Dielectric resonator, inductor, capacitor, dielectric filter, oscillator, and communication device

• US 20030137370A1
• Filed: 02/06/2003
• Published: 07/24/2003
• Est. Priority Date: 02/23/1999
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Ida, Yutaka, Tanaka, Hiroaki, Iio, Kenichi, Ishikawa, Yohei
• Granted Patent: US 6,828,867 B2
• Time in Patent Office: Days
• US Class Current: 333/219
• CPC Class Codes: H01P 7/10 Dielectric resonators
• CPC Class Codes: H04B 1/403 using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency

Abstract

A dielectric resonator includes a slot line constructed by providing a slot electrode having a spiral slot at either an external face of a dielectric layer or inside the dielectric layer and a shielding conductor provided at a predetermined distance from the slot electrode. The slot line is employed as a resonant line so as to provide a dielectric resonator, an inductor, a capacitor, a dielectric filter, an oscillator, and/or a communication device.

Claims

1. An oscillator for a predetermined frequency, comprising:

a negative resistance circuit; and

a dielectric resonator coupled to said negative resistance circuit, said dielectric resonator including;

a slot line comprising a slot electrode having a spiral slot disposed adjacent to a dielectric layer; and

a shielding conductor provided at a predetermined distance from said slot electrode;

wherein said slot line is resonant at said predetermined frequency.

3. A communication device comprising:

an oscillator according to claim 1;

said oscillator being comprised in a high-frequency circuit selected from the group consisting of a transmitter and a receiver.

2. A communication device for a predetermined frequency, comprising

a high-frequency circuit, said high-frequency circuit including at least one of an inductor and a capacitor having

a slot line comprising a slot electrode having a spiral slot disposed adjacent to a dielectric layer;

and

a shielding conductor provided at a predetermined distance from said slot electrode;

wherein;

an end of said slot line is a short-circuit end; and

the length of the slot is not more than one-eighth of a transmission wavelength of said slot line at said predetermined frequency.