US3633210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unbalanced conical spiral antenna
Assignee: Lanteris Space LLC
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Filing: 1967-05-26
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Granted: 1972-01-04
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Expires: 1987-05-26
Abstract
Abstract A directional broadband antenna utilizing two dissimilar interleaved spiral radiators of conical configuration with radio equipment optionally housed in shield within dielectric conical support for radiators.
Inventors
- 👤 Charles Webster Westerman
- 👤 William G Scott
- 👤 William S Wales
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:57
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/36; H01Q1/38; H01Q11/00; H01Q11/02; H01Q11/08; H01Q11/083
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
136 words
A directional broadband antenna comprising two elongated electrical conductors shaped in a three-dimensional configuration such that (1) the projection thereof on a planar surface is a pair of separated interleaved spirals and (2) no two separate points on the axis of either of said conductors lie in any one plane parallel to said planar surface, said conductors being electrically dissimilar such that if two respective points on said conductors which lie in a plane parallel to said planar surface are excited by a radiofrequency voltage source, the resultant standing-wave current pattern in said conductors, and hence the resultant fields produced thereby, will be in phase over a corresponding portion of each of said conductors with respect to said coplanar points, whereby said antenna will be able to radiate efficiently even though said conductors are closely spaced.
Claim 2
Dependent Claim
136 words
A directional broadband antenna comprising two elongated electrical conductors shaped in a three-dimensional configuration such that (1) the projection thereof on a planar surface is a pair of separated interleaved spirals and (2) no two separate points on the axis of either of said conductors lie in any one plane parallel to said planar surface, said conductors being electrically dissimilar such that if two respective points on said conductors which lie in a plane parallel to said planar surface are excited by a radiofrequency voltage source, the resultant standing-wave current pattern in said conductors, and hence the resultant fields produced thereby, will be in phase over a corresponding portion of each of said conductors with respect to said coplanar points, whereby said antenna will be able to radiate efficiently even though said conductors are closely spaced.
Claim 3
Dependent Claim
35 words
The antenna of claim 1 wherein a portion of only one of said conductors has a zigzag configuration, the projection of the envelope of said zigzag portion conforming to part of one of said spirals.
Claim 4
Dependent Claim
22 words
The antenna of claim 1 further including a dielectric cone, said conductors being formed on the tapered surface of said dielectric cone.
Claim 5
Dependent Claim
64 words
The antenna of claim 1 further including a dielectric cone, said conductors bEing formed on the tapered surface of said dielectric cone, and further including a conductive enclosure positioned within said cone, said enclosure containing electronic means for supplying radiofrequency energy to said antenna, and means for coupling radiofrequency energy from said electronic means to a pair of coplanar points on said respective conductors.
Claim 6
Dependent Claim
22 words
The antenna of claim 4 in which said conductors are excited at the ends thereof at the narrower portion of said cone.
Claim 7
Dependent Claim
112 words
A broadband directional antenna comprising a conical dielectric support, a pair of conductors positioned on said support, said conductors having a configuration such that the projection thereof on a plane perpendicular to the axis of said cone is a pair of interleaved spirals, the end of one of said conductors being coplanar with and displaced from the end of the other by an angle of about 180*, said conductors being electrically dissimilar such that if said ends thereof are excited by a radiofrequency voltage source, the standing-wave current patterns in said conductors, and hence the resultant fields produced thereby, will be in phase over a corresponding portion of each of said conductors.
Claim 8
Dependent Claim
112 words
A broadband directional antenna comprising a conical dielectric support, a pair of conductors positioned on said support, said conductors having a configuration such that the projection thereof on a plane perpendicular to the axis of said cone is a pair of interleaved spirals, the end of one of said conductors being coplanar with and displaced from the end of the other by an angle of about 180*, said conductors being electrically dissimilar such that if said ends thereof are excited by a radiofrequency voltage source, the standing-wave current patterns in said conductors, and hence the resultant fields produced thereby, will be in phase over a corresponding portion of each of said conductors.
Claim 9
Dependent Claim
36 words
The antenna of claim 6 wherein one only of said conductors has a zigzag configuration over a portion of its length, the projection of the envelope of said zigzag forming part of one of said spirals.
Claim 10
Dependent Claim
26 words
The antenna of claim 6 further including a conductive enclosure positioned within said conical support, and also including a source of radiofrequency energy within said enclosure.
Claim 11
Dependent Claim
11 words
The antenna of claim 8 wherein said enclosure is cone shaped.
Claim 12
Dependent Claim
122 words
The antenna of claim 8 wherein said conductors are flat strips formed on said conical support, the width of said strips increasing toward the wider part of said support, one of said strips having a zigzag portion near the end thereof at the base of said support, the envelope of said zigzag portion forming part of one of said spirals, the end of said one strip having a U-shaped loading element connected thereto, a conical conductive enclosure having substantially the same taper angle as said conical support positioned within said support, said enclosure including a source of radiofrequency energy for exciting said antenna, and means coupling said source to the ends of said strips at the narrower end of said conical support.
References Cited (Backward Citations)
US2958081A
Cited
US3241148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |