Miniaturized Beidou navigation anti-interference array antenna

Abstract

The utility model belongs to the related technical field of satellite navigation antennas, and discloses a miniaturized Beidou navigation anti-interference array antenna, which comprises an array antenna shell, a plurality of array antenna elements, a radio frequency channel cavity, an SMA (Shape Memory Alloy) type radio frequency interface, a radio frequency channel printed board and an antenna cover, the plurality of antennas are dispersedly arranged at the upper part of the array antenna shell; the radio frequency channel cavity is fixed in the array antenna shell and is in fit connection with each array antenna element; the SMA type radio frequency interface is arranged on the back surface of the array antenna shell and is in signal connection with the radio frequency channel cavity through a cable; in addition, the radio frequency channel printed board is fixedly installed in the radio frequency channel cavity, and the antenna housing is used for covering the whole array antenna element therein. Compared with the prior art, the utility model has the advantages that the anti-interference performance is more excellent, the number of cables is reduced as much as possible, the structure is simple, the installation is convenient, the amplitude and phase consistency of each channel is good, and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field related to satellite navigation antennas, and more specifically, relates to a miniaturized Beidou navigation anti-interference array antenna. Background Art

[0002] The Beidou navigation system is a geosynchronous satellite with weak signals, which is very susceptible to interference. Therefore, many antenna arrays with multiple antennas integrated together have appeared to resist interference.

[0003] The search found that most antennas in the prior art interconnect antenna elements, low-noise amplifier RF channels, and output ports through two-stage cables. This makes the entire antenna size larger and has problems such as phase consistency and gain consistency that are difficult to control.

[0004] Accordingly, this field urgently needs to make further research and improvements in this regard to better meet the Beidou navigation anti-interference requirements under various complex conditions. Utility Model Content

[0005] In view of the above defects or improvement needs of the prior art, the purpose of the utility model is to provide a miniaturized Beidou navigation anti-interference array antenna, wherein by redesigning the structural composition of the entire array antenna and the setting method of some key modules, and rationally planning the layout positions of multiple array elements, a Beidou navigation array antenna with better anti-interference performance and more miniaturization can be obtained, which also has the advantages of simple structure, easy installation, and good amplitude and phase consistency of each channel.

[0006] To achieve the above object, according to the utility model, a miniaturized Beidou navigation anti-interference array antenna is provided, characterized in that the array antenna comprises an array antenna housing, an array antenna element, a radio frequency channel cavity, an SMA type radio frequency interface, a radio frequency channel printed circuit board and a radome, wherein:

[0007] The number of the array antenna elements is multiple, and they are dispersedly arranged on the upper part of the array antenna housing;

[0008] The radio frequency channel cavity is fixed inside the array antenna housing and is closely connected with each of the array antenna elements;

[0009] The SMA type radio frequency interface is arranged on the back of the array antenna housing and is connected to the radio frequency channel cavity through a cable to maintain signal connection;

[0010] The radio frequency channel printed circuit board is fixedly installed inside the radio frequency channel cavity; the antenna cover is connected to the array antenna shell and is used to cover the array antenna element as a whole therein.

[0011] Further preferably, the number of the array antenna elements is seven, and all of them are B3 satellite navigation antennas.

[0012] Further preferably, the array antenna elements are arranged in the following manner: one of them is arranged in the center, and the remaining six are evenly and circumferentially dispersed around it.

[0013] Further preferably, the array antenna elements are made of a material with a high dielectric constant.

[0014] Further preferably, the RF channel cavity is closely connected to the array antenna element by means of connector plug-in.

[0015] Further preferably, the SMA type radio frequency interface is connected to the radio frequency channel cavity signal using a semi-flexible phase-stable cable with a consistent length.

[0016] Further preferably, the antenna cover is made of fiberglass.

[0017] In general, compared with the prior art, the above technical scheme conceived by the utility model redesigns the structural composition of the entire array antenna and some key modules such as the setting method of the array antenna elements, which not only significantly optimizes the size of the whole machine, but also improves the performance of the entire Beidou navigation antenna, and better meets the anti-interference function of the whole machine; in addition, the overall thickness and weight of the array antenna are reduced, and the signal transmission between the array antenna elements and the RF channel cavity can be achieved by plug-in, which further facilitates the installation and optimizes the phase gain consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram for demonstrating the main structure of the miniaturized Beidou navigation anti-interference array antenna according to the utility model;

[0019] Figure 2 It is a schematic diagram of the arrangement of array antenna elements according to a preferred embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the layout of the radio frequency channel printed circuit board according to another preferred embodiment of the utility model;

[0021] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0022] 1-array antenna shell; 2-array antenna element; 3-RF channel cavity; 4-SMA type RF interface; 5-RF channel printed circuit board; 6-radome. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] It should also be noted that, in the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] It should also be noted that, in the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] Figure 1 It is a schematic diagram for demonstrating the main structure of the miniaturized Beidou navigation anti-interference array antenna according to the utility model. Figure 1 As shown in the figure, the array antenna mainly includes array antenna shell 1, array antenna element 2, RF channel cavity 3, SMA type RF interface 4, RF channel printed circuit board 5 and antenna cover 6 and other components, which will be explained in detail one by one below.

[0029] There are multiple array antenna elements 2, which are dispersedly arranged on the upper part of the array antenna housing 1 and can be fixed to the array antenna housing 1 by screws, for example. The antenna cover 6 is connected to the array antenna housing 1 and is used to cover the array antenna element 2 as a whole.

[0030] More specifically, according to a preferred embodiment of the present utility model, the number of the array antenna elements 2 is preferably designed to be seven, and all of them are B3 satellite navigation antennas.

[0031] See also Figure 2 The layout of these array antenna elements is preferably designed as follows: one is arranged in the center, and the other six are evenly distributed around it. Through the above arrangement of seven elements, it can be known through simulation software that a relatively optimal layout can be achieved, thereby optimizing the size and performance of the whole machine. In addition, according to another preferred embodiment of the utility model, these array antenna elements can be made of materials with high dielectric constants, thereby further reducing the thickness of the elements and reducing the weight.

[0032] As for the RF channel cavity 3, it is arranged inside the array antenna housing 1, and can be fixed by screws, for example, and is closely connected with each array antenna element 2. In addition, a plurality of RF channel printed boards 5 are installed inside the RF channel cavity 3, and can be fixed by screws, for example.

[0033] As for the SMA type radio frequency interface 4, it is arranged on the back side of the array antenna housing 1 and maintains signal connection with the radio frequency channel cavity 3 through a cable.

[0034] More specifically, according to another preferred embodiment of the present invention, the RF channel cavity 3 is connected to the array antenna element 2 by a connector plug-in method. According to another preferred embodiment of the present invention, the cable can preferably be a semi-flexible phase-stable cable, and its length is guaranteed to be consistent.

[0035] In order to achieve the above purpose, the first thing to do is to customize a hole-type connector that is soldered on the printed circuit board and can extend from the top of the RF channel cavity, and the characteristic impedance is also required to be 50 ohms. Then the array element needs to customize an inner conductor of suitable length and diameter to plug into the RF channel cavity. And because the plug-in requires a specific RF signal entry position, when designing the RF board, it is necessary to give priority to the position of the connector, and then use other means to wind the layout of the signal transmission direction. After verification by temperature cycle and vibration tests, it is confirmed that this pinhole plug-in form has high reliability and will not cause the signal to decrease during the test. In addition, because the cable uses a phase-stable cable and ensures that the lengths of the seven cables are consistent, the phase consistency between channels can be further ensured.

[0036] See also Figure 3 , shows a schematic diagram of the layout of the radio frequency channel printed board of the preferred embodiment of the utility model. These channels can use suitable plates, and the appropriate microstrip line width and dielectric thickness are obtained through simulation calculation to ensure a characteristic impedance of 50 ohms.

[0037] In summary, the miniaturized Beidou navigation anti-interference array antenna according to the utility model is redesigned in terms of its structural composition and the setting of some key modules, which not only makes the anti-interference performance better and minimizes the number of cables, but also has the characteristics of simple structure, convenient installation, and good amplitude and phase consistency of each channel. Therefore, it is particularly suitable for Beidou navigation applications under various complex conditions.

[0038] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. For those skilled in the art, it is understood that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A miniaturized Beidou navigation anti-interference array antenna, characterized in that: The array antenna comprises an array antenna housing (1), an array antenna element (2), a radio frequency channel cavity (3), an SMA type radio frequency interface (4), a radio frequency channel printed board (5) and a radome (6), wherein: The number of the array antenna elements (2) is multiple, and they are dispersedly arranged on the upper part of the array antenna housing (1); The radio frequency channel cavity (3) is fixed inside the array antenna housing (1) and is closely connected to each of the array antenna elements (2); The SMA type radio frequency interface (4) is arranged on the back side of the array antenna housing (1) and is signal-connected to the radio frequency channel cavity (3) via a cable; The radio frequency channel printed circuit board (5) is fixedly mounted inside the radio frequency channel cavity (3); the antenna cover (6) is connected to the array antenna housing (1) and is used to cover the array antenna element (2) as a whole therein.

2. A miniaturized Beidou navigation anti-interference array antenna as claimed in claim 1, characterized in that: The number of the array antenna elements (2) is seven, and all of them are B3 satellite navigation antennas.

3. A miniaturized Beidou navigation anti-interference array antenna as described in claim 2, characterized in that: The array antenna elements (2) are arranged in the following manner: one of them is arranged in the center, and the remaining six are evenly dispersed around it in a circumferential direction.

4. A miniaturized Beidou navigation anti-interference array antenna as claimed in claim 3, characterized in that: The array antenna element (2) is made of a material with a high dielectric constant.

5. A miniaturized Beidou navigation anti-interference array antenna as described in any one of claims 1 to 4, characterized in that: The radio frequency channel cavity (3) is closely connected to the array antenna element (2) by means of connector plug-in.

6. A miniaturized Beidou navigation anti-interference array antenna as claimed in claim 5, characterized in that: The SMA type radio frequency interface (4) is connected to the radio frequency channel cavity (3) by means of a semi-flexible phase-stable cable with a consistent length.

7. A miniaturized Beidou navigation anti-interference array antenna as claimed in claim 6, characterized in that: The antenna cover (6) is made of glass fiber reinforced plastic.

Images