Patent US4340892A successfully refreshed from Google Patents.
US4340892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doppler navigation antenna having automatic land-sea error correction
Assignee: Siemens AG
•
Filing: 1970-12-07
•
Granted: 1982-07-20
•
Expires: 1990-12-07
Abstract
Abstract A doppler navigation antenna having automatic land-sea error correction through the utilization of two somewhat differently inclined lobe groups consisting of four lobes each, and employing a plane radiator group which comprises a plurality of individual radiators arranged in parallel rows. Each end of each radiator is fed by a pair of feed lines which extend transversely in the rows, the individual feed lines of each pair of feed lines having slightly different phase delay characteristics.
Inventors
- 👤 Anton Brunner
- 👤 Werner Jatsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:48
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/60; H; H01; H01Q; H01Q25/00; H01Q25/004
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
120 words
A doppler navigation antenna with automatic land-sea correction utilizing the production of two somewhat differently inclined lobe groups of four lobes each, comprising a plane radiator group including a plurality of individual radiating arrays arranged in parallel rows, each of said radiating arrays including two ends having respective feed points, a first pair of feed lines extending transversely of said radiating arrays and coupled thereto at the respective feed points at one end thereof, and a second pair of feed lines extending transversely of said radiating arrays and coupled thereto at the respective feed points at the other end thereof, one feed line of each pair having a different phase delay than the other feed line of the same pair.
Claim 2
Dependent Claim
120 words
A doppler navigation antenna with automatic land-sea correction utilizing the production of two somewhat differently inclined lobe groups of four lobes each, comprising a plane radiator group including a plurality of individual radiating arrays arranged in parallel rows, each of said radiating arrays including two ends having respective feed points, a first pair of feed lines extending transversely of said radiating arrays and coupled thereto at the respective feed points at one end thereof, and a second pair of feed lines extending transversely of said radiating arrays and coupled thereto at the respective feed points at the other end thereof, one feed line of each pair having a different phase delay than the other feed line of the same pair.
Claim 3
Dependent Claim
15 words
A doppler navigation antenna according to claim 1, wherein said feed lines comprise coaxial conductors.
Claim 4
Dependent Claim
15 words
A doppler navigation antenna according to claim 1, wherein said feed lines comprise strip conductors.
Claim 5
Dependent Claim
19 words
A doppler navigation antenna according to claim 1, wherein said radiator group comprises hollow wave guide slot radiating arrays.
Claim 6
Dependent Claim
16 words
A doppler navigation antenna according to claim 1, wherein said radiator group comprises dipole radiating arrays.
Claim 7
Dependent Claim
18 words
A doppler navigation antenna according to claim 1, wherein said radiator group comprises periodically curved line radiating arrays.
Claim 8
Dependent Claim
16 words
A doppler navigation antenna according to claim 1, wherein said radiator group comprises slot radiating arrays.
Claim 9
Dependent Claim
18 words
A doppler navigation antenna according to claim 1, wherein each pair of feed lines comprises hollow wave guides.
Claim 10
Dependent Claim
24 words
A doppler navigation antenna according to claim 8, wherein the individual wave guides of each pair of said feed lines have different cross-sectional dimensions.
Claim 11
Dependent Claim
24 words
A doppler navigation antenna according to claim 8, wherein the individual wave guides of each pair of said feed lines have different dielectric characteristics.
Claim 12
Dependent Claim
45 words
A doppler navigation antenna according to claim 8, wherein the radiating arrays comprise hollow wave guides of rectangular cross-section and the wave guides of each pair of feed lines are coupled to said radiating arrays on opposite side walls of said radiating hollow wave guides.
Claim 13
Dependent Claim
37 words
A doppler navigation antenna according to claim 8, wherein each of said radiating arrays comprise hollow chambers at their ends, and said wave guides of said feed lines are coupled to said radiating arrays within said chambers.
Claim 14
Dependent Claim
43 words
A doppler navigation antenna according to claim 8, wherein each radiating array comprises a hollow wave guide having fork-shaped ends, and each of said hollow wave guide feed lines is coupled to each said radiating arrays within respective branches of the fork-shaped ends.
Claim 15
Dependent Claim
59 words
A doppler navigation antenna according to claim 8, wherein each feed line pair is formed of a single hollow wave guide of rectangular cross-section adapted to guide two polarized waves perpendicular with respect to one another to effect different time delays of the two wave structures in accordance with the side walls relationships of the hollow wave guide cross-section.
Claim 16
Dependent Claim
64 words
A doppler navigation antenna according to claim 14, comprising a pair of coaxial lines each having an inner conductor and an outer conductor, said outer conductors connecting adjacent side walls of said single hollow wave guide to oppositely disposed walls of a radiating array hollow wave guide, and said inner conductors following the same paths and extending into the radiating array hollow wave guides.
References Cited (Backward Citations)
US3281851A
Cited
US3508275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-19 | 1986-01-18 | 1986-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-19 | 1990-01-18 | 1990-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-19 | 1994-01-18 | 1994-07-20 | $7700.00 | Window Closed / Lapsed |