Circularly polarized radiation unit

Abstract

A circularly polarized radiation unit comprises an oscillator, a feed core and a feed substrate, and the oscillator comprises four oscillator arms with triangular vertical projection planes on the feed substrate; radiating unit arms extending downwards are arranged at the ends, away from the symmetric center, of the oscillator arms, the ends, close to the symmetric center, of the oscillator arms are connected with a feed substrate through metal columns, a feed circuit is arranged on the feed substrate, and the oscillator arms are communicated with the feed circuit through feed cores; the feed substrate is provided with a plurality of decoupling isolation columns. According to the utility model, the radiation unit arms are arranged at the tail ends of the four centrosymmetric oscillator arms, so that the bandwidth of the radiation unit is effectively broadened while the radiation aperture of the radiation unit is reduced; the metal columns are arranged on the periphery of the oscillator, the coupling degree between radiations is removed through the metal columns, the out-of-roundness of the radiation unit is improved, and therefore the out-of-roundness of a whole antenna array directional diagram is improved. The feed core and the oscillator arm are fixed through welding, and the feed core of the radiation unit does not need to be supported by a plastic part and the like, so that the requirement of the antenna in a ground rail environment is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to antenna and communication technical field, especially a kind of circular polarization radiating element. BACKGROUND

[0002] With the rapid development of information technology, low-orbit satellite communication technology, as an important part of modern communication field, is undergoing unprecedented changes. As a key component in satellite communication system, the performance of low-orbit satellite antenna directly affects the quality and efficiency of the entire communication system. Therefore, the research and innovation of low-orbit satellite antenna technology are particularly important.

[0003] Radiating element is a basic structural unit in antenna design, and its main function is to effectively radiate or receive radio waves. As a basic component of antenna system, the design and optimization of radiating element are crucial to the realization of high-performance wireless communication system.

[0004] However, the radiating elements used in low-orbit satellite antennas currently have the problems of high inter-array coupling, poor circularity of radiating elements and poor structural stability.

[0005] Therefore, in view of the deficiencies of the prior art, it is necessary to design a circular polarization radiating element to solve the above problems.

[0006] It should be noted that the above introduction to the technical background is only to facilitate a clear and complete description of the technical scheme of the utility model, and to facilitate the understanding of those skilled in the art, and the above content cannot be considered as known by those skilled in the art because these contents are described in the background of the utility model. CONTENT OF THE UTILITY MODEL

[0007] In order to overcome the deficiencies of the prior art, the utility model aims to disclose a circular polarization radiating element, which is used to solve the problems of high inter-array coupling, poor circularity and poor structural stability of radiating elements in low-orbit satellite antennas.

[0008] The utility model discloses a circular polarization radiating element, which comprises a vibrator, a feed core and a feed substrate, the vibrator comprises four vibrator arms with triangular vertical projection faces on the feed substrate, and the sharp corners of the vibrator arms are inwardly opposite to each other to form a central symmetric structure; one end of each vibrator arm away from the symmetry center is provided with a downward extending radiating element arm, and one end of each vibrator arm close to the symmetry center is connected with the feed substrate through a metal column; the feed substrate is provided with a feed circuit, and the oppositely arranged vibrator arms are connected with the feed circuit through the feed core to complete the feed; a plurality of decoupling isolation columns are arranged on the feed substrate, and the decoupling isolation columns are uniformly arranged in a circular ring shape around the vibrator.

[0009] The length of the diagonal of the upper end face of the oscillator is 0.4 lambda, the height of the oscillator is 0.25 lambda, the extension length of the radiation unit arm is 0.13 lambda, and lambda is the central wavelength of the radiation unit.

[0010] The radiation unit arm is any one of a triangle, a square and a rhombus.

[0011] The decoupling isolation column is made of metal.

[0012] The height of the decoupling isolation column is 0.1 lambda.

[0013] The shape of the decoupling isolation column is any one of a cylinder and a prism.

[0014] The feeding core and the oscillator arm are fixed by welding, and a plastic piece or the like is not needed to support the feeding core of the radiation unit, so as to adapt to the requirement of the antenna in the ground track environment.

[0015] The material process of the oscillator is any one of die casting, PCB, plastic electroplating and sheet metal.

[0016] Thanks to the above technical scheme, the circularly polarized radiation unit has the following beneficial effects compared with the prior art.

[0017] The circularly polarized radiation unit comprises four oscillators arranged in a circle, and a radiation unit arm is arranged at the end of each oscillator arm. BRIEF DESCRIPTION OF DRAWINGS

[0018] To make the technical scheme of the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the specific embodiments or the prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are some embodiments of the present application, and other accompanying drawings can be obtained by those skilled in the art without any creative effort based on these accompanying drawings.

[0019] Figure 1 It is a structural schematic view of the circularly polarized radiation unit.

[0020] Figure 2 It is an exploded view of the circularly polarized radiation unit.

[0021] Figure 3The utility model discloses a top view of circular polarization radiating unit.

[0022] In the above drawings, 1, oscillator; 11, oscillator arm; 12, radiating unit arm; 13, metal column; 2, feed core; 3, feed substrate; 31, feed circuit; 4, decoupling isolation column. DETAILED DESCRIPTION

[0023] The following specific embodiments illustrate the embodiments of the utility model, and those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification.

[0024] It should be noted that the terms "first", "second" and the like in the description and claims of the application and the above drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so as to describe the embodiments of the application herein. In addition, the terms "include" and "have" and their synonyms, 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 have to be limited 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", "inner", "outer", "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 utility model 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] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned part of the terms may also be used to indicate other meanings, for example, the term "up" may also be used to indicate a certain dependent relationship or connection relationship in some cases. For ordinary skilled persons in the art, the specific meaning of these terms in the utility model can be understood according to the specific circumstances.

[0027] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," "fitting," and "fitting" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Similarly, "fitting" can mean completely or partially fitted. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[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] Example:

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a circularly polarized radiation unit, including an oscillator 1, a feed core 2, and a feed substrate 3. The diagonal length of the upper end face of the oscillator 1 is 0.4λ, and the height of the oscillator 1 is 0.25λ. The oscillator 1 includes four oscillator arms 11, each with a triangular vertical projection surface on the feed substrate 3. The spicules of the oscillator arms 11 are arranged in pairs facing inward to form a centrally symmetrical structure. Each oscillator arm 11 has a downwardly extending radiation unit arm 12 at the end away from the center of symmetry. The extension length of the radiation unit arm 12 is 0.13λ. The end of the oscillator arm 11 near the center of symmetry is connected to the feed substrate 3 through a metal pillar 13. The feed substrate 3 is provided with a feed circuit 31. The oppositely arranged oscillator arms 11 are connected to the feed circuit 31 through the feed core 2 to complete the feeding. The feed substrate 3 is also provided with a number of metal decoupling isolation pillars 4. The height of the decoupling isolation pillars 4 is 0.1λ. The decoupling isolation pillars 4 are evenly arranged in a circular ring on the outer periphery of the oscillator 1, where λ is the center wavelength of the radiation unit. It should be noted that the radiating unit arm 12 can be any of the following shapes: triangular, square, and rhomboid; the decoupling isolation column 4 can be any of the following shapes: cylindrical and prismatic.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, furthermore, in order to improve the functional stability of the radiation unit, the feed core 2 and the vibrator arm 11 are fixed by welding, eliminating the need for plastic parts or other supports for the feed core of the radiation unit, ensuring the reliability of the connection between the feed core 2 and the vibrator arm 11, and adapting to the requirements of the low-altitude orbit operating environment.

[0032] like Figure 1 , Figure 2 and Figure 3As shown, further, to ensure the performance stability of the radiation unit, the material process of the vibrator 1 is any one of die casting, PCB, plastic plating and sheet metal, and in the embodiment, the vibrator 1 is preferably selected to be of the die casting material to reduce the cost.

[0033] The circular polarization radiation unit has the characteristics of small shape, low coupling degree between arrays, and excellent array non-circularity, and has a simple structure and low molding cost, and can effectively reduce the network deployment and operation cost of operators.

[0034] Finally, it should be noted that the above is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical scheme recorded in the foregoing embodiments can still be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A circularly polarized radiating element comprising a dipole (1), a feed core (2) and a feed substrate (3), characterized in that: The vibrator (1) includes four vibrator arms (11) with triangular vertical projection faces on the feeding substrate (3), the sharp corners of the vibrator arms (11) oppositely form a center-symmetrical structure, the ends of the vibrator arms (11) away from the center are provided with downward extending radiation unit arms (12), the ends of the vibrator arms (11) close to the center are connected with the feeding substrate (3) through metal columns (13), the feeding substrate (3) is provided with a feeding circuit (31), the oppositely arranged vibrator arms (11) are in communication with the feeding circuit (31) through feeding cores (2) to complete feeding, the feeding substrate (3) is further provided with a plurality of decoupling isolation columns (4), the decoupling isolation columns (4) are circularly and uniformly arranged at the outer periphery of the vibrator (1).

2. The circularly polarized radiating element of claim 1, wherein: The diagonal length of the upper end face of the vibrator (1) is 0.4λ, the height of the vibrator (1) is 0.25λ, the extension length of the radiation unit arm (12) is 0.13λ, and λ is the center wavelength of the radiation unit.

3. The circularly polarized radiating element of claim 2, wherein: The radiation unit arm (12) is any one of a triangle, a square and a rhombus.

4. The circularly polarized radiating element of claim 1, wherein: The decoupling isolation column (4) is made of metal.

5. The circularly polarized radiating element of claim 4, wherein: The height of the decoupling isolation column (4) is 0.1λ.

6. A circularly polarized radiating element according to claim 5, wherein: The shape of the decoupling isolation column (4) is any one of a cylinder and a prism.

7. The circularly polarized radiating element of claim 1, wherein: The feeding core (2) and the vibrator arm (11) are fixed by welding.

8. The circularly polarized radiating element of claim 1, wherein: The material of the vibrator (1) is any one of die casting, PCB, plastic plating and sheet metal.

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