# US 5,705,966 A · LC-type dielectric strip line resonator

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- Number: US 5,705,966 A
- Document ID: US5705966A
- Status: Granted
- Kind: A
- Application number: 08/691,790
- Filed: 1996-08-02
- Granted: 1998-01-06
- Earliest claimed: 1996-08-02
- Assignees: I.T.-Tel Ltd.
- Inventors: Moshe Carmi
- Web page: https://patentgrep.com/patent/US5705966A

## CPC

- H01P 7/082: {Microstripline resonators (H01P7/088 takes precedence)}
- H01P 7/084: {Triplate line resonators (H01P7/088 takes precedence)}
- H03H 7/0123: {comprising distributed impedance elements together with lumped impedance elements}
- H01P: WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B)
- H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P)

## Abstract

A novel LC-type network consisting of distributed inductors and capacitors realized by means of printed patterns on a printed circuit board is disclosed. The LC-type network is based on a dielectric strip line two terminal resonance circuit consisting of a capacitance and inductance in parallel which forms a high Q resonator suitable for application in the construction of high frequency filters and oscillators. Constructing the resonator on a printed circuit board provides for high accuracy and repeatability. In addition, the need for trimming and/or tuning is eliminated thus lowering production costs.

## Claims

### Claim 1

An LC-type dielectric strip line resonator, comprising:
a dielectric material having a dielectric constant, an upper surface and a lower surface;
a conductive rectangular strip line stub having a length l.sub.2, a width, an input portion and a ground portion, said length of said stub greater than said width of said stub, said input portion for receiving an input signal from an external circuit;
a first connecting strip line stub formed on said upper surface of said dielectric material, said first connecting stub coupled to one side of said input portion of said stub, said first connecting stub having a width approximately that of said stub;
a second connecting strip line stub formed on said upper surface of said dielectric material, said second connecting stub coupled to the opposite side of said input portion of said stub, said second connecting stub having a width approximately that of said stub;
a first conductive rectangular strip line wing formed on said upper surface of said dielectric material, said first rectangular wing having a length l.sub.1 and a width, said first rectangular wing coupled to said first connecting stub;
a second conductive rectangular strip line wing formed on said upper surface of said dielectric material, said second rectangular wing having a length l.sub.1 and a width, said second rectangular wing coupled to said second connecting stub in symmetrical fashion with said first rectangular wing; and
a conductive ground plane formed on said lower surface of said dielectric material, said ground plane having a length and width large enough to cover said rectangular stub, said first connecting stub, said second connecting stub, said first rectangular wing and said second rectangular wing, said ground portion of said rectangular stub comprising at least one through hole electrically coupling said rectangular stub to said ground plane.

### Claim 2 (depends on 1)

The strip line resonator according to claim 1, wherein said length l.sub.1 of said first and second rectangular wings is equal to said length l.sub.2 of said rectangular stub.

### Claim 3 (depends on 1)

The strip line resonator according to claim 1, wherein said length l.sub.1 of said first and second rectangular wings is smaller than said length l.sub.2 of said rectangular stub.

### Claim 4 (depends on 1)

The strip line resonator according to claim 1, wherein said length l.sub.1 of said first and second rectangular wings is greater than said length l.sub.2 of said rectangular stub.

### Claim 5

An LC-type dielectric strip line resonator, comprising:
a dielectric material having a dielectric constant, an upper surface and a lower surface;
a conductive rectangular strip line stub having a length l.sub.2, a width, an input portion and a ground portion, said length of said stub greater than said width of said stub, said input portion for receiving an input signal from an external circuit;
a connecting strip line stub formed on said upper surface of said dielectric material, said connecting stub coupled to one side of said input portion of said stub, said connecting stub having a width approximately that of said stub;
a conductive rectangular strip line wing formed on said upper surface of said dielectric material, said rectangular wind having a length l.sub.1 and a width, said rectangular wing coupled to said first connecting stub;
a conductive ground plane formed on said lower surface of said dielectric material, said ground plane having a length and width large enough to cover said rectangular stub, said connecting stub and said rectangular wing, said ground portion of said rectangular stub comprising at least one through hole electrically coupling said rectangular stub to said ground plane.

### Claim 6 (depends on 1)

The strip line resonator according to claim 1, wherein said length l.sub.1 of said rectangular wing is equal to said length l.sub.2 of said rectangular stub.

### Claim 7 (depends on 1)

The strip line resonator according to claim 1, wherein said length l.sub.1 of said rectangular wing is smaller than said length l.sub.2 of said rectangular stub.

### Claim 8 (depends on 1)

The strip line resonator according to claim 1, wherein said length l.sub.1 of said rectangular wing is greater said length l.sub.2 of said rectangular stub.

### Claim 9

An LC-type dielectric strip line resonator, comprising:
a dielectric material having a dielectric constant, an upper surface and a lower surface;
a conductive rectangular strip line stub having a length l, a width, an input portion and a ground portion, said length of said stub greater than said width of said stub, said input portion for receiving an input signal from an external circuit;
a first conductive radial strip line wing formed on said upper surface of said dielectric material, said first rectangular wing having a length radius Ra and forming an angle A, said first radial wing coupled to one side of said input portion of said rectangular stub;
a second conductive strip line radial wing formed on said upper surface of said dielectric material, said second rectangular wing having a length radius Ra and forming an angle A, said second radial wing coupled to the opposite side of said input portion of said rectangular stub in symmetrical fashion with said first radial wing;
a conductive ground plane formed on said lower surface of said dielectric material, said ground plane having a length and width large enough to cover said rectangular stub, said first radial wing and said second radial wing, said ground portion of said rectangular stub comprising at least one through hole electrically coupling said rectangular stub to said ground plane.