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电介质测量中的谐振腔Q因子特性
Alternative TitleCharacterization of the Q-factor of Resonatorfor Dielectric Measurements
倪尔瑚; 罗萍; 李涤徽; 北京8701信箱
Department国家863计划微波遥感技术实验室
Source Publication空间科学学报
2009
Volume29Issue:1Pages:73-77
ISSN0254-6124
Language中文
Keyword谐振腔 q因子测量 电介质测量
Abstract对同轴线-集中电容负载谐振腔,采用传输测量使用的3dB三频法决定有载Q1,计及谐振频率下的插入损耗后获得无载Qu,对同一腔体,也用单端口反射测量技术的xdB三频法,并通过测量回程损耗在谐振点和xdB点的输入反射系数振幅来获得无载Qu,在500MHz下40个不同的耦合状况下,两种方法得到无载Qu的算术平均值和标准差为2519±34,这两种技术被用来调节和实现传输型谐振腔的输入、输出的等耦合和电介质测量,本文从介质损耗测量的观点讨论了如何使用有载Q1和无载Qu.
Other AbstractThe transmission-type measurement of the Q-factor of a reentrant cavity is used to determine unloaded Q from the measured loaded Ql by the 3 dB three frequencies method together with insertion loss at the maximum output. Also, the one-port reflection technique is used to determine unloaded Q from the resonant frequency and the bandwidth measured at the dB point,as well as the magnitudes of the input reflection coefficient measured at both resonant frequency and x dB return loss for the same reentrant cavity. The arithmetic mean Qu was evaluated to be 2519±34 tested under the 40 various couplings at frequency 500 MHz by using transmission and reflection techniques. Finally, these techniques are applied to the realization and tuning of that the input and output couplings are identical to each other for a transmission-mode resonator. Meanwhile,the selection of Q-factor values in measurements of complex permittivity of dielectric materials is discussed.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1885
Collection微波遥感部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
倪尔瑚,罗萍,李涤徽,等. 电介质测量中的谐振腔Q因子特性[J]. 空间科学学报,2009,29(1):73-77.
APA 倪尔瑚,罗萍,李涤徽,&北京8701信箱.(2009).电介质测量中的谐振腔Q因子特性.空间科学学报,29(1),73-77.
MLA 倪尔瑚,et al."电介质测量中的谐振腔Q因子特性".空间科学学报 29.1(2009):73-77.
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