Title :
Advances in NIST dielectric measurement capability using a mode-filtered cylindrical cavity
Author :
Vanzura, E.J. ; Kissick, W.A.
Author_Institution :
Nat. Inst. of Stand. & Technol., Boulder, CO, USA
Abstract :
A 60-mm-diameter cylindrical cavity resonator has been constructed for performing high-accuracy permittivity measurements on low-loss materials at about 10 GHz. The design is based on the use of a mode-filtered, circular waveguide for the walls of the resonant cavity. This results in high-Q TE/sub 01n/ resonances (75000 or greater) that are relatively free of interference from unwanted modes. Estimated errors in seven parameters result in approximately 0.2% uncertainty in permittivity and 6% uncertainty in loss tangent for a fused silica measurement.<>
Keywords :
cavity resonators; dielectric loss measurement; measurement errors; microwave measurement; permittivity measurement; 10 GHz; NIST; cavity resonator; circular waveguide; dielectric measurement capability; errors; fused SiO/sub 2/; high-Q TE/sub 01n/ resonances; loss tangent; low-loss materials; mode-filtered cylindrical cavity; permittivity measurements; uncertainty; Cavity resonators; Dielectric materials; Dielectric measurements; Interference; NIST; Performance evaluation; Permittivity measurement; Resonance; Silicon compounds; Tellurium;
Conference_Titel :
Microwave Symposium Digest, 1989., IEEE MTT-S International
Conference_Location :
Long Beach, CA, USA
DOI :
10.1109/MWSYM.1989.38868
