Dielectric filter transmission-reception sharing unit and commun

Details Dielectric filter transmission-reception sharing unit and commun Dielectric filter transmission-reception sharing unit and commun

1999-04-29

2000-11-14

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

3332191, 333134, H01P 120, H01P 710, H01P 512

Patent

active

061475750

ABSTRACT:
A dielectric filter, a transmission-reception shared unit, and a communication device, which incorporate the filter, are disclosed; spurious modes among resonant modes of dielectric resonators formed on parts of a dielectric plate can be suppressed so as to improve attenuation characteristics. In the dielectric filter, an electrode having electrodeless parts is formed on both main surfaces of a dielectric plate so as to form dielectric resonators; and linear conductors as probes are formed on the upper surface of the dielectric plate, in which one of the linear conductors is coupled with the dielectric resonator so as to form a band elimination filter circuit and a low-band pass filter circuit is formed at a particular position on the other linear conductor. These band elimination filter circuit and low-band pass filter circuit allow signals of spurious modes to be cut off.

REFERENCES:
patent: 5786740 (1998-07-01), Ishikawa et al.
patent: 5914296 (1999-06-01), Shen
patent: 5945894 (1999-08-01), Ishikawa et al.
patent: 5986527 (1999-11-01), Ishikawa et al.
patent: 6016090 (2000-01-01), Iio et al.
patent: 6052087 (2000-04-01), Ishikawa et al.

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