CN2334123Y - Conical scanning arrangement - Google Patents
Conical scanning arrangement Download PDFInfo
- Publication number
- CN2334123Y CN2334123Y CN 98227931 CN98227931U CN2334123Y CN 2334123 Y CN2334123 Y CN 2334123Y CN 98227931 CN98227931 CN 98227931 CN 98227931 U CN98227931 U CN 98227931U CN 2334123 Y CN2334123 Y CN 2334123Y
- Authority
- CN
- China
- Prior art keywords
- antenna
- conical scanning
- feed
- camcylinder
- axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a conical scanning device on a radar antenna, which is provided with an antenna reflector and a feed source. The utility model is characterized in that the feed source has a horn structure that the utility model is provided with a circular cylinder in which an eccentric cylinder is processed, and the shaft line of the eccentric cylinder offsets a certain distance with the shaft line of the circular cylinder; a feed source horn and a high-frequency head are fixed in the eccentric cylinder after connected into a whole, and the caliber surface of the horn faces a paraboloid reflector or a hyperboloid reflector, and is connected with a rotary mechanism. The utility model can replace a circular inclined horn to be used as the feed source to realize the conical scanning of an antenna beam in space, and overcomes the defects of difficult manufacture for the circular inclined horn, high manufacture cost, etc.
Description
The utility model relates to the conical scanning device of a kind of parts of radar antenna, particularly a kind of antenna.
Along with the continuous development of modern satellite communication and satellite video, the ground motion body becomes a main developing direction of Radar Technology to the tracking technique of artificial satellite.The mode that radar angle tracking technology is obtained angle error has two kinds of basic systems; Be conical scanning and pulse.Lobe system when monopulse system belongs to complicated, its speed of extracting angle error is very fast; But the whole system more complicated needs three receive channels, No. three receivers.Better simply relatively conical scanning is sequence wave valve system aiming angle measurement.During angle tracking, the needle-like beam axis of antenna carries out around guidance axis, and the conical scanning in spatial domain is listed as the angular error signal that letter becomes amplitude modulation to echo impulse, after the normalization of single channel receiver and detecting, in the discriminator of angle, decomposite lateral angle and angle of pitch two-way error controling signal.For the very high target of aircraft constant angular velocity, this system follows the tracks of the not high target of satellite constant angular velocity, and wide prospect is arranged.Existing conical scanning system radar generally adopts the askew loudspeaker of circle to make the rotation feed, and the processing and manufacturing of the askew loudspeaker of circle is very difficult, has only the electroforming process of employing just can finish, and manufacturing expense is higher, and this has caused obstacle to applying of conical scanning system radar.
The purpose of this utility model is to overcome this obstacle of the prior art, a kind of radar conical scanning device of new construction is provided, it can replace the askew loudspeaker of circle as feed, and make a skew is arranged between feed and antenna axis, when this conical scanning device rotates around antenna axis, can realize the conical scanning of antenna beam in the space.
To achieve these goals, inventive point of the present utility model is: change the mode of carrying out conical scanning in the prior art with the askew loudspeaker of circle, adopt a conical scanning device, fix feed, realize conical scan.Concrete scheme is that a cylinder is set, in this cone, process a camcylinder, the axis of this camcylinder with cylindrical parallel axes and be offset certain distance, Feed Horn be connected with tuner in aggregates after, be fixed in the camcylinder, the horn mouth diametric plane is towards paraboloidal reflector or bi-curved reflector, and connects with rotating mechanism.For easy to assembly, the diameter of camcylinder can equate that length is less than or equal to the length of feed and tuner with the overall diameter of feed.
The utility model provides a kind of radar conical scanning device of new construction, it has overcome the askew loudspeaker processing and manufacturing difficulty of circle in the prior art, the more high disadvantage of manufacturing expense, can replace the askew loudspeaker of circle as feed, and make a skew is arranged between feed and antenna axis, when this conical scanning device rotates around antenna axis, can realize the conical scanning of antenna beam in the space.
Now be described further with embodiment in conjunction with the accompanying drawings.
Fig. 1 is embodiment 1 structural representation;
Fig. 2 is the fixing schematic diagram of horn feed, tuner and rotary joint in the example 1;
Fig. 3 is the structural representation of this device on main burnt parabolic antenna;
Fig. 4 is the structural representation of this device on the Cassegrain dual reflector antenna.
Embodiment 1, and with reference to Fig. 1, Fig. 2, Fig. 3: near the focus of the paraboloidal reflector 1 of main burnt front feed antenna, conical scanning device 2 is installed, the axis of cylinder 3 overlaps with the axis of symmetry of paraboloidal reflector in this device.Cylindrical loudspeaker place end face is towards paraboloidal reflector.The axis of camcylinder 4 and cylindrical journal offset certain distance, this distance is by the intersection degree of depth and the crossing angle decision of conical scan antenna.The antenna feed loudspeaker are fixed in the camcylinder of conical scanning device, become to closely cooperate with cylinder.Tuner 5 is fixed in the camcylinder by a known clamp structure and is connected with Feed Horn 6.The output cable of tuner is connected with a coaxial rotary joint 7.The phase center of antenna feed is positioned on the focal plane of parabolic antenna.The composition of conical scanning device rotating mechanism is, motor and transmission device are fixed on the antenna bracing frame, and coaxial rotary joint 7 also is fixed on the bracing frame.Rotary joint adopts prior art, and when mechanism rotated, this joint made the electrical connection of whole device keep normal.When electrical power rotates, drive the conical scanning device with the rotation of certain frequency rule by transmission devices such as gear, bearings, because the skew of two axial lines, the phase center of antenna feed is not to be positioned on the focus of antenna, but a cross deflection coke is arranged, so the secondary pattern of parabolic antenna no longer with the antenna axis symmetry.The maximum of antenna lobe departs from angle of antenna axis, and along with the space that is rotated in of feed forms conical scan.
Claims (6)
1, a kind of conical scanning device, be provided with antenna reflector and feed, it is characterized in that: the Feed Horn structure is, a cylinder is set, in this cylinder, processes a camcylinder, the axis of this camcylinder and the distance certain with cylindrical journal offset, after Feed Horn, tuner and rotary joint connection are in aggregates, be fixed in the camcylinder, the horn mouth diametric plane is towards paraboloidal reflector or bi-curved reflector, and connects with rotating mechanism.
2, according to the described conical scanning device of claim 1, it is characterized in that: the diameter of camcylinder equates that with the overall diameter of feed length is less than or equal to the length of feed and tuner,
3, according to claim 1 or 2 described conical scanning devices, it is characterized in that: cylindrical axis overlaps with the axis of symmetry of paraboloidal reflector.
4, according to claim 1 or 2 described conical scanning devices, it is characterized in that: the distance that axis and cylindrical axis were offset of camcylinder, by the intersection degree of depth and the crossing angle decision of conical scan antenna.
5, according to claim 1 or 2 described conical scanning devices, it is characterized in that: the phase center of antenna feed is positioned on the focal plane of parabolic antenna.
6, according to claim 1 or 2 described conical scanning devices, it is characterized in that: the composition of the rotating mechanism of conical scanning device is, motor and transmission device are fixed on the antenna bracing frame, and coaxial rotary joint also is fixed on the bracing frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98227931 CN2334123Y (en) | 1998-09-25 | 1998-09-25 | Conical scanning arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98227931 CN2334123Y (en) | 1998-09-25 | 1998-09-25 | Conical scanning arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2334123Y true CN2334123Y (en) | 1999-08-18 |
Family
ID=33978152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98227931 Expired - Fee Related CN2334123Y (en) | 1998-09-25 | 1998-09-25 | Conical scanning arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2334123Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7414761B2 (en) | 2002-05-30 | 2008-08-19 | Canon Kabushiki Kaisha | Imaging optical system and image reading apparatus |
-
1998
- 1998-09-25 CN CN 98227931 patent/CN2334123Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7414761B2 (en) | 2002-05-30 | 2008-08-19 | Canon Kabushiki Kaisha | Imaging optical system and image reading apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |