," IEEE Trans. Microwave Theory Tech., Vol. 45, No. 12, 2358-2365, 1997.
doi:10.1109/22.643844

3. Makimoto, M. and S. Yamashita, "Bandpass filters using parallel coupled stripline stepped impedance resonators," IEEE Trans. Microw. Theory Tech., Vol. MTT-28, No. 12, 1413-1417, 1980.
doi:10.1109/TMTT.1980.1130258

4. Makimoto, M. and S. Yamashita, Microwave Resonators and Filters for Wireless Communication, Springer-Verlag, 2001.

5. Fu, Y. Q. and N. C. Yuan, "Reflection phase and frequency bandgap characteristics of EBG structures with anisotropic periodicity," Journal of Electromagnetic Waves and Applications, Vol. 19, No. 14, 1897-1905, 2005.
doi:10.1163/156939305775570576

6. Alfano, L., A. D'Orazio, M. De Sario, V. Petruzzelli, and F. Prudenzano, "A continuous varying impedance passband microstrip filter exploiting a butterfly wing shape," Journal of Electromagnetic Waves and Applications, Vol. 19, No. 9, 1145-1156, 2005.
doi:10.1163/156939305775525972

7. Burokur, S. N., M. Latrach, and S. Toutain, "Analysis and design of waveguides loaded with split-ring resonators," Journal of Electromagnetic Waves and Applications, Vol. 19, No. 11, 1407-1421, 2005.
doi:10.1163/156939305775525864

8. Xu, W., L. W. Li, H. Y. Yao, T. S. Yeo, and Q. Wu, "Extraction of constitutive relation tensor parameters of SRR structures using transmission line theory," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 1, 13-25, 2006.
doi:10.1163/156939306775777413

9. Gu, J.-Z. and X.-W. Sun, "Miniaturization and harmonic suppression open-loop resonator bandpass filter with capacitive terminations," MTT-S.

10. Packiaraj, D. and M. Ramesh, "Design of a tri-section folded SIR filter," IEEE Microwave and Wireless Component Letters, Vol. 16, No. 5, 2006.

Dr. Jian Zhang

Dr. Jian-Zhong Gu

Dr. Bin Cui

Dr. Xiao-Wei Sun