US3851334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collision avoidance and station keeping antenna system
Assignee: United States Department of the Navy
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Filing: 1972-09-19
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Granted: 1974-11-26
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Expires: 1992-09-19
Abstract
Abstract A method of applying a circularly symmetric antenna system to collision avoidance and station keeping with the ability to respond retrodirectively. Specifically, airborne or surface vehicles may employ a method which determines the relative bearing between the vehicles from a single interrogation of one vehicle by the other.
Inventors
- 👤 H Coleman
- 👤 W Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:49
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/765; G01S13/02; G01S13/06; G01S13/42; G01S13/44; G01S13/4454; G01S13/88; G01S13/93; G01S13/933
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 words
A method of determining the direction and bearing between a first and a second vehicle comprising: interrogating said first vehicle by transmitting a first signal from said second vehicle; said first vehicle receiving said first signal and then determining the bearing of said second vehicle; encoding the bearing of said second vehicle to form a second signal and transmitting said second signal; receiving said second signal by said second vehicle; determining the bearing of the first vehicle; and decoding said second signal to obtain the bearing information from the second signal.
Claim 2
Independent Claim
91 words
A method of determining the direction and bearing between a first and a second vehicle comprising: interrogating said first vehicle by transmitting a first signal from said second vehicle; said first vehicle receiving said first signal and then determining the bearing of said second vehicle; encoding the bearing of said second vehicle to form a second signal and transmitting said second signal; receiving said second signal by said second vehicle; determining the bearing of the first vehicle; and decoding said second signal to obtain the bearing information from the second signal.
Claim 3
Dependent Claim
13 words
The method as claimed in claim 1 wherein both vehicles are in motion.
Claim 4
Dependent Claim
16 words
The method as claimed in claim 1 wherein one of the two vehicles is in motion.
Claim 5
Dependent Claim
17 words
The method as claimed in claim 1 wherein said vehicles are operated on a two dimensional plane.
Claim 6
Dependent Claim
17 words
The method as claimed in claim 1 wherein said vehicles are operated in a three dimensional space.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |