Dielectric waveguide filter

Details Dielectric waveguide filter Dielectric waveguide filter

2007-01-30

2007-01-30

Ham, Seungsook (Department: 2817)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S239000

Reexamination Certificate

active

10502782

ABSTRACT:
A conductive layer is formed on each of the upper and lower surfaces of a dielectric substrate, and the two conductive layers are connected by rows of via-holes that are formed which a spacing that is less than or equal to ½ of the wavelength in the dielectric substrate in the resonance frequency, whereby n stages of dielectric resonators and input/output waveguide structures are formed. If the number n of stages is assumed to be 3, the first-stage resonator and the second-stage resonator are coupled by an electromagnetic field by means of via-holes of a first spacing; the second-stage resonator and the third-stage resonator are coupled by an electromagnetic by means of via-holes of a second spacing, whereby a filter is formed. The input/output waveguide structure and the filter are coupled by an electromagnetic by means of via-holes of a fourth spacing. The first-stage resonator and the third-stage resonator are coupled by an electromagnetic field by means of via-holes of a third spacing.

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Ito et al, “60-GHz-band Dielectric Waveguide Filters with Cross-coupling for Flip-chip Modules”, Microwave Symposium Digest, 2002 IEEE MTT-S International, vol. 3, Jun. 2-7, 2002, pp. 1789-1792.
Ito et al, “60-GHz-Band Planar Dielectric Waveguide Filters for Flip-Chip Modules”, IEEE Trans. on Microwave Theory & Tech., vol. 49, No. 12, Dec. 2001, pp. 2431-2436.
Japanese Office Action dated Feb. 1, 2005 with English translation of pertinent portions.

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