CN117220007A - Novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna - Google Patents
Novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna Download PDFInfo
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Abstract
The invention discloses a novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna, which comprises: the device comprises a reflector assembly, an ellipsoidal auxiliary reflecting surface, an ellipsoidal auxiliary reflecting support, a feed source assembly, a rotating assembly, a bevel gear assembly and a locking and releasing device; the bevel gear assembly is positioned between the reflector assembly and the ellipsoidal auxiliary reflecting surface, so that the conversion of the transmission direction is realized; wherein the reflector assembly is connected with the rotating assembly through the bevel gear assembly; the ellipsoidal auxiliary reflecting surface is connected with the bevel gear assembly through an ellipsoidal auxiliary reverse support; the feed source component transversely penetrates through the rotating component inner side rotating shaft, is coaxially nested with the rotating component inner side rotating shaft, and is always kept fixed; the locking release device is connected with the bevel gear assembly and used for locking/unlocking the antenna. The novel millimeter wave wide-angle scanning mechanical movable reflecting surface antenna has the advantages of low cost, low heat consumption, low time delay and the like while meeting the requirements of high-frequency band, wide frequency band, high gain and wide-angle scanning characteristics.
Description
Technical Field
The invention belongs to the technical field of antenna design, and particularly relates to a novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna.
Background
The traditional mechanical movable reflecting surface antenna generally needs to use a rotary joint for realizing the continuous transmission of radio frequency signals in the rotation process of the antenna, the internal size of the rotary joint is smaller, the processing difficulty of the millimeter wave frequency band rotary joint is higher, and the performance is easily affected; on the other hand, the movable part of the traditional mechanically movable reflecting surface antenna is heavier, the waveguide assembly is longer, and the millimeter wave frequency band radio frequency loss is larger, so that the antenna gain is reduced, and the communication link margin is affected. Therefore, the inter-satellite communication antenna or the ground data transmission antenna working in the millimeter wave frequency band needs to solve the problems of higher processing and assembly precision requirements, gain reduction caused by larger insertion loss of radio frequency components and the like.
And the phased array antenna working in the millimeter wave frequency band, especially the high-gain array antenna with more array element requirements, has higher processing difficulty and higher processing cost due to smaller array element size, and has higher loss and heat consumption of the power synthesis/distribution network, the transmitting module/receiving module. Moreover, the scan angle is difficult to meet the near hemispherical space requirement.
Disclosure of Invention
The technical solution of the invention is as follows: the novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna has the advantages of low cost, low heat consumption, low time delay and the like while meeting the requirements of high frequency band, wide frequency band, high gain and wide angle scanning characteristics.
In order to solve the technical problems, the invention discloses a novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna, which comprises: the device comprises a reflector assembly, an ellipsoidal auxiliary reflecting surface, an ellipsoidal auxiliary reflecting support, a feed source assembly, a rotating assembly, a bevel gear assembly and a locking and releasing device;
the bevel gear assembly is positioned between the reflector assembly and the ellipsoidal auxiliary reflecting surface, so that the conversion of the transmission direction is realized; wherein the reflector assembly is connected with the rotating assembly through the bevel gear assembly; the ellipsoidal auxiliary reflecting surface is connected with the bevel gear assembly through an ellipsoidal auxiliary reverse support;
the feed source component transversely penetrates through the rotating component inner side rotating shaft, is coaxially nested with the rotating component inner side rotating shaft, and is always kept fixed;
the locking release device is connected with the bevel gear assembly and used for locking/unlocking the antenna.
In the novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna, the reflector assembly comprises: parabolic main reflecting surface, plane mirror and plane mirror support rod; the parabolic main reflecting surface is fixedly connected with the plane mirror through the plane mirror supporting rod; the parabolic main reflecting surface is connected with the rotating assembly through the bevel gear assembly.
In the novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna, the rotating assembly is a two-dimensional serial mechanism assembly and comprises two mutually independent rotating shafts which are coaxially nested and installed: pitch and cross pitch axes; the rotating assembly drives the reflector assembly to rotate around the pitching axis through the pitching rotating shaft, and the rotating assembly drives the reflector assembly to rotate around the crossed pitching axis through the crossed pitching rotating shaft and the bevel gear assembly; the ellipsoidal secondary reflective surface rotates with the reflector assembly about the pitch axis and does not rotate with the reflector assembly about the intersecting pitch axis.
In the novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna, the focal axis of the parabolic main reflecting surface is vertical to the beam axis and coincides with the crossed pitching axis; the plane mirror is perpendicular to the focal axis of the parabolic main reflecting surface and is positioned at the midpoint of the connecting line between the focal point of the parabolic main reflecting surface and the geometric center of the parabolic main reflecting surface; the ellipsoidal secondary reflecting surface comprises two focuses: the focal point A is positioned at the geometric center of the parabolic main reflecting surface, and the phase center of the feed source component coincides with the focal point B; the beam axis of the feed source component is perpendicular to the focal axis of the parabolic main reflecting surface and coincides with the pitching axis.
In the novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna, a hole is formed in the center of the parabolic main reflecting surface, the radiation beam of the feed source assembly passes through the hole in the center of the parabolic main reflecting surface after being reflected by the ellipsoidal auxiliary reflecting surface, and then irradiates the parabolic main reflecting surface through reflection of the plane mirror, and radiates out to the space.
In the above-mentioned novel millimeter wave wide angle scanning mechanical movable reflector antenna, the rotating assembly includes: the device comprises a fixed base, a pitching rotating shaft motor, a pitching rotating shaft angle sensor, a first pitching rotating shaft bearing, a second pitching rotating shaft bearing, a cross pitching rotating shaft motor, a cross pitching rotating shaft angle sensor and a cross pitching rotating shaft bearing;
the crossed pitching rotating shaft is positioned between the fixed base and the pitching rotating shaft, and the crossed pitching rotating shaft is connected with the fixed base through a crossed pitching rotating shaft bearing so as to realize relative rotation;
one side of the pitching rotating shaft is connected with the crossed pitching rotating shaft through a first pitching rotating shaft bearing, so that relative rotation is realized; the other side of the pitching rotating shaft is connected with the fixed base through a second pitching rotating shaft bearing, so that relative rotation is realized;
the pitching rotating shaft motor is connected with the pitching rotating shaft and used for driving the pitching rotating shaft to rotate;
the crossed pitching rotating shaft motor is connected with the crossed pitching rotating shaft and used for driving the crossed pitching rotating shaft to rotate;
a pitching rotating shaft angle sensor and a crossed pitching rotating shaft angle sensor are arranged on the fixed base; the pitching rotating shaft angle sensor is used for measuring the rotating angle of the pitching rotating shaft; the crossed pitching rotating shaft angle sensor is used for measuring the rotating angle of the crossed pitching rotating shaft;
the feed source component is fixedly connected with the fixed base, so that the feed source component is kept motionless all the time in the rotating process of the rotating shaft of the rotating component.
In the above-mentioned novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna, the bevel gear assembly includes: the device comprises a first bevel gear, a first bevel gear bracket, a second bevel gear bracket, a second bevel gear bearing and a pitching bracket;
the first bevel gear is fixedly connected with the first bevel gear bracket, and the second bevel gear is fixedly connected with the second bevel gear bracket; wherein, the first bevel gear and the second bevel gear are axially coplanar and orthogonal to form an orthogonal bevel gear pair;
the pitching support is an L-shaped support; one end of the pitching bracket is connected with a second bevel gear through a second bevel gear bearing to realize relative rotation; the other end of the pitching bracket is coaxially nested in the first bevel gear bracket.
In the novel millimeter wave wide angle scanning mechanically movable reflective surface antenna described above,
the ellipsoidal auxiliary reflecting surface is fixedly connected with the pitching support through an ellipsoidal auxiliary reverse support;
the second bevel gear bracket is fixedly connected with the parabolic main reflecting surface;
the first bevel gear bracket is fixedly connected with the crossed pitching rotating shaft, and the pitching direction rotation of the crossed pitching rotating shaft drives the reflector assembly to rotate in the crossed pitching direction through the orthogonal bevel gear pair so as to realize the orthogonal conversion of the transmission direction;
the pitching bracket is fixedly connected with the pitching rotating shaft, and the pitching rotating shaft rotates in the pitching direction to drive the whole bevel gear assembly and the reflector assembly to rotate in the pitching direction;
the lock release is mounted on the second bevel gear bracket.
The novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna further comprises: a first feed source bearing and a second feed source bearing; the feed source assembly is partially coaxially nested in the pitching rotating shaft, and the feed source assembly is connected with the pitching rotating shaft through a first feed source bearing and a second feed source bearing to realize relative rotation.
In the novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna, when the locking and releasing device is in a locking state, the positions of the parabolic main reflecting surface, the plane mirror and the ellipsoidal auxiliary reflecting surface are locked; when the locking and releasing device is in an unlocking state, the two-dimensional rotation of the parabolic main reflecting surface, the plane mirror and the ellipsoidal auxiliary reflecting surface is realized through the rotating assembly.
The invention has the following advantages:
(1) The invention discloses a novel millimeter wave frequency band wide-angle scanning mechanical movable reflecting surface antenna, which provides a novel high-gain two-dimensional scanning antenna scheme aiming at high frequency band, wide frequency band and wide coverage requirements, and because the radio frequency part is simple in structure and a rotary joint required by the traditional mechanical scanning antenna is omitted, the novel millimeter wave frequency band wide-angle scanning mechanical movable reflecting surface antenna has relatively low processing difficulty, low cost and low loss; the proposal of the reflecting surface assembly composed of the parabolic main reflector, the plane mirror and the ellipsoidal auxiliary reflector skillfully ensures that one-dimensional scanning is realized by rotating the combination of the parabolic main reflector and the plane mirror under the condition that the feed source assembly is fixed, and the other-dimensional scanning is realized by rotating the whole reflecting surface assembly. The novel scanning antenna based on the novel scanning principle can realize the beam scanning range of near hemispherical space, has no singular point in the whole scanning area, and therefore, does not need to use a high-speed rotating mechanism.
(2) The invention discloses a novel millimeter wave frequency band wide-angle scanning mechanical movable reflecting surface antenna, and the novel two-dimensional scanning mechanism adopts a shafting series nested structure, and realizes orthogonal transformation of one shafting transmission direction through a bevel gear, thereby realizing biaxial orthogonal rotation; by optimizing the structural parameters of the novel reflector antenna, a relatively compact design can be achieved to reduce the weight and size of the rotating part. In addition, the unfolding rotation envelope of the mechanism is small.
Drawings
FIG. 1 is a schematic diagram of a novel millimeter wave wide angle scanning mechanical movable reflector antenna in an embodiment of the present invention;
FIG. 2 is a schematic diagram of RF constitution and beam scanning of a novel millimeter wave wide angle scanning mechanical movable reflector antenna in accordance with an embodiment of the present invention;
FIG. 3 is a schematic illustration of the coupling of a rotating assembly to a bevel gear assembly in accordance with an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a bevel gear assembly in accordance with an embodiment of the present invention;
FIG. 5 is a schematic view of a pitch bracket according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of a rotating assembly according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a connection of a feed assembly to a rotating assembly in accordance with an embodiment of the present invention;
fig. 8 is a schematic diagram of the power conduction of an antenna according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention disclosed herein will be described in further detail with reference to the accompanying drawings.
One of the core ideas of the invention is: based on the traditional reflector antenna, the conversion of virtual and real focuses is carried out by utilizing the plane mirror and the ellipsoidal pair counter, so that a novel reflector antenna assembly is constructed, the antenna virtual focal axis, the real focal axis and the beam axis are orthogonal in pairs, a novel two-dimensional beam mechanical scanning mechanism is constructed, radio frequency components with small processing sizes such as rotary joints are not required, and the processing difficulty and cost are reduced. The antenna main reflector is connected with the two-dimensional serial rotating assembly through the support and the bevel gear, so that the conversion of motion and power between two orthogonal axes is realized, and the light weight and compact design of the antenna are facilitated. The novel millimeter wave wide-angle scanning mechanical movable reflecting surface antenna is suitable for being applied to higher frequency bands such as a W frequency band, has the characteristics of wide frequency band, low loss, high gain and wide-angle scanning, and simultaneously has the advantages of low cost, low heat consumption and short time delay.
As shown in fig. 1, in the present embodiment, the novel millimeter wave wide angle scanning mechanically movable reflecting surface antenna includes: the anti-theft device comprises a reflector assembly 1, an ellipsoidal sub-reflecting surface 2, an ellipsoidal sub-reflecting support 3, a feed source assembly 4, a rotating assembly 5, a bevel gear assembly 6 and a locking release device 9. The bevel gear assembly 6 is located between the reflector assembly 1 and the ellipsoidal auxiliary reflecting surface 2, so that the transmission direction is converted, the reflector assembly 1 is not required to be directly connected with the rotating assembly 5, the compactness and the light weight design of the whole antenna are facilitated, the inertia of rotatable parts is reduced, and the cable hooking risk of the rotating assembly 5 is reduced. The reflector assembly 1 is connected with the rotating assembly 5 through the bevel gear assembly 6; the ellipsoidal auxiliary reflecting surface 2 is connected with the bevel gear assembly 6 through the ellipsoidal auxiliary counter bracket 3. The feed source component 4 traverses the rotating shaft at the inner side of the rotating component 5, is coaxially nested with the rotating shaft at the inner side of the rotating component 5, and is always kept fixed. A lock release 9 is connected to the bevel gear assembly 6 for locking/unlocking the antenna.
In this embodiment, the reflector assembly 1 may specifically include: parabolic main reflecting surface 101, plane mirror 102, plane mirror support 103. Wherein the parabolic main reflecting surface 101 and the plane mirror 102 are fixedly connected through a plane mirror support rod 103; the parabolic main reflecting surface 101 is connected with the rotating assembly 5 through the bevel gear assembly 6.
Preferably, as shown in fig. 2, the focal axis of the parabolic primary reflecting surface 101 is perpendicular to the beam axis and coincides with the intersecting pitch axis. The plane mirror 102 is perpendicular to the focal axis of the parabolic main reflecting surface 101 and is located at the midpoint of the line connecting the focal point of the parabolic main reflecting surface 101 and the geometric center of the parabolic main reflecting surface 101. The ellipsoidal secondary reflecting surface 2 comprises two foci: and the focus A and the focus B are positioned at the geometric center of the parabolic main reflecting surface 101, and the phase center of the feed source assembly 4 coincides with the focus B. The beam axis of the feed assembly 4 is perpendicular to the focal axis of the parabolic primary reflector 101 and coincides with the pitch axis.
Further, the center of the parabolic main reflecting surface 101 is provided with a hole, and the radiation beam of the feed source assembly 4 passes through the center of the parabolic main reflecting surface 101 after being reflected by the ellipsoidal auxiliary reflecting surface 2 and then irradiates the parabolic main reflecting surface 101 after being reflected by the plane mirror 102, and is radiated to the space.
It should be noted that, the parabolic main reflecting surface 101 may be, but not limited to, a offset feedback reflecting surface antenna with an offset height of 2 times of focal length, and the focal axis is perpendicular to the beam axis. The mirror 102 may be, but is not limited to, circular or elliptical. The dimensions of the plane mirror 102 and the ellipsoidal secondary reflection surface 2 are selected based on the principle of low electromagnetic wave leakage rate. The center hole of the parabolic main reflecting surface 101 may be, but not limited to, a circular hole, and the diameter of the circular hole is selected based on the principle that the electromagnetic wave passing rate is high and the influence on the gain is small.
