US4003055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar function testing apparatus
Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1975-10-20
•
Granted: 1977-01-11
•
Expires: 1995-10-20
Abstract
Abstract A radar function testing apparatus for simulating a real radar target includes a transmission path between the movable and the fixed portion of the radar antenna in a radar equipment. A radiation energy source in the form of a light emitting element is mounted on, for example, the movable part and a radiation receiver in the form of a light sensitive element is mounted, for example on the stationary part. The light sensitive element consists of a photo detector which in dependence on the direction of the impinging radiation beam emits a number of signals which in known manner are treated so as to create signals which imitate the signals which would be obtained from a real target.
Inventors
- 👤 Nils Tage Eriksson
- 👤 Rune William Jacobsson
- 👤 Ingvar Georg Sundstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:33
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40; G01S7/4004; G01S7/4021
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
70 words
Apparatus for testing different functions in a radar equipment comprising: n antenna unit having a movable part and a fixed part; a receiver unit for said antenna unit; a source of radiation energy and a radiation receiver; means for providing a directed transmission of radiation energy between said parts of the antenna unit in dependence on the position of said movable part relative to the position of said fixed part;
Claim 2
Dependent Claim
70 words
Apparatus for testing different functions in a radar equipment comprising: n antenna unit having a movable part and a fixed part; a receiver unit for said antenna unit; a source of radiation energy and a radiation receiver; means for providing a directed transmission of radiation energy between said parts of the antenna unit in dependence on the position of said movable part relative to the position of said fixed part;
Claim 3
Dependent Claim
97 words
means included in said radiation receiver for generating three different signals in dependence on the deviation of the direction of the radiant energy from a fictitious target direction corresponding to a certain target position, said signals consisting of a first signal whose amplitude varies with the received energy, a second signal which varies with the position of the radiation beam center relative to a symmetry axis, and a third signal which varies with the position of the beam center relative to another symmetry axis perpendicular to said symmetry axis; a signal source for generating pulsed signals; and
Claim 4
Dependent Claim
97 words
means included in said radiation receiver for generating three different signals in dependence on the deviation of the direction of the radiant energy from a fictitious target direction corresponding to a certain target position, said signals consisting of a first signal whose amplitude varies with the received energy, a second signal which varies with the position of the radiation beam center relative to a symmetry axis, and a third signal which varies with the position of the beam center relative to another symmetry axis perpendicular to said symmetry axis; a signal source for generating pulsed signals; and
Claim 5
Dependent Claim
44 words
attenuating means controlled by said first, second and third signals, for generating from said pulsed signals three different output signals which are fed to said receiver unit, said output signals corresponding to the target signals which would be obtained from a real radar target.
Claim 6
Dependent Claim
44 words
attenuating means controlled by said first, second and third signals, for generating from said pulsed signals three different output signals which are fed to said receiver unit, said output signals corresponding to the target signals which would be obtained from a real radar target.
Claim 7
Dependent Claim
36 words
Apparatus according to claim 1, wherein said source of radiation energy is arranged on the movable part of the antenna unit and wherein said radiation receiver is arranged on the fixed part of said antenna unit.
Claim 8
Dependent Claim
32 words
Apparatus according to claim 1, wherein said source of radiation energy is arranged on the fixed part of the antenna unit and wherein said radiation receiver is arranged on the movable part.
Claim 9
Dependent Claim
38 words
Apparatus according to claim 1, wherein both said source of radiation energy and said radiation receiver are arranged on the fixed part of the antenna unit and wherein a radiation reflecting element is arranged on the movable part.
Claim 10
Dependent Claim
51 words
Apparatus according to claim 1, wherein said signal source emits pulsed signals in the intermediate frequency range and is connected to the control input of each of said attenuation means, each output of said attenuation means being connected to the respective input of the intermediate frequency unit in the receiver unit.
Claim 11
Dependent Claim
28 words
Apparatus according to claim 1, wherein said signal source emits signals within the microwave range, said attenuation means being connected to a signal mixer in the receiver unit.
Claim 12
Dependent Claim
20 words
Apparatus according to claim 1 wherein the plane formed by said two symmetry axes is normal to the fictitious direction.
References Cited (Backward Citations)
US3158861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |