US3102268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spiral wound antenna with controlled spacing for impedance matching
Assignee: Brunswick Union Inc
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Filing: 1960-04-11
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Granted: 1963-08-27
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Expires: 1980-04-11
Abstract
No abstract record available.
Inventors
- 👤 William H Foley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:21
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/30; H01Q1/00; H01Q1/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A RADIO FREQUENCY ANTENNA WHICH IS ADAPTED TO BE CONNECTED TO A RADIO FREQUENCY TRANSMISSION LINE HAVING A PREDETERMINED CHARACTERISTIC IMPEDANCE, SAID ANTENNA COMPRISING: A CORE OF DIELECTRIC MATERIAL HAVING FIRST AND SECOND BARE WIRE STRANDS ENCIRCLING SAID CORE IN HELICAL FASHION TO FORM AN ANTENNA HAVING A LENGTH-DIAMETER RATIO WHICH IS CHOSEN TO ACHIEVE SAID PREDETERMINED CHARACTERISTIC IMPEDANCE APPROXIMATELY, SAID FIRST AND SECOND STRANDS BEING WOUND ABOUT SAID CORE IN OPPOSITE DIRECTIONS TO CROSS EACH OTHER AND MAKE CONTACT AT THE CROSSING POINTS TO FORM FINITE SPACES BETWEEN SAID STRANDS, SAID ANTENNA BEING IMPROVED BY SELECTING FOR EACH OF THE WOUND STRANDS A PARTICULAR PITCH ANGLE WITHIN A RANGE OF PITCH ANGLES THAT EFFECT THE RESISTANCE COMPONENT OF THE IMPEDANCE OF SAID ANTENNA, SAID RESISTANCE COMPONENT CHANGING FROM A LARGER VALUE FOR THE SMALLEST PITCH ANGLE IN SAID RANGE TO A SMALLER VALUE FOR THE LARGEST PITCH ANGLE IN SAID RANGE, WHEREBY SAID PREDETERMINED CHARACTERISTIC
Claim 2
Dependent Claim
156 words
A RADIO FREQUENCY ANTENNA WHICH IS ADAPTED TO BE CONNECTED TO A RADIO FREQUENCY TRANSMISSION LINE HAVING A PREDETERMINED CHARACTERISTIC IMPEDANCE, SAID ANTENNA COMPRISING: A CORE OF DIELECTRIC MATERIAL HAVING FIRST AND SECOND BARE WIRE STRANDS ENCIRCLING SAID CORE IN HELICAL FASHION TO FORM AN ANTENNA HAVING A LENGTH-DIAMETER RATIO WHICH IS CHOSEN TO ACHIEVE SAID PREDETERMINED CHARACTERISTIC IMPEDANCE APPROXIMATELY, SAID FIRST AND SECOND STRANDS BEING WOUND ABOUT SAID CORE IN OPPOSITE DIRECTIONS TO CROSS EACH OTHER AND MAKE CONTACT AT THE CROSSING POINTS TO FORM FINITE SPACES BETWEEN SAID STRANDS, SAID ANTENNA BEING IMPROVED BY SELECTING FOR EACH OF THE WOUND STRANDS A PARTICULAR PITCH ANGLE WITHIN A RANGE OF PITCH ANGLES THAT EFFECT THE RESISTANCE COMPONENT OF THE IMPEDANCE OF SAID ANTENNA, SAID RESISTANCE COMPONENT CHANGING FROM A LARGER VALUE FOR THE SMALLEST PITCH ANGLE IN SAID RANGE TO A SMALLER VALUE FOR THE LARGEST PITCH ANGLE IN SAID RANGE, WHEREBY SAID PREDETERMINED CHARACTERISTIC
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |