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Progress In Electromagnetics Research Letters
ISSN: 1937-6480
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DESIGN OF OPEN-LOOP DUAL-MODE MICROSTRIP FILTERS

By L. Athukorala, D. Budimir, and M. M. Potrebic

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Abstract:
This paper presents the design of compact second-order bandpass filters based on dual-mode open-loop resonator. A filter design procedure is provided to facilitate the design process. The paper also describes the nature of the inherent transmission zero associated with the structure and presents a method of generating two additional zeros for improving stop-band performance. Finally, a filter design example is presented to validate the argument.

Citation:
L. Athukorala, D. Budimir, and M. M. Potrebic, "Design of Open-Loop Dual-Mode Microstrip Filters," Progress In Electromagnetics Research Letters, Vol. 19, 179-185, 2010.
doi:10.2528/PIERL10102007

References:
1. Hong, J.-S. and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, Wiley-Interscience, New York, 2001.

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

3. Hong, J.-S. and M. J. Lancaster, "Design of highly selective microstrip bandpass filters with a single pair of attenuation poles at finite frequencies," IEEE Trans. Microw. Theory Tech., Vol. 48, No. 7, 1098-1107, 2000.

4. Hong, J.-S., H. Shaman, and Y.-H. Chun, "Dual-mode microstrip open-loop resonators and filters," IEEE Trans. Microw. Theory Tech., Vol. 55, No. 8, 1764-1770, 2007.

5. Makimoto, M. and S. Yamashita, Microwave Resonators and Filters for Wireless Communication: Theory, Design and Application, Springer-Verlag, New York, 2001.


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