US4617573A
Expired / Lapsed
US
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Method for obtaining a linear cellular array employing cosine-squared antenna patterns
Assignee: Motorola Solutions Inc
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Filing: 1984-12-19
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Granted: 1986-10-14
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Expires: 2004-12-19
Abstract
Abstract A method for obtaining a linear cellular array employing cosine-squared antenna patterns is disclosed. The array herein described provides an essentially infinite linear band of coverage utilizing only six frequencies. The embodiment of this invention provides early frequency reuse and superior co-channel interference to existing cellular systems used today. An alternate embodiment provides total area coverage along selected portions or the entire linear band of cellular coverage.
Inventors
- 👤 Allen L. Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:22
CPC Classifications
H; H04; H04W; H04W16/00; H04W16/02; H04W16/12; H01; H01Q; H01Q21/00; H01Q21/06; H01Q5/00; H01Q5/40
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
236 words
A method for obtaining a linear cellular pattern, over a geographic area, with optimum frequency reuse and minimum co-channel interference, comprising the steps of: establishing a first, second and third cell module each having a triad of geometrically shaped cells tangentially spaced at substantially 120° about a center cell, each cell having a directional antenna located on the cell perimeter positioned adjacent to said center cell such that at least said antennas of said triad radiate outwardly at approximately 120° from each other; establishing a first cell cluster by combining said first, second and third cell modules such that said triads of said first and second cell modules are conterminously interleaved and said center cells are merged into a common center cell, and said triad of said third cell module is conterminously interleaved with said first and second cell modules such that one cell of said third triad is merged with said common center cell of said first and second cell modules, and said center cell of said third cell module is merged with one cell of either said first or second cell module such that said cell cluster has a substantially longitudinal semblance; assigning said first, second and third cell modules a first, second or third frequency; positioning said first cell cluster in a geographic area such that said first cell cluster is aligned with the linear direction of the geographic area to be covered.
Claim 2
Independent Claim
236 words
A method for obtaining a linear cellular pattern, over a geographic area, with optimum frequency reuse and minimum co-channel interference, comprising the steps of: establishing a first, second and third cell module each having a triad of geometrically shaped cells tangentially spaced at substantially 120° about a center cell, each cell having a directional antenna located on the cell perimeter positioned adjacent to said center cell such that at least said antennas of said triad radiate outwardly at approximately 120° from each other; establishing a first cell cluster by combining said first, second and third cell modules such that said triads of said first and second cell modules are conterminously interleaved and said center cells are merged into a common center cell, and said triad of said third cell module is conterminously interleaved with said first and second cell modules such that one cell of said third triad is merged with said common center cell of said first and second cell modules, and said center cell of said third cell module is merged with one cell of either said first or second cell module such that said cell cluster has a substantially longitudinal semblance; assigning said first, second and third cell modules a first, second or third frequency; positioning said first cell cluster in a geographic area such that said first cell cluster is aligned with the linear direction of the geographic area to be covered.
Claim 3
Dependent Claim
25 words
The method for obtaining a linear cellular pattern, as described in claim 1, wherein said geometrically shaped cell comprises a cell having a hexagonal semblance.
Claim 4
Dependent Claim
19 words
The method of claim 2, wherein each of said directional antennas comprise an antenna having a cosine-squared illumination pattern.
Claim 5
Dependent Claim
130 words
The method for obtaining a linear cellular pattern, as described in claim 3, wherein said method further comprises the steps of: establishing a second cell cluster utilizing the method for establishing said first cell cluster; assigning a fourth frequency to said triad of cells of said third cell module, a fifth frequency to said triad of cells of said second cell module and a sixth frequency to said triad of cells of said third cell module; conterminously positioning said second cell cluster in a tandem configuration to at least one face of said first cell cluster aligned with said linear direction of said geographic area to be covered; and repeating in an alternate manner said tandem positioning of said first and second cell clusters until said geographic area is covered.
Claim 6
Dependent Claim
42 words
The method for obtaining a linear cellular pattern, as described in claim 4, wherein said first and second cell clusters each have at least one omni-directional antenna positioned substantially central to said geographic area covered by said first and second cell clusters.
Claim 7
Dependent Claim
94 words
The method for obtaining a linear cellular pattern, as described in claim 4, wherein a method for changing the direction of said linear pattern, terminous in said first cell cluster, comprises the steps of: conterminously positioning said second cell cluster to said first cell cluster such that the logitudinal semblance of said second cell cluster is directed angularly away from said first cell cluster; repeating in an alternate manner said tandem positioning of said first and second cell clusters in a direction, said direction aligned with said longitudinal semblance of said second cell cluster.
Claim 8
Dependent Claim
94 words
The method for obtaining a linear cellular pattern, as described in claim 4, wherein a method for changing the direction of said linear pattern, terminous in said second cell cluster, comprises the steps of: conterminously positioning said first cell cluster to said second cell cluster such that the logitudingal semblance of said first cell cluster is directed angularly away from said second cell cluster; repeating in an alternate manner said tandem positioning of said first and second cell clusters in a direction, said direction aligned with said logitudinal semblance of said first cell cluster.
Claim 9
Dependent Claim
146 words
A method for obtaining a cellular pattern, as described in claim 4, wherein said linear pattern is employed to provide total area coverage comprising the steps of: establishing a third and fourth cell cluster utilizing the method for establishing said first cell cluster; assigning said first, second and third cell module of said third cell cluster a seventh, eighth or ninth frequency; assigning said first, second and third cell module of said fourth cell cluster a tenth, eleventh, or twelfth frequency; conterminously positioning said first and second cell clusters in an alternating tandem arrangement forming a first linear pattern having a substantially longitudinal semblance; conterminously positioning said third and fourth cell clusters in an alternating tandem arrangement forming a second linear pattern having a substantially longitudinal semblance; conterminously positioning said first and second linear patterns in an alternating longitudinal arrangement until said geographic area is covered.
Claim 10
Dependent Claim
46 words
The method for obtaining a linear cellular pattrn, as described in claim 8, wherein said first, second, third and fourth cell clusters each have at least one omni-directional antenna positioned substantially central to said geographic area covered by said first, second, third and fourth cell clusters.
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) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |