High-frequency transmission line

Wave transmission lines and networks – Long line elements and components – Waveguide elements and components

Reexamination Certificate

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C333S02200F, C333S248000, C333S08100R

Reexamination Certificate

active

06870449

ABSTRACT:
In a high-frequency transmission line that is used in a high-frequency band such as the microwave band or the millimeter wave band, at least one resistive film is disposed in a plane that is substantially perpendicular to an electric field of an operating transmission mode, and the resistive film attenuates, by dielectric loss, an unwanted mode having an electric field that is perpendicular to the electric field of the operating transmission mode.

REFERENCES:
patent: 3783401 (1974-01-01), Oltman, Jr.
patent: 5469128 (1995-11-01), Kawanishi et al.
patent: 5920245 (1999-07-01), Ishikawa et al.
patent: 6094106 (2000-07-01), Kishino et al.
patent: 6441698 (2002-08-01), Matsutani et al.
patent: 6657514 (2003-12-01), Tokudera et al.
patent: 0767507 (1997-04-01), None
patent: 57166701 (1982-10-01), None
“Millimeter Wave Integrated Circuits Using Nonradiative Dielectric Waveguide”; Tsukasa Yoneyama; Research Institute of Electrical Communication; C-I; vol. J73-C-I; No. 3, pp. 87-94; 1990.
“Design and Fabrication of a Nonradiative Dielectric Waveguide Circulator”; Hiroyuki Yoshinaga, et al.; IEEE Transactions on Microwave Theory and Techniques; vol. 36, No. 11; pp. 1526-1529; Nov. 1988.

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