Feed source supporting sleeve suitable for vehicle-mounted Grignard dual-bias antenna

Abstract

The utility model provides a feed source support sleeve suitable for a vehicle-mounted Gridgli dual-bias antenna, the feed source support sleeve is installed at the feed source phase center of the Gridgli dual-bias antenna, the feed source support sleeve comprises a semi-arc sleeve, a side plate and a support sleeve bottom plate, the semi-arc sleeve, the side plate and the support sleeve bottom plate form a closed space, and the semi-arc sleeve is arranged in the closed space. The side plate is close to the main reflecting surface of the antenna, the other side surface of the semi-arc sleeve opposite to the side plate is close to the auxiliary reflecting surface of the antenna, the feed source outlet is close to the side plate, and the feed source horn is close to the other side surface of the semi-arc sleeve opposite to the side plate. According to the feed source support sleeve designed by the invention, the size and weight of the whole feed source are greatly reduced, the installation requirement of small space of a small vehicle-mounted antenna is met, and irradiation shielding of the auxiliary reflector to the main reflector and irradiation shielding of the feed source and the support rod on the feed source to the auxiliary reflector can be avoided; therefore, the paraxial sidelobe characteristic of a secondary radiation pattern and the input voltage standing-wave ratio characteristic of the feed source are improved, and rainwater, dust and the like can be effectively prevented from invading a feed system.

Description

Technical Field

[0001] The utility model belongs to the technical field of feed source support sleeves, and in particular relates to a feed source support sleeve suitable for a vehicle-mounted Gregorian double-bias antenna. Background Art

[0002] The antenna consists of the main reflector, sub-reflector, feed and other parts. The feed support is an important part of the feed, providing protection and support for the feed, preventing rain, dust and other substances from invading the feed system, and directly ensuring that the phase center of the feed is at the focus of the sub-reflector. The accuracy of the phase center position is directly related to the accuracy of the entire antenna receiving and transmitting signals.

[0003] At present, due to the development of society and the further exploration of space by human beings, the size of antennas has increased from four meters to large antennas of 70 meters or even hundreds of meters. The existing feed support sleeve is welded by upper flange, cone tube and lower flange, and all materials are made of steel. The feed support sleeve is a cone with the central axis as the axis. In order to ensure that the phase center of the feed is at the focus of the secondary surface, the feed support sleeve has been increased to three layers.

[0004] At present, in order to meet the needs of scientific and technological development, antennas need to have strong transport and transfer capabilities. Therefore, the demand for vehicle-mounted antennas is gradually expanding. Taking into account the requirements of small vehicle-mounted stations for space layout, electrical performance and feed switching, vehicle-mounted antennas are preferably small-volume dual-offset Gregorian antennas. The main reflector of the Gregorian dual-offset antenna is part of the parabola, and the secondary reflector is part of the ellipsoid. One focus of the ellipsoid is at the focus of the parabola, and the other focus coincides with the phase center of the feed source.

[0005] Since the secondary reflector and the main reflector of the dual-offset Gregorian antenna are of an integrated design, the existing conical support sleeve is too large and has the problem of illumination shielding, and cannot meet the installation requirements of the vehicle-mounted Gregorian dual-offset antenna. Utility Model Content

[0006] The utility model aims to solve the problem that the existing feed support sleeve cannot be installed on the vehicle-mounted Gregorian double-bias antenna, and provides a feed support sleeve suitable for the vehicle-mounted Gregorian double-bias antenna.

[0007] To achieve the above purpose, the technical solution provided by the utility model is:

[0008] A feed support sleeve suitable for a vehicle-mounted Gregorian double-bias antenna, wherein the feed support sleeve is installed at the feed phase center of the Gregorian double-bias antenna, and the feed support sleeve comprises:

[0009] A semi-arc sleeve, wherein the semi-arc sleeve is hollow inside and has one side and a bottom that are open;

[0010] A side plate, the side plate is installed at the side opening of the semi-arc sleeve and is fixedly connected to the top surface and the vertical side surface of the semi-arc sleeve respectively, and is provided with an interface for electrical connection;

[0011] The support sleeve bottom plate is installed at the bottom opening of the semi-arc sleeve and is respectively perpendicular and fixedly connected to the vertical side surface of the semi-arc sleeve and the bottom of the side plate;

[0012] Among them, the semi-arc sleeve, the side plate and the support sleeve bottom plate form an enclosed space, the feed support sleeve is detachably installed at the feed phase center of the Gregorian double offset antenna through the support sleeve bottom plate, and the side plate is close to the main reflection surface of the Gregorian double offset antenna, the other side of the semi-arc sleeve opposite to the side plate is close to the secondary reflection surface of the Gregorian double offset antenna, the feed source is installed on the support sleeve bottom plate, and the feed source outlet is close to the side plate, and the feed horn is close to the other side of the semi-arc sleeve opposite to the side plate.

[0013] Furthermore, the top surface of the semi-arc sleeve is a two-stage flat-top arch structure with different curvatures, wherein the arch radius of a section of the flat-top arch structure close to the main emitting surface of the Gregorian double-offset antenna is 295-296 mm;

[0014] The arch radius at the lower end of another flat-top arch structure close to the secondary reflector of the Gregorian double-offset antenna is 183-184 mm, and the arch radius at the higher end is consistent with the arch radius of the flat-top arch structure close to the secondary reflector of the Gregorian double-offset antenna, and the arch radius from the lower end to the high end is evenly transitioned.

[0015] Furthermore, the distance between the top surface of the semi-arc sleeve and the top surface of the feed source is 3 to 30 mm.

[0016] Furthermore, a first sealing groove is provided on the vertical side surface of the support sleeve bottom plate and the semi-arc sleeve and the fixed connection surface at the bottom of the side plate, and a sealing gasket is installed in the first sealing groove.

[0017] Furthermore, a second sealing groove is provided on the inner ring of the interface of the side plate, and a sealing ring is installed in the second sealing groove.

[0018] Furthermore, the semi-arc sleeve is made of glass fiber reinforced plastic.

[0019] Furthermore, the side panels and the support sleeve bottom plate are made of metal.

[0020] Furthermore, the semi-arc sleeve, the side plate and the support sleeve bottom plate are fixed to each other by screws or bolts.

[0021] Beneficial effects:

[0022] The feed support sleeve designed by the utility model greatly reduces the volume and weight of the entire feed source, and is suitable for the installation requirements of small vehicle-mounted antennas with small space. The feed support sleeve is installed at the phase center of the feed source between the main reflector and the secondary reflector, which can better avoid the secondary reflector from blocking the main reflector and the feed source and the support rod thereon from blocking the secondary reflector, thereby improving the near-axis sidelobe characteristics of the secondary radiation pattern and the input voltage standing wave ratio characteristics of the feed source; the feed support sleeve is fully enclosed, which can effectively prevent rain, dust, etc. from invading the feeding system, and the support sleeve bottom plate and side plates are made of metal material, which ensures the stability of the entire feed source installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The features and advantages of the present invention will become more easily understood through the following description with reference to the accompanying drawings, which are not drawn to scale and some features are enlarged or reduced to show details of specific components.

[0024] In the figure:

[0025] Figure 1 It is a schematic diagram of assembling a feed source support sleeve in an exemplary embodiment of the utility model;

[0026] Figure 2 It is a side structural schematic diagram of a semi-arc sleeve in an exemplary embodiment of the utility model;

[0027] Figure 3 In the exemplary embodiment of the present invention Figure 2 K-direction schematic diagram;

[0028] Figure 4 It is a schematic diagram of the bottom structure of the semi-arc sleeve in the exemplary embodiment of the utility model;

[0029] Figure 5 It is a structural schematic diagram of a side panel in an exemplary embodiment of the utility model;

[0030] Figure 6 It is a structural schematic diagram of the support sleeve bottom plate in an exemplary embodiment of the utility model.

[0031] In the figure: 1-semi-arc sleeve; 2-side plate; 3-support sleeve bottom plate; 4-sealing gasket; 5-screw; 6-bolt. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to the accompanying drawings by means of exemplary embodiments of the present invention. It should be noted that the following detailed description of the present invention is only for the purpose of illustration, and is not intended to limit the present invention.

[0033] The exemplary embodiment of the present utility model provides a feed support sleeve suitable for a vehicle-mounted Gregorian double-bias antenna, wherein the feed support sleeve is installed at the feed phase center of the Gregorian double-bias antenna. Specifically, taking the Ku-band feed as an example, Figure 1 As shown, the feed support sleeve includes: a semi-arc sleeve 1, a side plate 2 and a support sleeve bottom plate 3.

[0034] The semi-arc sleeve 1 is made of glass fiber reinforced plastic. Figures 2 to 4 As shown, it is a structure with a hollow interior and an open side and bottom. The width of the hollow interior is 334 mm and the length is 464 mm. Figure 1 , 3 As shown, the top surface of the semi-arc sleeve is a two-stage flat-top arched structure with different curvatures, wherein the arch radius of a section of the flat-top arched structure close to the main reflection surface of the Gregorian double-biased antenna is 295.68mm; the arch radius of the other section of the flat-top arched structure close to the secondary reflection surface of the Gregorian double-biased antenna at the lower end is 183.65mm, and the arch radius at the high end is consistent with the arch radius of the section of the flat-top arched structure close to the secondary reflection surface of the Gregorian double-biased antenna, and the arch radius from the low end to the high end is uniformly transitioned. At the same time, the thickness of the other side of the semi-arc sleeve 1 opposite to the side with the opening is 1.5mm, and the thickness of the remaining set of opposite sides is 3mm, and the height is 140mm.

[0035] The side plate 2 is made of metal material, such as Figure 1 As shown, it is installed at the side opening of the semi-arc sleeve 1, and is fixedly connected to the top surface and vertical side surface of the semi-arc sleeve 1 by screws 5, as shown in FIG. Figure 5 As shown, it is provided with multiple interfaces for electrical connection, namely: an interface for powering the feed source, an interface for data backup, an interface for monitoring, and an interface for detecting the Ku-band uplink, and each interface of the side panel 2 is provided with a second sealing groove in the inner circle, and a sealing ring is installed in the second sealing groove to ensure the waterproofness of the entire feed support sleeve and prevent water vapor, dust, etc. from invading the feed source.

[0036] The support sleeve bottom plate 3 is made of metal material, such as Figure 1 , 6 As shown, it is installed at the bottom opening of the semi-arc sleeve 1, and is respectively perpendicular to the vertical side of the semi-arc sleeve 1 and the bottom of the side plate 2 and fixedly connected by bolts 6. The support sleeve bottom plate 3 is 350mm long and 480mm wide. The support sleeve bottom plate 3 is provided with a feed source and mounting holes for installing on the Gregorian double-bias antenna. A first sealing groove is provided on the fixed connection surface between the support sleeve bottom plate 3 and the vertical side of the semi-arc sleeve 1 and the bottom of the side plate 2. A sealing gasket 4 is installed in the first sealing groove. The sealing gasket 4 is made of silicone material to further improve the waterproofness of the feed support sleeve.

[0037] Among them, Figure 1 As shown, the semi-arc sleeve 1, the side plate 2 and the support sleeve bottom plate 3 form a closed space. The semi-arc sleeve 1 is made of fiberglass to avoid irradiation shielding, thereby improving the near-axis side lobe characteristics of the secondary radiation pattern and the input voltage standing wave ratio characteristics of the feed source. At the same time, as an inorganic non-metallic material, it has good hardness and strength, and on the other hand, it has good processing performance and can form an arched structure with a certain strength. The side plate 2 and the support sleeve bottom plate 3 are made of metal to ensure the strength and stability of the entire Gregorian double-bias antenna feed source. At the same time, the sealing pad 4 of the silicone rubber sheet material can ensure the rainproofness of the entire feed source. The support sleeve bottom plate 3 is detachably mounted at the feed phase center of the Gregorian double bias antenna by means of bolts 6, and the side plate 2 is close to the main reflection surface of the Gregorian double bias antenna, and the other side of the semi-arc sleeve 1 opposite to the side plate 2 is close to the secondary reflection surface of the Gregorian double bias antenna. The feed source is mounted on the support sleeve bottom plate 3, and the feed source outlet is close to the side plate 2, and the feed source horn is close to the other side of the semi-arc sleeve 1 opposite to the side plate 2. A distance of 3 to 30 mm is reserved between the top surface of the semi-arc sleeve 1 and the top surface of the feed source, which is specifically determined according to the size and function of the Gregorian double bias antenna. The space is reserved so as not to affect the transmission of the feed source signal, and also to facilitate the heat dissipation of the feed source and the maintenance of maintenance personnel, and at the same time, to provide a routing space for cables and other connecting lines.

