Shortwave array antenna and vehicle communication system

Abstract

The present invention provides a shortwave array antenna and a vehicle-mounted communication system, and relates to the field of communication technology. The shortwave array antenna provided by the present invention includes: a logarithmic periodic antenna, a dual three-wire loaded dipole antenna and a bracket; the logarithmic periodic antenna is located above the dual three-wire loaded dipole antenna, and the logarithmic periodic antenna and the dual three-wire loaded dipole antenna are respectively installed on the bracket. The logarithmic periodic antenna is used to achieve medium and long-distance communication, and the dual three-wire loaded dipole antenna is used to achieve short-distance communication, thereby achieving both short-distance and long-distance communication capabilities. In addition, the shortwave array antenna can be mounted on a vehicle platform, can achieve high gain and broadband, meet the effective and reliable communication requirements of short, medium and long distances, and can also move in real time to meet the needs of rapid deployment in specific areas, and can effectively solve the problem of insufficient short-distance communication resources in hot spots.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a shortwave array antenna and a vehicle-mounted communication system. Background Art

[0002] Short-distance shortwave communications within 300 kilometers face great difficulties, mainly because the frequency used in short-distance skywave communications is low, the elevation angle is high, and the antenna size is large. Antennas that generally work in this frequency band are limited by size and difficult to install, so the bandwidth is not wide enough and the efficiency is very low, resulting in low gain. Long-distance communications are just the opposite, mainly using the medium and high frequency bands of shortwave, and the required elevation angle is very low, so the gain can be relatively high.

[0003] At present, antennas with good performance are designed to highlight the performance of short-distance or long-distance. It is difficult for a single antenna system to take into account both short-distance and long-distance performance, which makes it impossible to be used for short-distance and long-distance communications at the same time. At present, vehicle-mounted shortwave communication systems usually use whip antennas, half-ring or three-ring antennas, of which half-ring and three-ring antennas are high-elevation antennas, which can ensure short-distance communication performance, but the performance at low elevation angles for long distances is very poor. When the vehicle-mounted shortwave communication system uses a whip antenna, because the main beam of the whip antenna is concentrated at medium and low elevation angles, the gain at high elevation angles is very low, and high-elevation angle short-distance communication is basically impossible to achieve. In low-elevation angle ground wave transmission, the performance is greatly affected by the ground conductivity, and the low-elevation angle antenna broadcast distance is also limited under normal ground conditions. Summary of the invention

[0004] The object of the present invention is to provide a shortwave array antenna and a vehicle-mounted communication system to alleviate the technical problem in the prior art that shortwave antennas are difficult to achieve both short-range and long-range communication capabilities.

[0005] In a first aspect, the present invention provides a shortwave array antenna, comprising: a log-periodic antenna, a dual trifilar loaded dipole antenna and a bracket;

[0006] The logarithmic periodic antenna is located above the dual trifilar loaded dipole antenna, and the logarithmic periodic antenna and the dual trifilar loaded dipole antenna are respectively mounted on the bracket.

[0007] In combination with the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the log-periodic antenna comprises: a truss beam, a telescopic device and a first oscillator;

[0008] The truss beam is installed on the bracket, the first vibrator is hinged to the truss beam, one end of the telescopic device is hinged to the truss beam, and the other end of the telescopic device is hinged to the first vibrator.

[0009] In combination with the first possible implementation manner of the first aspect, the present invention provides a second possible implementation manner of the first aspect, wherein a plurality of first vibrators are provided, and the plurality of first vibrators are arranged at intervals and are respectively hinged to the truss beam;

[0010] Any two adjacent first vibrators are hingedly connected with a connecting rod.

[0011] In combination with the first possible implementation manner of the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein the truss beam is rotatably connected to an adapter seat, and the adapter seat is connected to the bracket.

[0012] In combination with the first aspect, the present invention provides a fourth possible implementation manner of the first aspect, wherein the dual trifilar loaded dipole antenna comprises: a supporting platform and a plurality of second oscillators;

[0013] The support platform is installed on the bracket, and a plurality of the second vibrators are arranged at intervals around the support platform. The plurality of the second vibrators are connected to the support platform and open outward from top to bottom relative to the support platform.

[0014] In combination with the fourth possible implementation manner of the first aspect, the present invention provides a fifth possible implementation manner of the first aspect, wherein the second vibrator includes: a first section arm, a second section arm and a third section arm;

[0015] The first section arm is connected to the supporting platform, and the first section arm, the second section arm and the third section arm are connected in sequence through folding connecting pieces.

[0016] In combination with the fourth possible implementation of the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein a feed load assembly is installed on the support platform, and the log-periodic antenna and the dual three-wire loaded dipole antenna are respectively connected to the feed load assembly.

[0017] In combination with the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein the bracket includes a telescopic arm, and the log-periodic antenna and the dual trifilar loaded dipole antenna are respectively connected to the telescopic arm.

[0018] In a second aspect, the vehicle-mounted communication system provided by the present invention comprises: a vehicle platform and the shortwave array antenna recorded in the first aspect, wherein the bracket is installed on the vehicle platform.

[0019] In combination with the second aspect, the vehicle platform is installed with a plurality of support members, which support the chassis of the vehicle platform and are arranged at intervals around the chassis of the vehicle platform.

[0020] The embodiments of the present invention bring the following beneficial effects: a logarithmic periodic antenna is located above a dual three-wire loaded dipole antenna, and the logarithmic periodic antenna and the dual three-wire loaded dipole antenna are respectively installed on brackets, the logarithmic periodic antenna is used to achieve medium and long-distance (greater than 500km) communication, and the dual three-wire loaded dipole antenna is used to achieve short-distance communication, thereby achieving both short-distance and long-distance communication capabilities.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of a vehicle-mounted communication system provided by an embodiment of the present invention;

[0024] Figure 2 A top view of a log-periodic antenna of a shortwave array antenna provided by an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of a log-periodic antenna of a shortwave array antenna provided in an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of a dual tri-wire loaded dipole antenna of a shortwave array antenna provided in an embodiment of the present invention;

[0027] Figure 5 A partially enlarged schematic diagram of the support platform, the second oscillator and the feed load assembly of the shortwave array antenna provided in an embodiment of the present invention.

[0028] Icons: 100 - log-periodic antenna; 110 - truss beam; 120 - telescopic device; 130 - first oscillator; 140 - connecting rod; 150 - adapter; 200 - dual three-wire loaded dipole antenna; 210 - support platform; 220 - second oscillator; 221 - first arm section; 222 - second arm section; 223 - third arm section; 300 - bracket; 400 - feed load assembly; 500 - vehicle platform; 600 - support member. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, if not separately marked, should be understood as basic quantities of the base units of the International System of Units, or derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 indirectly connected 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 the present invention can be understood according to specific circumstances.

[0032] like Figure 1 As shown, the shortwave array antenna provided by the embodiment of the present invention includes: a logarithmic periodic antenna 100, a dual three-wire loaded dipole antenna 200 and a bracket 300; the logarithmic periodic antenna 100 is located above the dual three-wire loaded dipole antenna 200, and the logarithmic periodic antenna 100 and the dual three-wire loaded dipole antenna 200 are respectively installed on the bracket 300.

[0033] The logarithmic periodic antenna 100 is used to realize the requirements of medium and long distance (greater than 500km) communication, and the dual three-wire loaded dipole antenna 200 is used to realize the requirements of short distance (within 500km) communication. Through the two types of antenna arrays, both short distance and long distance communication capabilities are achieved.

[0034] like Figure 2 and Figure 3As shown, in an embodiment of the present invention, the log-periodic antenna 100 includes: a truss beam 110, a telescopic device 120 and a first vibrator 130; the truss beam 110 is installed on a bracket 300, the first vibrator 130 is hinged to the truss beam 110, one end of the telescopic device 120 is hinged to the truss beam 110, and the other end of the telescopic device 120 is hinged to the first vibrator 130.

[0035] The telescopic device 120 can be used to drive the first vibrator 130 to swing relative to the truss beam 110. When contracted, the first vibrator 130 can be placed against the truss beam 110 to achieve folding. When working, the telescopic device 120 can drive the first vibrator 130 to unfold relative to the truss beam 110. A plurality of triangular structures are arranged inside the truss beam 110 to improve the structural strength. The first vibrator 130 is supported by the truss beam 110. On the one hand, the bending deformation is controlled within a smaller range, and on the other hand, it has a strong wind resistance. In addition, the log-periodic antenna 100 is provided with a collection line and an impedance transformer. The collection line is used to distribute the radio frequency signal to each vibrator so as to achieve a specific antenna radiation direction. The function of the impedance transformer is to perform balanced-unbalanced conversion and impedance transformation so that the characteristic impedance of the antenna and the characteristic impedance of the feeder are matched to ensure that the radio frequency signal can be transmitted to the maximum extent.

[0036] Furthermore, a plurality of first vibrators 130 are provided, and the plurality of first vibrators 130 are arranged at intervals and are respectively hinged to the truss beam 110; a connecting rod 140 is hingedly connected between any two adjacent first vibrators 130. The plurality of first vibrators 130 are divided into two groups, and the two groups of first vibrators 130 are symmetrically arranged relative to the truss beam 110, each group of first vibrators 130 is driven to retract and extend by a telescopic device 120, and any two first vibrators 130 in each group of first vibrators 130 are linked by the connecting rod 140.

[0037] In addition, the truss beam 110 is rotatably connected to the adapter 150, and the adapter 150 is connected to the bracket 300. The truss beam 110 can be rotated relative to the bracket 300 through the adapter 150 to meet the communication requirements at any azimuth angle. A rotation drive mechanism can be added to the adapter 150 to drive the truss beam 110 to rotate relative to the bracket 300.

[0038] like Figure 1 , Figure 4 and Figure 5 As shown, the dual three-wire loaded dipole antenna 200 includes: a supporting platform 210 and a plurality of second vibrators 220; the supporting platform 210 is installed on a bracket 300, the plurality of second vibrators 220 are arranged at intervals around the supporting platform 210, and the plurality of second vibrators 220 are connected to the supporting platform 210 and open outward from top to bottom relative to the supporting platform 210.

[0039] In this embodiment, a driving device is used to drive each second vibrator 220 to tilt relative to the supporting platform 210, thereby adjusting the angle of each second vibrator 220. In addition, each second vibrator 220 includes: a first section arm 221, a second section arm 222 and a third section arm 223; the first section arm 221 is connected to the supporting platform 210, and the first section arm 221, the second section arm 222 and the third section arm 223 are connected in turn through a folding connecting piece, thereby realizing a three-section telescopic function.

[0040] Furthermore, a feed load assembly 400 is installed on the support platform 210 , and the log-periodic antenna 100 and the dual-trifilar loaded dipole antenna 200 are respectively connected to the feed load assembly 400 .

[0041] Among them, the feeding load assembly 400 has a phase shifting function, which can perform a 90-degree phase shift on one signal, thereby realizing orthogonal feeding of the dual three-wire loaded dipole antenna 200 and realizing the circular polarization function.

[0042] In an optional embodiment, the bracket 300 includes a telescopic arm, and the log-periodic antenna 100 and the dual three-wire loaded dipole antenna 200 are respectively connected to the telescopic arm, and the position heights of the log-periodic antenna 100 and the dual three-wire loaded dipole antenna 200 can be adjusted respectively through the telescopic arm, and the log-periodic antenna 100 and the dual three-wire loaded dipole antenna 200 can be retracted and unfolded respectively, which not only meets the road transport size requirements in the transport state, but also meets the requirement of lifting the antenna to the required height in the working state.

[0043] like Figure 1 As shown, the vehicle-mounted communication system provided by the embodiment of the present invention includes: a vehicle platform 500 and the shortwave array antenna described in the above embodiment, and the bracket 300 is installed on the vehicle platform 500.

[0044] The vehicle-mounted communication system described in this embodiment has the technical advantages of the above-mentioned shortwave array antenna.

[0045] In the embodiment of the present invention, the vehicle platform 500 is equipped with a plurality of supporting members 600, which support the chassis of the vehicle platform 500 and are arranged at intervals around the chassis of the vehicle platform 500. Before the shortwave array antenna is deployed, it should be supported on the ground by the plurality of supporting members 600 to ensure the stability of the vehicle platform 500. In addition, the vehicle platform 500 may also be equipped with auxiliary equipment such as a tool box, a fuel tank, an air cylinder, a spare tire, a hydraulic oil tank, etc.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shortwave array antenna, characterized in that: include: A log-periodic antenna (100), a dual trifilar loaded dipole antenna (200), and a bracket (300); The logarithmic periodic antenna (100) is located above the dual trilinear loaded dipole antenna (200), and the logarithmic periodic antenna (100) and the dual trilinear loaded dipole antenna (200) are respectively mounted on the bracket (300).

2. The shortwave array antenna according to claim 1, characterized in that: The logarithmic periodic antenna (100) comprises: a truss beam (110), a telescopic device (120) and a first oscillator (130); The truss beam (110) is installed on the bracket (300), the first vibrator (130) is hinged to the truss beam (110), one end of the telescopic device (120) is hinged to the truss beam (110), and the other end of the telescopic device (120) is hinged to the first vibrator (130).

3. The shortwave array antenna according to claim 2, characterized in that: A plurality of the first vibrators (130) are provided, and the plurality of the first vibrators (130) are arranged at intervals and are respectively hinged to the truss beam (110); A connecting rod (140) is hingedly connected between any two adjacent first vibrators (130).

4. The shortwave array antenna according to claim 2, characterized in that: The truss beam (110) is rotatably connected to the adapter seat (150), and the adapter seat (150) is connected to the bracket (300).

5. The shortwave array antenna according to claim 1, characterized in that: The dual three-wire loaded dipole antenna (200) comprises: a supporting platform (210) and a plurality of second oscillators (220); The support platform (210) is installed on the bracket (300), and a plurality of second vibrators (220) are arranged at intervals around the support platform (210), and the plurality of second vibrators (220) are connected to the support platform (210) and spread outward from top to bottom relative to the support platform (210).

6. The shortwave array antenna according to claim 5, characterized in that: The second vibrator (220) comprises: a first arm (221), a second arm (222) and a third arm (223); The first section arm (221) is connected to the supporting platform (210), and the first section arm (221), the second section arm (222) and the third section arm (223) are connected in sequence through folding connecting pieces.

7. The shortwave array antenna according to claim 5, characterized in that: A feed load assembly (400) is installed on the support platform (210), and the logarithmic periodic antenna (100) and the dual three-wire loaded dipole antenna (200) are respectively connected to the feed load assembly (400).

8. The shortwave array antenna according to claim 1, characterized in that: The support (300) comprises a telescopic arm, and the logarithmic periodic antenna (100) and the dual trifilar loaded dipole antenna (200) are respectively connected to the telescopic arm.

9. A vehicle-mounted communication system, characterized in that: include: A vehicle platform (500) and the shortwave array antenna according to any one of claims 1 to 8, wherein the bracket (300) is installed on the vehicle platform (500).

10. The vehicle-mounted communication system according to claim 9, characterized in that: The vehicle platform (500) is installed with a plurality of support members (600), and the plurality of support members (600) support the chassis of the vehicle platform (500) and are arranged at intervals around the chassis of the vehicle platform (500).

Images