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High-Q whispering gallery mode dielectric resonator bandpass filter with microstrip line coupling and photonic bandgap 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 describe a novel bandpass filter based on using whispering gallery (WG) modes in high-density dielectric resonators (DR). Microstrip line mode-coupling and photonic bandgap (PEG) suppression techniques are also features of this design. Based on this approach, we demonstrate a filter with center frequency of 13.7 GHz, Q of 2000, insertion loss of 7 dB, and attenuation of 30 dB

Published in:

Microwave and Guided Wave Letters, IEEE  (Volume:10 ,  Issue: 8 )