In this embodiment, the rotating assembly 5 is a two-dimensional serial mechanism assembly, and includes two mutually independent rotating shafts that are coaxially nested and mounted: pitch axis 502 and cross pitch axis 507. The rotation component 5 realizes the two-dimensional rotation of pitching and crossed pitching of the reflector component 1 through the pitching rotating shaft 502 and the crossed pitching rotating shaft 507, realizes the two-dimensional pointing function of the antenna beam, completes the beam scanning of the antenna, and has the beam coverage of +/-85 degrees in the near hemispherical space. Wherein, the rotation component 5 drives the reflector component 1 to rotate around a pitching axis through the pitching rotating shaft 502, and the rotation component 5 drives the reflector component 1 to rotate around a crossed pitching axis through the crossed pitching rotating shaft 507 and the bevel gear component 6; the ellipsoidal secondary reflective surface 2 rotates with the reflector assembly 1 about the pitch axis and does not rotate with the reflector assembly 1 about the intersecting pitch axis.
Preferably, as shown in fig. 3 to 6, the rotating assembly 5 may specifically include: a fixed mount 501, a pitch spindle 502, a pitch spindle motor 503, a pitch spindle angle sensor 504, a first pitch spindle bearing 505, a second pitch spindle bearing 506, a cross pitch spindle 507, a cross pitch spindle motor 508, a cross pitch spindle angle sensor 509, and a cross pitch spindle bearing 510. The crossed pitching rotating shaft 507 is located between the fixed base 501 and the pitching rotating shaft 502, and the crossed pitching rotating shaft 507 is connected with the fixed base 501 through a crossed pitching rotating shaft bearing 510, so as to realize relative rotation. One side of the pitching rotating shaft 502 is connected with the crossed pitching rotating shaft 507 through a first pitching rotating shaft bearing 505 to realize relative rotation; the other side of the pitching rotating shaft 502 is connected with the fixed base 501 through a second pitching rotating shaft bearing 506, so that relative rotation is realized. The pitch rotation shaft motor 503 is connected to the pitch rotation shaft 502, and is used for driving the pitch rotation shaft 502 to rotate. The cross pitch shaft motor 508 is connected to the cross pitch shaft 507 and is used for driving the cross pitch shaft 507 to rotate. A pitching rotation shaft angle sensor 504 and a crossed pitching rotation shaft angle sensor 509 are installed on the fixed base 501; a pitch rotation shaft angle sensor 504 for measuring a rotation angle of the pitch rotation shaft 502; a cross pitch axis angle sensor 509 for measuring the angle of rotation of the cross pitch axis 507. The feed source component 4 is fixedly connected with the fixed base 501, so that the feed source component 4 is kept still all the time in the rotating process of the rotating shaft of the rotating component 5.
As shown in fig. 8, the whole body formed by the parabolic main reflecting surface 101, the plane mirror 102 and the ellipsoidal auxiliary reflecting surface 2 can rotate around a pitching axis to realize pitching beam scanning; the whole body formed by the parabolic main reflecting surface 101 and the plane mirror 102 can rotate around a crossed pitching axis to realize crossed pitching beam scanning; the directions of the crossed pitch axes rotate along with the rotation of the pitch axes. It should be noted that the pitch axis may be defined as the X axis, and the intersecting pitch axis as the Y axis.
In this embodiment, as shown in fig. 3 to 6, the bevel gear assembly 6 may specifically include: a first bevel gear 601, a first bevel gear support 602, a second bevel gear 603, a second bevel gear support 604, a second bevel gear bearing 605 and a pitch support 606. Wherein, the first bevel gear 601 is fixedly connected with the first bevel gear bracket 602, and the second bevel gear 603 is fixedly connected with the second bevel gear bracket 604; the first bevel gear 601 is axially coplanar and orthogonal to the second bevel gear 603, forming an orthogonal bevel gear pair. The pitch bracket 606 is an L-shaped bracket; one end of the pitching bracket 606 is connected with a second bevel gear 603 through a second bevel gear bearing 605 to realize relative rotation; the other end of the pitch bracket 606 is nested coaxially inside the first bevel gear bracket 602. It should be noted that: the first bevel gear 601 and the second bevel gear 603 can be straight bevel gears with a modulus ratio greater than 1, so as to play a role of speed reduction.
Preferably, the ellipsoidal minor reflective surface 2 is fixedly connected to the pitch support 606 by the ellipsoidal minor reflective support 3. The second bevel gear bracket 604 is fixedly connected with the parabolic main reflecting surface 101. The first bevel gear bracket 602 is fixedly connected with the crossed pitching rotating shaft 507, and the pitching direction rotation of the crossed pitching rotating shaft 507 drives the reflector assembly 1 to rotate in the crossed pitching direction through the orthogonal bevel gear pair, so that the orthogonal conversion of the transmission direction is realized. The pitching bracket 606 is fixedly connected with the pitching rotating shaft 502, and pitching rotation of the pitching rotating shaft 502 drives the whole bevel gear assembly 6 and the reflector assembly 1 to rotate in pitching direction. The lock release 9 is mounted on the second bevel gear bracket 604.
In this embodiment, the novel millimeter wave wide angle scanning mechanically movable reflecting surface antenna may further include: a first feed bearing 7 and a second feed bearing 8. As shown in fig. 7, a part of the feed source assembly 4 is coaxially nested in the pitching rotating shaft 502, and the feed source assembly 4 is connected with the pitching rotating shaft 502 through a first feed source bearing 7 and a second feed source bearing 8 to realize relative rotation.
In the present embodiment, when the lock release device 9 is in the locked state, the positions of the parabolic main reflecting surface 101, the plane mirror 102, and the ellipsoidal sub-reflecting surface 2 are locked; when the locking and releasing device 9 is in an unlocking state, the rotation assembly 5 realizes two-dimensional rotation of the parabolic main reflecting surface 101, the plane mirror 102 and the ellipsoidal auxiliary reflecting surface 2.
In summary, the invention discloses a novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna, which provides a novel high-gain two-dimensional scanning antenna scheme aiming at high frequency band, wide frequency band and wide coverage requirements, and because the radio frequency component has simple structure and omits a rotary joint required by the traditional mechanical scanning antenna, the novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna has relatively low processing difficulty, low cost, low loss and high gain; the proposal of the reflecting surface assembly composed of the parabolic main reflector, the plane mirror and the ellipsoidal auxiliary reflector skillfully ensures that one-dimensional scanning is realized by rotating the combination of the parabolic main reflector and the plane mirror under the condition that the feed source assembly is fixed, and the other-dimensional scanning is realized by rotating the whole reflecting surface assembly. The novel scanning antenna is realized based on a novel scanning principle, can realize the beam scanning range of a near hemispherical space, has no singular point in the whole scanning area, and does not need to use a high-speed rotating mechanism; the proposed novel two-dimensional scanning mechanism adopts a shafting series nested structure, and realizes orthogonal transformation of one shafting transmission direction through a bevel gear, thereby realizing biaxial orthogonal rotation; by optimizing the structural parameters of the novel reflector antenna, a relatively compact design can be achieved to reduce the weight and size of the rotating part. In addition, the unfolding rotation envelope of the mechanism is small. The novel millimeter wave wide-angle scanning movable reflecting surface antenna can be applied to a satellite-borne platform, is used as an inter-satellite link communication antenna or a ground data transmission antenna, and has a wide application prospect.
Although the present invention has been described in terms of the preferred embodiments, it is not intended to be limited to the embodiments, and any person skilled in the art can make any possible variations and modifications to the technical solution of the present invention by using the methods and technical matters disclosed above without departing from the spirit and scope of the present invention, so any simple modifications, equivalent variations and modifications to the embodiments described above according to the technical matters of the present invention are within the scope of the technical matters of the present invention.
What is not described in detail in the present specification belongs to the known technology of those skilled in the art.
Claims (10)
1. A novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna, comprising: the anti-theft device comprises a reflector assembly (1), an ellipsoidal auxiliary reflecting surface (2), an ellipsoidal auxiliary reflecting support (3), a feed source assembly (4), a rotating assembly (5), a bevel gear assembly (6) and a locking release device (9);
the bevel gear assembly (6) is positioned between the reflector assembly (1) and the ellipsoidal auxiliary reflecting surface (2), so that the conversion of the transmission direction is realized; wherein the reflector assembly (1) is connected with the rotating assembly (5) through the bevel gear assembly (6); the ellipsoidal auxiliary reflecting surface (2) is connected with the bevel gear assembly (6) through the ellipsoidal auxiliary reflecting bracket (3);
the feed source component (4) traverses the rotating shaft at the inner side of the rotating component (5), is coaxially nested and installed with the rotating shaft at the inner side of the rotating component (5), and is always kept fixed;
the locking and releasing device (9) is connected with the bevel gear assembly (6) and is used for locking/unlocking the antenna.
2. The novel millimeter wave wide angle scanning mechanically movable reflective surface antenna according to claim 1, characterized by a reflector assembly (1) comprising: a parabolic main reflecting surface (101), a plane mirror (102) and a plane mirror support rod (103); the parabolic main reflecting surface (101) and the plane mirror (102) are fixedly connected through a plane mirror supporting rod (103); the parabolic main reflecting surface (101) is connected with the rotating assembly (5) through the bevel gear assembly (6).
3. The novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna according to claim 2, characterized in that the rotating assembly (5) is a two-dimensional serial mechanism assembly and comprises two mutually independent rotating shafts which are coaxially nested and mounted: a pitch axis (502) and a cross pitch axis (507); the rotating assembly (5) drives the reflector assembly (1) to rotate around a pitching axis through a pitching rotating shaft (502), and the rotating assembly (5) drives the reflector assembly (1) to rotate around a crossed pitching axis through a crossed pitching rotating shaft (507) and a bevel gear assembly (6); the ellipsoidal sub-reflecting surface (2) rotates along with the reflector assembly (1) rotating around the pitching axis and does not rotate along with the reflector assembly (1) rotating around the crossed pitching axis.
4. The novel millimeter wave wide angle scanning mechanically movable reflective surface antenna as recited in claim 2, characterized in that the focal axis of the parabolic main reflective surface (101) is perpendicular to the beam axis and coincides with the intersecting pitch axis; the plane mirror (102) is perpendicular to the focal axis of the parabolic main reflecting surface (101) and is positioned at the midpoint of the connecting line between the focal point of the parabolic main reflecting surface (101) and the geometric center of the parabolic main reflecting surface (101); the ellipsoidal secondary reflecting surface (2) comprises two focuses: the focus A is positioned at the geometric center of the parabolic main reflecting surface (101), and the phase center of the feed source component (4) coincides with the focus B; the beam axis of the feed source component (4) is perpendicular to the focal axis of the parabolic main reflecting surface (101) and coincides with the pitching axis.
5. The novel millimeter wave wide-angle scanning mechanical movable reflecting surface antenna according to claim 4, wherein a hole is formed in the center of the parabolic main reflecting surface (101), and the radiation beam of the feed source assembly (4) passes through the hole in the center of the parabolic main reflecting surface (101) after being reflected by the ellipsoidal auxiliary reflecting surface (2) and irradiates the parabolic main reflecting surface (101) through reflection of the plane mirror (102) to radiate out to the space.
6. A novel millimeter wave wide angle scanning mechanically movable reflective surface antenna according to claim 3, characterized in that the rotating assembly (5) comprises: the device comprises a fixed base (501), a pitching rotating shaft (502), a pitching rotating shaft motor (503), a pitching rotating shaft angle sensor (504), a first pitching rotating shaft bearing (505), a second pitching rotating shaft bearing (506), a crossed pitching rotating shaft (507), a crossed pitching rotating shaft motor (508), a crossed pitching rotating shaft angle sensor (509) and a crossed pitching rotating shaft bearing (510);
the crossed pitching rotating shaft (507) is positioned between the fixed base (501) and the pitching rotating shaft (502), and the crossed pitching rotating shaft (507) is connected with the fixed base (501) through a crossed pitching rotating shaft bearing (510) to realize relative rotation;
one side of the pitching rotating shaft (502) is connected with the crossed pitching rotating shaft (507) through a first pitching rotating shaft bearing (505) to realize relative rotation; the other side of the pitching rotating shaft (502) is connected with the fixed base (501) through a second pitching rotating shaft bearing (506) to realize relative rotation;
the pitching rotating shaft motor (503) is connected with the pitching rotating shaft (502) and is used for driving the pitching rotating shaft (502) to rotate;
the crossed pitching rotating shaft motor (508) is connected with the crossed pitching rotating shaft (507) and is used for driving the crossed pitching rotating shaft (507) to rotate;
a pitching rotating shaft angle sensor (504) and a crossed pitching rotating shaft angle sensor (509) are arranged on the fixed base (501); wherein the pitching rotating shaft angle sensor (504) is used for measuring the rotating angle of the pitching rotating shaft (502); a cross pitch shaft angle sensor (509) for measuring the rotation angle of the cross pitch shaft (507);
the feed source component (4) is fixedly connected with the fixed base (501), so that the feed source component (4) is kept still all the time in the rotating process of the rotating shaft of the rotating component (5).
7. The novel millimeter wave wide angle scanning mechanically movable reflective surface antenna of claim 6, characterized by a bevel gear assembly (6) comprising: a first bevel gear (601), a first bevel gear support (602), a second bevel gear (603), a second bevel gear support (604), a second bevel gear bearing (605) and a pitch support (606);
the first bevel gear (601) is fixedly connected with the first bevel gear bracket (602), and the second bevel gear (603) is fixedly connected with the second bevel gear bracket (604); wherein, the first bevel gear (601) and the second bevel gear (603) are axially coplanar and orthogonal to form an orthogonal bevel gear pair;
the pitching bracket (606) is an L-shaped bracket; one end of the pitching bracket (606) is connected with a second bevel gear (603) through a second bevel gear bearing (605) to realize relative rotation; the other end of the pitching bracket (606) is coaxially nested inside the first bevel gear bracket (602).
8. The novel millimeter-wave wide-angle scanning mechanically movable reflective surface antenna as claimed in claim 7,
the ellipsoidal auxiliary reflecting surface (2) is fixedly connected with the pitching support (606) through the ellipsoidal auxiliary reflecting support (3);
the second bevel gear bracket (604) is fixedly connected with the parabolic main reflecting surface (101);
the first bevel gear bracket (602) is fixedly connected with the crossed pitching rotating shaft (507), and the pitching direction rotation of the crossed pitching rotating shaft (507) drives the reflector assembly (1) to rotate in the crossed pitching direction through the orthogonal bevel gear pair, so that the orthogonal conversion of the transmission direction is realized;
the pitching bracket (606) is fixedly connected with the pitching rotating shaft (502), and the pitching rotating shaft (502) rotates in the pitching direction to drive the whole bevel gear assembly (6) and the reflector assembly (1) to rotate in the pitching direction;
the lock release device (9) is mounted on the second bevel gear bracket (604).
9. The novel millimeter-wave wide-angle scanning mechanically movable reflective surface antenna according to claim 5, further comprising: a first feed bearing (7) and a second feed bearing (8); the feed source assembly (4) is partially coaxially nested in the pitching rotating shaft (502), and the feed source assembly (4) is connected with the pitching rotating shaft (502) through the first feed source bearing (7) and the second feed source bearing (8) so as to realize relative rotation.
10. The novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna according to claim 2, characterized in that when the lock release device (9) is in a locked state, the positions of the parabolic main reflecting surface (101), the plane mirror (102) and the ellipsoidal sub-reflecting surface (2) are locked; when the locking and releasing device (9) is in an unlocking state, the two-dimensional rotation of the parabolic main reflecting surface (101), the plane mirror (102) and the ellipsoidal auxiliary reflecting surface (2) is realized through the rotating assembly (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311275088.3A CN117220007A (en) | 2023-09-28 | 2023-09-28 | Novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311275088.3A CN117220007A (en) | 2023-09-28 | 2023-09-28 | Novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117220007A true CN117220007A (en) | 2023-12-12 |
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ID=89036971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311275088.3A Pending CN117220007A (en) | 2023-09-28 | 2023-09-28 | Novel millimeter wave wide angle scanning mechanical movable reflecting surface antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117220007A (en) |
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2023
- 2023-09-28 CN CN202311275088.3A patent/CN117220007A/en active Pending
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