Dielectric waveguide type filter and branching filter

Wave transmission lines and networks – Coupling networks – Wave filters including long line elements

Reexamination Certificate

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Details

C333S239000, C333S248000, C333S113000

Reexamination Certificate

active

06927653

ABSTRACT:
A cutoff waveguide path is provided in a part of a dielectric waveguide comprising a pair of main conductive layers formed on an upper and a lower surfaces of a dielectric and groups of conductive vias arranged in the direction of signal transmission with a space of a distance less than ½ of a signal wavelength between the conductive vias, and provided in the cutoff waveguide path is a resonator having dielectric vias formed of a dielectric having a higher dielectric constant than that of a dielectric forming the dielectric waveguide. With this construction, a dielectric waveguide type filter easily designed and manufactured can be obtained.

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Yoneyama “ Nonradiative dielectric waveguide for millimeter wave integrated circuits” IEEE Transactions on Microwave Theor and Techniques, vol. MTT-29, No. 11 Nov. 1981 pp. 1188-1192.
Yoneyama et al “Loss Measurements of Nonradiative dielectric waveguide” IEEE Transaction on Microwave Theory and Techniques, vol. MTT-32, No. 8 Aug. 1984, pp. 943-946.

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