US 2003/0197579 A1 · High-frequency filter

Abstract

A high-frequency filter using a dielectric resonator includes an insulating substrate on which an input linear conductor and an output linear conductor are formed in parallel to each other, and a dielectric resonator which is coupled to the substrate. The dielectric resonator is arranged so that the direction of the center magnetic field of the dielectric resonator becomes approximately parallel to the substrate and becomes approximately at right angles to the linear conductors. With such an arrangement, a high-frequency filter, in which fine adjustment of a coupling factor and a resonance frequency is easy while maintaining Q of the dielectric resonator to be high, whose size can be reduced, and which can be mounted inexpensively is provided.

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Claims6

Dependent claims

A high-frequency filter comprising:

an insulating substrate;
a linear input conductor formed on the surface of said insulating substrate;
a linear output conductor formed substantially in parallel to said input conductor on the same surface of said input conductor of said insulating substrate;
and
a dielectric resonator which is coupled to said insulating substrate, said dielectric resonator being provided between said input conductor and said output conductor with respect to a direction perpendicular to the extension direction of said input conductor and said output conductor,
wherein said dielectric resonator is arranged so that the direction of the center magnetic field generated in said dielectric resonator when a high-frequency signal is input to said input conductor becomes substantially parallel to said insulating substrate and becomes approximately at right angles to the extension direction of said input conductor and said output conductor.

3 more elements

Dependencies are inferred from the claim text.

Description6,665 words

Summary3,000 words

#1. Field of the Invention

#The present invention relates to high-frequency filters used in wireless communication apparatuses and wired communication apparatuses.

#2. Description of the Related Art

Brief description of the drawings10 figures

#FIG. 1 is a perspective view showing an embodiment of a dielectric resonator 1 of a high-frequency filter according to the present invention;

#FIG. 2 is a perspective view showing the relationship between the magnetic field of the dielectric resonator of FIG. 1 and a substrate;

#FIG. 3 is a perspective view of the dielectric resonator of FIG. 1 when seen from a direction different from that of FIG. 2;

Detailed description3,467 words

#The preferred embodiments of the present invention will now be described below with reference to the drawings.

#An embodiment of a dielectric resonator in a high-frequency filter of the present invention is shown in the perspective view of FIG. 1. An embodiment in a case where the dielectric resonator of FIG. 1 is brought in close proximity to a substrate is shown in the perspective view of FIG. 2. A perspective view of the dielectric resonator of FIG. 1 when seen from a direction different from that in FIG. 2 is shown in FIG. 3.

#In FIG. 1, a dielectric resonator 7 according to the present invention has an overall shape of a cylindrical shape, a circular pillar shape, or a disc shape. The shape and the configuration (composition) of the dielectric resonator in the high-frequency filter of the present invention, which are basically the same as those of the above-described conventional dielectric resonator, can be used. That is, the dielectric resonator is made from a dielectric material having a high dielectric constant, and as the basic overall shape, a suitable shape, such as a cylindrical shape, a circular pillar shape, a disc shape, or a ring shape, can be selected.

High-frequency filter

Life of this patent

High-frequency filter

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims6

Description6,665 words

Drawings

Classification2 codes

Life of this patent

Description6,665 words