Patent US3633206A successfully refreshed from Google Patents.
US3633206A
Expired / Lapsed
US
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Lattice aperture antenna
Assignee: Individual
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Filing: 1967-01-30
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Granted: 1972-01-04
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Expires: 1987-01-30
Abstract
Abstract This invention is an antenna composed of an electromagnetic wave transmission line radiation aperture and a lattice wall sandwich facing across the wave path. The sandwich is spaced between the aperture and the outer region of the antenna. An equivalency circuit of the sandwich having at least one section of two capacitive layers shunted across codirectional through-conductors and disposed across opposite ends of a network with a series inductance in one of the through conductors and two inductances each shunted from an opposite end of the series inductance to the other of the through-conductors. The sandwich has an inductive lattice layer having nonconducting magnetic wall areas of thickness represented by the series inductance. Nonconducting magnetic areas are apertures in the conducting electrical wall areas. The inductive lattice layer has on each of its two sides capacitive layers and there is a predetermined distribution of antenna coupling reactance across the face of each layer of the lattice wall sandwich.
Inventors
- 👤 Edward Bellamy Mcmillan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:13
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/06; H01Q15/00; H01Q15/0006; H01Q15/0013; H01Q15/0026
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
163 words
An antenna comprising at least one electromagnetic wave transmission line radiation aperture and at least one lattice wall sandwich facing and across the wave path, said sandwich spaced between said aperture and the outer region of said antenna, the equivalent circuit of said sandwich having at least one section comprising two capacitative members shunted across codirectional through-conductors and disposed across opposite ends of a network, said network comprising a series inductance in one of said through conductors and two inductances each shunted from an opposite end of said series inductance to the other of said through conductors, said sandwich having at least one inductive lattice layer having nonconducting magnetic wall areas of thickness represented by said series inductance, said nonconducting magnetic areas being apertures in the conducting electrical wall areas, the inductive lattice layer having on each of its two sides capacitative layers, there being a predetermined distribution of antenna coupling reactance across the face of each layer of said lattice wall sandwich.
Claim 2
Dependent Claim
163 words
An antenna comprising at least one electromagnetic wave transmission line radiation aperture and at least one lattice wall sandwich facing and across the wave path, said sandwich spaced between said aperture and the outer region of said antenna, the equivalent circuit of said sandwich having at least one section comprising two capacitative members shunted across codirectional through-conductors and disposed across opposite ends of a network, said network comprising a series inductance in one of said through conductors and two inductances each shunted from an opposite end of said series inductance to the other of said through conductors, said sandwich having at least one inductive lattice layer having nonconducting magnetic wall areas of thickness represented by said series inductance, said nonconducting magnetic areas being apertures in the conducting electrical wall areas, the inductive lattice layer having on each of its two sides capacitative layers, there being a predetermined distribution of antenna coupling reactance across the face of each layer of said lattice wall sandwich.
Claim 3
Dependent Claim
126 words
The antenna of claim 1 wherein said inductive lattice layer is perforated through from face-to-face with magnetic areas having depth providing series inductance and insertion advance in a wave front direction through said areas, at least two of said areas sharing a magnetic interaction field, said areas being separated by a center-to-center distance of the order of a whole multiple of 0.6 wavelength to provide shunt inductance across each face of said lattice layer and the decrease the insertion advance of said wave front and spaced closer to increase said insertion advance, said capacitative covering layers dimensioned to provide insertion delay on each side of said two magnetic areas, the net insertion through said magnetic areas and capacitative layers representing a predetermine coupling across said aperture.
Claim 4
Dependent Claim
71 words
In the antenna of claim 2, the capacitative covering layer comprising a ringlike magnetic wall area having an outer planar periphery enclosing an axis of 0.6 to 1.2 wavelengths and an inner planar periphery whose axis is 0.2 to 0.45 of said outer axis, the lattice spacing between magnetic area centers being selected to approach a whole multiple of 0.6 wavelength and to separate nearby outer peripheries with an electric wall.
Claim 5
Dependent Claim
70 words
In the antenna of claim 2, the capacitative covering layer comprising a ringlike electric wall area having an outer planar peripHery enclosing an axis of 0.6 to 1.2 wavelengths and an inner periphery whose axis is 0.45 to 0.48 of said outer axis, the lattice spacing between electric area centers being selected to approach a whole multiple of 0.6 wavelength and to separate nearby outer peripheries with a magnetic wall.
Claim 6
Dependent Claim
15 words
The antenna of claim 1 wherein at least one capacitative layer is of varying thickness.
