Complex Permeability and Complex Permittivity Measurement of Anisotropic Lossy Sheets Composed of Soft Magnetic Metal Powder and Rubber by Waveguide S-Parameter Method
スポンサーリンク
概要
- 論文の詳細を見る
The lossy magnetic composite material made from soft magnetic metal powder and rubber is widely used as an EMI countermeasure material, due to its higher magnetic loss than those of spinel ferrites in microwave frequencies. In this paper, we clarify the material characteristics by measuring the relative complex permeability ★^^★r and relative complex permittivity ★^^★r of two kinds of composite materials in microwave frequencies. Since the composite materials are anisotropic, both ★^^★r and ★^^★r are measured as diagonal tensors by utilizing extended S-parameter method. The results show that the imaginary part of ★^^★r of flaky-powder composite exceeded the Snoek's limit for the spinel ferrites which has been reported so far. The measured ★^^★and ★^^★ are partially compared with those measured by cavity resonator method, and good agreement is obtained.
- 社団法人電子情報通信学会の論文
- 2002-09-01
著者
-
NISHIKATA Atsuhiro
Tokyo Institute of Technology
-
Nishikata Atsuhiro
Tokyo Inst. Technol.
-
Nishikata A
Tokyo Inst. Technol. Tokyo Jpn
-
Saito Akihiko
Daido Steel Co. Ltd
-
Nishikata Atsuhiro
Tokyo Inst. Of Technol.
関連論文
- B-4-28 Tunable EM-wave Absorber below 1 GHz using Diode Lattice and its Evaluation by Large Stripline
- Development of Sound Localization System with Tube Earphone Using Human Head Model with Ear Canal(Engineering Acoustics)
- Low Frequency Equivalent Circuit of Dual TEM Cell for Shielding Material Measurement(Near-/Far-Field EM Absorption and Shielding)
- Free Space Measurement Method with Parallel Electromagnetic Wave Beam by Using Dielectric Lenses and Horn Antennas for Reflectivity of Electromagnetic Absorbers in Millimeter Waves(Near-/Far-Field EM Absorption and Shielding)
- Optimized Design of the Lossy Material for the Suppression of Coupling between Two Microstrip Lines in a Microwave Amplifier Module
- B-4-13 Influence of Imperfect TRL Calibration Standards on Permittivity Measurements in the Waveguide-Penetration Method
- Analysis of Errors in Permittivity Measurements Using the Waveguide-Penetration Method
- Complex Permeability and Complex Permittivity Measurement of Anisotropic Lossy Sheets Composed of Soft Magnetic Metal Powder and Rubber by Waveguide S-Parameter Method
- A New Calibration Algorithm Using Reference Materials for the Waveguide-Penetration Method
- The Analysis for the Microwave Reflectivity of Carbon TWF
- Analytical Solution for the Scattering by a Cylinder Perpendicular to the Narrow Walls inside a Rectangular Waveguide and Its Application to ε_r and μ_r Measurement