HIGH FREQUENCY MODULE

• US 20010054944A1
• Filed: 01/29/1999
• Published: 12/27/2001
• Est. Priority Date: 01/29/1998
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: SAKAMOTO, KOICHI, KATO, TAKATOSHI, FUJII, YASUTAKA, YAMASHITA, SADAO, IIO, KENICHI, HIRATSUKA, TOSHIRO
• Granted Patent: US 6,369,676 B2
• Time in Patent Office: Days
• US Class Current: 333/219.1
• CPC Class Codes: H03B 2200/0024 including parallel striplines
• CPC Class Codes: H03B 2200/004 including a variable capacitance, e.g. a varicap, a varactor or a variable capacitance of a diode or transistor
• CPC Class Codes: H03B 2201/0208 the means being an element with a variable capacitance, e.g. capacitance diode
• CPC Class Codes: H03B 5/1852 the semiconductor device being a field-effect device
• CPC Class Codes: H03B 5/1876 the semiconductor device being a field-effect device

Abstract

A high-frequency module which includes a dielectric resonator defined by a dielectric sheet; a pair of electrodes formed on each of the main surfaces of the dielectric sheet and having aligned openings which form a dielectric resonator; a substrate stacked on the sheet; and lines disposed on the substrate for being coupled to the dielectric resonator. At least one of the lines is curved and is disposed just inside the opening and runs substantially along the edges of the openings.

Claims

1. A high-frequency module comprising:

a dielectric sheet having two opposed main surfaces;

electrodes disposed on both main surfaces of the sheet;

a pair of openings formed respectively in the electrodes and having corresponding aligned edges so as to provide a dielectric resonator;

first and second conductive lines disposed on a substrate, said substrate being stacked on said dielectric sheet, said lines being magnetically coupled to the dielectric resonator; and

a conductive case containing said substrate and said dielectric sheet;

wherein said first line has a first portion arranged along a path which runs substantially along said edges of the openings.

2. A high-frequency module according to

claim 1

, wherein said second line has an end which is resistively terminated and another end which is connected to a negative resistance circuit, said resonator being comprised in an oscillator.

3. A high frequency module according to

claim 1

, wherein said first line has an end which is connected to a variable reactive element, and said second line has an end which is resistively terminated and another end which is connected to a negative resistance circuit, said resonator being comprised in an oscillator.

4. A high-frequency module according to

claim 1

, wherein said first line crosses the edges of the openings at one point.

5. A high-frequency module according to

claim 1

, wherein said edges have a curved shape and said first line portion has substantially the same curved shape.

6. A high-frequency module according to

claim 5

, wherein said edges and said first line portion have a substantially circular shape and wherein said first line portion runs a substantially constant distance inside said edges.

7. A high-frequency module according to

claim 6

, wherein said first line portion is disposed substantially 0.4 mm inwardly from said edges.

8. A high-frequency module according to

claim 7

, wherein said dielectric sheet and substrate have relative dielectric constants of 24 and 3.4, respectively, and said dielectric resonator has a resonant frequency of 30 GHz.

9. A high-frequency module according to

claim 1

, wherein said second line is substantially straight.

10. A high-frequency module according to

claim 9

, wherein said second line crosses the edges of the opening at two points.

11. A high-frequency module according to

claim 3

, wherein said second line has a first portion which is arranged along a path which runs substantially along the edges of the openings.

12. A high-frequency module according to

claim 1

, wherein said second line has a first portion which is arranged along a path which runs substantially along the edges of the openings.

13. A high-frequency module according to

claim 12

, wherein said second line crosses the edges of the opening at two points.

14. A high-frequency module according to

claim 12

, wherein said edges and said first portion of said second line have a substantially circular shape and wherein said first portion of said second line runs a substantially constant distance inside said edges.

15. A high-frequency module according to

claim 14

, wherein said first portion of said second line is disposed substantially 0.4 mm inwardly from said edges.

16. A high-frequency module comprising:

a dielectric sheet having two opposed main surfaces;

electrodes disposed on both main surfaces of the sheet;

a pair of openings formed respectively in the electrodes and having corresponding aligned edges so as to provide a dielectric resonator;

a conductive line disposed on a substrate, said substrate being stacked on said dielectric sheet, said line being magnetically coupled to the dielectric resonator; and

a conductive case containing said substrate and said dielectric sheet;

wherein said line has a first portion arranged along a path which runs substantially along said edges of the openings.

17. A high-frequency module according to

claim 16

, wherein a first end of said line is grounded through a resistor, and a second end of said line is connected to a field-effect transistor, said resonator being comprised in an oscillator.

18. A high-frequency module according to

claim 17

, wherein said line has a first portion which is arranged along a path which runs substantially along the edges of the openings.

19. A high-frequency module according to

claim 16

, wherein said line has a first portion which is arranged along a path which runs substantially along the edges of the openings.

20. A high-frequency module according to

claim 19

, wherein said line crosses the edges of the opening at two points.

21. A high-frequency module according to

claim 16

, wherein said line crosses the edges of the opening at two points.