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A novel technique for tuning dielectric resonators

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2 Author(s)
Buer, K.V. ; Motorola Gov. & Syst. Technol. Group, Chandler, AZ, USA ; El-Sharawy, E.-B.

This paper presents a novel technique for the tuning of high dielectric resonators at microwave and millimeter wave frequencies. The resonator is tuned by coupling it to a section of non-resonant microstrip line. An experimental band-reject filter with a Q of 550 was tuned using this technique. The resulting tuning range of the filter was over 18 times its bandwidth. This technique makes it cost effective to tune dielectric resonators over a relatively broad range while maintaining a high Q characteristic

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:43 ,  Issue: 1 )