Microwave characterisation of BaCe2Ti5O15 and Ba5Nb4O15 ceramic dielectric resonators using whispering gallery mode method

R. Ratheesh; M.T. Sebastian; P. Mohanan; Michael Tobar; John Hartnett; R.A. Woode; David Blair

doi:10.1016/S0167-577X(00)00118-X

Microwave characterisation of BaCe2Ti5O15 and Ba5Nb4O15 ceramic dielectric resonators using whispering gallery mode method

R. Ratheesh, M.T. Sebastian, P. Mohanan, Michael Tobar, John Hartnett, R.A. Woode, David Blair

Graduate Research School

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

69 Citations (Web of Science)

Abstract

A microwave dielectric ceramic resonators based on BaCe(2)Ti(5)0(15) and Ba5Nb4O15 have been prepared by conventional solid state ceramic route. The dielectric resonators (DRs) have high dielectric constant 32 and 40 for BaCe2Ti5O15 and Ba5Nb4O15, respectively. The whispering gallery mode (WGM) technique was employed for the accurate determination of the dielectric properties in the microwave frequency range. The BaCe2Ti5O15 and Ba5Nb4O15 have quality factors (Q X F) of 30,600 and 53,000 respectively. The quality factor is found to depend on the azimuthal mode numbers. The temperature coefficient of resonant frequency (tau(f)) of BaCe2Ti5O15 and Ba5Nb4O15 have been measured accurately using different resonant modes and are +41 and +78 ppm/K, respectively. (C) 2000 Elsevier Science B.V. All rights reserved.

Original language	English
Pages (from-to)	279-285
Journal	Materials Letters
Volume	45
DOIs	https://doi.org/10.1016/S0167-577X(00)00118-X
Publication status	Published - 2000

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@article{3a03dddb334e41a9b4746eee6c9e32c0,

title = "Microwave characterisation of BaCe2Ti5O15 and Ba5Nb4O15 ceramic dielectric resonators using whispering gallery mode method",

abstract = "A microwave dielectric ceramic resonators based on BaCe(2)Ti(5)0(15) and Ba5Nb4O15 have been prepared by conventional solid state ceramic route. The dielectric resonators (DRs) have high dielectric constant 32 and 40 for BaCe2Ti5O15 and Ba5Nb4O15, respectively. The whispering gallery mode (WGM) technique was employed for the accurate determination of the dielectric properties in the microwave frequency range. The BaCe2Ti5O15 and Ba5Nb4O15 have quality factors (Q X F) of 30,600 and 53,000 respectively. The quality factor is found to depend on the azimuthal mode numbers. The temperature coefficient of resonant frequency (tau(f)) of BaCe2Ti5O15 and Ba5Nb4O15 have been measured accurately using different resonant modes and are +41 and +78 ppm/K, respectively. (C) 2000 Elsevier Science B.V. All rights reserved.",

author = "R. Ratheesh and M.T. Sebastian and P. Mohanan and Michael Tobar and John Hartnett and R.A. Woode and David Blair",

year = "2000",

doi = "10.1016/S0167-577X(00)00118-X",

language = "English",

volume = "45",

pages = "279--285",

journal = "Materials Letters",

issn = "0167-577X",

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TY - JOUR

T1 - Microwave characterisation of BaCe2Ti5O15 and Ba5Nb4O15 ceramic dielectric resonators using whispering gallery mode method

AU - Ratheesh, R.

AU - Sebastian, M.T.

AU - Mohanan, P.

AU - Tobar, Michael

AU - Hartnett, John

AU - Woode, R.A.

AU - Blair, David

PY - 2000

Y1 - 2000

N2 - A microwave dielectric ceramic resonators based on BaCe(2)Ti(5)0(15) and Ba5Nb4O15 have been prepared by conventional solid state ceramic route. The dielectric resonators (DRs) have high dielectric constant 32 and 40 for BaCe2Ti5O15 and Ba5Nb4O15, respectively. The whispering gallery mode (WGM) technique was employed for the accurate determination of the dielectric properties in the microwave frequency range. The BaCe2Ti5O15 and Ba5Nb4O15 have quality factors (Q X F) of 30,600 and 53,000 respectively. The quality factor is found to depend on the azimuthal mode numbers. The temperature coefficient of resonant frequency (tau(f)) of BaCe2Ti5O15 and Ba5Nb4O15 have been measured accurately using different resonant modes and are +41 and +78 ppm/K, respectively. (C) 2000 Elsevier Science B.V. All rights reserved.

AB - A microwave dielectric ceramic resonators based on BaCe(2)Ti(5)0(15) and Ba5Nb4O15 have been prepared by conventional solid state ceramic route. The dielectric resonators (DRs) have high dielectric constant 32 and 40 for BaCe2Ti5O15 and Ba5Nb4O15, respectively. The whispering gallery mode (WGM) technique was employed for the accurate determination of the dielectric properties in the microwave frequency range. The BaCe2Ti5O15 and Ba5Nb4O15 have quality factors (Q X F) of 30,600 and 53,000 respectively. The quality factor is found to depend on the azimuthal mode numbers. The temperature coefficient of resonant frequency (tau(f)) of BaCe2Ti5O15 and Ba5Nb4O15 have been measured accurately using different resonant modes and are +41 and +78 ppm/K, respectively. (C) 2000 Elsevier Science B.V. All rights reserved.

U2 - 10.1016/S0167-577X(00)00118-X

DO - 10.1016/S0167-577X(00)00118-X

M3 - Article

SN - 0167-577X

VL - 45

SP - 279

EP - 285

JO - Materials Letters

JF - Materials Letters

ER -

Microwave characterisation of BaCe2Ti5O15 and Ba5Nb4O15 ceramic dielectric resonators using whispering gallery mode method

Abstract

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