[0038] In other small vehicle-mounted antenna projects, this feed support sleeve can be used for X-band, Ka-band and Ku-band feeds, with good technical performance and stable status. At the same time, this feed support sleeve is not only suitable for X-band, Ka-band and Ku-band feeds, but also for the feeds of Gregorian double-bias antennas in other frequency bands.

[0039] Finally, it should be noted that the features mentioned and / or shown in the above description of the exemplary embodiments of the utility model can be combined in the same or similar manner into one or more other embodiments, combined with the features in other embodiments or replace the corresponding features in other implementations. The technical solutions obtained by these combinations or replacements should also be deemed to be included in the protection scope of the utility model.

Claims

1. A feed support sleeve suitable for a vehicle-mounted Gregorian double-bias antenna, characterized in that: The feed support sleeve is installed at the feed phase center of the Gregorian double-bias antenna, and the feed support sleeve includes: A semi-arc sleeve, wherein the semi-arc sleeve is hollow inside and has one side and a bottom that are open; A side plate, the side plate is installed at the side opening of the semi-arc sleeve and is fixedly connected to the top surface and the vertical side surface of the semi-arc sleeve respectively, and is provided with an interface for electrical connection; The support sleeve bottom plate is installed at the bottom opening of the semi-arc sleeve and is respectively perpendicular and fixedly connected to the vertical side surface of the semi-arc sleeve and the bottom of the side plate; Among them, the semi-arc sleeve, the side plate and the support sleeve bottom plate form an enclosed space, the feed support sleeve is detachably installed at the feed phase center of the Gregorian double offset antenna through the support sleeve bottom plate, and the side plate is close to the main reflection surface of the Gregorian double offset antenna, the other side of the semi-arc sleeve opposite to the side plate is close to the secondary reflection surface of the Gregorian double offset antenna, the feed source is installed on the support sleeve bottom plate, and the feed source outlet is close to the side plate, and the feed horn is close to the other side of the semi-arc sleeve opposite to the side plate.

2. The feed support sleeve according to claim 1, characterized in that: The top surface of the semi-arc sleeve is a two-stage flat-top arch structure with different curvatures, wherein the arch radius of the flat-top arch structure close to the main emitting surface of the Gregorian double-offset antenna is 295-296 mm; The arch radius at the lower end of another flat-top arch structure close to the secondary reflector of the Gregorian double-offset antenna is 183-184 mm, and the arch radius at the higher end is consistent with the arch radius of the flat-top arch structure close to the secondary reflector of the Gregorian double-offset antenna, and the arch radius from the lower end to the high end is evenly transitioned.

3. The feed support sleeve according to claim 2, characterized in that: The distance between the top surface of the semi-arc sleeve and the top surface of the feed source is 3 to 30 mm.

4. The feed support sleeve according to claim 1, characterized in that: A first sealing groove is provided on the fixed connection surface between the support sleeve bottom plate, the vertical side surface of the semi-arc sleeve and the bottom of the side plate, and a sealing gasket is installed in the first sealing groove.

5. The feed support sleeve according to claim 1, characterized in that: The inner ring of the interface of the side plate is provided with a second sealing groove, and a sealing ring is installed in the second sealing groove.

6. The feed support sleeve according to claim 1, characterized in that: The semi-arc sleeve is made of glass fiber reinforced plastic.

7. The feed support sleeve according to claim 1, characterized in that: The side panels and the support sleeve bottom plate are made of metal.

8. The feed support sleeve according to claim 1, characterized in that: The semi-arc sleeve, the side plate and the support sleeve bottom plate are fixedly installed with each other by screws or bolts.

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