A high phase center stability antenna array

Abstract

The utility model discloses a kind of high phase center stability antenna array, belong to antenna technical field, including antenna main body and virtual element antenna unit, virtual element antenna unit is set on antenna main body, antenna main body includes ground plate and radiating unit, radiating unit is installed on ground plate top, around radiating unit four, along ground plate edge, 6 virtual element antenna units are evenly symmetrical and installed, antenna main body adopts low profile antenna, low profile antenna appearance is thin, easy to conformal and integration, with light weight, low cost, high reliability, durability and design flexible simultaneously Advantage, virtual element antenna unit also adopts low profile antenna, after low profile antenna increases virtual element, the phase center stability performance of phase pattern is improved, converted to the positioning accuracy of antenna in navigation positioning signal is improved, under the condition of low profile low cost, meet the demand of high-precision satellite positioning.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and more specifically, to an antenna array with high phase center stability. Background Technology

[0002] With the development of wireless positioning technology, the application of antenna technology is becoming more and more widespread. The antenna is located at the front end of the wireless positioning system and is the carrier of information reception. The antenna can convert spatial electromagnetic wave signals into electrical signals. The amplitude, phase and other information of the electrical signals are the measurement values ​​required by the positioning system.

[0003] To achieve high-precision positioning, a high-precision antenna is required. However, due to the physical size of the antenna, it is impossible for the antenna to achieve phase center alignment, which will affect the accuracy of satellite positioning. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide an antenna array with high phase center stability, which aims to solve the problems mentioned in the background art.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A high phase center stability antenna array, comprising:

[0007] Antenna body; and

[0008] Multiple virtual element antenna elements are evenly installed on the antenna body.

[0009] In a preferred embodiment of this utility model, the antenna body includes a ground plane and a radiating element, wherein the radiating element is mounted on top of the ground plane.

[0010] In a preferred embodiment of the present invention, the radiating unit includes a dielectric substrate A and a radiating patch A, wherein the dielectric substrate A is mounted on the top of the ground plane and the radiating patch A is mounted on the top of the dielectric substrate A.

[0011] In a preferred embodiment of this invention, the number of virtual element antenna units is 3-8.

[0012] In a preferred embodiment of the present invention, each of the virtual element antenna units includes a dielectric substrate B and a radiating patch B, each of the dielectric substrate B is mounted on top of the ground plane, and each of the radiating patches B is mounted on top of the dielectric substrate B.

[0013] As a preferred embodiment of this invention, each of the virtual element antenna units is connected to a 50-ohm load.

[0014] Beneficial effects

[0015] Compared with existing technologies, this invention provides an antenna array with high phase center stability, which has the following advantages:

[0016] 1. In this scheme, the main body of the antenna adopts a low-profile antenna. The low-profile antenna is thin and easy to conform and integrate. It also has the advantages of light weight, low cost, high reliability, durability and flexible design. The virtual element antenna unit also adopts a low-profile antenna. After adding virtual elements to the low-profile antenna, the phase center stability performance of the phase pattern is improved. This translates to an improvement in the positioning accuracy of the antenna in navigation and positioning signals. Under the conditions of low profile and low cost, the requirements of high-precision satellite positioning are met.

[0017] 2. In this scheme, each virtual element antenna unit consists of a dielectric substrate B and a radiating patch B. The dielectric substrate B provides mechanical support for the radiating patch B, preventing short circuits between the radiating patch B and the ground plane. The virtual element antenna unit and the radiating unit adopt the same or similar structure, which helps to save costs. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present utility model;

[0019] Figure 2 This is a schematic diagram of the antenna body in this utility model;

[0020] Figure 3 This is a schematic diagram of the virtual element antenna unit in this utility model.

[0021] Explanation of the labels in the diagram:

[0022] 1. Antenna body; 2. Ground plane; 3. Radiation element; 301. Dielectric substrate A; 302. Radiation patch A; 4. Virtual element antenna element; 401. Dielectric substrate B; 402. Radiation patch B. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] Example:

[0025] Please see Figures 1-3 A high phase center stability antenna array, comprising:

[0026] Antenna body 1; and

[0027] There are 6 virtual element antenna elements 4, which are evenly installed on the antenna body 1.

[0028] In this embodiment, the antenna body 1 is circular, and six virtual element antenna elements 4 are evenly arranged on a circle centered on the top surface of the antenna body 1. These six virtual element antenna elements are evenly distributed along the edge of the circular ground plane (i.e., the antenna body 1), forming a highly symmetrical spatial layout. This symmetry forces the electromagnetic field distribution of the antenna system to tend towards isotropy, weakening the disturbance of the phase center by local non-uniformity. Although the virtual element antenna elements 4 do not directly participate in signal transmission and reception, their low-profile microstrip structure couples with the main radiating element. Through the synergistic effect of the dielectric substrate B and the radiating patch B, the surface current is guided to flow along a predetermined path, suppressing current distortion caused by mechanical deformation or temperature changes.

[0029] In this embodiment, the antenna body 1 adopts a low-profile antenna. The low-profile antenna is thin and easy to conform and integrate. It also has the advantages of light weight, low cost, high reliability, durability and flexible design. The virtual element antenna unit 4 also adopts a low-profile antenna. After adding virtual elements to the low-profile antenna, the phase center stability performance of the phase pattern is improved. This translates to an improvement in the positioning accuracy of the antenna in navigation and positioning signals. Under the conditions of low profile and low cost, the requirements of high-precision satellite positioning are met.

[0030] Please refer to the specific details. Figure 1 As shown, the antenna body 1 includes a ground plane 2 and a radiating element 3, with the radiating element 3 mounted on top of the ground plane 2.

[0031] In this embodiment, the radiating unit 3 is installed at the top center of the ground plane 2. The ground plane 2 serves as a reflector for the antenna, which can guide the radiated energy unidirectionally to the other side, and at the same time forms a resonant structure with the radiating unit 3.

[0032] Please refer to the specific details. Figures 1-2 As shown, the radiation unit 3 includes a dielectric substrate A301 and a radiation patch A302. The dielectric substrate A301 is mounted on the top of the ground plane 2, and the radiation patch A302 is mounted on the top of the dielectric substrate A301.

[0033] In this embodiment, the radiating unit 3 is composed of a dielectric substrate A301 and a radiating patch A302. The dielectric substrate A301 is located between the radiating patch A302 and the ground plane 2. The dielectric substrate A301 provides mechanical support for the upper radiating patch A302 to prevent short circuit between the radiating patch A302 and the ground plane 2.

[0034] Please refer to the specific details. Figure 1 As shown, the number of virtual element antenna elements 4 is between 3 and 8.

[0035] In this embodiment, there are 6 virtual element antenna elements 4, and the number can be adjusted according to the actual situation.

[0036] Please refer to the specific details. Figure 1 and Figure 3 As shown, each virtual element antenna unit 4 includes a dielectric substrate B401 and a radiating patch B402. Each dielectric substrate B401 is mounted on top of the ground plane 2, and each radiating patch B402 is mounted on top of the dielectric substrate B401.

[0037] In this embodiment, each virtual element antenna unit 4 is composed of a dielectric substrate B401 and a radiating patch B402. The dielectric substrate B provides mechanical support for the radiating patch B to prevent short circuit between the radiating patch B402 and the ground plane 2. The virtual element antenna unit 4 and the radiating unit 3 adopt the same or similar structure.

[0038] Please refer to the specific details. Figure 1 and Figure 3 As shown, each virtual element antenna unit has a 50-ohm load connected to all four ports.

[0039] In this embodiment, a 50-ohm load is connected to the four ports of the virtual element antenna to achieve impedance matching, maximize power transmission, and reduce signal reflection. This prevents unabsorbed energy from being superimposed onto the main radiating element, reducing phase noise caused by multipath effects. Some stray energy is converted into heat, stabilizing the electromagnetic environment around the main radiating element and preventing sudden phase jumps.

[0040] Working principle: In use, the antenna body 1 adopts a low-profile antenna, and the radiating element 3 is installed at the top center of the ground plane 2. The ground plane 2 acts as a reflector of the antenna, which can guide the radiated energy to the other side in one direction. At the same time, it forms a resonant structure with the radiating element 3. Around the radiating element 3, six virtual element antenna elements 4 are evenly and symmetrically placed along the edge of the ground plane 2. The virtual element antenna elements 4 also adopt a low-profile microstrip antenna, and a 50-ohm load is connected to its port. After adding virtual elements to the low-profile antenna, the phase center stability performance of the phase pattern is improved. This translates to an improvement in the positioning accuracy of the antenna in navigation and positioning signals. Under the conditions of low profile and low cost, the requirements of high-precision satellite positioning are met.

[0041] In this invention, the virtual element antenna unit adopts the same low-profile layered structure (dielectric substrate + radiating patch) as the radiating unit, maintaining electrical continuity while achieving mechanical decoupling through physical separation. When the substrate is subjected to minor deformation by external forces, the elastic deformation of the virtual element antenna unit can absorb some of the stress, protecting the structural integrity of the radiating unit. The "buffer layer" formed by the symmetrically distributed virtual element antenna units can effectively disperse mechanical strain and maintain the stability of the overall electromagnetic performance. The virtual element antenna unit and the main unit form a quasi-periodic structure, forming multiple resonant modes within the operating frequency band. This multi-mode coexistence characteristic broadens the effective bandwidth of the antenna, while making the phase response curve smoother and reducing the phase slope in narrow bands. By adjusting the number and spacing of the virtual element antenna units, the equivalent quality factor of the antenna system can be precisely controlled, optimizing the phase linearity while ensuring sufficient bandwidth.

[0042] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A high phase center stability antenna array, characterized in that, include: The antenna body (1) includes a ground plane (2) and a radiating element (3), the radiating element (3) being mounted on top of the ground plane (2); as well as Multiple virtual element antenna units (4) are provided and are evenly installed on the antenna body (1); Each of the virtual element antenna units (4) includes a dielectric substrate B (401) and a radiating patch B (402), each of the dielectric substrates B (401) is mounted on top of the ground plane (2), and each of the radiating patches B (402) is mounted on top of the dielectric substrate B (401); Each of the virtual element antenna units (4) is connected to a 50-ohm load at its port.

2. The high phase center stability antenna array according to claim 1, characterized in that, The radiation unit (3) includes a dielectric substrate A (301) and a radiation patch A (302). The dielectric substrate A (301) is mounted on the top of the ground plane (2), and the radiation patch A (302) is mounted on the top of the dielectric substrate A (301).

3. The high phase center stability antenna array according to claim 2, characterized in that, The number of virtual element antenna units (4) is between 3 and 8.

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