CN111211403B - Fixed feed source steering reflector antenna - Google Patents
Fixed feed source steering reflector antenna Download PDFInfo
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- CN111211403B CN111211403B CN202010186684.4A CN202010186684A CN111211403B CN 111211403 B CN111211403 B CN 111211403B CN 202010186684 A CN202010186684 A CN 202010186684A CN 111211403 B CN111211403 B CN 111211403B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/288—Satellite antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
- H01Q19/19—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/12—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems
- H01Q3/16—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device
- H01Q3/20—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device wherein the primary active element is fixed and the reflecting device is movable
Abstract
A fixed feed-steering reflector antenna comprising: the device comprises a connecting piece, a feed source, a secondary reflector and a main reflector; the main reflector is provided with a first driving piece for driving the main reflector to rotate around a first direction, the secondary reflector is provided with a second driving piece for driving the secondary reflector to rotate around a second direction, two ends of the connecting piece are respectively connected and fixed with the body of the first driving piece and a rotating shaft of the second driving piece, the connecting piece is used for driving the main reflector to synchronously revolve along the second direction while the secondary reflector rotates, and the first direction is vertical to the second direction; the feed source is fixed in the direction of the rotation axis of the secondary reflector, the phase center of the feed source is related to the focus of the main reflector or the focus of the secondary reflector, and the beam center line of the feed source is vertical to the beam center line of the emergent beam reflected by the secondary reflector. The invention does not need devices such as a microwave rotary joint and the like, thereby reducing the weight of the antenna and the loss of a feeder line; the antenna gain does not change along with the pointing adjustment, reduces the electromagnetic wave beam loss of the antenna, and covers the whole ground space.
Description
Technical Field
The invention belongs to the field of satellite antennas, and particularly relates to a fixed feed source steering reflector antenna.
Background
The satellite communicates with the ground station through the antenna, and when the satellite flies, the satellite is in a motion state relative to the ground station.
The traditional directional adjustable reflector antenna consists of an antenna and a two-dimensional directional mechanism, and the adjustment of the beam direction of the antenna is realized by controlling the rotation angles of two rotating shafts of the directional mechanism (X-Y type or pitching direction type, etc.). The method is generally that a reflecting surface antenna (including a feed network) is integrally installed on a two-dimensional pointing mechanism, a microwave rotary joint is needed to be configured in the feed network of the antenna to realize the connection between a rotating part and a fixed part, and one rotary joint is needed to be configured on one rotary shaft. In addition, a turning waveguide is required to be configured to adapt to the structural trend of two rotating shafts of the two-dimensional pointing mechanism. However, due to the fact that the rotary joint and the turning waveguide are added to the antenna, loss and weight of the antenna can be increased, rocket fuel needs to be added, and rocket design difficulty is improved; further, the loss increase of the antenna becomes more significant as the electromagnetic signal beam frequency becomes higher.
Disclosure of Invention
The invention aims to provide a fixed feed source steering reflector antenna to realize light weight, large pointing range and low electromagnetic signal loss of the antenna.
In order to realize the technical effects, the technical scheme of the invention is as follows:
a fixed feed-steering reflector antenna, comprising: the antenna comprises a connecting piece, a feed source, a secondary reflector and a main reflector which are sequentially arranged along the direction of the antenna to the ground beam;
the main reflector is provided with a first driving piece for driving the main reflector to rotate around a first direction, the secondary reflector is provided with a second driving piece for driving the secondary reflector to rotate around a second direction, two ends of the connecting piece are respectively connected and fixed with the body of the first driving piece and a rotating shaft of the second driving piece, the connecting piece is used for driving the main reflector to synchronously revolve along the second direction while the secondary reflector rotates, and the first direction is vertical to the second direction;
the feed source is fixed in the direction of the rotation axis of the secondary reflector, the beam center line of the feed source is perpendicular to the beam center line of the emergent beam reflected by the secondary reflector, the focus of the main reflector is overlapped with the phase center of the feed source after being mirrored by the secondary reflector, or the focus of the main reflector and the phase center of the feed source are respectively positioned on different corresponding focuses of the secondary reflector.
The main reflector is an offset parabolic antenna, the focus of the main reflector is located on the rotation axis of the main reflector, the included angle between the incident beam center line and the emergent beam center line of the main reflector is the offset angle of the main reflector, and the offset angle is at least half of the coverage angle pointed by the antenna to the ground beam.
The secondary reflector is a plane mirror, and the position of a mirror image focus of the main reflector reflected by the plane mirror is the phase center of the feed source.
The secondary reflector is an ellipsoidal mirror, the first focus position of the ellipsoidal mirror is coincident with the focus position of the main reflector, and the second focus of the ellipsoidal mirror is the phase center of the feed source.
The rotation axis of the main reflector is an angular bisector of an angle formed by the focal point of the main reflector and a connecting line of two end points with the maximum relative height difference of the main reflector.
Wherein, first driving piece includes: the first motor is connected with one end of the connecting piece, the first motor is in driving connection with one end of the main anti-rotation shaft, the other end of the main anti-rotation shaft is fixedly connected with the main reflector, and the first motor drives the main anti-rotation shaft and drives the main reflector to rotate in a first direction;
the second drive member includes: the second motor and the main and auxiliary reverse co-rotation rotating shafts are connected, the main and auxiliary reverse co-rotation rotating shafts are connected with the other end of the connecting piece, the second motor is in driving connection with one end of the main and auxiliary reverse co-rotation rotating shafts, the other end of the main and auxiliary reverse co-rotation rotating shafts is fixedly connected with the auxiliary reflector, and the second motor drives the main and auxiliary reverse co-rotation rotating shafts and drives the auxiliary reflector to rotate in the second direction and drive the main reflector to revolve in the second direction.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
1) the invention realizes the adjustment of the antenna electromagnetic wave beam direction through the rotation of two dimensions of the main anti-rotation rotating shaft and the main and auxiliary anti-rotation rotating shafts, thereby fixing the feed source without devices such as a microwave rotating joint and the like, and further reducing the weight of the antenna and the loss of a feed line;
2) the invention ensures that the gain of the antenna does not change along with the direction adjustment by the rotation of two dimensions under the condition of fixed feed source, reduces the loss of the electromagnetic wave beam of the antenna and realizes the directional ground full-space coverage of the electromagnetic wave beam of the antenna.
Drawings
FIG. 1 is a schematic structural view of a fixed feed source turning reflector antenna of the present invention;
FIG. 2 is a schematic diagram of the geometric principles of a fixed feed-source turning reflector antenna of the present invention;
FIG. 3 is a schematic diagram of the geometric principles of a fixed feed-source turning reflector antenna of the present invention;
FIG. 4 is a schematic view of the rotation of a fixed feed turning reflector antenna of the present invention;
fig. 5 is an E-plane H-plane radiation pattern for a fixed feed-steering reflector antenna of the present invention.
Description of the reference numerals
1: a main reflector; 2: a connecting member; 3: a main anti-rotation shaft; 4: a sub-reflector; 5: the main and auxiliary counter co-rotating shafts; 6: a feed source; 7: a first motor; 8: a second motor.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
The fixed feed steering reflector antenna provided by the invention is further described in detail by combining the figures and the specific embodiment. Advantages and features of the present invention will become apparent from the following description and from the claims.
Referring to fig. 1 and 4, the present embodiment provides a fixed-feed turning reflector antenna, including: the antenna comprises a connecting piece 2, a feed source 6, an auxiliary reflector 4 and a main reflector 1 which are sequentially arranged along the direction of the antenna to ground wave beam;
the main reflector 1 is provided with a first driving piece for driving the main reflector 1 to rotate around a first direction, the secondary reflector 4 is provided with a second driving piece for driving the secondary reflector 4 to rotate around a second direction, two ends of the connecting piece 2 are respectively connected and fixed with a body of the first driving piece and a rotating shaft of the second driving piece, the main reflector 1 is driven to synchronously revolve around the second direction while the secondary reflector 4 rotates, and the first direction is vertical to the second direction;
the feed source 6 is fixed on the direction of the rotation axis of the secondary reflector 4, the beam center line of the feed source 6 is perpendicular to the beam center line of the emergent beam reflected by the secondary reflector 4, the focus of the primary reflector 1 is overlapped with the phase center of the feed source 6 after being mirrored by the secondary reflector 4, or the focus of the primary reflector 1 and the phase center of the feed source 6 are respectively positioned on different corresponding focuses of the secondary reflector 4.
Referring to fig. 4, in particular, the first driving member includes: the device comprises a first motor 7 and a main anti-rotation rotating shaft 3, wherein the first motor 7 is connected with one end of a connecting piece 2, the first motor 7 is in driving connection with one end of the main anti-rotation rotating shaft 3, the other end of the main anti-rotation rotating shaft 3 is fixedly connected with a main reflector 1, and the first motor 7 drives the main anti-rotation rotating shaft 3 and drives the main reflector 1 to rotate in a first direction;
the second drive member includes: the second motor 8 and the main and auxiliary reverse co-rotation rotating shafts 5, the main and auxiliary reverse co-rotation rotating shafts 5 are connected with the other end of the connecting piece 2, the second motor 8 is in driving connection with one end of the main and auxiliary reverse co-rotation rotating shafts 5, the other end of the main and auxiliary reverse co-rotation rotating shafts 5 is fixedly connected with the auxiliary reflector 4, and the second motor 8 drives the main and auxiliary reverse co-rotation rotating shafts 5 and drives the auxiliary reflector 4 to rotate in the second direction and drive the main reflector 1 to revolve in the second direction.
This implementation will now be described in detail:
referring to fig. 1, in the present embodiment, the method includes: the device comprises a connecting piece 2, a feed source 6, a secondary reflector 4, a main reflector 1, a first driving piece and a second driving piece.
The embodiment is a fixed feed source steering reflector antenna applied to a V frequency band, and the requirement of the antenna on the ground electromagnetic wave beam pointing coverage angle is as follows: the angle in the north-south direction is more than or equal to +/-72 degrees and the angle in the east-west direction is more than or equal to +/-60 degrees relative to the normal direction of the satellite to the ground.
In the embodiment, the connecting piece 2 is a connecting rod, and the first driving piece and the second driving piece are both fixed on the connecting rod, wherein the first driving piece is a first motor 7 and a main anti-rotation rotating shaft 3; the second driving piece is a second motor 8 and a main-auxiliary reverse co-rotating shaft 5;
then, one end of the connecting rod is connected with a first motor 7, the first motor 7 is connected with one end of the main anti-rotation rotating shaft 3, the other end of the main anti-rotation rotating shaft 3 is connected with the main reflector 1, and the first motor 7 drives the main anti-rotation rotating shaft 3 to rotate around a first direction, so that the main reflector 1 is driven to rotate around the rotation axis of the main reflector 1;
meanwhile, the other end of the connecting rod is vertically connected with the primary and secondary counter-rotation rotating shaft 5, one end of the primary and secondary counter-rotation rotating shaft 5 is connected with the second motor 8, the other end of the primary and secondary counter-rotation rotating shaft is connected with the secondary reflector 4, the second motor 8 drives the primary and secondary counter-rotation rotating shaft 5 to rotate around the second direction, so that the secondary reflector 4 is driven to rotate around the second direction, and the primary and secondary counter-rotation rotating shaft 5 rotates to drive the primary reflector 1 to synchronously revolve along the second direction due to the fact that the primary and secondary counter-rotation rotating shaft 5 is vertically connected with one end of the connecting rod;
referring to fig. 5, fig. 5 shows an E plane radiation pattern and an H plane radiation pattern of the antenna in practical application of the present embodiment;
the feed source 6 is fixed on an external satellite body and is positioned in the direction of the rotation axis of the secondary reflector 4, the beam center line of the feed source 6 is vertical to the beam center line of the emergent beam reflected by the secondary reflector 4, namely the incident beam center line of the secondary reflector 4 is vertical to the emergent beam center line thereof; the position condition of the feed source 6 is that the phase center of the feed source is coincident with the focus of the main reflector 1 after being mirrored by the sub-reflector 4, or the phase center of the feed source and the focus of the main reflector 1 are respectively positioned on different focuses of the sub-reflector 4.
When the antenna works, the feed source 6 is fixed, and the adjustment of the antenna beam direction is realized through the rotation of two dimensions of the main anti-rotation rotating shaft 3 and the main anti-rotation rotating shaft 5; the antenna beam pointing can be realized to cover the whole space of the ground, and the antenna gain is not influenced by pointing adjustment.
Referring to fig. 1 and 4, in particular, the main reflector 1 is an offset parabolic antenna, the focal point of the main reflector 1 is located on the rotation axis of the main reflector 1, the included angle between the incident beam center line and the emergent beam center line of the main reflector 1 is the offset angle of the main reflector 1, and the offset angle is at least half of the coverage angle of the antenna to the ground beam pointing direction.
Referring to fig. 2 or fig. 3, in the present embodiment, the main reflector 1 is an offset parabolic antenna, and in fig. 2 or fig. 3, the main reflector 1 and the sub-reflector 4 are mapped on the same plane, and the center line of the main anti-rotation axis 3 and the center line of the main anti-rotation axis 5 are both located on the plane; then, OZ and OY are coordinate systems in which the planes are perpendicular to each other, where OY is an axis of a paraboloid of the main reflector 1, an arc line formed by AB in the drawing is the main reflector 1, and point a in the drawing is an upper vertex of the main reflector 1, and point B is a lower vertex of the main reflector 1; the contact point between the central line of the main anti-rotation rotating shaft 3 and the main reflector 1 is O1I.e. the main reflector 1 around the point O1Rotates to contact with the sub-reflector 4 at a point O2(ii) a In addition, the axis OY of the paraboloid of the main reflector 1 is intersected with the central line of the main anti-rotation rotating shaft 3 at a point F, the point is the focus of the main reflector 1, and the included angle formed by the point F and the central line of the main anti-rotation rotating shaft is equal to O1FO is equal to offset angle FO of main reflector 11O3Wherein the above-mentioned FO1Is the incident beam center line of the main reflector 1, the above-mentioned O1O3Is the central line of the outgoing beam of the main reflector 1; because the value of the offset angle is not less than half of the coverage angle required by the pointing direction, if the coverage requirements of the two-dimensional pointing angle are different, the two-dimensional pointing angle is calculated according to a smaller one-dimensional value. When the main anti-rotation rotating shaft 3 or the main and auxiliary anti-rotation rotating shafts 5The above-mentioned geometrical relationship remains unchanged during rotation.
Specifically, the secondary reflector 4 is a plane mirror, and the position of a mirror image focal point of the primary reflector 1 reflected by the plane mirror is the phase center of the feed source 6.
Referring to FIG. 2, in this embodiment, the secondary reflector 4 is a flat mirror, i.e., O2The line segment represents the secondary reflector 4, wherein point O2Also located on the centre line of the primary and secondary counter-rotating axes 5, the secondary reflector 4 being about point O2The main anti-rotation shaft 3 is driven to rotate; the focal point F of the main reflector 1 is under the mirror image effect of the sub-reflector 4, F1Is a mirror image of the focal point F, which can be understood as F1Is the equivalent focus of F, at mirror focus F1The feed source 6 is arranged so that the phase center point of the feed source 6 is at the mirror focus F1The feed source 6 is fixedly connected with an external satellite and keeps still under the working state; viewed from the direction of the beam emitted by the feed 6 according to the antenna, F1O2Is the central line of the incident beam of the secondary reflector 4 and is collinear with the axis of the feed source 6; o is2O1Is the central line of the incident beam of the main reflector 1 and is collinear with the central line of the main anti-rotation rotary shaft 3; o is1O3A central line of the emergent beam of the primary reflector 1 is parallel to the axis OY of the paraboloid of the primary reflector 1, wherein the central line F of the incident beam of the secondary reflector 41O2With the central axis O of the incident beam of the main reflector 12O1Is vertical, and the central line O of the incident beam of the main reflector 12O1With the centre line O of the outgoing beam of the main reflector 11O3Presenting the angle of 60 degrees; when the main anti-rotation axis 3 or the main and auxiliary anti-rotation axes 5 rotate, the above geometrical relationship remains unchanged.
Specifically, the secondary reflector 4 is an ellipsoidal mirror, a first focal point position of the ellipsoidal mirror coincides with a focal point position of the primary reflector 1, and a second focal point of the ellipsoidal mirror is a phase center of the feed source 6.
Referring to FIG. 3, in this embodiment, the secondary reflector 4 is an ellipsoidal mirror, i.e., O2The line segment of the curve represents the secondary reflector 4, wherein the point O2Also located on the main and auxiliary counter-rotating shafts5, the sub-reflector 4 surrounds the point O2The main anti-rotation shaft 3 is driven to rotate; the focal point F of the main reflector 1 is coincident with the first focal point, F, of the secondary reflector 42Then is the second focal point of the secondary reflector 4, at the second focal point F2A feed source 6 is arranged, and the phase center point of the feed source 6 is positioned at a second focus F2The feed source 6 is also fixedly connected with an external satellite and keeps still under the working state; viewed from the direction of the beam emitted by the feed 6 according to the antenna, F2O2Is the central line of the incident beam of the secondary reflector 4 and is collinear with the axis of the feed source 6; o is2O1Is the central line of the incident beam of the main reflector 1 and is collinear with the central line of the main anti-rotation rotating shaft 3; o is1O3A central line of the emergent beam of the primary reflector 1 is parallel to the axis OY of the paraboloid of the primary reflector 1, wherein the central line F of the incident beam of the secondary reflector 42O2With the central axis O of the incident beam of the main reflector 12O1Is vertical, and the central line O of the incident beam of the main reflector 12O1With the centre line O of the outgoing beam of the main reflector 11O3Presenting the angle of 60 degrees; when the main anti-rotation axis 3 or the main and auxiliary anti-rotation axes 5 rotate, the above geometrical relationship remains unchanged.
Referring to fig. 4, which is a rotation explanatory diagram of the present embodiment, the first motor 7 and the second motor 8 are both rotation axis motors, and specifically, the first motor 7 controls the rotation angle of the main reflector 1; the second motor 8 controls the rotation angle of the sub-reflector 4. When the antenna works, the external satellite controls the main anti-rotation rotating shaft 3 and the main anti-rotation rotating shaft 5 by controlling the first motor 7 and the second motor 8 so as to realize the adjustment of the antenna beam direction. In the antenna in the state of fig. 4, the rotation angle of the main anti-rotation axis 3 is defined as minus 90 degrees, the rotation angle of the main anti-rotation axis 3 increases clockwise when viewed from the incident beam direction of the main reflector 1, and the rotation range of the main anti-rotation axis 3 is minus 90 degrees to plus 90 degrees according to the aforementioned antenna ground electromagnetic beam pointing coverage requirement; in addition, in the antenna in the state of fig. 4, the rotation angle of the main and sub co-rotating shafts 5 is defined as 0 degree, and the rotation angle of the main and sub co-rotating shafts 5 increases in the counterclockwise direction as viewed from the incident beam direction of the sub reflector 4, and also according to the aforementioned antenna ground electromagnetic beam pointing coverage requirement, the rotation range of the main and sub co-rotating shafts 5 is from minus 12 degrees to plus 132 degrees.
Specifically, the rotation axis of the main reflector 1 is an angular bisector of an angle formed by a connecting line between a focal point of the main reflector 1 and two end points of the main reflector 1 with the largest relative height difference.
Referring to fig. 2 or 3, after determining the gain requirement, the aperture of the main reflector 1 is defined and the offset height of the main reflector 1 is determined, the main reflector 1 emitting a beam O1O3The distance between the axis OY of the paraboloid of the main reflector 1 is the offset height of the main reflector 1 in the present embodiment, and the preferred offset height of the main reflector 1 is P, when the above offset height is P, the central line O of the incident beam of the main reflector 12O1Just is an angular bisector of ≤ BFA, namely ≤ O is satisfied1FA＝∠O1FB is the optimum main reflector 1 offset height.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents.
Claims (6)
1. A fixed feed-steering reflector antenna, comprising: the antenna comprises a connecting piece, a feed source, a secondary reflector and a main reflector which are sequentially arranged along the direction of the antenna to the ground beam;
the main reflector is provided with a first driving piece for driving the main reflector to rotate around a first direction, the secondary reflector is provided with a second driving piece for driving the secondary reflector to rotate around a second direction, two ends of the connecting piece are respectively connected and fixed with the body of the first driving piece and a rotating shaft of the second driving piece, the main reflector is driven to synchronously revolve along the second direction while the secondary reflector rotates, and the first direction is vertical to the second direction;
the feed source is fixed in the direction of the rotation axis of the secondary reflector, the beam center line of the feed source is perpendicular to the beam center line of an emergent beam reflected by the secondary reflector, the focus of the main reflector is overlapped with the phase center of the feed source after being mirrored by the secondary reflector, or the focus of the main reflector and the phase center of the feed source are respectively positioned on different corresponding focuses of the secondary reflector.
2. The fixed feed turning reflector antenna of claim 1, wherein the primary reflector is an offset parabolic antenna, the primary reflector has a focal point on an axis of rotation of the primary reflector, and the primary reflector has an incident beam centerline and an emergent beam centerline that form an offset angle of the primary reflector, the offset angle being at least half of a coverage angle at which the antenna is directed toward the ground beam.
3. The fixed-feed turning reflector antenna of claim 2, wherein the secondary reflector is a flat mirror, and the position of the mirror image focus of the primary reflector reflected by the flat mirror is the phase center of the feed.
4. The fixed-feed turning reflector antenna of claim 2, wherein the secondary reflector is an ellipsoidal mirror having a first focal point coincident with the focal point of the primary reflector and a second focal point that is the phase center of the feed.
5. The fixed feed turning reflector antenna of claim 3 or 4, wherein the main reflector rotation axis is an angular bisector of an angle formed by a focal point of the main reflector and a connecting line of two endpoints of the main reflector with the largest relative height difference.
6. The fixed feed turning reflector antenna of claim 3 or 4,
the first driver includes: the first motor is connected with one end of the connecting piece, the first motor is in driving connection with one end of the main anti-rotation shaft, the other end of the main anti-rotation shaft is fixedly connected with the main reflector, and the first motor drives the main anti-rotation shaft and drives the main reflector to rotate in a first direction;
the second drive member includes: the second motor drives the main and auxiliary reverse rotation rotating shafts and drives the auxiliary reflector to rotate in a second direction and drive the main reflector to revolve in the second direction.
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| CN202010186684.4A CN111211403B (en) | 2020-03-17 | 2020-03-17 | Fixed feed source steering reflector antenna |
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| CN202010186684.4A CN111211403B (en) | 2020-03-17 | 2020-03-17 | Fixed feed source steering reflector antenna |
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| CN111211403B true CN111211403B (en) | 2021-12-07 |
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| CN111864404A (en) * | 2020-08-10 | 2020-10-30 | 北京无线电测量研究所 | Off-axis double-offset Cassegrain antenna and satellite communication system comprising same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4755826A (en) * | 1983-01-10 | 1988-07-05 | The United States Of America As Represented By The Secretary Of The Navy | Bicollimated offset Gregorian dual reflector antenna system |
| CN101088194A (en) * | 2004-08-12 | 2007-12-12 | 波音公司 | Method and apparatus for mounting a rotating reflector antenna to minimize swept arc |
| US7411561B1 (en) * | 2005-04-27 | 2008-08-12 | The Boeing Company | Gimbaled dragonian antenna |
| CN204103047U (en) * | 2014-10-21 | 2015-01-14 | 中国工程物理研究院应用电子学研究所 | A kind of millimeter-wave near-field mechanical focusing dual reflector antenna |
| CN109921197A (en) * | 2019-01-31 | 2019-06-21 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Wave beam large-angle scanning dual reflector antenna |
-
2020
- 2020-03-17 CN CN202010186684.4A patent/CN111211403B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4755826A (en) * | 1983-01-10 | 1988-07-05 | The United States Of America As Represented By The Secretary Of The Navy | Bicollimated offset Gregorian dual reflector antenna system |
| CN101088194A (en) * | 2004-08-12 | 2007-12-12 | 波音公司 | Method and apparatus for mounting a rotating reflector antenna to minimize swept arc |
| US7411561B1 (en) * | 2005-04-27 | 2008-08-12 | The Boeing Company | Gimbaled dragonian antenna |
| CN204103047U (en) * | 2014-10-21 | 2015-01-14 | 中国工程物理研究院应用电子学研究所 | A kind of millimeter-wave near-field mechanical focusing dual reflector antenna |
| CN109921197A (en) * | 2019-01-31 | 2019-06-21 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Wave beam large-angle scanning dual reflector antenna |
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