US3868694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric directional antenna
Assignee: United States Department of the Air Force
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Filing: 1973-08-09
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Granted: 1975-02-25
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Expires: 1993-08-09
Abstract
Abstract A dielectric directional antenna using a wedge shaped dielectric with conducting exciters on each of the angular sides. One or both of the exciters can be triangular with side indentations and one exciter can be a ground conductor with a coaxial line feeding the exciters. A three-terminal amplifier can be connected to the conductors and the feed line.
Inventors
- 👤 Hans H Meinke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:59
CPC Classifications
H; H01; H01Q; H01Q23/00; H01Q13/00; H01Q13/20; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q9/0471; H01Q9/30; H01Q9/40
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
115 words
A directional antenna comprising: a. a wedge-shaped dielectric member having a pair of surfaces inclined to each other and joined at an intersection line; b. a first conducting surface mounted on one of the pair of dielectric surfaces and having the general shape of a triangle; c. a second conducting surface mounted on and extending beyond the other of the pair of dielectric surfaces with the first and second conducting surfaces forming a line of constant characteristic impedance; and d. means for feeding the antenna, the feEding means being connected to the apex of the triangle of the first conducting surface and on the second conducting surface in the immediate vicinity of the intersection line.
Claim 2
Dependent Claim
115 words
A directional antenna comprising: a. a wedge-shaped dielectric member having a pair of surfaces inclined to each other and joined at an intersection line; b. a first conducting surface mounted on one of the pair of dielectric surfaces and having the general shape of a triangle; c. a second conducting surface mounted on and extending beyond the other of the pair of dielectric surfaces with the first and second conducting surfaces forming a line of constant characteristic impedance; and d. means for feeding the antenna, the feEding means being connected to the apex of the triangle of the first conducting surface and on the second conducting surface in the immediate vicinity of the intersection line.
Claim 3
Dependent Claim
22 words
A directional antenna according to claim 1 wherein one of the conducting surfaces is at least a quarter of a wavelength long.
Claim 4
Dependent Claim
28 words
A directional antenna according to claim 1 wherein the characteristic impedance formed by the pair of conducting surfaces is equal to the characteristic impedance of the feeding means.
Claim 5
Dependent Claim
45 words
A directional antenna according to claim 1 wherein the wedge angle of the dielectric member is equal to arc cos co/vp Square Root epsilon r where co is the speed of light, vp is the phase velocity, and epsilon r is the relative dielectric constant.
Claim 6
Dependent Claim
43 words
A directional antenna according to claim 1 which further comprises a three-terminal amplifier with one terminal connected to the feed point of one conductor, one to the feed point of the other conductor, and one to the inner conductor of the coaxial line.
Claim 7
Dependent Claim
21 words
A directional antenna according to claim 5 wherein the triangle has indentations at the two sides that form the apex thereof.
Claim 8
Dependent Claim
55 words
A directional antenna according to claim 1 which further comprises a pair of flat conductors mounted on the dielectric member adjacent to the triangle but spaced therefrom and extending to the intersection line and connected to the extended conducting surface, the triangle and the flat conductor forming slots to resonate in the operating frequency range.
Claim 9
Dependent Claim
23 words
A directional antenna according to claim 7 wherein the surface of the wedge opposite the angle of the intersection line includes angular indentations.
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) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |