Novel 64-element all-metal Vivaldi array antenna

Abstract

According to the 64-element all-metal Vivaldi array antenna provided by the invention, a multi-path space high-power synthesis technical scheme is adopted, 64 paths of 900W pulse waves are subjected to power synthesis, and high power and high gain of the pulse waves are realized through space power synthesis. The designed all-metal Vivaldi antenna keeps the original broadband characteristic, is higher in structural strength, can bear higher-power work, is suitable for various harsh working environments, and can avoid the problems of microstrip loss and the like; meanwhile, the metal thickness of the antenna is increased, so that the antenna is not easy to scan abnormally in a high-frequency band of the working bandwidth; the metal bottom plate is adopted for installation, so that return loss is further improved; the application limitation of a traditional printed Vivaldi antenna in the fields of multifunctional arrays, high-power emission and the like is broken through. The antenna has the characteristics of high efficiency, wide beam range and uniform transmitting field intensity, the transmitting antenna is stable, the attenuation is small, the tolerance power is high, a stable electric field with a large coverage area can be formed, and the antenna is suitable for a high-field-intensity radio frequency environment.

Description

Technical Field

[0001] The invention belongs to the technical field of ship communications, and in particular relates to a novel 64-element all-metal Vivaldi array antenna. Background Art

[0002] Faced with increasingly complex electromagnetic environments, various electronic devices have exposed more and more electromagnetic compatibility issues due to their own characteristics such as high precision and sensitivity. Reducing the adverse effects of the electromagnetic environment and improving the ability to adapt to complex electromagnetic environments have become urgent issues to be solved. The study of the electromagnetic environment effects of interference sources on electronic equipment in complex electromagnetic environments and experimental testing is an important research content in the development of electronic information equipment.

[0003] The transmitting antenna is an indispensable component in the electromagnetic environment effect test. It is responsible for converting the signal into the form of electromagnetic field propagation in space and irradiating the system under test to test the performance of the system under test against electromagnetic environment effects. As the requirements of electromagnetic environment effect tests continue to increase, the performance requirements for transmitting antennas are also increasing, and the research on high-power transmitting antennas has developed accordingly. In modern high-power radiation systems, transmitting antennas generally include horn antennas, parabolic antennas, flat array antennas, cylindrical omnidirectional antennas, etc. However, in the case of high gain requirements, special environments, and limited installation space, these conventional antennas will not be able to meet the system requirements, especially when the system needs to achieve a megawatt-level pulse wave output power. Due to the power tolerance limit of various microwave devices, the design concept of single feed and conventional array antennas can no longer meet the requirements, and it is also difficult to meet the scanning requirements of the beam azimuth and elevation directions. Therefore, it is necessary to adopt a multi-channel high-power signal spatial synthesis method and design a new array antenna to meet the spatial radiation requirements of the system's high-power pulse wave signals.

[0004] Vivaldi antennas are widely used in transmitting antenna arrays and high-precision direction-finding systems due to their simple structure, high bandwidth, high gain, low profile, and good directional radiation. However, traditional printed Vivaldi antennas also have some disadvantages, such as scanning blind spots and resonance caused by surface waves; waveguide transmission modes are easily formed between the medium and the base plate, resulting in reduced radiation efficiency; dielectric materials bring about losses and dispersion phenomena, which will affect the performance of the antenna; the feeding structure is relatively complex; it is difficult to expand modularly; the printed circuit board structure is relatively fragile and easy to damage; the design is complex, and the overall manufacturing and processing costs are high. Summary of the invention

[0005] In order to solve the technical problems in the prior art, the present invention provides a novel 64-element all-metal Vivaldi array antenna, including a 64-element all-metal structural Vivaldi antenna, adopting a multi-path spatial high-power synthesis technical solution, through 64-path 900W pulse wave power synthesis.

[0006] Furthermore, the radiator of a single all-metal Vivaldi antenna is entirely made of metal, and the antenna can be divided into three areas: a feeding area, a transmission area, and a radiation area.

[0007] Furthermore, the feeding part is located at the bottom of the antenna and adopts a coaxial feeding structure; the transmission zone is a curved slot line connecting the radiation zone and the feeding zone, and its end is connected to the resonant cavity; the radiation zone is composed of an exponentially gradient metal slot, which together with the other two parts constitute the antenna.

[0008] Furthermore, a metal base plate is used for installation.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] The present invention has the characteristics of high efficiency, wide beam range, and uniform transmission field strength. The transmitting antenna is stable, has low attenuation, and has high power tolerance. It can form a large and stable electric field with a large coverage area, and is suitable for high-field-strength radio frequency environments. It can improve the defects of the electromagnetic environment effect test platform on high-power transmitting antennas, improve the verification accuracy of the design results of electronic information equipment, and improve the test effects of high-peak field intensity pulse wave interference in the system level of large equipment, which is conducive to further improving the design level of the anti-electromagnetic interference capability of electronic information equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the array antenna model of the present invention;

[0012] Figure 2 This is a schematic diagram of the SMA socket installation outlet of the array antenna of the present invention;

[0013] Figure 3 is the 8 GHz gain pattern of the array antenna of the present invention;

[0014] Figure 4 is the 13 GHz gain pattern of the array antenna of the present invention;

[0015] Figure 5 is the 18 GHz gain pattern of the array antenna of the present invention;

[0016] Figure 6 This is the 8 GHz peak field intensity simulation diagram I of the present invention;

[0017] Figure 7 This is the 8GHz peak field intensity simulation diagram II of the present invention;

[0018] Figure 8 This is a 13 GHz peak field intensity simulation diagram I of the present invention;

[0019] Fig. 9 This is the 13GHz peak field intensity simulation diagram II of the present invention;

[0020] Fig.10 This is the 18 GHz peak field intensity simulation diagram I of the present invention;

[0021] Fig.11 This is the 18 GHz peak field intensity simulation diagram II of the present invention;

[0022] Fig.12 is the gain pattern of the 8 GHz array antenna of the present invention (measured);

[0023] Fig.13 is the gain pattern of the 13 GHz array antenna of the present invention (measured);

[0024] Fig.14 This is the gain pattern of the 18 GHz array antenna of the present invention (actual measurement). DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0026] like Figure 1-Figure 14 As shown, the present application proposes a 64-element all-metal Vivaldi array antenna, which is mainly composed of a 64-element all-metal structural member Vivaldi antenna. It adopts a multi-channel spatial high-power synthesis technology solution, and through 64-channel 900W pulse wave power synthesis, it greatly improves the input power capacity and beam width of the antenna, and realizes the radiation output of microwave signals. The radiator of a single all-metal Vivaldi antenna is made entirely of metal, and the antenna can be divided into three areas: a feeding area, a transmission area, and a radiation area. Among them, the feeding part is located at the bottom of the antenna and adopts a coaxial feeding structure; the transmission area is a section of a curved slot line connecting the radiation area and the feeding area, and its end is connected to the resonant cavity; the radiation area is composed of an exponentially gradient metal slot, which together with the other two parts constitutes an antenna. The designed all-metal Vivaldi antenna maintains the original broadband characteristics, and has a greater structural strength, can withstand higher power work, is suitable for various harsh working environments, and can avoid problems such as microstrip loss; at the same time, the increase in the metal thickness of the antenna makes it less likely for the antenna to have scanning anomalies in the high frequency band of the working bandwidth; the use of a metal base plate for installation further improves the return loss.

[0027] The array antenna has good performance advantages such as ultra-wideband, low cross-polarization, low side lobe, miniaturization, easy processing, etc., and has a wide unit beam width and stable and good far-field radiation performance. At the same time, it meets the requirements of electromagnetic environment effect test for high peak field strength, field strength uniformity and coverage area.

[0028] This array antenna can operate in the 8GHz-18GHz frequency band. The array antenna has good radiation effect and has the characteristics of high power, high gain, high efficiency, wide beam range and uniform transmission field strength.

[0029] The present invention adopts a multi-channel spatial high-power synthesis technical solution, 64 channels of 900W pulse wave power synthesis, and achieves high pulse wave power and high gain through spatial power synthesis;

[0030] The all-metal Vivaldi array antenna design has the characteristics of wide bandwidth, good directivity, strong structure, high power bearing, and good directional radiation;

[0031] Through the antenna array composed of 64-element all-metal Vivaldi antennas, the requirements of the electromagnetic environment effect test for stable transmitting antennas, low attenuation, high power tolerance, and strong and stable peak field are achieved, meeting the requirements of high-power pulse wave spatial radiation and field strength, uniformity, coverage area, etc. under specific test environments.

[0032] In summary, the above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereto. All equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification are within the scope covered by the patent of the present invention.

Claims

1. A new type of 64-element all-metal Vivaldi array antenna, characterized by: The Vivaldi antenna, an all-metal structure with 64 array elements, adopts a multi-channel spatial high-power synthesis technology solution and synthesizes 64 channels of 900W pulse wave power.

2. The array antenna according to claim 1, characterized in that: The radiator of a single all-metal Vivaldi antenna is made entirely of metal, and the antenna can be divided into three areas: a feeding area, a transmission area, and a radiation area.

3. The array antenna according to claim 2, characterized in that: The feeding part is located at the bottom of the antenna and adopts a coaxial feeding structure; the transmission area is a curved slot line connecting the radiation area and the feeding area, and its end is connected to the resonant cavity; the radiation area is composed of an exponentially gradient metal slot, which together with the other two parts constitute the antenna.

4. The array antenna according to claim 1, characterized in that: Metal base plate installation.

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