Claim 7
Dependent Claim
20 words
The antenna of claim 1 wherein the capacitative layers are of substantially equal insertion phase along at least one wavepath.
Claim 8
Dependent Claim
70 words
In the antenna of claim 2, the lattice layer comprising a ringlike magnetic wall area having an outer planar periphery enclosing an axis of 0.6 to 1.2 wavelengths and an inner planar periphery whose axis is 0.45 to 0.8 of said outer axis, the lattice spacing between magnetic area centers being selected to approach a whole multiple of 0.6 wavelength and to separate nearby outer peripheries with an electric wall.
Claim 9
Dependent Claim
76 words
In the antenna of claim 2, the lattice layer comprising magnetic areas defining the boundaries of a ringlike electric wall area having an outer planar periphery enclosing an axis of 0.6 to 1.2 wavelengths and an inner planar periphery whose axis is 0.2 to 0.45 of said outer axis, the lattice spacing between electric area centers being selected to approach a whole multiple of 0.6 wavelength and to separate nearby outer peripheries with a magnetic wall.
Claim 10
Dependent Claim
16 words
The antenna of claim 1 wherein the distribution of insertion advance is varied across said lattice.
Claim 11
Dependent Claim
165 words
The antenna of claim 1 wherein said inductive lattice layer is perforated through from face-to-face with magnetic area having depth providing series inductance and insertion advance in a wave front direction through said areas, at least two of said areas sharing a magnetic interaction field, said areas being separated by a center-to-center distance of the order of a whole multiple of 0.6 wavelength to provide shunt inductance across each face of said lattice layer and to decrease the insertion advance of said wave front and spaced closer to increase said insertion advance, said capacitative covering layers dimensioned to provide insertion delay on each side of said two magnetic areas, the net insertion through said magnetic areas and capacitative layers representing a predetermined coupling across said aperture, said lattice wall being subdivided into at least two codirectional conductive layers in sliding contact with each other, the individual perforations in said layers being in registration at successive positions and orientations of occlusion, partial occlusion and no occlusion.
Claim 12
Dependent Claim
137 words
The antenna of claim 1 wherein said inductive lattice layer is perforated through from face-to-face with magnetic areas having depth providing series inductance and insertion advance in a wave front direction through said areas, at least two of said areas sharing a magnetic interaction field, said areas being separated by a center-to-center distance of the order of a whole multiple of 0.6 wavelength to provide shunt inductance across each face of said lattice layer and to decrease the insertion advance of said wave front and spaced closer to increase said insertion advance, said capacitative covering layers dimensioned to provide insertion delay on each side of said two magnetic areas, the net insertion through said magnetic areas and capacitative layers representing a predetermined coupling across said aperture, said sandwich being substantially coplanar with at least one slot dipole.
Claim 13
Dependent Claim
104 words
The antenna of claim 2 in which at least two inductive areas of a lattice comprise each a larger magnetic wall area enclosed by an exterior electric wall and containing an interior conducting boundary defining a smaller electric wall and in which said capacitative layers covering said inductive areas on each side comprise each a dielectric layer, and at each frequency within a broad band the inductive lattice being geomEtrically proportioned and the dielectric constants and electrical thicknesses of said dielectric layers being selected to provide inductive and capacitative reactances, respectively, of opposite sign, the differences between said reactances being of substantially constant magnitude.
Claim 14
Dependent Claim
28 words
The antenna of claim 2 in which said lattice wall sandwich comprises a wave coupling cascade of at least three capacitative layers and at least two inductive layers.
Claim 15
Dependent Claim
62 words
The antenna of claim 2, in which at least one capacitative layer of said lattice wall sandwich comprises a dielectric layer subdivided into an outer layer substantially 0.5 radians thick and an inner sublayer having a dielectric constant at least the square of that of the outer layer and a reactance less than that of the inductive lattice layer which it covers.
Claim 16
Dependent Claim
20 words
The antenna of claim 2 in which said lattice wall sandwich comprises the electromagnetic wave radiation aperture of a waveguide.
Claim 17
Dependent Claim
21 words
The antenna of claim 10, in which at least one lattice wall sandwich comprises the reflector for at least one feed.
Claim 18
Dependent Claim
20 words
The antenna of claim 11 in which at least a portion of said antenna is a combination antenna and radome.
Claim 19
Dependent Claim
13 words
The antenna of claim 1 in which said lattice wall sandwich is ribbed.
Claim 20
Dependent Claim
12 words
The antenna of claim 1 in which said lattice wall is hollow.
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |