TELECOMMUNICATIONS AND RADIO ENGINEERING - 2010 Vol. 69,
No 14 		 

 

 

 

Quasi-Optical Annular Sapphire Resonator with Internal Cylindrical Conductor


A.A. Barannik and N.T. Cherpak
A. Usikov Institute of Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
«Address all correspondence to A.A. Barannik E-mail: barannik@ire.kharkov.ua
K.I. Torokhtyi
National Technical University “Kharkiv technical institute”,
21, Frunze St., Kharkiv, 61077, Ukraine

Abstract

A new approach to measurement of the surface resistance Rs  of large conductive samples is investigated. The technique for determining Rs  with the use of an open annular quasi-optical dielectric resonator in which whispering gallery modes are excited, is presented. The basic characteristics of the cavity resonator have been investigated both theoretically and experimentally within the frequency range from 30 to 40 GHz. The possibility to apply an annular dielectric resonator for measurement Rs  of high-temperature superconductors is demonstrated.

KEY WORDS:  surface resistance, Q-factor

References

  1. Cherpak, N., Barannik, A., Filipov, Yu. et al., (2003), Accurate microwave technique of surface resistance measurement of large-are HTS films using sapphire quasi-optical resonator, IEEE Trans. on Appl. Supercond. 13(2):3570-3573.
  2. Cherpak, N.T., Barannik, A.A., Prokopenko, Yu.V. et al., (2006), Microwave properties of HTS films: measurements in the millimeter wave range, Low Temperature Physics. 32(6):608-613.
  3. Egorov, V.N., Masalov, V.L. et al., (2005), Dielectric constant, loss tangent, and surface resistance of PCB materials at K-band frequencies, IEEE Trans. Microwave Theory Tech. 53(2):627-635.
  4. Shevchun, A.F., and Trunin, M.P., (2006), A technique for measuring surface impedance of superconducting materials within the temperature range 0.4 to 120 K, Radiotekhnika and Elektronika. 5:82-89 (in Russian).
  5. Barannik, A.A., Cherpak, N.T., and Prokopenko, Yu.V., (2007), Two-layered disc quasi-optical dielectric resonator: Electrodynamics and application perspectives for complex permittivity measurements of loosy liquids, Measurement Science and Technology. 18(19):2231-2238.
  6. Cherpak, N.T., Barannik, A.A., Bunyaev, S.A. et al., (2005), Measurements of millimeter-wave surface resistance and temperature dependence of reactance of thin HTS films using quasi-optical dielectric resonator, IEEE Trans. Applied Supercond. 15(2): 2919-2922.


pages 1221-1228

Back