Measurement of Dielectric Properties for Low-Loss Materials at Millimeter Wavelengths

被引:16
|
作者
Jones, Charles R. [1 ]
Dutta, Jo [1 ]
Yu, Guofen [2 ]
Gao, Yuanci [3 ]
机构
[1] N Carolina Cent Univ, Dept Phys, Durham, NC 27707 USA
[2] Univ Findlay, Dept Phys, Findlay, OH 45840 USA
[3] Univ Elect Sci & Technol China, Sch Elect Engn, Chengdu 610054, Peoples R China
基金
美国国家科学基金会;
关键词
Dielectric properties; Loss tangent; millimeter-wave; Open resonator; Phase-locked backward-wave oscillators; SiC; PERMITTIVITY; RESONATORS; WINDOWS;
D O I
10.1007/s10762-011-9795-4
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We describe here a system for accurate measurement of the dielectric properties of very low-loss materials in the 130 to 170 GHz frequency range. This system utilizes an open resonator with a quality factor similar to 1x10(6). Resonance curves for this resonator are acquired with a commercial spectrum analyzer equipped with an external millimeter-wave harmonic mixer. The excitation source is a backward-wave oscillator locked to the spectrum analyzer local oscillator via a digital phase-locked loop. This system permits rapid and accurate measurement of resonance curve line widths, permitting determination of loss tangents down to the 10(-6) range. Results are reported for silicon carbide (SiC), CVD diamond, sapphire, and quartz.
引用
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页码:838 / 847
页数:10
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