US4593460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method to achieve a desired bandwidth at a given frequency in a dielectric resonator filter
Assignee: CTS Corp
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Filing: 1983-12-30
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Granted: 1986-06-10
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Expires: 2003-12-30
Abstract
Abstract There is provided a method and a corresponding apparatus for establishing the proper bandwidth at one frequency in a microwave, dielectric resonator waveguide filter. Bandwidth is determined by the product of the resonant center frequency and the interresonator coupling coefficient. The interresonator coupling coefficient has been found to vary depending upon the interresonator spacing as well as the position at which the resonators intercept the electromagnetic field distributed across the waveguide. This method establishes the proper combination of field-intercepting position and interresonator spacing such that the proper bandwidth is established at one frequency.
Inventors
- 👤 Mark A. Gannon
- 👤 Francis R. Yester, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:35
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/207; H01P1/208; H01P1/2084; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016; Y10T29/4902
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
94 words
A method for mounting and locating dielectric resonators in a filter comprising the sequential steps of: spacing dielectric resonators to provide interresonator coupling at the frequency of interest, then, positioning the elevation of all of the resonators with respect to an electromagnetic field distributed about the resonator to achieve a desired bandwidth, whereby the longitudinal spacing between dielectric resonators is spaced to provide interresonator coupling over the frequency spectrum of interest, and the desired bandwidth about the center frequency is obtained by altering the elevational position at which the resonators intercept the electromagnetic field.
Claim 2
Independent Claim
94 words
A method for mounting and locating dielectric resonators in a filter comprising the sequential steps of: spacing dielectric resonators to provide interresonator coupling at the frequency of interest, then, positioning the elevation of all of the resonators with respect to an electromagnetic field distributed about the resonator to achieve a desired bandwidth, whereby the longitudinal spacing between dielectric resonators is spaced to provide interresonator coupling over the frequency spectrum of interest, and the desired bandwidth about the center frequency is obtained by altering the elevational position at which the resonators intercept the electromagnetic field.
Claim 3
Dependent Claim
17 words
A method as claimed in claim 1 wherein the dielectric resonator filter further comprises: a bandpass filter.
Claim 4
Dependent Claim
17 words
A method as claimed in claim 2 wherein the dielectric resonator filter further comprises: a waveguide filter.
Claim 5
Dependent Claim
16 words
A method as claimed in claim 2 wherein the dielectric resonator filter comprises: a microstrip filter.
Claim 6
Dependent Claim
17 words
A method as claimed in claim 2 wherein the dielectric resonator filter further cpmprises: a microwave filter.
Claim 7
Dependent Claim
18 words
A method as claimed in claim 1 wherein the dielectric resonator filter further comprises: a band elimination filter.
Claim 8
Dependent Claim
17 words
A method as claimed in claim 6 wherein the dielectric resonator filter further comprises: a waveguide filter.
Claim 9
Dependent Claim
16 words
A method as claimed in claim 6 wherein the dielectric resonator filter comprises: a microstrip filter.
Claim 10
Dependent Claim
17 words
A method as claimed in claim 6 wherein the dielectric resonator filter further comprises: a microwave filter.
Claim 11
Dependent Claim
17 words
A method as claimed in claim 1 wherein iterations are at least partially performed by statistical modelling.
Claim 12
Dependent Claim
17 words
A method as claimed in claim 1 wherein iterations are at least partially performed by computer simulation.
Claim 13
Dependent Claim
17 words
A method as claimed in claim 1 wherein the electromagnetic field is supported in a transmission medium.
Claim 14
Dependent Claim
14 words
A method as claimed in claim 12 wherein the transmission medium is a waveguide.
Claim 15
Dependent Claim
14 words
A method as claimed in claim 12 wherein the transmission medium is a microstrip.
Claim 16
Dependent Claim
14 words
A method as claimed in claim 12 wherein the transmission medium is free space.
Claim 17
Dependent Claim
16 words
A method as claimed in claim 1 wherein the elevational positioning is performed with a substrate.
Claim 18
Dependent Claim
15 words
A method as claimed in claim 1 wherein the elevational positioning is performed with pedestals.
Claim 19
Dependent Claim
22 words
A method as claim in claim 17 wherein the pedestals are of a low dielectric constant with respect to the dielectric resonators.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |