CN210576437U - Vivaldi antenna - Google Patents
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- CN210576437U CN210576437U CN201921224870.1U CN201921224870U CN210576437U CN 210576437 U CN210576437 U CN 210576437U CN 201921224870 U CN201921224870 U CN 201921224870U CN 210576437 U CN210576437 U CN 210576437U
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Abstract
The utility model relates to a Vivaldi antenna, insulation board A and insulation board B including cross arrangement, insulation board A top-down has set gradually first copper sheet A and second copper sheet A, insulation board B top-down has set gradually first copper sheet B and second copper sheet B, first copper sheet A and second copper sheet A pass through copper line connection, first copper sheet B and second copper sheet B pass through copper line connection, be connected with antenna feed line A on the second copper sheet A, be connected with antenna feed line B on the second copper sheet B, insulation board A and insulation board B's bottom is provided with the merit and divides the ware, insulation board A's two sides all is provided with the cell body, be provided with the through-hole on the cell body, the through-hole internalization is provided with the movable rod. The low-frequency bandwidth of the antenna can be effectively expanded, the radiation efficiency is reduced, the radiation current is weakened, the effective radiation current is increased to improve the radiation efficiency, the detachable connection is realized, the maintenance is convenient, and the cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of the radar antenna, especially, relate to a Vivaldi antenna.
Background
Radar radio (radio detection and ranging) is a device for detecting by radio, and its basic principle is that a transmitter sends a detection signal, after the signal is reflected by a distant target portion, a carrier detects the information of an object, and is detected by a sensitive receiver, and through the analysis of the received signal, the various information of the detected object is read, so the essence of the Radar is a sensor, and a device for detecting and identifying by the transmission and reception of radio waves is equivalent to the eyes and ears of people and animals, and the through-the-wall Radar is a new system Radar formed by combining the Ultra Wide Band (UWB) technology and the synthetic aperture technology in 20 th century for 90 years, and its main working principle is: the method utilizes a pulse source to generate signals, radiates the signals through a transmitting antenna, after radiated electromagnetic waves penetrate through a wall body and interact with objects behind the wall body, such as absorption, reflection, scattering and the like, information of objects interacted with an echo carrier is received by a receiving antenna, various physical information of the object carrier is calculated and displayed through an acquisition system and a complex imaging algorithm, and the adopted signal bandwidth is wide and has higher range resolution, so that accurate positioning of targets such as terrorists, hostage and the like hidden in buildings can be realized, therefore, the method is widely applied to aspects of security, rescue, military affairs, scientific archaeology and the like, under the promotion of potential markets, the through-wall radar technology is continuously developed, and the existing through-wall radar has the defects of large antenna size, low target resolution and easy misjudgment under complex environments, therefore, the Vivaldi antenna is a slot line ultra-wideband antenna and is formed by transition from a narrow slot line to a wide slot line, the slot line is changed in an exponential rule, the width of the slot line on a dielectric plate is gradually increased to form electromagnetic waves which are radiated outwards or received inwards through a horn mouth, the antenna is a high-gain and linearly polarized antenna, theoretically, the Vivaldi antenna has a wide frequency band, and can be made into an antenna with constant gain along with frequency change.
The patent number is CN201821190444.6, the application date is 2018-07-26, and a vivaldi antenna is disclosed, which relates to the technical field of communication antennas. The vivaldi antenna comprises a first antenna unit and a second antenna unit which are the same in size, wherein the first antenna unit and the second antenna unit comprise an antenna dielectric plate and a radiation patch, a first notch is formed in the upper side of the middle of a dielectric layer on the first antenna unit from top to bottom, and the radiation patch on the first antenna unit is symmetrically arranged on the upper surface of the dielectric layer by taking the first notch as a symmetry axis; a second notch is formed in the lower side of the middle of the dielectric layer on the second antenna unit from bottom to top, and the radiation patches on the second antenna unit are symmetrically arranged on the upper surface of the dielectric layer by taking the second notch as a symmetry axis; the first antenna unit and the second antenna unit are connected together in a positive cross mode.
The radiation characteristic of the antenna is optimized through the ultra-wideband balun structure; the miniaturization is realized by applying a comprehensive means for loading, and the size is reduced by more than 50% compared with the conventional means; the gain is moderate, and the PCB technology is convenient to process and integrate. There are two disadvantages, however: the antenna has the advantages that firstly, the bandwidth of the antenna is small, the current is concentrated, the current radiation is large, the antenna efficiency and the antenna gain are reduced, the vivaldi antenna ultra-wideband performance is difficult to exert better, secondly, the antenna is integrally arranged, if the vivaldi antenna ultra-wideband performance is damaged, the vivaldi antenna ultra-wideband performance needs to be integrally replaced, the vivaldi antenna and the vivaldi antenna cannot be assembled and disassembled, and the cost is increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned problem that exists among the prior art, provide a Vivaldi antenna, can its low frequency bandwidth of effectual extension, reduced radiation efficiency, weakened radiation current, increase effective radiation current and improve radiation efficiency, have the effect of widening to the low frequency bandwidth, can make insulation board B loading and unloading formula install on insulation board A simultaneously, realized the loading and unloading connection, be convenient for maintain, the cost is reduced.
In order to achieve the above purpose, the utility model adopts the following technical scheme.
A Vivaldi antenna comprises an insulation board A and an insulation board B which are arranged in a crossed mode, wherein the insulation board A is sequentially provided with a first copper sheet A and a second copper sheet A from top to bottom, the insulation board B is sequentially provided with a first copper sheet B and a second copper sheet B from top to bottom, the first copper sheet A and the second copper sheet A are connected through copper wires, the first copper sheet B and the second copper sheet B are connected through copper wires, a plurality of first notches A are formed in the first copper sheet A, a plurality of second notches A are formed in the second copper sheet B, a plurality of first notches B are formed in the first copper sheet B, a plurality of second notches B are formed in the second copper sheet B, an antenna feeder A is connected to the second copper sheet A, an antenna feeder B is connected to the second copper sheet B, power dividers are arranged at the bottom ends of the insulation board A and the insulation board B, one output port of each power divider is connected with the antenna feeder A, antenna feeder B is connected to another delivery outlet, insulation board A's both sides all are provided with the cell body, be provided with the through-hole on the cell body, the activity is provided with the movable rod in the through-hole, be connected with the pressure spring between movable rod and the cell body, insulation board B is two, be connected with the card body corresponding with the cell body on the insulation board B, be provided with the constant head tank corresponding with the movable rod on the card body.
The insulation board A and the insulation board B are arranged in a crossed mode to form a 90-degree included angle, the first copper sheet A and the second copper sheet A cover two ends of the insulation board A, and the first copper sheet B and the second copper sheet B cover two ends of the insulation board B.
The thickness of the first copper sheet A, the second copper sheet A, the first copper sheet B and the second copper sheet B is T, and T =1 mm.
The opening width of the first notch A, the second notch A, the first notch B and the second notch B is K, and K =1.8 mm.
The distance between the first notch A is M, the distance between the second notch A is M, the distance between the first notch B is M, the distance between the second notch B is M, and M =3.2 mm.
The height of insulating board A and insulating board B is L, width is D, thickness is T, L =108mm, D =81mm, T =1 mm.
The antenna feed line A and the antenna feed line B comprise three-stage resistors, and the three-stage resistors are respectively R1=300ohm, R2=270ohm and R3=120 ohm.
The movable rod is connected with a limiting block, and the limiting block is arranged between the clamping body and the through hole.
Adopt the utility model has the advantages of.
1. The antenna has the advantages that the structure loading mode is realized by adopting the metal copper sheet, the effect of prolonging the electrical length of the antenna is achieved, the current can smoothly pass through the antenna, the influence on the bandwidth of the antenna caused by the direct reflection of the current is avoided, the reflected current of the antenna can still be reflected after the antenna is prolonged, the matching of the bandwidth of a system and the antenna is influenced, the reflected current is absorbed by using a resistance loading mode through an antenna feeder line, the bandwidth of the antenna is increased, the comprehensive consideration is comprehensively considered, the resistance Res = about 100ohm, the overall characteristic is optimal, the low-frequency bandwidth of the antenna can be effectively expanded by resistance loading and structure loading, the gain of the antenna is reduced by the application of the resistance in the antenna feeder line, the radiation efficiency is reduced, the radiation current is weakened, the current distribution is changed through a plurality of notches, the effective radiation current is increased to improve the radiation efficiency, meanwhile, the slotting, the improvement of antenna efficiency and antenna gain, bring out the better performance of vivaldi antenna ultra wide band, simultaneously through insulation board A's both ends installation cell body, the cell body is emboliaed to the card body of connecting on insulation board B, the activity pole compresses tightly the card body on insulation board A under the effect of pressure spring, fix insulation board B on insulation board A, if damage need change the insulation board, outwards stimulate the pressure spring, make the activity pole break away from the card body, to cell body opening direction roll-off card body, thereby make insulation board B break away from insulation board A, the loading and unloading formula connection has been realized, and the maintenance is convenient for, and the cost is reduced.
2. The two beams of microwaves form a 90-degree phase difference after being arranged in a crossed mode, namely, the two beams of microwaves are orthogonal to each other, and then circularly polarized waves are formed to realize circular polarization.
3. Through three-stage resistance, according to the Wilkinson power divider design theory, a 0.8GHz-3GHz broadband power divider needs to be designed, and three stages of power dividers need to be designed
The structure, load tertiary resistance balanced resistance, adopt FR-4 material, panel thickness 1mm, tertiary resistance is respectively R1=300ohm, R2=270ohm, R3=120 ohm.
4. The movable rod is prevented from being separated from the groove body by the limiting block.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic size diagram of the present invention.
FIG. 3 is a schematic view of the structure at I in FIG. 2.
FIG. 4 is a graph of reflection coefficient and bandwidth of an ultra-wideband Vivaldi through-the-wall radar antenna.
Fig. 5 is a graph of the reflection coefficient and bandwidth of a circularly polarized array antenna.
The labels in the figure are: 1. insulation board A, 2, insulation board B, 3, power divider, 4, first copper sheet A, 5, second copper sheet A, 6, first notch A, 7, second notch A, 8, antenna feeder A, 9, antenna feeder B, 10, first copper sheet B, 11, second copper sheet B, 12, first notch B, 13, second notch B, 14, cell body, 15, movable rod, 16, pressure spring, 17, through-hole, 18, card body, 19, stopper, 20, constant head tank.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 3, a Vivaldi antenna comprising an insulating plate a1 and an insulating plate B2 arranged crosswise, characterized in that: the insulation board A1 is sequentially provided with a first copper sheet A4 and a second copper sheet A5 from top to bottom, the insulation board B2 is sequentially provided with a first copper sheet B10 and a second copper sheet B11 from top to bottom, the first copper sheet A4 is connected with the second copper sheet A5 through copper wires, the first copper sheet B10 is connected with the second copper sheet B11 through copper wires, the first copper sheet A4 is provided with a plurality of first notches A6, the second copper sheet B11 is provided with a plurality of second notches A7, the first copper sheet B10 is provided with a plurality of first notches B12, the second copper sheet B11 is provided with a plurality of second notches B13, the second copper sheet A5 is connected with an antenna feeder line A8, the second copper sheet B11 is connected with an antenna feeder line B9, the bottom ends of the insulation board A1 and the insulation board B2 are provided with a power divider 3, one output port of the power divider 3 is connected with the antenna A8, and the other output port of the antenna 9 is connected with an antenna 39b 9, the two sides of insulation board A all are provided with cell body 14, be provided with through-hole 17 on the cell body 14, the through-hole 17 internalization is provided with movable rod 15, be connected with pressure spring 16 between movable rod 15 and the cell body 14, insulation board B2 is two, be connected with the card body 18 corresponding with cell body 14 on the insulation board B2, be provided with the constant head tank 20 corresponding with movable rod 15 on the card body 18.
The signal is divided into two paths by the power divider 3, the two paths of signals output by the power divider respectively enter the antenna feeder line A8 and the antenna feeder line B, the two paths of signals are transmitted by the copper sheet antenna, the effect of prolonging the electrical length of the antenna is achieved by adopting a metal copper sheet to realize the structural loading mode, the current can smoothly pass through the power divider, the direct reflection of the current is avoided from influencing the bandwidth of the antenna, the reflected current can still reflect back after the antenna is prolonged, the matching of the bandwidth of the system and the antenna is influenced, the reflected current is absorbed by using a resistance loading mode through the antenna feeder line to increase the bandwidth of the antenna, the overall characteristic is optimal by comprehensively considering that the resistance Res = about 100ohm, the low-frequency bandwidth of the antenna can be effectively expanded by resistance loading and structural loading, but the application of the resistance in the antenna feeder line reduces the gain of the antenna, the radiation efficiency, the current distribution is changed through a plurality of notches, the effective radiation current is increased to improve the radiation efficiency, meanwhile, the notches are equivalent to the increase of the current radiation length, the low-frequency bandwidth is widened, the antenna efficiency and the antenna gain are improved, the ultra-wideband performance of the vivaldi antenna is better exerted, meanwhile, the two ends of the insulating plate A1 are provided with the groove bodies, the clamping body connected with the insulating plate B2 is sleeved into the groove bodies, the movable rod 15 compresses the clamping body 18 on the insulating plate A1 under the action of the pressure spring 16, the insulating plate B2 is fixed on the insulating plate A1, if the insulating plate is damaged and needs to be replaced, the pressure spring 16 is pulled outwards, the movable rod 15 is separated from the clamping body 18 and slides out of the clamping body towards the opening direction of the groove body 14, so that the insulating plate B2 is separated from the insulating plate A1, the detachable connection is realized, the maintenance is facilitated.
Example 2
As shown in fig. 1 to 3, a Vivaldi antenna comprising an insulating plate a1 and an insulating plate B2 arranged crosswise, characterized in that: the insulation board A1 is sequentially provided with a first copper sheet A4 and a second copper sheet A5 from top to bottom, the insulation board B2 is sequentially provided with a first copper sheet B10 and a second copper sheet B11 from top to bottom, the first copper sheet A4 is connected with the second copper sheet A5 through copper wires, the first copper sheet B10 is connected with the second copper sheet B11 through copper wires, the first copper sheet A4 is provided with a plurality of first notches A6, the second copper sheet B11 is provided with a plurality of second notches A7, the first copper sheet B10 is provided with a plurality of first notches B12, the second copper sheet B11 is provided with a plurality of second notches B13, the second copper sheet A5 is connected with an antenna feeder line A8, the second copper sheet B11 is connected with an antenna feeder line B9, the bottom ends of the insulation board A1 and the insulation board B2 are provided with a power divider 3, one output port of the power divider 3 is connected with the antenna A8, and the other output port of the antenna 9 is connected with an antenna 39b 9, the two sides of insulation board A all are provided with cell body 14, be provided with through-hole 17 on the cell body 14, the through-hole 17 internalization is provided with movable rod 15, be connected with pressure spring 16 between movable rod 15 and the cell body 14, insulation board B2 is two, be connected with the card body 18 corresponding with cell body 14 on the insulation board B2, be provided with the constant head tank 20 corresponding with movable rod 15 on the card body 18.
The insulation board A1 and the insulation board B2 are arranged in a crossed mode to form a 90-degree included angle, the first copper sheets A4 and the second copper sheets A5 cover two ends of the insulation board A1, and the first copper sheets B10 and the second copper sheets B11 cover two ends of the insulation board B2.
The thicknesses of the first copper sheet A4, the second copper sheet A5, the first copper sheet B10 and the second copper sheet B11 are T, and the T =1 mm.
The opening widths of the first notch a6, the second notch a7, the first notch B12, and the second notch B13 are K, which K =1.8 mm.
A distance between the first notches a6 is M, a distance between the second notches a7 is M, a distance between the first notches B12 is M, a distance between the second notches B13 is M, and M =3.2 mm.
The insulating plate A1 and the insulating plate B2 are L in height, D in width and T in thickness, and L =108mm, D =81mm and T =1 mm.
The antenna feed line A8 and the antenna feed line B9 include three levels of resistance, which are R1=300ohm, R2=270ohm, R3=120ohm, respectively.
The movable rod 15 is connected with a limiting block 19, and the limiting block 19 is arranged between the clamping body 18 and the through hole (17).
The antenna has the advantages that the structure loading mode is realized by adopting the metal copper sheet, the effect of prolonging the electrical length of the antenna is achieved, the current can smoothly pass through the antenna, the influence on the bandwidth of the antenna caused by the direct reflection of the current is avoided, the reflected current of the antenna can still be reflected after the antenna is prolonged, the matching of the bandwidth of a system and the antenna is influenced, the reflected current is absorbed by using a resistance loading mode through an antenna feeder line, the bandwidth of the antenna is increased, the comprehensive consideration is comprehensively considered, the resistance Res = about 100ohm, the overall characteristic is optimal, the low-frequency bandwidth of the antenna can be effectively expanded by resistance loading and structure loading, the gain of the antenna is reduced by the application of the resistance in the antenna feeder line, the radiation efficiency is reduced, the radiation current is weakened, the current distribution is changed through a plurality of notches, the effective radiation current is increased to improve the radiation efficiency, meanwhile, the slotting, the improvement of antenna efficiency and antenna gain, bring out the better performance of vivaldi antenna ultra wide band, simultaneously through the both ends installation cell body of insulation board A1, the card body of connecting on insulation board B2 embolias the cell body, movable rod 15 compresses tightly card body 18 on insulation board A1 under the effect of pressure spring 16, fix insulation board B2 on insulation board A1, if damage the insulation board that needs to be changed, outwards stimulate pressure spring 16, make movable rod 15 break away from card body 18, to the cell body 14 opening direction roll-off card body, thereby make insulation board B2 break away from insulation board A1, realized the loading and unloading type and connected, be convenient for maintenance, the cost is reduced.
The two beams of microwaves form a 90-degree phase difference after being arranged in a crossed mode, namely, the two beams of microwaves are orthogonal to each other, and then circularly polarized waves are formed to realize circular polarization.
Through three-stage resistance, according to the Wilkinson power divider design theory, a 0.8GHz-3GHz broadband power divider needs to be designed, and three stages of power dividers need to be designed
The structure, load tertiary resistance balanced resistance, adopt FR-4 material, panel thickness 1mm, tertiary resistance is respectively R1=300ohm, R2=270ohm, R3=120 ohm.
The movable rod 15 is prevented from separating from the groove body by the limiting block 19.
And determining the length and the width of the Vivaldi antenna according to the basic theory of the Vivaldi antenna, calculating variables in the expression according to the size of the antenna and the function expression of the slot line after determining the size of the antenna, and establishing an antenna model. Vivaldi antennas are end-fire antennas that feed electromagnetic waves that radiate mainly forward through the slot line opening, so that the aperture and bandwidth are relevant.
Since the radiator part of the Vivaldi antenna is exponentially graded, the pure radiator part is incomplete as an antenna and its feed structure is necessary. According to the theory of coupling of slot line and microstrip line, the basic structure of microstrip line-slot line feed is that the back of the antenna is an open-ended microstrip line, the front of the antenna is a short-ended slot line, the microstrip line is perpendicular to the slot line and passes through the slot line, the center of the superposition of the microstrip line and the slot line is a coupling part, the length of the extended part of the open-ended microstrip line passing through the slot line is one fourth of the guided wave wavelength of the microstrip line, and the length of the extended part of the short-ended slot line on the other side.
According to the design theory calculation of Vivaldi, the antenna size is too large and is not beneficial to engineering application, so that the improved Vivaldi antenna is designed by combining the technologies of resistance loading, structure loading, slot slotting and the like.
The principle of structure loading is that a metal copper sheet is loaded at the tail end of the antenna, so that the electrical length of the antenna is prolonged, the current can smoothly pass through the antenna, the influence of direct reflection of the current on the bandwidth of the antenna is avoided, the electrical characteristics of the structure loading and the size requirement in practical engineering are integrated, and the size LA1=35mm of the loading structure is selected.
Due to direct structural loading, the electrical length of the antenna is only prolonged, and the reflected current is still reflected back to influence the bandwidth of the system and the matching of the antenna, so that the reflected current can be absorbed in a resistance loading mode to increase the bandwidth of the antenna, and the overall characteristic is optimal by taking the resistance Res =100ohm or so in comprehensive consideration. According to the Wilkinson power divider design theory, a 0.8GHz-3GHz broadband power divider is required to be designed, and three stages of power dividers are also required to be designed
And structurally, a three-level resistance balance resistor is loaded. The FR-4 material is adopted, the thickness of the plate is 1mm, and the three-stage resistance is respectively R1=300ohm, R2=270ohm and R3=120 ohm.
The low-frequency bandwidth of the antenna can be effectively expanded through resistance loading and structural loading, but the gain of the antenna is reduced through the application of the resistance, the radiation efficiency is reduced, and the radiation current is weakened. From antenna theory it is known that the transverse current radiation pattern is forward and the longitudinal current radiation pattern is horizontal. Because the antenna is required to mainly radiate forward, the current distribution can be changed by slotting, and the effective radiation current is increased to improve the radiation efficiency. Meanwhile, slotting is equivalent to increasing the current radiation length, which has a certain broadening effect on the low-frequency bandwidth.
