GNSS LNA-filter module using BAW CRF filters

Gilbert, Stephen R.; Ruby, R.; Chow, Yut-Hoong; Hii, William; Lim, Suo Hon

doi:10.1109/ultsym.2010.5935984

Cited by 7 publications

(1 citation statement)

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“…a conventional crF is realized by sandwiching the multilayer mechanism between two stacked resonators to weaken the acoustic coupling between the resonators [5], [6]; however, the coupling is very delicate and hard to control in fabrication. later, a single, unique coupling layer was developed to simplify the fabrication process [7]- [9].…”

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confidence: 99%

Design and simulation of coupled-resonator filters using periodically slotted electrodes on FBARs [Correspondence]

Liu

Omori

Ahn

et al. 2014

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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This paper discusses the use of periodically slotted top electrodes in the film bulk acoustic resonator (FBAR) structure for the realization of wideband coupled-resonator filters (CRFs), where evanescent modes in the periodic structure are used for the coupling between adjacent electrodes. First, wave propagation in this structure is investigated. Finite element analysis is performed for the Mo/ZnO/Mo structure. The result suggests that lateral wave propagation is controlled by the Bragg reflection, and that transverse modes can be suppressed when the structure is properly designed. Next, a CRF is designed. It is shown that wideband CRFs are realizable when the period, thickness, and width of slotted electrodes are properly set.

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confidence: 99%