Patent US3210767A successfully refreshed from Google Patents.
US3210767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency independent unidirectional antennas
Assignee: University of Illinois at Urbana-Champaign
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Filing: 1960-05-03
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Granted: 1965-10-05
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Expires: 1980-05-03
Abstract
No abstract record available.
Inventors
- 👤 Dwight E Isbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:11
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
AN ANTENNA SYSTEM FOR WIDE-BAND USE COMPRISING AN ARRAY OF AT LEAST THREE LINEAR SUBSTANTIALLY PARALLEL CONDUCTING DIPOLES, EACH DIPOLE BEING COMPOSED OF TWO OPPOSITE SUBSTANTIALLY COLLINEAR CONDUCTING ELEMENTS, A TWO-CONDUCTOR BALANCED FEEDER HAVING ONE CONDUCTOR CONNECTED TO EACH OF SAID ELEMENTS AT SUBSTANTIALLY THE INNER END THEREOF, ADJACENT PARALLEL DIPOLE ELEMENTS BEING REVERSELY CONNECTED TO A DIFFERENT CONDUCTOR OF THE FEEDER, THE TWO ELEMENTS OF EACH DIPOLE BEING OF SUBSTANTIALLY EQUAL LENGTH AND SUCCESSIVE ELEMENTS BEING OF LENGHTS WHICH DIFFER FROM ONE DIPOLE TO THE NEXT BY A SUBSTANTIALLY CONSTSANT SCALE FACTOR WITHIN THE RANGE FROM ABOUT 0.8 TO ABOUT 0.95, THE DIPOLES BEING SPACED FROM EACH OTHER IN A GENERALLY DECREASING MANNER IN THE DIRECTION OF DECREASING ELEMENT LENGTH, AND MEANS TO CONNECT THE FEEDER CONDUCTORS TO AN EXTERNAL CIRCUIT AT SUBSTANTIALLY THE LOCATION OF THE SMALLEST DIPOLE ELEMENTS.
Claim 2
Dependent Claim
141 words
AN ANTENNA SYSTEM FOR WIDE-BAND USE COMPRISING AN ARRAY OF AT LEAST THREE LINEAR SUBSTANTIALLY PARALLEL CONDUCTING DIPOLES, EACH DIPOLE BEING COMPOSED OF TWO OPPOSITE SUBSTANTIALLY COLLINEAR CONDUCTING ELEMENTS, A TWO-CONDUCTOR BALANCED FEEDER HAVING ONE CONDUCTOR CONNECTED TO EACH OF SAID ELEMENTS AT SUBSTANTIALLY THE INNER END THEREOF, ADJACENT PARALLEL DIPOLE ELEMENTS BEING REVERSELY CONNECTED TO A DIFFERENT CONDUCTOR OF THE FEEDER, THE TWO ELEMENTS OF EACH DIPOLE BEING OF SUBSTANTIALLY EQUAL LENGTH AND SUCCESSIVE ELEMENTS BEING OF LENGHTS WHICH DIFFER FROM ONE DIPOLE TO THE NEXT BY A SUBSTANTIALLY CONSTSANT SCALE FACTOR WITHIN THE RANGE FROM ABOUT 0.8 TO ABOUT 0.95, THE DIPOLES BEING SPACED FROM EACH OTHER IN A GENERALLY DECREASING MANNER IN THE DIRECTION OF DECREASING ELEMENT LENGTH, AND MEANS TO CONNECT THE FEEDER CONDUCTORS TO AN EXTERNAL CIRCUIT AT SUBSTANTIALLY THE LOCATION OF THE SMALLEST DIPOLE ELEMENTS.
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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |