Ultra-wideband vehicle-mounted antenna

Abstract

The utility model belongs to the technical field of communication equipment, and particularly relates to an ultra wide band car platform antenna, which comprises a fixed seat, the fixed seat is fixedly connected with an antenna cover, an antenna structure is arranged in the antenna cover, the antenna structure comprises an impedance disc cone, a guide disc cone is arranged below the impedance disc cone, and the guide disc cone is arranged below the impedance disc cone. A zigzag cone body and a zigzag cone are arranged below the guide disc cone, the zigzag cone is fixedly connected to the inner wall of the fixed seat, and the short circuit column is arranged on the inner wall of the fixed seat. According to the ultra-wide-band car frame antenna, the antenna structure is composed of the guiding disc cone, the impedance disc cone, the zigzag cone and the short circuit columns, the inductance and capacitance distribution of the antenna is changed through the arrangement of the short circuit columns, the minimum value of the resonant frequency can be obtained by adjusting the positions of the short circuit columns, and therefore the purpose that the antenna is broadened to the low frequency is achieved; meanwhile, the design of the zigzag cone can effectively expand the impedance bandwidth, and further improves the performance of the antenna.

Description

Technical Field

[0001] The utility model relates to the technical field of communication equipment, in particular to an ultra-wideband vehicle antenna. Background Art

[0002] A dish antenna, or disk antenna, is a type of antenna used to receive electromagnetic wave signals. In specific applications, such as satellite communications and microwave relay communications, the parabolic dish antenna can reflect the signal to its focal position. At or near the focal point, a device is usually installed to collect the signal and "conduct" it to subsequent processing equipment.

[0003] In order to realize a 225MHz-3000MHz broadband vehicle antenna with the maximum gain in the entire frequency band in the horizontal direction, the most critical technology for the vehicle broadband antenna is to ensure the impedance bandwidth, gain bandwidth and the maximum gain in the horizontal direction. Generally, a disc-cone antenna is used, but traditional disc-cone antennas are difficult to achieve such a wide frequency band. In view of this, we propose an ultra-wideband vehicle antenna. Utility Model Content

[0004] The main purpose of the utility model is to provide an ultra-wideband vehicle antenna, which can solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model proposes an ultra-wideband vehicle antenna, comprising a fixing base, the fixing base is fixedly connected to a radome, an antenna structure is arranged in the radome, and the antenna structure comprises:

[0006] An impedance cone, wherein a guide cone is provided below the impedance cone;

[0007] A guide disk cone, wherein a folded vertebral body is provided below the guide disk cone;

[0008] A folded cone, the folded cone is fixedly connected to the inner wall of the fixing seat;

[0009] and a short-circuit column, wherein the short-circuit column is arranged on the inner wall of the fixing seat.

[0010] Preferably, a joint is provided at the bottom of the folded cone, and the outer wall of the joint is fixedly connected to the inner wall of the fixing seat.

[0011] Preferably, the material of the antenna cover is a winding glass fiber reinforced plastic tube, which has good flexibility, is resistant to falling, has strong impact resistance, has flame retardant function, has very low water absorption performance, has a very smooth surface and a low friction coefficient, and can maintain its original state even in long-term exposure to chemicals.

[0012] Preferably, the fixing seat is made of PC and is fixed to the vehicle body by coating the fixing seat base with colloid.

[0013] Preferably, the guide disk cone is made of aluminum alloy, which has high strength, light weight, good corrosion resistance, durability and good radio frequency radiation performance.

[0014] Preferably, the folded cone is made of aluminum alloy.

[0015] The utility model provides an ultra-wideband vehicle antenna. It has the following beneficial effects:

[0016] (1) The ultra-wideband vehicle antenna, the antenna structure consists of a guide disk cone, an impedance disk cone, a folded cone and a short-circuit column. By setting the short-circuit column, the inductance and capacitance distribution of the antenna itself changes. By adjusting the position of the short-circuit column, the minimum value of the resonant frequency can be obtained, thereby achieving the purpose of widening the antenna to a low frequency. At the same time, the design of the folded cone can effectively expand the impedance bandwidth, and further improve the performance of the antenna.

[0017] (2) The ultra-wideband vehicle antenna, through the design of the directed disk cone, impedance disk cone, folded cone and short-circuit column, can change the current distribution on the antenna, so that the current on the antenna surface is distributed in a traveling wave or approximately in a traveling wave, reducing the reflected current, thereby obtaining better wide-band gain characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the overall three-dimensional cross-sectional structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the antenna structure of the utility model;

[0022] Figure 4 The horizontal gain of the antenna device of the utility model is Figure 1 ;

[0023] Figure 5 The utility model provides antennas with 200 / 400 / 600 / 800 / 1000MHz spectrum diagrams;

[0024] Figure 6The utility model provides antennas with 1200 / 1400 / 1600 / 1800 / 2000MHz spectrum diagrams;

[0025] Figure 7 The utility model provides an antenna with a spectrum of 2200 / 2400 / 2600 / 2800 / 3000MHz.

[0026] Description of Figure Numbers:

[0027] 1. Fixing seat; 2. Radome; 3. Antenna structure; 31. Impedance disk cone; 32. Guide disk cone; 33. Folded cone; 34. Short-circuit column; 4. Connector.

[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0030] See also Figure 1-Figure 7 The utility model proposes an ultra-wideband vehicle antenna, including a fixing seat 1, the fixing seat 1 is made of PC, which has good corrosion resistance, heat resistance, low temperature strength and mechanical properties, and good hot processing properties such as stamping and bending. The fixing seat 1 is fixedly connected with a radome 2, the radome 1 is made of a winding glass fiber reinforced plastic tube, and an antenna structure 3 is arranged inside the radome 2;

[0031] The disc-cone antenna, the disc-shaped part is usually made of metal material, and its diameter is generally 1 / 2 or 1 / 4 of the wavelength. The center of the disc-shaped part is usually the feeding point of the antenna, through which the electromagnetic waves are input into the antenna. The cone part is a conical structure, the bottom of which is connected to the disc-shaped part and the top extends outward. The length of the cone part is generally 1 / 4 or 1 / 2 of the wavelength, and its angle is generally between 30 degrees and 60 degrees. The function of the disk-shaped part is to radiate electromagnetic waves from the disk-shaped part to form good directivity. The disk-cone antenna has very good impedance characteristics, and its impedance characteristics can be approximately expressed as Zo=601n(ctgθo / 2). In order to expand the impedance bandwidth of the disk-cone antenna, the antenna will introduce a short-circuit column 4 and a folded cone 33 when designing the antenna. After the short-circuit column 4 is introduced, the inductance and capacitance distribution of the antenna itself changes. By adjusting the position of the short-circuit column 4, the minimum value of the resonant frequency can be obtained, thereby achieving the purpose of widening the antenna to low frequency. The introduction of the folded cone 33 effectively expands the impedance bandwidth and further improves the performance of the antenna.

[0032] The antenna developed in this project has similar technical principles to the traditional disc-cone antenna. Both are based on the disc-cone antenna principle and innovatively use the folded cone 33. After a lot of simulation and actual debugging, multiple frequency bands can be covered in one antenna while greatly reducing the space occupied by the antenna. While optimizing the antenna performance, this project takes the actual environment into consideration, fully considers the reliability requirements, and incorporates this concept into the entire structural design, so that the antenna has perfect structural characteristics and can be used effectively and for a long time in various complex environments.

[0033] The antenna structure 3 includes an impedance disk cone 31, which is used as a feeding point. A guide disk cone 32 is provided below the impedance disk cone 31. The guide disk cone 32 is made of aluminum alloy. A folded cone 33 is provided below the guide disk cone 32. The folded cone 33 is made of aluminum alloy. The folded cone 33 is fixedly connected to the inner wall of the fixing seat 1, and a short-circuit column 34 is provided on the inner wall of the fixing seat 1. By introducing the short-circuit column, the inductance and capacitance distribution of the antenna itself are changed. By adjusting the position of the short-circuit column, the minimum value of the resonant frequency can be obtained, thereby achieving the purpose of widening the antenna to low frequency. A joint 4 is provided at the bottom of the folded cone 33. The material of the joint 4 is SUS316L, which is one of the austenitic stainless steels and has excellent ductility and toughness as well as good cold processing properties. In addition, due to its excellent corrosion resistance, low temperature and high temperature characteristics, the outer wall of the joint 4 is fixedly connected to the inner wall of the fixing seat 1.

[0034] In the utility model, when in use, the antenna structure is composed of a guide disk cone 32, an impedance disk cone 31, a folded cone 33 and a short-circuit post 34. Through the setting of the short-circuit post 34, the inductance and capacitance distribution of the antenna itself changes. By adjusting the position of the short-circuit post 34, the minimum value of the resonant frequency can be obtained, thereby achieving the purpose of widening the antenna to a low frequency. At the same time, the design of the folded cone 33 can effectively expand the impedance bandwidth, and further improve the performance of the antenna. At the same time, through the design of the guide disk cone 32, the impedance disk cone 31, the folded cone 33 and the short-circuit post 34, the current distribution on the antenna can be changed, so that the current on the surface of the antenna is distributed in a traveling wave or approximately in a traveling wave, reducing the reflected current, thereby obtaining a better wide-band gain characteristic.

[0035] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An ultra-wideband vehicle antenna, comprising a fixing base (1), characterized in that: The fixing seat (1) is fixedly connected to a radome (2), an antenna structure (3) is arranged inside the radome (2), and the antenna structure (3) comprises: An impedance disc cone (31), wherein a guide disc cone (32) is provided below the impedance disc cone (31); A guide disk cone (32), wherein a folded cone (33) is provided below the guide disk cone (32); A folded cone (33), wherein the folded cone (33) is fixedly connected to the inner wall of the fixing seat (1); and a short-circuit column (34), wherein the short-circuit column (34) is arranged on the inner wall of the fixing seat (1).

2. The ultra-wideband vehicle antenna according to claim 1, characterized in that: A joint (4) is provided at the bottom of the folded cone (33), and the outer wall of the joint (4) is fixedly connected to the inner wall of the fixing seat (1).

3. The ultra-wideband vehicle antenna according to claim 1, characterized in that: The material of the antenna cover (2) is a winding glass fiber reinforced plastic tube.

4. The ultra-wideband vehicle antenna according to claim 1, characterized in that: The material of the fixing seat (1) is PC.

5. The ultra-wideband vehicle antenna according to claim 1, characterized in that: The material of the guide disk cone (32) is aluminum alloy.

6. The ultra-wideband vehicle antenna according to claim 1, characterized in that: The material of the folded cone (33) is aluminum alloy.

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