Measurements of the effective electrodynamical parameters of Nb microstrip resonator

• Published in: Physica. C, Superconductivity Vol. 341; pp. 2675 - 2676
• Main Authors: Dravin, V.A., Karuzskii, A.L., Krapivka, A.E., Osipova, N.A., Perestoronin, A.V.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2000
• ISSN: 0921-4534; 1873-2143
• DOI: 10.1016/S0921-4534(00)01459-3

An experimental method for simultaneous determination of the effective dielectric permittivity and the effective length of a microstrip resonator is developed. The method is based on partial filling of a resonator cavity by the dielectric medium with low, controllably variable permittivity. For microstrip resonators partially filled with helium, the reciprocal linear dependence of squared frequency on helium permittivity was found experimentally. Coefficients of this linear dependence have been related to the effective permittivity and the effective length of the microstrip resonator. The proposed technique for prompt and precise determination of the effective parameters of a microwave unit needs neither special test fixtures and circuit standardization nor additional model assumptions. Effective parameters have been measured for superconducting halfware microstrip resonators in microwaves.