Dielectric resonator for microwave band

• US 4,812,791 A
• Filed: 02/18/1987
• Issued: 03/14/1989
• Est. Priority Date: 02/18/1986
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Makimoto, Mitsuo, Ohba, Motoi
• Primary Examiner(s): Nussbaum, Marvin L.
• Application Number:
  US07/016,086
• Time in Patent Office: 755 Days
• Field of Search: 333/202, 333/204, 333/205, 333/206, 333/219, 333/207, 333/222-226, 333/235, 333/246, 331/96, 331/101, 331/117 D
• US Class Current: 333/219
• CPC Class Codes: H01P 7/082 Microstripline resonators H01P7/088 takes precedence
• CPC Class Codes: H01P 7/10 Dielectric resonators

Abstract

A resonator for microwave or VHF-UHF bands has a ring dielectric plate, one surface of which is metalized to make a resonant line, and at least one of other surfaces of which is also metalized to make a grounded or earth conductor. The resonator is very small in size and has a large unloaded Q value. Several embodiments are disclosed.

Claims

1. A dielectric resonator for the microwave band, said resonator comprising:

a dielectric member having a closed tubular shape comprising inner and outer circumferential surfaces and flat end surfaces;

a resonant line conductor disposed on one of said flat end surfaces of the dielectric member; and

a grounding conductor disposed on the other of said flat end surface of the dielectric member.

2. A resonator as claimed in claim 1,

wherein said tubular dielectric member is cylindrical.

3. A resonator as claimed in claim 1,

wherein said tubular dielectric member is square.

4. A resonator as claimed in claim 1,

wherein said first metal layer has respective end portions spaced from each other across a gap extending from said inner circumferential surface to said outer circumferential surface whereby a resonator of a half-wavelength is provided.

5. A resonator as claimed in claim 4,

and further comprising a capacitive element extending across said gap and connected between said end portions of the first metal layer.

6. A dielectric resonator for the microwave band, said resonator comprising;

a closed loop-shaped member comprised of a dielectric and having opposite flat end surfaces;

a first conductive member extending over a substantial portion of one of said flat end surfaces, the first conductive member having respective end portions spaced apart from one another across a slit,

a second conductive member extending over the other of said flat end surfaces, the second conductive member having a closed-loop shape; and

a capacitive element extending across said slit and connected between said end portions of the first conductive member.

7. A dielectric resonator as claimed in claim 6,

wherein said closed loop-shaped member has a circular cross-section.

8. A dielectric resonator as claimed in claim 6,

wherein said closed loop-shaped member has a square cross-section.

9. A dielectric resonator for the microwave band, said resonator comprising:

a closed ring comprised of a dielectric,

said closed ring having an inner circumferential surface, an outer circumferential surface, and respective flat end surfaces each of which extends between said inner and said outer circumferential surfaces;

a first metal layer extending over one of said surfaces, the first metal layer being a resonant line and having respective end portions spaced from each other across a gap whereby a resonator of a half-wavelength is provided;

a second metal layer extending over at least one of the other of said surfaces, said second metal layer being a grounding conductor; and

a capacitive element extending across said gap and connected between said end portions.

10. A dielectric resonator for the microwave band, said resonator comprising:

a closed ring comprised of a dielectric,

said closed ring having an inner circumferential surface, an outer circumferential surface, and respective flat end surfaces each of which is disposed between said inner and said outer circumferential surfaces;

a first metal layer extending over one of said respective flat end surfaces and having a closed loop shape, the first metal layer being a resonant line; and

a second metal layer extending over the other of said flat end surfaces, said second metal layer being a grounding conductor.

11. A dielectric resonator for the microwave band, said resonator comprising:

a closed ring comprised of a dielectric,

said closed ring having an inner circumferential surface, and outer circumferential surface, and respective flat end surfaces each of which is disposed between said inner and said outer circumferential surfaces;

a first metal layer extending over one of said respective flat end surfaces and having a closed loop shape, the first metal layer being a resonant line; and

a second metal layer extending contiguously over said inner and said outer circumferential surfaces and said other of said respective flat end surfaces, said second metal layer being a grounding conductor.

12. A dielectric resonator for the microwave band, said resonator comprising:

a closed ring comprised of a dielectric,

said closed ring having an inner circumferential surface, an outer circumferential surface, and respective flat end surfaces each of which is disposed between said inner and said outer circumferential surfaces;

a first metal layer extending over said outer circumferential surface and having a closed loop shape, the first metal layer being a resonant line; and

a second metal layer extending contiguously over said inner circumferential surface and said respective flat end surfaces, said second metal layer being a grounding conductor.

13. A dielectric resonator for the microwave band, said resonator comprising:

a closed ring comprised of a dielectric,

said closed ring having an inner circumferential surface, an outer circumferential surface, and respective flat end surfaces each of which is disposed between said inner and said outer circumferential surfaces;

a first metal layer extending over said inner circumferential surface and having a closed loop shape, the first metal layer being a resonant line; and

a second metal layer extending contiguously over said outer circumferential surface and said respective flat end surfaces, said second metal layer being a ground conductor.