US3764768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave applicator employing a broadside slot radiator
Assignee: Individual
•
Filing: 1972-05-19
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Granted: 1973-10-09
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Expires: 1992-05-19
Abstract
Abstract A microwave applicator for treating material with microwave energy is disclosed. The applicator includes a broadside radiator formed by a hollow elongated waveguide having an array of resonant slots communicating through the wall of the waveguide, such slots being spaced apart on their centers along the axis of the guide by one half a guide wavelength an array of slot loading members are disposed to project into the waveguide from alternate sides of adjacent slots for coupling microwave energy from the waveguide radiator through the slots in an in-phase relation to obtain a broadside radiator. The loading members may be separately adjusted for adjusting the energy profile coupled from the antenna to the load.
Inventors
- 👤 W Sayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:31
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/70; H05B6/705; H01; H01Q; H01Q21/00; H01Q21/0006; H01Q21/0037; H01Q21/0043; H05B6/707; H05B6/708; H05B6/78; H05B6/788
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
Apparatus for treating material with microwave energy comprising means for transporting material to be treated along a path of travel, two microwave broadside radiation applicators positioned along said path of travel for applying microwave energy to said material, each of said applicators forming means for delivering energy to said material in zones of high and low energy alternating across said path of travel, said applicators being positioned relative to each other transversely of said path of travel so that a given point on said material first passes one of said applicators at a zone of high energy and then passes the other of said applicators at a zone of low energy.
Claim 2
Dependent Claim
111 words
Apparatus for treating material with microwave energy comprising means for transporting material to be treated along a path of travel, two microwave broadside radiation applicators positioned along said path of travel for applying microwave energy to said material, each of said applicators forming means for delivering energy to said material in zones of high and low energy alternating across said path of travel, said applicators being positioned relative to each other transversely of said path of travel so that a given point on said material first passes one of said applicators at a zone of high energy and then passes the other of said applicators at a zone of low energy.
Claim 3
Dependent Claim
44 words
The apparatus of claim 1 wherein each of said applicators comprises a waveguide, a wall of said waveguide having an array of slots thereon through which energy can be delivered to said material in alternating zones of high and low energy across said path.
Claim 4
Dependent Claim
26 words
The apparatus of claim 2 wherein said waveguide is elongated about an axis, and wherein said slots are aligned with each other parallel to said axis.
Claim 5
Dependent Claim
10 words
The apparatus of claim 2 wherein said waveguide is rectangular.
Claim 6
Dependent Claim
55 words
The apparatus of claim 3 wherein the length of each of said slots in the direction parallel to said axis is approximately one-half a free-space wavelength at the operating frequency of said waveguide, and wherein said slots are spaced-apart on their centers along the axial direction of said waveguide by approximately one-half a waveguide wavelength.
Claim 7
Dependent Claim
94 words
Apparatus for treating material with microwave energy comprising means for transporting said material along a path, two microwave applicators positioned along said path, each of said applicators comprising broadside radiator means for coupling energy to said material in alternating zones of high and low energy across said path, said applicators being positioned relative to each other transversely of said path so that a given point on said material first passes one of said applicators at a zone of high energy and then passes the other of said applicators at a zone of low energy.
Claim 8
Dependent Claim
94 words
Apparatus for treating material with microwave energy comprising means for transporting said material along a path, two microwave applicators positioned along said path, each of said applicators comprising broadside radiator means for coupling energy to said material in alternating zones of high and low energy across said path, said applicators being positioned relative to each other transversely of said path so that a given point on said material first passes one of said applicators at a zone of high energy and then passes the other of said applicators at a zone of low energy.
Claim 9
Dependent Claim
43 words
The apparatus of claim 6 wherein each of said applicators comprises a hollow waveguide elongated about an axis, a wall of said waveguide having thereon an array of slots alligned with each other parallel to said axis to form said broadside radiator means.
Claim 10
Dependent Claim
10 words
The apparatus of claim 7 wherein said waveguide is rectangular.
Claim 11
Dependent Claim
55 words
The apparatus of claim 7 wherein the length of each of said slots in the direction parallel to said axis is approximately one-half a free-space wavelength At the operating frequency of said waveguide, and wherein said slots are spaced-apart on their centers along the axial direction of said waveguide by approximately one-half a waveguide wavelength.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |