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
SN - 0885-3010
VL - 51
SP - 1054
EP - 1059
JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
IS - 9
ER -