Spherical Bragg Reflector Resonators

Michael Tobar; J-M. Le Floch; D. Cros; J. Krupka; James Anstie; John Hartnett

doi:10.1109/TUFFC.2004.1334838

Spherical Bragg Reflector Resonators

Michael Tobar, J-M. Le Floch, D. Cros, J. Krupka, James Anstie, John Hartnett

Graduate Research School

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

In this paper we introduce the concept of thespherical Bragg reflector (SBR) resonator. The resonatoris made from multiple layers of spherical dielectric, loadedwithin a spherical cavity. The resonator is designed to concentratethe energy within the central region of the resonatorand away from the cavity walls to minimize conductorlosses. A set of simultaneous equations is derived,which allows the accurate calculation of the dimensions ofthe layers as well as the frequency. The solution is confirmedusing finite-element analysis. A Teflon-free space resonatorwas constructed to prove the concept. The Teflon SBR wasdesigned at 13.86 GHz and exhibited a Q-factor of 22,000,which agreed well with the design values. This representsa factor of 3.5 enhancement over a resonator limited bythe loss-tangent of Teflon. Similarly, SBR resonators constructedwith low-loss materials could achieve Q-factors ofthe order of 300,000.

Original language	English
Pages (from-to)	1054-1059
Journal	IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume	51
Issue number	9
DOIs	https://doi.org/10.1109/TUFFC.2004.1334838
Publication status	Published - 2004

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title = "Spherical Bragg Reflector Resonators",

abstract = "In this paper we introduce the concept of thespherical Bragg reflector (SBR) resonator. The resonatoris made from multiple layers of spherical dielectric, loadedwithin a spherical cavity. The resonator is designed to concentratethe energy within the central region of the resonatorand away from the cavity walls to minimize conductorlosses. A set of simultaneous equations is derived,which allows the accurate calculation of the dimensions ofthe layers as well as the frequency. The solution is confirmedusing finite-element analysis. A Teflon-free space resonatorwas constructed to prove the concept. The Teflon SBR wasdesigned at 13.86 GHz and exhibited a Q-factor of 22,000,which agreed well with the design values. This representsa factor of 3.5 enhancement over a resonator limited bythe loss-tangent of Teflon. Similarly, SBR resonators constructedwith low-loss materials could achieve Q-factors ofthe order of 300,000.",

author = "Michael Tobar and {Le Floch}, J-M. and D. Cros and J. Krupka and James Anstie and John Hartnett",

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doi = "10.1109/TUFFC.2004.1334838",

language = "English",

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TY - JOUR

T1 - Spherical Bragg Reflector Resonators

AU - Tobar, Michael

AU - Le Floch, J-M.

AU - Cros, D.

AU - Krupka, J.

AU - Anstie, James

AU - Hartnett, John

PY - 2004

Y1 - 2004

N2 - In this paper we introduce the concept of thespherical Bragg reflector (SBR) resonator. The resonatoris made from multiple layers of spherical dielectric, loadedwithin a spherical cavity. The resonator is designed to concentratethe energy within the central region of the resonatorand away from the cavity walls to minimize conductorlosses. A set of simultaneous equations is derived,which allows the accurate calculation of the dimensions ofthe layers as well as the frequency. The solution is confirmedusing finite-element analysis. A Teflon-free space resonatorwas constructed to prove the concept. The Teflon SBR wasdesigned at 13.86 GHz and exhibited a Q-factor of 22,000,which agreed well with the design values. This representsa factor of 3.5 enhancement over a resonator limited bythe loss-tangent of Teflon. Similarly, SBR resonators constructedwith low-loss materials could achieve Q-factors ofthe order of 300,000.

AB - In this paper we introduce the concept of thespherical Bragg reflector (SBR) resonator. The resonatoris made from multiple layers of spherical dielectric, loadedwithin a spherical cavity. The resonator is designed to concentratethe energy within the central region of the resonatorand away from the cavity walls to minimize conductorlosses. A set of simultaneous equations is derived,which allows the accurate calculation of the dimensions ofthe layers as well as the frequency. The solution is confirmedusing finite-element analysis. A Teflon-free space resonatorwas constructed to prove the concept. The Teflon SBR wasdesigned at 13.86 GHz and exhibited a Q-factor of 22,000,which agreed well with the design values. This representsa factor of 3.5 enhancement over a resonator limited bythe loss-tangent of Teflon. Similarly, SBR resonators constructedwith low-loss materials could achieve Q-factors ofthe order of 300,000.

U2 - 10.1109/TUFFC.2004.1334838

DO - 10.1109/TUFFC.2004.1334838

M3 - Article

VL - 51

SP - 1054

EP - 1059

JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

SN - 0885-3010

IS - 9

ER -

Spherical Bragg Reflector Resonators

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