US3896402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric waveguide filters
Assignee: Post Office
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Filing: 1974-02-19
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Granted: 1975-07-22
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Expires: 1994-02-19
Abstract
Abstract A plurality of coupled dielectric regions immersed in a surrounding dielectric medium permits frequency selective energy transfer between the regions. The waveguide regions include parallel coupled sections. The length of the sections and the spacing therebetween determine the magnitude and frequencies of the energy coupled to and propagated by the waveguide regions.
Inventors
- 👤 Lynden Ashbrooke Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:36
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/52; H01; H01P; H01P1/00; H01P1/20; H01P1/213; H01P3/00; H01P3/16
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
156 words
A dielectric waveguide filter assembly comprising in combination a dielectric medium, a plurality of dieleCtric waveguide regions totally immersed in said medium, each of said regions having an energy input port and an energy output port, a first of said dielectric waveguide regions having a first length that is spaced from and parallel to a first length of a second of said dielectric waveguide regions, the first lengths and the spacing therebetween permitting a transfer from one region to the other of energy lying in a specified frequency band, the said second of said dielectric waveguide regions having a second length spaced from and parallel to a first length of a third of said dielectric waveguide regions, the second length, the first length of said second dielectric waveguide region and the spacing therebetween permitting a transfer between said second dielectric waveguide region to said third dielectric waveguide region of energy lying on another specified frequency band.
Claim 2
Dependent Claim
156 words
A dielectric waveguide filter assembly comprising in combination a dielectric medium, a plurality of dieleCtric waveguide regions totally immersed in said medium, each of said regions having an energy input port and an energy output port, a first of said dielectric waveguide regions having a first length that is spaced from and parallel to a first length of a second of said dielectric waveguide regions, the first lengths and the spacing therebetween permitting a transfer from one region to the other of energy lying in a specified frequency band, the said second of said dielectric waveguide regions having a second length spaced from and parallel to a first length of a third of said dielectric waveguide regions, the second length, the first length of said second dielectric waveguide region and the spacing therebetween permitting a transfer between said second dielectric waveguide region to said third dielectric waveguide region of energy lying on another specified frequency band.
Claim 3
Dependent Claim
150 words
A dielectric waveguide filter assembly comprising in combination a dielectric medium, a plurality of dielectric waveguide regions totally immersed in said medium, each of said regions having an energy input port and an energy output port, a first of said dielectric waveguide regions having a first length that is spaced from and parallel to a first length of a second of said dielectric waveguide regions, the first lengths and the spacing therebetween permitting a transfer from one region to the other of energy lying in a specified frequency band, the said first dielectric waveguide regions having a second length that is spaced from and parallel to a length of a third of said dielectric waveguide regions, said second length, said length of said second dielectric waveguide region and the spacing therebetween permitting the transfer between said first region and said third region of energy lying in another specified frequency band.
Claim 4
Dependent Claim
150 words
A dielectric waveguide filter assembly comprising in combination a dielectric medium, a plurality of dielectric waveguide regions totally immersed in said medium, each of said regions having an energy input port and an energy output port, a first of said dielectric waveguide regions having a first length that is spaced from and parallel to a first length of a second of said dielectric waveguide regions, the first lengths and the spacing therebetween permitting a transfer from one region to the other of energy lying in a specified frequency band, the said first dielectric waveguide regions having a second length that is spaced from and parallel to a length of a third of said dielectric waveguide regions, said second length, said length of said second dielectric waveguide region and the spacing therebetween permitting the transfer between said first region and said third region of energy lying in another specified frequency band.
Claim 5
Dependent Claim
116 words
A dielectric waveguide filter assembly comprising in combination a dielectric medium, at least three dielectric waveguide regions totally immersed in said medium, two of said regions being coupled together over lengths thereof parallel to and spaced apart one from the other, the lengths and the spacing therebetween permitting the transfer between the coupled regions of energy lying in a specified frequency band, the third dielectric waveguide region being coupled to one of said two dielectric waveguide regions over further lengths parallel to and spaced from one another, the further lengths and spacing therebetween permitting the transfer between said third dielectric waveguide region and said one dielectric waveguide region of energy lying in another specified frequency band.
Claim 6
Dependent Claim
116 words
A dielectric waveguide filter assembly comprising in combination a dielectric medium, at least three dielectric waveguide regions totally immersed in said medium, two of said regions being coupled together over lengths thereof parallel to and spaced apart one from the other, the lengths and the spacing therebetween permitting the transfer between the coupled regions of energy lying in a specified frequency band, the third dielectric waveguide region being coupled to one of said two dielectric waveguide regions over further lengths parallel to and spaced from one another, the further lengths and spacing therebetween permitting the transfer between said third dielectric waveguide region and said one dielectric waveguide region of energy lying in another specified frequency band.
Claim 7
Dependent Claim
35 words
A dielectric waveguide filter assembly as claimed in claim 3 wherein the ends of the coupled lengths are defined by increasing the separation of the waveguide regions to a value at which energy transfer ceases.
Claim 8
Dependent Claim
23 words
A dielectric waveguide filter assembly as claimed in claim 3 wherein an electrically-conducting screen interposed between the waveguide regions terminates the coupled length.
Claim 9
Dependent Claim
21 words
A dielectric waveguide filter assembly as claimed in claim 3 in which the waveguide regions and the dielectric medium are isotropic.
Claim 10
Dependent Claim
31 words
A dielectric waveguide filter assembly as claimed in claim 3 wherein the waveguide regions are supported by at least one conducting plane and the combination totally immersed in the dielectric medium.
Claim 11
Dependent Claim
16 words
A dielectric waveguide filter assembly as claimed in claim 7 wherein there are two conducting planes.
Claim 12
Dependent Claim
20 words
A dielectric waveguide filter assembly as claimed in claim 3 wherein the waveguide regions are of substantially rectangular transverse cross-section.
Claim 13
Dependent Claim
20 words
A dielectric waveguide filter assembly as claimed in claim 3 wherein the waveguide regions are of substantially circular transverse cross-section.
Claim 14
Dependent Claim
20 words
A dielectric waveguide filter assembly as claimed in claim 3 wherein the waveguide regions are of substantially elliptical transverse cross-section.
Claim 15
Dependent Claim
29 words
A dielectric waveguide filter assembly as claimed in claim 3 wherein the waveguide regions are Joined by a web of material of the same dielectric constant as the wageguides.
Claim 16
Dependent Claim
36 words
A dielectric waveguide filter assembly as claimed in claim 9 wherein the waveguide regions are supported by a tube, the waveguide regions being formed as internal ribs at the opposite ends of diameters of the tube.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |