Ultra-wideband multi-service vehicle-mounted antenna for railway communication

Abstract

The invention discloses an ultra-wideband multi-service vehicle-mounted antenna for railway communication, which belongs to the field of wireless communication antennae, and comprises a high-precision positioning module, a first antenna, a 350MHz-9000MHz ultra-wideband antenna and a second antenna which are sequentially arranged on a mounting bottom plate from front to back at intervals, the 350MHz to 9000MHz ultra-wideband antenna adopts a planar special-shaped monopole radiation unit; and the wind-resistant outer cover is buckled and fixed on the mounting bottom plate and covers the high-precision positioning module, the first antenna, the 350MHz-9000MHz ultra-wideband antenna and the second antenna. According to the antenna, the planar special-shaped monopole radiation unit is used as a 350MHz-9000MHz ultra-wideband antenna, fusion of multiple types of multi-band antennas is realized, multiple types of service antennas are integrated in one antenna, and all the antennas are in omnidirectional radiation, compact in structure arrangement and stable in installation mode.

Description

Technical Field

[0001] The invention relates to the technical field of antennas for wireless communications, and in particular to an ultra-wideband multi-service vehicle-mounted antenna for railway communications. Background Art

[0002] With the rapid development of mobile communications in my country, mobile communications have been applied to various fields and have become more and more in-depth. As the largest passenger transport carrier in my country, the mobile communication technology related to intelligent railways has also developed rapidly, and the transmission demand for information control, vehicle command, and train monitoring has continued to increase. Based on the existing mobile communication business needs, multiple antennas have been installed in the limited space on the roof. With the increase in business needs, it can be foreseen that a batch of new business equipment will be put into use in the future, which will inevitably give rise to new demand for the number of vehicle-mounted antennas.

[0003] At present, my country's train communication frequency bands range from 400MHz to 6000MHz, and multiple standards and multiple services are jointly applied. Due to the diversity of services, the number of antennas required is also different. According to current research, a 350 km / h EMU rooftop antenna requires a total of 27 antenna elements, and a 250 km / h EMU rooftop antenna requires a total of 26 antenna elements. In the future, the demand for rooftop antennas for EMUs with a speed of more than 400 km / h will increase, and with the development of 6G, lower and higher frequency bands may also be used, but so many antennas cannot be installed in the limited space on the roof of existing trains.

[0004] A vehicle-mounted antenna is disclosed in a Chinese patent application with application number CN202211503598.7, but this antenna only supports 400MHz to 5000MHz services and cannot meet the mobile communication requirements of lower frequency services. Another Chinese patent application with application number CN202211503598.7 also discloses a vehicle-mounted antenna, in which the GSM-R antenna adopts a monopole antenna with a high antenna height, which is not conducive to a low profile, and this antenna cannot support communication services below 400MHz and above 5000MHz.

[0005] Therefore, how to provide an antenna that integrates multi-band services and can meet the requirements for installation on the roof of a train is an issue that needs to be solved urgently.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] The purpose of the present invention is to provide an ultra-wideband multi-service vehicle-mounted antenna for railway communications, which can integrate multiple types of multi-band antennas into one antenna, minimize the roof installation space and antenna height, and thus solve the above-mentioned technical problems existing in the prior art.

[0008] The objective of the present invention is achieved through the following technical solutions: An ultra-wideband multi-service vehicle-mounted antenna for railway communication, comprising: Install the base plate, high-precision positioning module, first antenna, 350MHz to 9000MHz ultra-wideband antenna, second antenna and wind-resistant cover; among them, The installation base plate is provided with a high-precision positioning module, a first antenna, a 350MHz to 9000MHz ultra-wideband antenna, and a second antenna in sequence from front to back; The 350MHz to 9000MHz ultra-wideband antenna adopts a planar special-shaped monopole radiating unit; the planar special-shaped monopole radiating unit is installed on the installation base plate through a support frame, and the planar special-shaped monopole radiating unit includes: a metal plane body, a circular metal radiating unit, an elliptical vacancy and a circular coupling unit; wherein the circular metal radiating unit, the elliptical vacancy and the circular coupling unit are arranged in sequence from bottom to top on the metal plane body, and the circular metal radiating unit and the circular coupling unit are isolated into two independent radiating units by the elliptical vacancy, and the circular metal radiating unit, the elliptical vacancy and the circular coupling unit together form a gradient non-periodic traveling wave antenna capable of realizing 350MHz to 9000MHz ultra-wideband signal radiation; a feeding microstrip line is arranged at the bottom of the circular metal radiating unit, and is electrically connected to the outside through the feeding microstrip line; The wind-resistant outer cover is buckled and fixed on the mounting base plate, covering the high-precision GNSS positioning module, the 5G-R antenna, the 350MHz to 9000MHz ultra-wideband antenna and the low-profile GSM antenna.

[0009] Compared with the prior art, the ultra-wideband multi-service vehicle-mounted antenna and vehicle-mounted communication system for railway communication provided by the present invention have the following beneficial effects: By arranging the high-precision positioning module, the first antenna, the 350MHz to 9000MHz ultra-wideband antenna and the second antenna in sequence from front to back on the installation base plate, and using a specially constructed planar special-shaped monopole radiation unit as the 350MHz to 9000MHz ultra-wideband antenna, it is possible to integrate multiple types of multi-band antennas and multiple types of service antennas into one antenna. Since each antenna can adopt a low-profile design, the roof installation space and antenna height are minimized to ensure the normal use of new service equipment such as the vehicle-mounted integrated wireless transmission platform, and the normal use of various vehicle-mounted service equipment. All antennas radiate omnidirectionally, the structure is compactly arranged, and the installation method is stable. The positioning module is independent of other antennas, without obstruction or interference, ensuring the positioning function. The overall structure of the antenna is simple and easy to install and debug. The system can well meet application requirements and solve the problem of too many roof antennas. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0011] Figure 1 A schematic structural diagram of an ultra-wideband multi-service vehicle-mounted antenna for railway communications provided by an embodiment of the present invention.

[0012] Figure 2 A schematic side structural diagram of an ultra-wideband multi-service vehicle-mounted antenna for railway communications provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0013] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in combination with the specific content of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, which does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0014] First, the terms that may be used in this article are explained as follows: The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0015] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0016] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0017] Unless otherwise specified or 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0018] When concentration, temperature, pressure, size or other parameters are expressed in the form of a numerical range, the numerical range should be understood to specifically disclose all ranges formed by the pairing of any upper limit, lower limit, and preferred value in the numerical range, regardless of whether the range is explicitly stated; for example, if a numerical range of "2 to 8" is stated, the numerical range should be interpreted as including ranges such as "2 to 7", "2 to 6", "5 to 7", "3 to 4 and 6 to 7", "3 to 5 and 7", "2 and 5 to 7", etc. Unless otherwise specified, the numerical ranges stated herein include both their end values ​​and all integers and fractions within the numerical range.

[0019] The orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings and are only for the convenience and simplification of description, and do not explicitly or implicitly indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation of this document.

[0020] The scheme provided by the present invention is described in detail below. The contents not described in detail in the embodiments of the present invention belong to the prior art known to professionals in the field. If the specific conditions are not specified in the embodiments of the present invention, they are carried out according to the conventional conditions in the field or the conditions recommended by the manufacturer. If the manufacturers are not specified in the reagents or instruments used in the embodiments of the present invention, they are all conventional products that can be purchased commercially.

[0021] like Figure 1 , Figure 2 As shown, an embodiment of the present invention provides an ultra-wideband multi-service vehicle-mounted antenna for railway communication, comprising: Install the base plate 20, the high-precision positioning module 50, the first antenna 60, the 350MHz to 9000MHz ultra-wideband antenna 30, the second antenna 70 and the wind-resistant outer cover 10; wherein, The installation base plate 20 is provided with a high-precision positioning module 50, a first antenna 60, a 350MHz to 9000MHz ultra-wideband antenna 30 and a second antenna 70 in sequence from front to back; The 350MHz to 9000MHz ultra-wideband antenna 30 adopts a planar special-shaped monopole radiating unit; the planar special-shaped monopole radiating unit is installed on the mounting base plate 20 through a supporting frame 40, and the planar special-shaped monopole radiating unit includes: A metal plane body 300, a circular metal radiation unit 301, an elliptical vacancy 302 and a circular coupling unit 303; wherein, The circular metal radiation unit 301, the elliptical vacancy 302 and the circular coupling unit 303 are arranged in sequence from bottom to top on the metal plane body 300. The circular metal radiation unit 301 and the circular coupling unit 303 are separated into two independent radiation units by the elliptical vacancy 302. The circular metal radiation unit 301, the elliptical vacancy 302 and the circular coupling unit 303 together form a gradient non-periodic traveling wave antenna capable of realizing ultra-wideband signal radiation from 350MHz to 9000MHz. A feeding microstrip line is provided at the bottom of the circular metal radiation unit 301, and is electrically connected to the outside through the feeding microstrip line; The windproof outer cover 10 is fastened and fixed on the mounting base plate 20 , covering the high-precision positioning module 50 , the first antenna 60 , the 350 MHz to 9000 MHz ultra-wideband antenna 30 and the second antenna 70 .

[0022] Preferably, in the above antenna, the metal material is a non-ferrous metal, such as aluminum or copper, and a PCB copper-clad plate may also be used.

[0023] Preferably, in the above-mentioned vehicle-mounted antenna, the metal plane body 300 is formed by integral molding to form the circular metal radiation unit 301, the elliptical vacancy 302 and the circular coupling unit 303 which are arranged in sequence from bottom to top.

[0024] Preferably, in the above-mentioned vehicle-mounted antenna, the overall height of the planar special-shaped monopole radiation unit and the support frame 40 is less than 100 mm.

[0025] Preferably, in the above-mentioned vehicle-mounted antenna, the wind-resistant outer cover 10 is an outer cover which is low in the front and high in the back and the turning surfaces of the outer surface are all arc-shaped surfaces.

[0026] Preferably, in the above-mentioned vehicle-mounted antenna, the high-precision GNSS positioning module 50, the first antenna 60, the 350MHz to 9000MHz ultra-wideband antenna 30, and the second antenna 70 are spaced apart to optimize the performance of each antenna.

[0027] Preferably, in the above-mentioned vehicle-mounted antenna, the high-precision positioning module 50 adopts any one of a high-precision GNSS positioning module, a high-precision GPS positioning module, and a BDS positioning module.

[0028] Preferably, in the above-mentioned vehicle-mounted antenna, the first antenna 60 adopts a 5G-R antenna; The second antenna 70 is a low-profile GSM antenna. Preferably, in the above-mentioned vehicle-mounted antenna, the 5G-R antenna adopts a planar monopole antenna; The low-profile GSM antenna adopts an inverted F antenna.

[0029] Preferably, in the above-mentioned vehicle-mounted antenna, the first antenna adopts any one of a WLAN antenna, a 1800MHz antenna, and a multi-frequency antenna; The second antenna is any one of a WLAN antenna, a 1800 MHz antenna, and a multi-frequency antenna.

[0030] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the solution provided by the embodiment of the present invention is described in detail with specific embodiments below.

[0031] Example 1 like Figure 1 , Figure 2 As shown, this embodiment provides an ultra-wideband multi-service vehicle-mounted antenna for railway communication, which is a multi-service fusion vehicle-mounted antenna, and the antenna includes: a high-precision positioning module 50, a second antenna 70, a first antenna 60, a 350MHz to 9000MHz ultra-wideband antenna 30 and its support base 40, a wind-resistant outer cover 10 and a mounting base 20; Among them, the high-precision positioning module 50 is preferably a miniaturized high-precision GNSS positioning module, which adopts a high dielectric constant ceramic single-feed antenna, supports GPS and Beidou at the same time, and minimizes the size of the antenna while maintaining the performance. It is fixed on the mounting base plate 20 by screws, which is stable and reliable. It can be known that in some other embodiments, the high-precision positioning module 50 can also use other high-precision positioning modules such as GPS, BDS, etc. to realize the positioning function as needed.

[0032] The second antenna 70 is a low-profile GSM antenna, using an inverted F antenna; The first antenna 60 is a planar monopole antenna, which has a simple structure and is easy to produce.

[0033] It can be known that in some other embodiments, the first antenna 60 and the second antenna 70 can adopt antenna units such as WLAN antenna, 1800 MHz antenna, multi-frequency antenna, etc. according to business needs to realize the functions of other new services.

[0034] The 350MHz to 9000MHz ultra-wideband antenna 30 is a planar special-shaped monopole radiating unit, which is fixedly mounted on the mounting base 20 through a support base 40. The planar special-shaped monopole radiating unit is composed of a metal plane body 300, a circular metal radiating unit 301, a feeding microstrip line, an elliptical vacancy 302 and a circular coupling unit 303. The circular metal radiating unit 301, the elliptical vacancy 302 and the circular coupling unit 303 together form a gradient non-periodic traveling wave antenna. Different operating frequencies correspond to different positions of the curve to receive and transmit signals, that is, different positions on the elliptical vacancy 302 correspond to different resonance points, which can increase the bandwidth of the radiating unit. The planar special-shaped monopole radiating unit with this structure can realize 350MHz-9000MHz ultra-wideband antenna radiation, the antenna gain is stable, the overall height of the antenna is less than 100 mm, and the performance within the passband is good.

[0035] The windproof outer cover 10 is fixed on the mounting base plate 20 by screws. The windproof outer cover 10 is low in the front and high in the back, and the turning surfaces of the outer surface are all arc-shaped. This low-profile structure of the outer cover can achieve a high wind resistance effect.

[0036] In summary, the antenna of the present invention adopts a planar special-shaped monopole radiating unit with a quadratic curve structure as an ultra-wideband antenna from 350MHz to 9000MHz, which meets the coverage of the entire frequency band of 350MHz-9000MHz, has excellent performance within the passband, and the overall height of the antenna is less than 100mm; and the overall layout of the antenna adopts high and low staggered and optimal spacing to reduce coupling between antennas and improve isolation between antennas; all radiating units are omnidirectional antennas with 360-degree coverage, reliable communication, and excellent performance. The positioning antenna is placed independently, and there is no metal obstruction for receiving satellite signals, and the positioning reliability is high. The wind-resistant outer cover 10 adopts a low-profile super-streamlined design with low wind resistance, which can meet the reliability requirements of a wind speed of 500 kilometers per hour.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. An ultra-wideband multi-service vehicle-mounted antenna for railway communications, characterized in that: include: A base plate (20), a high-precision positioning module (50), a first antenna (60), a 350 MHz to 9000 MHz ultra-wideband antenna (30), a second antenna (70) and a wind-resistant outer cover (10) are installed; wherein: The installation base plate (20) is provided with a high-precision positioning module (50), a first antenna (60), a 350 MHz to 9000 MHz ultra-wideband antenna (30), and a second antenna (70) in sequence from front to back; The 350MHz to 9000MHz ultra-wideband antenna (30) adopts a planar special-shaped monopole radiating unit; the planar special-shaped monopole radiating unit is installed on the installation base plate (20) via a support frame (40), and the planar special-shaped monopole radiating unit comprises: a metal plane body (300), a circular metal radiating unit (301), an elliptical vacancy (302) and a circular coupling unit (303); wherein the circular metal radiating unit (301), the elliptical vacancy (302) and the circular coupling unit (303) are arranged in sequence from bottom to top on the metal plane body (300). (302) and a circular coupling unit (303), the circular metal radiation unit (301) and the circular coupling unit (303) being isolated into two independent radiation units by an elliptical vacancy (302), the circular metal radiation unit (301), the elliptical vacancy (302) and the circular coupling unit (303) together forming a gradient non-periodic traveling wave antenna capable of radiating ultra-wideband signals from 350 MHz to 9000 MHz; a feeding microstrip line is arranged at the bottom of the circular metal radiation unit (301), and is electrically connected to the outside through the feeding microstrip line; The wind-resistant outer cover (10) is fastened and fixed on the mounting base plate (20), and covers the high-precision positioning module (50), the first antenna (60), the 350 MHz to 9000 MHz ultra-wideband antenna (30), and the second antenna (70).

2. The ultra-wideband multi-service vehicle-mounted antenna for railway communication according to claim 1, characterized in that: The metal plane body (300) is integrally formed to form the circular metal radiation unit (301), the elliptical vacancy (302) and the circular coupling unit (303) which are arranged in sequence from bottom to top.

3. The ultra-wideband multi-service vehicle-mounted antenna for railway communication according to claim 1 or 2, characterized in that: The overall height of the planar special-shaped monopole radiation unit and the support frame (40) is less than 100 millimeters.

4. The ultra-wideband multi-service vehicle-mounted antenna for railway communication according to claim 1 or 2, characterized in that: The wind-resistant outer cover (10) is an outer cover that is low in the front and high in the back, and the turning surfaces of the outer surface are all arc-shaped surfaces.

5. The ultra-wideband multi-service vehicle-mounted antenna for railway communication according to claim 1 or 2, characterized in that: The high-precision GNSS positioning module (50), the first antenna (60), the 350 MHz to 9000 MHz ultra-wideband antenna (30), and the second antenna (70) are spaced apart to optimize the performance of each antenna.

6. The ultra-wideband multi-service vehicle-mounted antenna for railway communication according to claim 1 or 2, characterized in that: The high-precision positioning module (50) adopts any one of a high-precision GNSS positioning module, a high-precision GPS positioning module, and a BDS positioning module.

7. The ultra-wideband multi-service vehicle-mounted antenna for railway communication according to claim 1 or 2, characterized in that: The first antenna (60) is a 5G-R antenna; The second antenna (70) is a low-profile GSM antenna.

8. The ultra-wideband multi-service vehicle-mounted antenna for railway communication according to claim 7, characterized in that: The 5G-R antenna adopts a planar monopole antenna; The low-profile GSM antenna adopts an inverted F antenna.

9. The ultra-wideband multi-service vehicle-mounted antenna for railway communication according to claim 1 or 2, characterized in that: The first antenna is any one of a WLAN antenna, a 1800 MHz antenna, and a multi-frequency antenna; The second antenna is any one of a WLAN antenna, a 1800 MHz antenna, and a multi-frequency antenna.

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