• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 26 Issue 3
Jun.  2013
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Article Contents
LU Zhiyuan, HOU Jianqiang, HAN Rixia, CHEN Rui, NIU Zhongqi. Testing Dielectric Properties of Biological Material by Dynamic Frequency Sweep Method for Multimode Cavity[J]. Journal of Southwest Jiaotong University, 2013, 26(3): 467-472. doi: 10.3969/j.issn.0258-2724.2013.03.012
Citation: LU Zhiyuan, HOU Jianqiang, HAN Rixia, CHEN Rui, NIU Zhongqi. Testing Dielectric Properties of Biological Material by Dynamic Frequency Sweep Method for Multimode Cavity[J]. Journal of Southwest Jiaotong University, 2013, 26(3): 467-472. doi: 10.3969/j.issn.0258-2724.2013.03.012

Testing Dielectric Properties of Biological Material by Dynamic Frequency Sweep Method for Multimode Cavity

doi: 10.3969/j.issn.0258-2724.2013.03.012
  • Received Date: 19 Jun 2012
  • Publish Date: 25 Jun 2013
  • The microwave nondestructive testing on dielectric constant of material needs several times to tune cavity system, which leads to low efficiency and high cost. Based on the cavity perturbation theory, an electromagnetic separation test system was designed, in which the TE10p (p is the odd number) oscillation mode was selected. A dynamic frequency sweep method for multiple oscillation modes in a cavity was proposed to measure the dielectric constant and electromagnetic energy loss for different kinds of trees. This method can simultaneously measure the dielectric constants and loss characteristics at three different frequencies, which greatly reduces the error caused by tuning cavity size in the single-frequency measurements. Repetitive test results on the dielectric constant of the polyltef material with the proposed method have error of lesser than 1%.

     

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