US4647933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phased antenna array for wind profiling applications
Assignee: United States Department of Commerce
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Filing: 1984-10-31
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Granted: 1987-03-03
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Expires: 2004-10-31
Abstract
Abstract A diagonal phased antenna array for use as a wind profiler by means of Doppler shift measurements comprises a plurality of Yagi-Uda antennas which are oriented in a predetermined direction such that Yagi-Uda antennas have a polarization 45 DEG offset from the principal planes of operation of the antenna array resulting in similar radiation patterns subject to a geometric taper in the array aperture with respect to the principal planes.
Inventors
- 👤 David C. Hogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:44
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/06; H01Q21/061; H01Q21/067; G; G01; G01S; G01S13/00; G01S13/88; G01S13/95; G01S13/951; Y; Y02; Y02A; Y02A90/00; Y02A90/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A method for wind profiling comprising the steps of: arranging individual antenna elements into a polarized array; positioning the array such that the polarization is 45° from orthogonal first and second principal planes of operation; phasing the individual antenna elements so that the antenna array generates radiation beams directed in the principal planes; alternately switching the phasing such that the antenna array directs a beam in the first principal plane and then in the second principal plane; periodically transmitting at a predetermined frequency a burst of pulses through the antenna array; receiving reflected pulses between periods of transmission; measuring the time elapsed between when a pulse is transmitted and when a pulse is received for each beam direction and computing altitude; determining the frequency difference between the received reflected pulse and the transmitted pulses for each beam direction; generating wind component vectors using the frequency difference and the beam direction information; and calculating wind direction and speed using the wind component vectors.
Claim 2
Independent Claim
162 words
A method for wind profiling comprising the steps of: arranging individual antenna elements into a polarized array; positioning the array such that the polarization is 45° from orthogonal first and second principal planes of operation; phasing the individual antenna elements so that the antenna array generates radiation beams directed in the principal planes; alternately switching the phasing such that the antenna array directs a beam in the first principal plane and then in the second principal plane; periodically transmitting at a predetermined frequency a burst of pulses through the antenna array; receiving reflected pulses between periods of transmission; measuring the time elapsed between when a pulse is transmitted and when a pulse is received for each beam direction and computing altitude; determining the frequency difference between the received reflected pulse and the transmitted pulses for each beam direction; generating wind component vectors using the frequency difference and the beam direction information; and calculating wind direction and speed using the wind component vectors.
References Cited (Backward Citations)
US3790950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |