A broadband multi-network fusion satellite navigation terminal antenna

Abstract

The present invention belongs to the field of antenna technology, and particularly relates to a broadband multi-network fusion satellite navigation terminal antenna, wherein the terminal antenna is a combined antenna, including a metal reflector, etc., and also includes a cross dipole arm A, a cross dipole arm B, a monopole antenna, a defective ground structure, a monopole antenna feed port, a PIFA antenna, a PIFA antenna feed port, a coaxial probe, and a metal coupling patch, etc. The antenna of the present invention adopts a broadband cross dipole structure to achieve GNSS full-band coverage, adopts a PIFA structure to achieve Bluetooth / WLAN band coverage, and adopts a defective ground monopole structure to achieve mobile communication broadband coverage, and has the characteristics of multi-band, high gain, easy tuning, and simple manufacturing; in addition, the overall design of the combined antenna is compact, the mutual influence between antennas is small, and the multi-band, high gain, and easy tuning characteristics of the antenna meet the requirements of multi-system compatible and highly integrated satellite positioning terminals for antennas.

Description

Technical Field

[0001] The invention belongs to the technical field of antennas, and in particular relates to a broadband multi-network fusion satellite navigation terminal antenna. Background Art

[0002] Antenna is a component in radio equipment used to transmit or receive electromagnetic waves. It is an important component of the communication system. It can transform guided waves propagating on the transmission line into electromagnetic waves propagating in free space, or transform electromagnetic waves propagating in free space into guided waves propagating on the transmission line.

[0003] With the investment and application of satellite navigation and communication systems in countries around the world, satellite navigation and communication systems are closely linked to users' production and life, and the application scenarios of satellite navigation systems are becoming more and more extensive. At present, the RTK measurement and mapping industry is changing with each passing day, and the industry is developing rapidly. The instruments and equipment used in the measurement and mapping process are also constantly developing, and their functions are becoming increasingly rich. Early instruments and equipment only supported measurement and mapping functions, but many other functions have been added to the current instruments and equipment, such as 4G full network communication functions, Bluetooth / WLAN functions, NFC functions, etc. RTK instruments and equipment are becoming more and more intelligent, and their integration is getting higher and higher.

[0004] Due to the combination of multiple antennas, the size of the antenna will inevitably increase, the interference between the antennas will also become greater, and at the same time it cannot meet the needs of RTK measurement and mapping instruments and equipment. Therefore, it is urgent to develop a broadband multi-network fusion satellite navigation terminal antenna that integrates multiple antennas into one and can meet the ever-changing needs of RTK measurement and mapping instruments and equipment. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In order to address the problems that the combination of multiple antennas in the prior art will inevitably increase the size of the antenna, the interference between the antennas will also become larger, and at the same time the gaps and shortcomings in the requirements of RTK measurement and mapping instruments and equipment cannot be met, the present invention provides a broadband multi-network fusion satellite navigation terminal antenna that integrates multiple antennas into one and can meet the ever-changing requirements of RTK measurement and mapping instruments and equipment. The antenna adopts a broadband cross-dipole structure to achieve GNSS full-band coverage, adopts a PIFA structure to achieve Bluetooth / WLAN band coverage, and adopts a defective ground monopole structure to achieve mobile communication broadband coverage. The antenna has the characteristics of multi-band, high gain, easy tuning and simple manufacturing.

[0007] (II) Technical solution

[0008] The present invention is implemented through the following technical solutions: The present invention proposes a broadband multi-network fusion satellite navigation terminal antenna, wherein the terminal antenna is a combined antenna, which is composed of a cross-dipole antenna, a monopole antenna and a PIFA antenna;

[0009] Includes metal reflector,

[0010] There are also square dielectric substrates on the front, back, left, right and center of the metal reflector.

[0011] The center of the central square dielectric substrate is concentrically arranged with the center of the metal reflector;

[0012] Also included are a cross dipole arm A, a cross dipole arm B, a monopole antenna, a defective ground structure, a monopole antenna feeding port, a PIFA antenna, a PIFA antenna feeding port, a coaxial probe and a metal coupling patch;

[0013] The structure of the cross-dipole antenna is as follows: a square dielectric substrate in which a cross-dipole arm A, a cross-dipole arm B, a coaxial probe and a metal coupling patch are all arranged at the center; the coaxial probe is arranged at the center of the square dielectric substrate in the center; the cross-dipole arm A and the cross-dipole arm B are arranged on the upper and lower surfaces of the square dielectric substrate in the center, respectively; the cross-dipole arm A and the cross-dipole arm B are connected to the coaxial probe, and the cross-dipole arm A and the cross-dipole arm B are fed through the coaxial probe and the coaxial line; a metal coupling patch is printed around the cross-dipole arm A on the upper surface of the square dielectric substrate in the center;

[0014] The monopole antenna structure is as follows: the square dielectric substrates at the front and rear sides are provided with monopole antennas, defective ground structures, and monopole antenna feeding ports; the monopole antennas and defective ground structures are arranged on different sides of the square dielectric substrate;

[0015] The monopole antenna is connected to the defective ground structure through the monopole antenna feeding port; the monopole antenna is provided with a microstrip antenna structure with an L-shaped branch;

[0016] The square dielectric substrates on the front and rear sides are symmetrically arranged;

[0017] The PIFA antenna structure is as follows: the square dielectric substrates on the left and right sides are provided with PIFA antennas and PIFA antenna feeding ports; the PIFA antennas and PIFA antenna feeding ports are arranged on the sides of the square dielectric substrates, and the PIFA antennas and PIFA antenna feeding ports are connected;

[0018] The square dielectric substrates on the left and right sides are symmetrically arranged.

[0019] Preferably, the cross-dipole arm A and the cross-dipole arm B are connected to the inner and outer cores of the coaxial probe.

[0020] Preferably, the metal coupling patch consists of an outer square ring patch and four inner squares.

[0021] Preferably, the cross-dipole antenna, the monopole antenna and the PIFA antenna are all printed on a square dielectric substrate using a printing technique.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The antenna of the present invention adopts a broadband cross-dipole structure to achieve GNSS full-band coverage, adopts a PIFA structure to achieve Bluetooth / WLAN band coverage, and adopts a defective ground monopole structure to achieve mobile communication broadband coverage. It has the characteristics of multi-band, high gain, easy tuning and simple manufacturing. In addition, the overall design of the combined antenna is compact, the mutual influence between antennas is small, and the multi-band, high gain and easy tuning characteristics of the antenna meet the requirements of multi-system compatible and highly integrated satellite positioning terminals for antennas. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 It is a front view structural schematic diagram of the present invention;

[0028] Figure 3 It is a side view structural schematic diagram of the present invention;

[0029] Figure 4 It is a schematic diagram of the top view structure of the present invention;

[0030] Figure 5 This is the reflection coefficient simulation result diagram of the cross-dipole antenna;

[0031] Figure 6 This is the simulation result diagram of the circular polarization axial ratio bandwidth of the cross-dipole antenna;

[0032] Figure 7 This is the reflection coefficient simulation result diagram of the cross monopole antenna;

[0033] Figure 8 This is the gain simulation result diagram of the cross monopole antenna;

[0034] Fig. 9 This is the reflection coefficient simulation result diagram of the PIFA antenna;

[0035] Fig.10 This is the gain simulation result diagram of the PIFA antenna;

[0036] Marked in the figure: 1-coaxial line, 2-cross dipole arm A, 3-cross dipole arm B, 4-monopole antenna, 5-defective ground structure, 6-monopole antenna feeding port, 7-PIFA antenna, 8-PIFA antenna feeding port, 9-metal reflector, 10-coaxial probe, 11-metal coupling patch. DETAILED DESCRIPTION

[0037] In this technical solution:

[0038] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] Reference Figure 1-4 As shown, the present invention proposes a broadband multi-network fusion satellite navigation terminal antenna, the terminal antenna is a combined antenna, which is composed of a cross dipole antenna, a monopole antenna and a PIFA antenna; the monopole antenna and the PIFA antenna are both in two groups; the cross dipole antenna is located in the middle, and the two groups of monopole antennas and PIFA antennas surround the cross dipole antenna and are placed alternately in sequence;

[0040] Includes metal reflector,

[0041] There are also square dielectric substrates on the front, back, left, right and center of the metal reflector.

[0042] The center of the central square dielectric substrate is concentrically arranged with the center of the metal reflector;

[0043] Also included are a cross dipole arm A, a cross dipole arm B, a monopole antenna, a defective ground structure, a monopole antenna feeding port, a PIFA antenna, a PIFA antenna feeding port, a coaxial probe and a metal coupling patch;

[0044] The structure of the cross-dipole antenna is as follows: a square dielectric substrate in which a cross-dipole arm A, a cross-dipole arm B, a coaxial probe and a metal coupling patch are all arranged at the center; the coaxial probe is arranged at the center of the square dielectric substrate in the center; the cross-dipole arm A and the cross-dipole arm B are arranged on the upper and lower surfaces of the square dielectric substrate in the center, respectively; the cross-dipole arm A and the cross-dipole arm B are connected to the coaxial probe, and the cross-dipole arm A and the cross-dipole arm B are fed through the coaxial probe and the coaxial line; a metal coupling patch is printed around the cross-dipole arm A on the upper surface of the square dielectric substrate in the center;

[0045] The monopole antenna structure is as follows: the square dielectric substrates at the front and rear sides are provided with monopole antennas, defective ground structures, and monopole antenna feeding ports; the monopole antennas and defective ground structures are arranged on different sides of the square dielectric substrate;

[0046] The monopole antenna is connected to the defective ground structure through the monopole antenna feeding port; the monopole antenna is provided with a microstrip antenna structure with an L-shaped branch;

[0047] The square dielectric substrates on the front and rear sides are symmetrically arranged;

[0048] The PIFA antenna structure is as follows: the square dielectric substrates on the left and right sides are provided with PIFA antennas and PIFA antenna feeding ports; the PIFA antennas and PIFA antenna feeding ports are arranged on the sides of the square dielectric substrates, and the PIFA antennas and PIFA antenna feeding ports are connected;

[0049] The square dielectric substrates on the left and right sides are symmetrically arranged.

[0050] Wherein, the cross-dipole arm A and the cross-dipole arm B are connected to the inner and outer cores of the coaxial probe;

[0051] Wherein, the metal coupling patch is composed of an outer square ring patch and four inner squares;

[0052] The antenna adopts a broadband cross-dipole structure to achieve full-band coverage of GNSS, a PIFA structure to achieve Bluetooth / WLAN band coverage, and a defective ground monopole structure to achieve broadband coverage of mobile communications. It has the characteristics of multi-band, high gain, easy tuning and simple manufacturing.

[0053] Reference Figure 5-10 It can be seen that compared with the prior art, the present invention has the following advantages: the overall design of the combined antenna is compact, the mutual influence between antennas is small, and the multi-band, high gain and easy tuning characteristics of the antenna meet the requirements of multi-system compatible and highly integrated satellite positioning terminals for antennas.

[0054] 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" 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.

[0055] In addition, 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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A broadband multi-network fusion satellite navigation terminal antenna, the terminal antenna is a combined antenna, characterized in that: It includes a metal reflector plate (9), A square dielectric substrate is also provided on the front, rear, left, right and center of the metal reflector (9). The center of the central square dielectric substrate is concentrically arranged with the center of the metal reflector (9); It also includes a cross dipole arm A (2), a cross dipole arm B (3), a monopole antenna (4), a defective ground structure (5), a monopole antenna feeding port (6), a PIFA antenna (7), a PIFA antenna feeding port (8), a coaxial probe (10) and a metal coupling patch (11); The cross-dipole arm A (2), the cross-dipole arm B (3), the coaxial probe (10) and the metal coupling patch (11) are all arranged on a square dielectric substrate at the center; The coaxial probe (10) is arranged at the center of the central square dielectric substrate; the cross dipole arm A (2) and the cross dipole arm B (3) are arranged on the upper and lower surfaces of the central square dielectric substrate respectively; the cross dipole arm A (2) and the cross dipole arm B (3) are connected to the coaxial probe (10), and the cross dipole arm A (2) and the cross dipole arm B (3) are fed through the coaxial probe (10) and the coaxial line (1); a metal coupling patch (11) is printed around the cross dipole arm A (2) on the upper surface of the central square dielectric substrate; The square dielectric substrates on the front and rear sides are provided with monopole antennas (4), defective ground structures (5), and monopole antenna feeding ports (6); the square dielectric substrates on the front and rear sides are symmetrically arranged; The monopole antenna (4) and the defective ground structure (5) are arranged on different sides of the square dielectric substrate; The monopole antenna (4) is connected to the defective ground structure (5) via the monopole antenna feeding port (6); the monopole antenna (4) is provided with a microstrip antenna structure with L-shaped branches; The square dielectric substrates on the left and right sides are provided with PIFA antennas (7) and PIFA antenna feeding ports (8); the square dielectric substrates on the left and right sides are symmetrically arranged; the PIFA antenna (7) and the PIFA antenna feeding port (8) are arranged on the side surfaces of the square dielectric substrates, and the PIFA antenna (7) and the PIFA antenna feeding port (8) are connected.

2. The broadband multi-network fusion satellite navigation terminal antenna according to claim 1, characterized in that: The cross dipole arm A (2) and the cross dipole arm B (3) are connected to the inner and outer core of the coaxial probe (10).

3. The broadband multi-network fusion satellite navigation terminal antenna according to claim 1, characterized in that: The metal coupling patch consists of an outer square ring patch and four inner squares.

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