Abstract
Taking ethylene propylene rubber and carbonyl iron powder as the coaxial sample, the effects of measuring error for its position in the coaxial line L1 and its length L2 on measuring results of electromagnetic parameters are studied by extracting scattering parameters from vector network analyzer HP8722ET. The method for reducing measuring errors is also presented. The results indicate that maximum relative errors between measured values and true values for relative permittivity's real part ε′ and imaginary part ε″, relative permeability's real part μ′ and imaginary part μ″ are 3.1%, 168.0%, 3.7% and -10.0% respectively when L1's absolute error is -0.08mm in the range of 2.6-18GHz, for ε′, ε″, μ′ and μ″ are 3.5%, 30.0%, 4.0% and 5.0% respectively when L2's relative error is -2% in the range of 2.6-18GHz. By employing optical microscope for static measurement of sample's length and using accessorial positioning fixture can reduce measuring errors and improve the accuracy of measuring results.
| Original language | English |
|---|---|
| Pages (from-to) | 293-297 |
| Number of pages | 5 |
| Journal | Dianbo Kexue Xuebao/Chinese Journal of Radio Science |
| Volume | 21 |
| Issue number | 2 |
| State | Published - Apr 2006 |
Keywords
- Electromagnetic parameters
- Microwave absorbing materials
- Transmission/reflection method