US5289198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-folded monopole
Assignee: United States Department of the Air Force
•
Filing: 1992-08-21
•
Granted: 1994-02-22
•
Expires: 2012-08-21
Abstract
Abstract A double-folded monopole is used on a linear antenna to produce a traveling-wave distribution of current. The double fold is positioned one-quarter wavelength from the end of the antenna. The resultant antenna has three radiating elements that are orthogonal with respect to each other. The orthogonal folded dipoles each consist of five segments designed so that the currents have comparable magnitudes and are in phase to provide near hemispherical coverage.
Inventors
- 👤 Edward E. Altshuler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:19
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/30; H01Q9/42; H01Q9/44
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
136 words
A double folded monopole antenna comprising: a ground plane; a monopole stud with a center axis and an outer end which extends above and is perpendicular to said ground plane; and double fold radiating elements which are electrically connected and fixed to said monopole stud, wherein said double fold radiating elements comprise: a first and second V-shaped radiating fold which have points of their V-shapes in contact respectively with each other so that the first and second V-shaped radiating folds form a double folded shape that resembles an X with said X having a center aligned with the center axis of the monopole stud, wherein the center of the double folded shape that resembles an X is located on said monopole stud at a distance equalling one-quarter wavelength from the outer end of the monopole stud.
Claim 2
Dependent Claim
136 words
A double folded monopole antenna comprising: a ground plane; a monopole stud with a center axis and an outer end which extends above and is perpendicular to said ground plane; and double fold radiating elements which are electrically connected and fixed to said monopole stud, wherein said double fold radiating elements comprise: a first and second V-shaped radiating fold which have points of their V-shapes in contact respectively with each other so that the first and second V-shaped radiating folds form a double folded shape that resembles an X with said X having a center aligned with the center axis of the monopole stud, wherein the center of the double folded shape that resembles an X is located on said monopole stud at a distance equalling one-quarter wavelength from the outer end of the monopole stud.
Claim 3
Dependent Claim
43 words
A double folded monopole antenna, as defined in claim 1, wherein said double fold radiating elements project out sideways from said monopole stud to a distance which extends approximately one-quarter wavelength on either side out from said center axis of said monopole stud.
Claim 4
Dependent Claim
89 words
A double folded monopole antenna comprising: a ground plane; and a monopole stud with a center axis and an outer end which projects through, extends above and is perpendicular to said ground plane, and wherein said monopole stud is formed from a continuous antenna wire which is bent in folds to form four half-fold radiating elements which are parallel to each other on either side of said axis and electrically connected and fixed to said monopole stud at about one-quarter wavelength from the outer end of the monopole stud.
Claim 5
Dependent Claim
89 words
A double folded monopole antenna comprising: a ground plane; and a monopole stud with a center axis and an outer end which projects through, extends above and is perpendicular to said ground plane, and wherein said monopole stud is formed from a continuous antenna wire which is bent in folds to form four half-fold radiating elements which are parallel to each other on either side of said axis and electrically connected and fixed to said monopole stud at about one-quarter wavelength from the outer end of the monopole stud.
Claim 6
Dependent Claim
37 words
A double folded monopole antenna, as defined in claim 3, wherein said half-fold radiating elements project out from said monopole stud to a distance which extends approximately one-quarter wavelength from said center axis of said monopole stud.
Claim 7
Dependent Claim
139 words
A double fold dipole antenna, for outputting the signal generated by a signal source, said double folded dipole antenna comprising; first and second monopole studs which are each electrically connected to the signal source; first and second double fold radiating elements which are respectively electrically connected and fixed to the first and second monopole studs, wherein the first and second double fold radiating elements each comprise a first and second V-shaped radiating fold which have the points of their V-shapes in contact with each other so that the first and second V-shaped radiating folds form a double folded shape that resembles an X with said X having a center aligned with a center axis of the first and second monopole studs; and a two wire transmission line that connects the first and second monopole studs to the signal source.
Claim 8
Dependent Claim
139 words
A double fold dipole antenna, for outputting the signal generated by a signal source, said double folded dipole antenna comprising; first and second monopole studs which are each electrically connected to the signal source; first and second double fold radiating elements which are respectively electrically connected and fixed to the first and second monopole studs, wherein the first and second double fold radiating elements each comprise a first and second V-shaped radiating fold which have the points of their V-shapes in contact with each other so that the first and second V-shaped radiating folds form a double folded shape that resembles an X with said X having a center aligned with a center axis of the first and second monopole studs; and a two wire transmission line that connects the first and second monopole studs to the signal source.
Claim 9
Dependent Claim
121 words
A double fold dipole antenna, for outputting the signal generated by a signal source, said double folded dipole antenna comprising: first and second monopole studs which are each electrically connected to the signal source; and first and second double fold radiating elements which are respectively electrically connected and fixed to the first and second monopole studs, wherein the first and second double fold radiating elements each comprise a first and second V-shaped radiating fold which have points of their V-shapes in contact with each other so that the first and second V-shaped radiating folds form a double folded shape that resembles an X with said X having a center aligned with a center axis of the first and second monopole studs.
Claim 10
Dependent Claim
121 words
A double fold dipole antenna, for outputting the signal generated by a signal source, said double folded dipole antenna comprising: first and second monopole studs which are each electrically connected to the signal source; and first and second double fold radiating elements which are respectively electrically connected and fixed to the first and second monopole studs, wherein the first and second double fold radiating elements each comprise a first and second V-shaped radiating fold which have points of their V-shapes in contact with each other so that the first and second V-shaped radiating folds form a double folded shape that resembles an X with said X having a center aligned with a center axis of the first and second monopole studs.
References Cited (Backward Citations)
US2485138A
Cited
US2533529A
Cited
US2702347A
Cited
US3875572A
Cited
US3952310A
Cited
US4423423A
Cited
US4629978A
Cited
JPS6482806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-21 | 1997-08-23 | 1998-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-21 | 2001-08-23 | 2002-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-21 | 2005-08-23 | 2006-02-22 | $7700.00 | Window Closed / Lapsed |