Miniaturized cap-type feed source antenna structure

Abstract

The utility model discloses a miniaturized cap type feed source antenna structure, which comprises a main reflecting plate, a rotation driving piece and a polarizer assembly, the polarizer assembly is fixedly arranged at the bottom of the main reflecting plate, the top of the main reflecting plate is fixedly connected with a main connecting waveguide, the top of the main connecting waveguide is fixedly connected with an auxiliary surface supporting piece, and the auxiliary surface supporting piece is fixedly connected with an auxiliary surface. A metal coating is arranged at the top of the secondary surface supporting piece; the polarizer assembly comprises a polarizer body and a transmission assembly, and the polarizer body is connected with the rotation driving part through the transmission assembly; the polarizer body is directly driven by rotating the driving piece, polarization switching is achieved without rotating the whole feed source network, switching is quicker and more sensitive, power consumption of a satellite is greatly reduced, in addition, a metal coating is arranged on the auxiliary face supporting piece to replace a traditional metal auxiliary reflection face, and the antenna is more compact. The shielding range of the auxiliary reflecting surface is reduced, and the reliability of the antenna is ensured.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of antennas, in particular to a miniaturized cap-type feed antenna structure. BACKGROUND

[0002] Under the background of the era of all things interconnected and all things intelligent, the capacity of high-throughput satellite systems is rapidly improving. Traditional high-throughput antennas are mostly in the form of ring-focus parabolic surfaces. Due to the large shielding of the secondary reflector, the first side lobe is often high, the aperture efficiency is reduced, and the polarization switching also mostly needs to rotate the entire feed network by a driving device to realize polarization switching. In emergency rescue and signal coverage-free occasions, the large volume and weight of the antenna greatly reduce the user experience. The market demand for small and light antennas is extremely urgent under the promotion of all things interconnected.

[0003] Therefore, the inventor has a need to design a new miniaturized antenna structure to overcome the above problems. SUMMARY

[0004] The main purpose of the application is to provide a miniaturized cap-type feed antenna structure to solve the problems of large shielding of the secondary reflector, difficult polarization switching, large satellite volume and large mass in the related art.

[0005] In order to achieve the above purpose, the application provides a miniaturized cap-type feed antenna structure, which comprises a main reflector plate, a rotating driving part and a polarizer assembly. The polarizer assembly is fixedly installed at the bottom of the main reflector plate. The top of the main reflector plate is fixedly connected with a main connecting waveguide. The top of the main connecting waveguide is fixedly connected with a secondary surface support. The top of the secondary surface support has a metal plating layer. The polarizer assembly comprises a polarizer body and a transmission assembly. The polarizer body and the rotating driving part are connected through the transmission assembly.

[0006] Optionally, the polarizer assembly further comprises a polarizer shell and a polarizer base. The polarizer base is fixedly connected with the bottom of the main reflector plate. The polarizer shell is fixedly connected at the bottom of the polarizer base. The polarizer body is fixedly arranged in the interior of the polarizer shell.

[0007] Optionally, the transmission assembly comprises a driving gear and a driven gear. The driving gear is fixedly connected with the output shaft of the rotating driving part. The driven gear is transmissionally connected between the driving gear and the polarizer body.

[0008] Optionally, the polarizer assembly further comprises a square-round transition piece and a polarization connector, one end of the square-round transition piece is connected with the polarizer base bearing, the other end of the square-round transition piece is fixedly connected with one end of the polarizer body, the other end of the polarizer body is fixedly connected with one end of the polarization connector, and the other end of the polarization connector is connected with the polarizer shell bearing.

[0009] Optionally, the driven gear is sleeved on the outer periphery of the square-round transition piece, and the square-round transition piece, the driven gear and the polarizer body are fixedly connected through bolts.

[0010] Optionally, the material of the sub-face support is cross-linked polystyrene.

[0011] Optionally, the polarizer body is a baffle polarizer.

[0012] Optionally, the main reflector plate adopts a honeycomb structure, and the material of the main reflector plate is carbon fiber.

[0013] Optionally, the material of the main connection waveguide is aluminum alloy.

[0014] Optionally, the polarizer body and the polarization connector are fixedly connected through bolts.

[0015] The small-sized cap-shaped feed source antenna structure provided by the utility model has the advantages that, compared with the prior art, the small-sized cap-shaped feed source antenna structure has the advantages that:

[0016] I. The polarizer body is directly driven by rotating the driving member, the polarization switching is realized without rotating the entire feed source network, the switching is more rapid and sensitive, the power consumption of the satellite is greatly reduced, and the metal plating layer arranged on the sub-face support replaces the traditional metal sub-reflector, so that the shielding range of the sub-reflector is reduced and the reliability of the antenna is ensured.

[0017] II. The baffle polarizer combines the circular polarizer and the orthogonal mode coupler into one, and compared with the traditional polarization switching mode, the space is reduced by more than 60%.

[0018] III. The micro high-precision steering engine replaces the traditional motor driving switching mode, the power consumption is reduced by more than 80%, the position resolution is as high as 0.05°, and the high-precision polarization switching of the polarization mode can be completely met. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings constituting a part of the present application are used to provide a further understanding of the present application, so that other features, objects and advantages of the present application become more apparent. The illustrative embodiment drawings of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1It is the overall structure diagram of the utility model;

[0021] Figure 2 It is the overall structure diagram of the utility model Figure 1 The structure enlarged view of A in the middle

[0022] 1, main reflection plate; 2, rotating driving part; 3, main connecting waveguide; 4, auxiliary surface support; 5, polarizer body; 6, polarizer shell; 7, polarizer base; 8, driving gear; 9, driven gear; 10, square-circle transition piece; 11, polarization connecting piece. DETAILED DESCRIPTION

[0023] In order to make the person in the art better understand the present application scheme, the technical scheme in the present application embodiment will be clearly and completely described below in conjunction with the drawings in the present application embodiment, obviously, the described embodiment is only a part of the embodiment of the present application, not all. Based on the embodiment in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0024] It should be noted that the terms "first", "second" and the like in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0025] In the present application, the terms "up", "down", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0026] And, in addition to being used to indicate the orientation or positional relationship, the above-mentioned part of the term can also be used to indicate other meanings, for example, the term "up" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For the person skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific situation.

[0027] In addition, the term "multiple" should mean two or more.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] like Figure 1 , Figure 2 As shown, a miniaturized cap-shaped feed antenna structure includes a main reflector 1, a rotation drive 2, and a polarizer assembly. The polarizer assembly is fixedly installed at the bottom of the main reflector 1. A main connecting waveguide 3 is fixedly connected to the top of the main reflector 1, and a sub-face support 4 is fixedly connected to the top of the main connecting waveguide 3. The top of the sub-face support 4 has a metal plating. The polarizer assembly includes a polarizer body 5 and a transmission assembly. The polarizer body 5 and the rotation drive 2 are connected through the transmission assembly. The polarizer body 5 is a partition polarizer. The main reflector 1 adopts a honeycomb structure and is made of carbon fiber. The sub-face support 4 is made of cross-linked polystyrene. The main connecting waveguide 3 is made of aluminum alloy.

[0030] Specifically, the main reflector 1 uses a standard surface curve for its reflective surface, and the rotation drive component 2 uses a high-precision servo motor. This high-precision servo motor employs a 12-bit high-precision magnetic encoder with a position resolution of 0.05°, a rated torque of 0.6 N·m, and a maximum speed of 110 rpm, enabling precise and rapid control of the antenna. The secondary surface support component 4 is made of cross-linked polystyrene material with a dielectric constant of 2.8. The top end face uses electroplating instead of the secondary reflector surface, with a first layer of copper plating (10 μm thick) and a second layer of nickel plating (6 μm thick). The bottom uses a threaded design with a pitch of 0.5 mm. The main connecting waveguide 3 is made of high-quality aluminum alloy material with an internal silver plating process. It features a choke groove at the bottom and a threaded design at the top with a pitch of 0.5 mm. The polarizer 12 uses a septum polarizer, combining a circular polarizer and an orthogonal mode coupler into one unit, resulting in a small size, low axial ratio, and light weight. In this embodiment, the polarizer body 5 is directly driven by the rotating drive component 2, without rotating the entire feed network to achieve polarization switching. The switching is faster and more sensitive, and the power consumption of the satellite is greatly reduced. In addition, a metal coating is set on the sub-reflector 4 to replace the traditional metal sub-reflector, which reduces the obstruction range of the sub-reflector and ensures the reliability of the antenna.

[0031] The polarizer assembly further comprises a polarizer shell 6 and a polarizer base 7, the polarizer base 7 is fixedly connected with the bottom of the main reflector plate 1, the polarizer shell 6 is fixedly connected at the bottom of the polarizer base 7, and the polarizer body 5 is fixedly arranged inside the polarizer shell 6. Specifically, the polarizer shell 6 is used to contain the polarizer body 5 and other components, and the polarizer base 7 is used to mount the entire polarizer.

[0032] The transmission assembly comprises a driving gear 8 and a driven gear 9, the driving gear 8 is fixedly connected with the output shaft of the rotary drive 2, and the driven gear 9 is drivingly connected between the driving gear 8 and the polarizer body 5. Specifically, when switching the polarization mode, the high-precision steering engine controls the driving gear 8 to drive the driven gear 9, and then drives the polarizer body 5 to rotate to realize the switching of the polarization mode.

[0033] The polarizer assembly further comprises a square-to-round transition piece 10 and a polarization connecting piece 11, one end of the square-to-round transition piece 10 is bearingly connected with the polarizer base 7, the other end of the square-to-round transition piece 10 is fixedly connected with one end of the polarizer body 5, the other end of the polarizer body 5 is fixedly connected with one end of the polarization connecting piece 11, and the other end of the polarization connecting piece 11 is bearingly connected with the polarizer shell 6. Specifically, the polarizer body 5 is mounted between the square-to-round transition piece 10 and the polarization connecting piece 11, the square-to-round transition piece 10 is used to connect the waveguide and the polarizer body 5, and the polarization connecting piece 11 is used to connect the polarizer body 5 and the feed source. Since the square-to-round transition piece 10 and the polarization connecting piece 11 will rotate together with the driven gear 9, they are respectively bearingly connected with the polarizer base 7 and the polarizer shell to ensure smooth rotation.

[0034] The driven gear 9 is sleeved on the outer periphery of the square-to-round transition piece 10, and the square-to-round transition piece 10, the driven gear 9 and the polarizer body 5 are fixedly connected by bolts. The polarizer body 5 and the polarization connecting piece 11 are fixedly connected by bolts. Specifically, in addition to the bolt connection mode, other fixed connection modes can also be applied here, as long as the mode that can fixedly connect the square-to-round transition piece 10, the polarizer body 5 and the polarization connecting piece 11 together can be applied here.

[0035] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A miniaturized cap-feed antenna structure, characterized by: The utility model relates to a polarization device, including main reflector plate (1), rotation drive part (2) and polarizer assembly, polarizer assembly fixed mounting at the bottom of main reflect plate (1), the top of main reflector plate (1) is fixedly connected with main connecting waveguide (3), the top of main connecting waveguide (3) is fixedly connected with vice face support (4), the top of vice face support (4) has metal plating layer, The polarizer assembly includes a polarizer body (5) and a transmission assembly, and the polarizer body (5) and the rotation drive part (2) are connected through the transmission assembly.

2. A miniaturized cap-feed antenna structure as claimed in claim 1, characterized in that: The polarizer assembly further includes a polarizer housing (6) and a polarizer base (7), the polarizer base (7) is fixedly connected with the bottom of the main reflector plate (1), the polarizer housing (6) is fixedly connected at the bottom of the polarizer base (7), and the polarizer body (5) is fixedly arranged in the polarizer housing (6).

3. A miniaturized cap-feed antenna structure as claimed in claim 2, characterized in that: The transmission assembly includes a drive gear (8) and a driven gear (9), the drive gear (8) is fixedly connected with the output shaft of the rotation drive part (2), and the driven gear (9) is drivingly connected between the drive gear (8) and the polarizer body (5).

4. A miniaturized cap-feed antenna structure as claimed in claim 3, characterized in that: The polarizer assembly further includes a square-to-round transition piece (10) and a polarization connecting piece (11), one end of the square-to-round transition piece (10) is bearing-connected with the polarizer base (7), the other end of the square-to-round transition piece (10) is fixedly connected with one end of the polarizer body (5), the other end of the polarizer body (5) is fixedly connected with one end of the polarization connecting piece (11), and the other end of the polarization connecting piece (11) is bearing-connected with the polarizer housing (6).

5. A miniaturized cap-feed antenna structure as claimed in claim 4, characterized in that: The driven gear (9) is sleeved on the outer periphery of the square-to-round transition piece (10), and the square-to-round transition piece (10), the driven gear (9), and the polarizer body (5) are fixedly connected through bolts.

6. A miniaturized cap-feed antenna structure as claimed in claim 1, characterized in that: The material of the vice face support (4) includes cross-linked polystyrene.

7. A miniaturized cap-feed antenna structure as claimed in claim 1, characterized in that: The polarizer body (5) is a baffle polarizer.

8. A miniaturized cap-feed antenna structure as claimed in claim 1, characterized in that: The main reflector plate (1) adopts a honeycomb structure, and the material of the main reflector plate (1) is carbon fiber.

9. A miniaturized cap-feed antenna structure as claimed in claim 1, characterized in that: The material of the main connecting waveguide (3) includes aluminum alloy.

10. A miniaturized cap-feed antenna structure as claimed in claim 4, characterized in that: The polarizer body (5) and the polarization connecting piece (11) are fixedly connected through bolts.

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