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High-Q whispering gallery mode resonator filter with photonic bandgap spurious mode suppression

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3 Author(s)
Yu Ji ; Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA ; Yao, X.S. ; Maleki, L.

We demonstrate a novel bandpass filter constructed with a dielectric resonator operating in a whispering-gallery mode and a pair of photonic bandgap structured microstrip lines. The photonic bandgap structure is used to suppress the spurious modes around an intended transmission peak. The fabricated filter has a center frequency of 13.7 GHz, a Q of 2.000, an insertion loss of 7 dB and a spurious-mode suppression of 30 dB

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Frequency Control Symposium and Exhibition, 2000. Proceedings of the 2000 IEEE/EIA International

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