Patent US4169266A successfully refreshed from Google Patents.
US4169266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerial system for broadcasting having a passive middle antenna flanked by two end-fed antennas
Assignee: NPP TESHKA RADIOELEKTRONIKA
•
Filing: 1977-07-05
•
Granted: 1979-09-25
•
Expires: 1997-07-05
Abstract
Abstract An antenna system for broadcasting comprises a coplanar array of three vertical aerials spaced a quarter wavelength apart, the middle aerial serving as a passive reflector while the outer two are concurrently energized with currents of equal amplitude and frequency in phase or in phase opposition with each other. The resulting radiation pattern is circular in the first instance; in the second case the pattern is generally hourglass-shaped and bisected by the common plane of the aerials.
Inventors
- 👤 Hristo A. Bachvarov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:49
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/22; H01Q19/26; H01Q19/28; H01Q19/32; H01Q21/00; H01Q21/06; H01Q21/08; H01Q21/12; H01Q25/00; H01Q25/002
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
74 words
An antenna system for broadcasting, comprising: an aerial array consisting of a half-wavelength passive middle aerial flanked by two end-fed half-wavelength radiating outer aerials in a common vertical plane mounted over ground; and supply means connected to said outer aerials for energizing same with oscillations of substantially identical frequency and amplitude, each of said outer aerials being separated from said middle aerial by a distance substantially corresponding to a quarter wavelength of said oscillations.
Claim 2
Dependent Claim
74 words
An antenna system for broadcasting, comprising: an aerial array consisting of a half-wavelength passive middle aerial flanked by two end-fed half-wavelength radiating outer aerials in a common vertical plane mounted over ground; and supply means connected to said outer aerials for energizing same with oscillations of substantially identical frequency and amplitude, each of said outer aerials being separated from said middle aerial by a distance substantially corresponding to a quarter wavelength of said oscillations.
Claim 3
Dependent Claim
20 words
An antenna as defined in claim 1 wherein said middle aerial is grounded for direct current through a tuned circuit.
Claim 4
Dependent Claim
24 words
An antenna as defined in claim 1 wherein said oscillations are in phase with each other, said aerials emitting a substantially circular radiation pattern.
Claim 5
Dependent Claim
31 words
An antenna as defined in claim 1 wherein said oscillations are in phase opposition with each other, said aerials emitting a generally hourglass-shaped radiation pattern bisected by said common vertical plane.
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) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |