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PIER PIER B PIER C PIER M PIER Letters
2004-10-12
Loaded Microstrip Disk Resonator Exhibits Ultra-Low Frequency Resonance
By
Tapas Chakravarty,

    Dr. Tapas Chakravarty

    TCS Research

    India

    Homepage

Sushim Roy,

    Dr. Sushim Roy

    Department of Electronics & Telecommunication Engineering

    Bengal Engineering college

    India

    Homepage

Salil Sanyal,

    Dr. Salil Sanyal

    Department of Electronics & Telecom Engineering

    Jadavpur University

    India

    Homepage

Asok De

    Professor Asok De

    Department of Electronics & Communication Engineering

    Ambedkar Institute for Advanced Communication Technology & Research

    India

    Homepage

, Vol. 50, 1-12, 2005
doi:10.2528/PIER04042601
Abstract
In this paper a novel method of generation of ultra-low resonance in a microstrip disk resonator is presented. The disk resonator is loaded with series L-C circuit across a selective location in the disk via a thin shorting pin. It is shown that in loaded disk resonator, the lowest resonance observed is in VHF range whereas the unloaded disk had a fundamental resonance at 1.76 GHz. This resonance is slightly offset from the series resonant frequency of L-C circuit. and it depends on the disk radius as well. Using IE3D, a commercial MoM solver, the said structure is simulated. The experimental results agree well with the simulated results. A closed form expression for computing the resonant frequency is given.
Citation
Tapas Chakravarty, Sushim Roy, Salil Sanyal, and Asok De, "Loaded Microstrip Disk Resonator Exhibits Ultra-Low Frequency Resonance," , Vol. 50, 1-12, 2005.
doi:10.2528/PIER04042601
References

1. Garg, R., P. Bhartia, I. Bahl, and A. Ittipiboon, Microstrip Antenna Design Handbook, Artech House, 2000.

2. Majumdar, A., T. Chakravarty, S. Saran, and S. K. Sanyal, "A novel technique to implement frequency hopping planar antennas with a computer interface," Microw. and Optical Tech. Letters, Vol. 38, 270-274, 2003.
doi:10.1002/mop.11035

3. Chakravarty, T., S. K. Sanyal, and A. De, "Compact and tunable circular microstrip patch using post-varactor loading," IETE Tech. Review, Vol. 18, 153-157, 2001.

4. Chakravarty, T. and A. De, "Resonant frequency of a shorted circular patch with the use of a modified impedance expression for a metallic post," Microw. and Optical Tech. Letters, Vol. 33, No. 4, 252-256, 2002.
doi:10.1002/mop.10290

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