Patent US3732569A successfully refreshed from Google Patents.
US3732569A
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Aerial field simulation
Assignee: International Standard Electric Corp
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Filing: 1971-07-21
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Granted: 1973-05-08
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Expires: 1991-07-21
Abstract
Abstract Any arbitrary antenna array distribution can be represented as the sum of a symmetric and an antisymmetric function. The radiation at any point in the far field of the aerial array can then be simulated by adding together the symmetric and antisymmetric outputs in quadrature with the correct amplitude. This simplifies the construction of subsequent combining units since these reproduce the far field at any point by amplitude wieghting along without the need for differential phasing.
Inventors
- 👤 R Ashley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:24
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/08; G01R29/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
A method of simulating the far field at any arbitrary point thereof of any arbitrary symmetrical aerial array comprising: sampling the radio frequency currents flowing instantaneously within the individual aerials; combining the sampled currents in symmetrical pairs to phase shifting hybrid arrangements so as to produce symmetric and antisymmetric functions with respect to the center line of the array; applying predetermined amplitude weighting to the individual samples; and adding the symmetric and antisymmetric functions in quadrature to obtain a representative output.
Claim 2
Independent Claim
81 words
A method of simulating the far field at any arbitrary point thereof of any arbitrary symmetrical aerial array comprising: sampling the radio frequency currents flowing instantaneously within the individual aerials; combining the sampled currents in symmetrical pairs to phase shifting hybrid arrangements so as to produce symmetric and antisymmetric functions with respect to the center line of the array; applying predetermined amplitude weighting to the individual samples; and adding the symmetric and antisymmetric functions in quadrature to obtain a representative output.
Claim 3
Dependent Claim
25 words
A method according to claim 1 wherein said array contains an even number of aerial elements spaced symmetrically about a center line of said array.
Claim 4
Dependent Claim
56 words
A method according to claim 1 wherein said array contains an odd number of aerial elements, of which the central element is placed at the center line of the array and the remainder are spaced symmetrically on either side thereof, said central element being associated with those elements from which there are derived said symmetrical functions.
Claim 5
Independent Claim
79 words
An apparatus for simulating the far field at any arbitrary point thereof of any arbitrary symmetrical aerial array comprising: means for sampling the current flowing within each aerial of said array; phase shifting hybrids connected in symmetrical pairs to the sampling means for combining said current samples into symmetric and antisymmetric pairs; a plurality of weighting networks for weighting each output of said means for combining; and a combining unit for combining said symmetric and antisymmetric pairs in quadrature.
Claim 6
Independent Claim
79 words
An apparatus for simulating the far field at any arbitrary point thereof of any arbitrary symmetrical aerial array comprising: means for sampling the current flowing within each aerial of said array; phase shifting hybrids connected in symmetrical pairs to the sampling means for combining said current samples into symmetric and antisymmetric pairs; a plurality of weighting networks for weighting each output of said means for combining; and a combining unit for combining said symmetric and antisymmetric pairs in quadrature.
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |