CN2370427Y - Wave beam modulator - Google Patents
Wave beam modulator Download PDFInfo
- Publication number
- CN2370427Y CN2370427Y CN 99227317 CN99227317U CN2370427Y CN 2370427 Y CN2370427 Y CN 2370427Y CN 99227317 CN99227317 CN 99227317 CN 99227317 U CN99227317 U CN 99227317U CN 2370427 Y CN2370427 Y CN 2370427Y
- Authority
- CN
- China
- Prior art keywords
- wedge
- wave beam
- optical wedge
- beam modulator
- feed
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- 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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- Aerials With Secondary Devices (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The utility model relates to a wave beam modulator, which is arranged on a tracking radar and is characterized in that the wave beam modulator is composed of an optical wedge and a rotary mechanism. The rotary shaft line of the optical wedge, the symmetrical shaft line of a parabolic reflector and the shaft line of an antenna feed source coincide. The rotary shaft point of one side of the inclined plane of the optical wedge is provided with a dielectric rod, and the dielectric rod is connected with a mechanical driving device to form the rotary mechanism. The optical wedge are rotated round the center of the optical wedge at a certain angular frequency. The utility model changes the work mode that scan is carried through by utilizing a circular slanting horn and a rotary joint and can avoid the difficulties in the design and the processing in the circular slanting horn and the rotary joint in a radar, and overcomes the defect of higher cost.
Description
The utility model relates to a kind of parts of tracking radar, the wave beam modulator in particularly a kind of conical scanning system radar.
Tracking radar is divided into monopulse and two kinds of systems of conical scanning.Conical scanning system radar is fairly simple because of designing, and its high-frequency circuit and receiver are much also simple, so remarkable advantages is arranged when the not high flyer of satellite constant angular velocity is followed the tracks of.Existing conical scanning system radar generally adopts the askew loudspeaker of circle as the rotation feed.In the prior art, justifying askew loudspeaker must make with electroforming process; The askew loudspeaker of circle rear end also must connect a rotary joint that rotates continuously around the paraboloid axis.The technology of electroforming askew loudspeaker of circle and processing rotary joint all compares difficulty, and required expense is also higher.Simultaneously in order when rotating continuously, on any angle, to obtain constant output, requiring rotary joint must be axisymmetric around the field distribution and the transmission medium of turning axle, will make the radio-frequency leakage level reduce to unlikely interference receiver equipment when the design rotary joint or causes the voltage breakdown of mechanical part.For satisfying this requirement, make design and processing difficulty more.
The utility model will provide a kind of brand-new technology scheme, when satisfying the conical scanning radar job requirement, can avoid justifying in the radar difficulty in askew loudspeaker and rotary joint design and the processing, and overcome the higher defective of its expense.
For achieving the above object, inventive point of the present utility model is; Change the working method of utilizing askew loudspeaker of circle and rotary joint to scan in the prior art, change into and utilize transmission medium that the transmission mode of refraction of electromagnetic wave deflection is realized the conical scan of antenna beam in the space.Concrete scheme is: add a wave beam modulator in feed the place ahead, the wave beam modulator is made up of a wedge and rotating mechanism thereof.The rotation of wedge overlaps with the axis three of the axis of symmetry of paraboloid and antenna feed.The area of wedge is not less than the mouth area of feed, and for example: when wedge was a right cylinder, its diameter was more than or equal to the bore of feed; When the xsect of wedge was rectangle, its minor face length was not less than the bore of feed.The one side that wedge is aimed at feed can be described as the plane, and another side is the inclined-plane.The plane of wedge and the actinal surface of feed preferably be arranged in parallel (when the plane of wedge and feed actinal surface are not parallel, needing correct its error) by receiver.The inclined-plane of wedge is towards parabola antenna or bi-curved reflector.Turning axle place on one side, wedge inclined-plane is equipped with dielectric rod, and this dielectric rod and mechanical actuation device connect, and forms rotating mechanism.Center on its turning axle when drive unit drives wedge, when rotating with certain angular frequency, the electromagnetic wave that antenna feed is sent is partial to the thicker one side of wedge after the wedge refraction, and realizes the conical scan of antenna beam along with the rotation of wedge.The drift angle of wedge should be less, and wedge and antenna feed should be as close as possible during installation.
Utilizing transmission medium that the transmission mode of electromagnetic refractive deflection is realized the conical scan of antenna beam in the space, is a kind of brand-new technology scheme, and it has changed the working method of utilizing askew loudspeaker of circle and rotary joint to scan in the prior art.New departure can be avoided justifying in the radar difficulty in askew loudspeaker and rotary joint design and the processing, and overcome the higher defective of its expense when satisfying the conical scanning radar job requirement.
Now be described further with accompanying drawing in conjunction with the embodiments.
Fig. 1 is the composition synoptic diagram of lens electromagnetic horn and wedge;
Fig. 2 is embodiment 1 structural representation;
Fig. 3 is for implementing 2 structural representations.
Embodiment 1, and with reference to Fig. 1, Fig. 2: antenna is main burnt feedforward paraboloid 1, places the parabola antenna focus as the lens loudspeaker 2 of feed, and wedge 3 is made by teflon, is thin right cylinder, places lens loudspeaker front and close as far as possible.The turning axle of wedge overlaps with the axis of symmetry of paraboloid 1 and the axis three of lens antenna feed 2.The inclined-plane of wedge is towards paraboloid.In the center, inclined-plane of wedge long dielectric rod is installed, this dielectric rod is rotated around preceding bobbin thread by motor-driven.The drift angle of wedge is by the angle of deviation and the dielectric constant decision of wedge; The angle of deviation of wedge is by the phase center of feed and defocus distance decision partially; Defocus distance is by the angle of the crossing of conical scan antenna and the degree of depth decision that intersects partially.The electromagnetic wave that antenna feed is sent incides the wedge plane of incidence, because
, the outgoing wave beam after the wedge refraction always is folded to the thick one side of wedge.When the driven by motor dielectric rod rotates, make wedge with a certain angular frequency when antenna axis rotates, the angle of deviation of wedge is rotation synchronously with it also, realizes the conical scan of antenna lobe in the space.
Claims (3)
1, a kind of wave beam modulator is arranged on the tracking radar, it is characterized in that: the wave beam modulator is made up of wedge and rotating mechanism thereof, and the rotation of wedge overlaps with the axis three of the axis of symmetry of paraboloid and antenna feed.
2, according to the described wave beam modulator of claim 1, it is characterized in that; One side, inclined-plane at the wedge rotation center is equipped with dielectric rod, and this joint matter bar and mechanical actuation device connect, and form rotating mechanism.
3, according to claim 1 or 2 described wave beam modulators, it is characterized in that: the planar alignment feed of wedge, and be arranged in parallel with the actinal surface of feed, the inclined-plane of wedge is towards parabola antenna or bi-curved reflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99227317 CN2370427Y (en) | 1999-02-12 | 1999-02-12 | Wave beam modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99227317 CN2370427Y (en) | 1999-02-12 | 1999-02-12 | Wave beam modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2370427Y true CN2370427Y (en) | 2000-03-22 |
Family
ID=34016849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99227317 Expired - Fee Related CN2370427Y (en) | 1999-02-12 | 1999-02-12 | Wave beam modulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2370427Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062942A (en) * | 2010-12-15 | 2011-05-18 | 同济大学 | Deflecting optical wedge scanning device |
| CN103259100A (en) * | 2012-02-17 | 2013-08-21 | 重庆金美通信有限责任公司 | Parabolic antenna allowing beamwidth and gain to be continuously variable |
| WO2021171157A1 (en) * | 2020-02-25 | 2021-09-02 | Isotropic Systems Ltd | Prism for repointing reflector antenna main beam |
-
1999
- 1999-02-12 CN CN 99227317 patent/CN2370427Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062942A (en) * | 2010-12-15 | 2011-05-18 | 同济大学 | Deflecting optical wedge scanning device |
| CN102062942B (en) * | 2010-12-15 | 2012-02-29 | 同济大学 | Deflecting optical wedge scanning device |
| CN103259100A (en) * | 2012-02-17 | 2013-08-21 | 重庆金美通信有限责任公司 | Parabolic antenna allowing beamwidth and gain to be continuously variable |
| WO2021171157A1 (en) * | 2020-02-25 | 2021-09-02 | Isotropic Systems Ltd | Prism for repointing reflector antenna main beam |
| US11469515B2 (en) | 2020-02-25 | 2022-10-11 | Isotropic Systems Ltd. | Prism for repointing reflector antenna main beam |
| US11888228B2 (en) | 2020-02-25 | 2024-01-30 | All.Space Networks Limited | Prism for repointing reflector antenna main beam |
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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 |