Laterally Coupled BST/Sapphire High Overtone Bulk Acoustic Resonators Exhibiting DC Tunable Comb Filter Response with High Q.f Product

Kongbrailatpam, SS and Kongbrailatpam, LN and Pillai, G and Akhil Raman, TS and Raju, KCJ (2023) Laterally Coupled BST/Sapphire High Overtone Bulk Acoustic Resonators Exhibiting DC Tunable Comb Filter Response with High Q.f Product. In: UNSPECIFIED.

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Abstract

In this paper, the use of laterally coupled barium strontium titanate (BST) based high overtone bulk acoustic resonators (HBAR) for RF comb filter applications is investigated. Ba0.5Sr0.5TiO3 (BST) being in its paraelectric phase, the DC dependence nature is exploited for studying capability of tuning the 2-port device and exploring the enhancements such categories of devices has to offer. The individual resonators having the capability of exhibiting high Q multimode across a wide frequency spectrum, the 2-port device does provide multiple filter passband which are periodically spaced in the measured frequency range of 300 MHz to 10 GHz. The effect, DC biasing has on the filter response is studied and is found that the biasing conditions significantly enhances the Q and the bandwidth (BW) of the filter. Q.f product in the range of 4�1013 Hz (with BW around 65 kHz) with DC tunabilty is reported for one of the filter modes. © 2023 IEEE.

Item Type:	Conference Paper
Publication:	Proceedings - 2023 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium, EFTF/IFCS 2023
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Acoustic resonators; Barium strontium titanate; Comb filters; Optical resonators; Q factor measurement; Strontium titanates, Barium-strontium titanate; Comb-filter; Filter response; High overtone; High Q factor; High-overtone bulk acoustic resonators; High-Q factor; Narrow bandwidth; Tunabilities; Tunables, Bandwidth
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	04 Mar 2024 09:41
Last Modified:	04 Mar 2024 09:41
URI:	https://eprints.iisc.ac.in/id/eprint/84380

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