Patent US3596272A successfully refreshed from Google Patents.
US3596272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary lobe and ghost-reduction antenna transmission-line system
Assignee: Blonder Tongue Laboratories Inc
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Filing: 1969-06-24
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Granted: 1971-07-27
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Expires: 1989-06-24
Abstract
Abstract This disclosure deals with a novel antenna apparatus embodying a nonradiating transmission line section feeding active antenna dipole elements and the like for operation over a multifrequency range, wherein use is made of resistance connected at a critical location across the nonradiating transmission line section for enabling the reduction of secondary lobes and interference in antenna reception or equivalent problems in antenna transmission.
Inventors
- 👤 Isaac S Blonder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:36
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
115 words
A multifrequency antenna system operating in multiwavelength modes and having a substantially nonradiating two-conductor openwire transmission-line section of predetermined characteristic impedance provided at a plurality of longitudinally spaced locations therealong with dipole antenna elements extending transversely therefrom and of different dimensions corresponding to the different wavelengths of the multifrequencies, the said dimensions being successively arranged substantially with a log periodic distribution, a parallel conductor twin lead feed transmission-line means connected near one end of the section, and resistance connected between the two conductors of said section near the other end and of value greater than the said predetermined characteristic impedance of said transmission-line section, said other end being adjacent the Longest-dimensioned dipoles of the system.
Claim 2
Dependent Claim
115 words
A multifrequency antenna system operating in multiwavelength modes and having a substantially nonradiating two-conductor openwire transmission-line section of predetermined characteristic impedance provided at a plurality of longitudinally spaced locations therealong with dipole antenna elements extending transversely therefrom and of different dimensions corresponding to the different wavelengths of the multifrequencies, the said dimensions being successively arranged substantially with a log periodic distribution, a parallel conductor twin lead feed transmission-line means connected near one end of the section, and resistance connected between the two conductors of said section near the other end and of value greater than the said predetermined characteristic impedance of said transmission-line section, said other end being adjacent the Longest-dimensioned dipoles of the system.
Claim 3
Dependent Claim
25 words
A multifrequency antenna system as claimed in claim 1, in which the said value of said resistance is several times the said predetermined characteristic impedance.
Claim 4
Dependent Claim
37 words
A multifrequency antenna system as claimed in claim 1, and in which the said predetermined characteristic impedance is of the order of 150-180 ohms and said resistance value is from substantially 2 to 5 times the same.
Claim 5
Dependent Claim
100 words
A multifrequency antenna system operating in multiwavelength modes and having a substantially nonradiating two-conductor parallel-wire tranmission-line section of predetermined characteristic impedance provided at a plurality of longitudinally spaced locations therealong with dipole antenna elements extending transversely therefrom and successively longer dimensions corresponding to the different wavelengths of the multifrequencies, a twin-lead feed transmission-line means connected near one end of the section, and resistance connected between the two conductors of said section near the other end, adjacent to the longest dimensioned dipole elements, and of value from substantially 2 to 5 times the said predetermined characteristic impedance of said transmission-line section.
Claim 6
Dependent Claim
100 words
A multifrequency antenna system operating in multiwavelength modes and having a substantially nonradiating two-conductor parallel-wire tranmission-line section of predetermined characteristic impedance provided at a plurality of longitudinally spaced locations therealong with dipole antenna elements extending transversely therefrom and successively longer dimensions corresponding to the different wavelengths of the multifrequencies, a twin-lead feed transmission-line means connected near one end of the section, and resistance connected between the two conductors of said section near the other end, adjacent to the longest dimensioned dipole elements, and of value from substantially 2 to 5 times the said predetermined characteristic impedance of said transmission-line section.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |