Cut-Off Circular Waveguide Method for Dielectric Substrate Measurements in Millimeter Wave Range(General Methods, Materials, and Passive Circuits)(<Special Section>Advances in Characterization and Measurement Technologies for Microwave and Millimeter-Wave
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概要
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copyright(c)2004 IEICE許諾番号:07RB0174A novel resonator structure for the cut-off circular waveguide method is proposed to suppress the unwanted TE modes in the axial direction and TM modes in the radial direction. In this method, a dielectric plate sample is placed between two copper circular cylinders and clamped by two clips. The cylinder regions constitute the TE_<0m> mode cut-off waveguides. The measurement principle is based on a rigorous analysis by the Ritz-Galerkin method. Many resonance modes observed in the measurement can be identified effectively by mode charts. In order to verify the validity of the novel structure for this method, the temperature dependences for three low-loss organic material plates were measured in the frequency range 40 to 50 GHz. It is found that modified polyolefin plates have comparable electric characteristics and low price, compared with PTFE plates. Moreover, it is verified that the novel resonator structure is effective in improvement of accuracy and stability in measurement. The measurement precisions are estimated within 1 percent for ε_r and within 15 percent for tan δ.
- 一般社団法人電子情報通信学会の論文
- 2004-05-01
著者
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Kobayashi Yoshio
Faculty Of Engineering Ibaraki University
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Shimizu Takashi
Faculty Of Engineering Saitama University
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