And (3) theoretically analyzing various parameters of the antenna, integrating the requirements of practical engineering application, and compromising various parameters in the antenna model to obtain a final design model, wherein the final size is within the range of 81mm multiplied by 108mm, and the bandwidth covers 0.6GHz-3.5 GHz. The main component parameters are antenna length La =60mm, width Wa =81mm, gradual change curvature a =0.2, structure loading length Lb =35mm, and reflection coefficient and impedance bandwidth are shown in FIG. 4, it can be seen that the reflection coefficient is below-10 dB meeting engineering requirements from 0.6GHz-3.5GHz, and the relative bandwidth can reach 141.46%, and the wide bandwidth completely covers the spectrum bandwidth of the through-wall radar signal waveform, so that the method is suitable for the actual engineering design of the system.
The circularly polarized antenna has unique advantages, and particularly in the detection field, it is necessary to search the technology in detail, which is the field of ultra-wideband impulse radar. The circularly polarized array antenna designed finally consists of two linear polarized unit antennas, is designed in an orthogonal mode, and is combined with an equal common feed network with 90-degree phase shift, and the 90-degree phase shift of the structure passes through
The microstrip line is used for processing and manufacturing the designed circularly polarized array antenna, and testing the performance of the circularly polarized array antenna, wherein a specific data chart is shown in fig. 5.
Because the unit bandwidth of the antenna is extremely wide, the bandwidth of the feed network also reaches the bandwidth of 6 frequency multiplication, and the impedance bandwidth of the antenna is optimistic theoretically; the actual measurement result is generally consistent with the simulation curve, the high frequency part has deviation, the high frequency bandwidth is lower than the simulation data and is probably caused by the later processing error, but the whole frequency band covers 0.53GHz-2.88GHz, the relative bandwidth reaches 137.8%, the theoretical analysis and prediction are verified, and the impedance bandwidth meets the system requirement.
According to the method, firstly, the wave spectrum of an impulse radar pulse source is combined with the attenuation characteristic of electromagnetic waves in a wall, and the frequency band range of an antenna to be designed is analyzed in detail; secondly, detailed analysis is carried out according to the type and the structure of the traditional ultra-wideband antenna, a Vivaldi antenna is selected as a research object, and a large amount of analysis work is carried out on the superior and inferior performance of the antenna; for the Vivaldi antenna, optimizing the radiation bandwidth and S parameters of the antenna through resistance loading and structural loading; the feeder line part is optimized, a simpler resistance loading feed structure is provided, and the design coverage bandwidth is 0.56 GHz-3.5 GHz. In addition, the circular polarization technology is studied in detail, and a circular polarization array Vivaldi antenna is designed. The characteristics of impedance bandwidth, gain and the like of the radar are tested and analyzed in detail through experiments, and the radar has good characteristics and can be well applied to a through-the-wall radar system.
Antenna feed line A8 and antenna feed line B9 are resistance loading antenna feed structure, and the utility model patent of the name "a directional plate-like antenna feed structure of single polarization" is adopted, and patent application number is "CN 200420083284.7".
The power divider 3 is a Wilkinson power divider with one division into two parts, and adopts the utility model invention patent named ultra wide band Wilkinson power divider, and the patent application number is CN 201710225684.9.
The insulating plate A1 and the insulating plate B2 are yellow 4203PCB drilling pad transformer insulating plates and are made of epoxy resin.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.
Claims (8)
1. A Vivaldi antenna, includes insulating board A (1) and insulating board B (2) of cross arrangement, its characterized in that: the insulation board A (1) is sequentially provided with a first copper sheet A (4) and a second copper sheet A (5) from top to bottom, the insulation board B (2) is sequentially provided with a first copper sheet B (10) and a second copper sheet B (11) from top to bottom, the first copper sheet A (4) and the second copper sheet A (5) are connected through copper wires, the first copper sheet B (10) and the second copper sheet B (11) are connected through copper wires, a plurality of first notches A (6) are arranged on the first copper sheet A (4), a plurality of second notches A (7) are arranged on the second copper sheet B (11), a plurality of first notches B (12) are arranged on the first copper sheet B (10), a plurality of second notches B (13) are arranged on the second copper sheet B (11), an antenna feed line A (8) is connected to the second copper sheet A (5), and an antenna feed line B (9) is connected to the second copper sheet B (11), the utility model discloses a cell body, including insulation board A (1) and insulation board B (2), the bottom of insulation board A (1) and insulation board B (2) is provided with merit and divides ware (3), antenna feeder A (8) is connected to an delivery outlet that the ware (3) was divided to the merit, and antenna feeder B (9) is connected to another delivery outlet, insulation board A's both sides all are provided with cell body (14), be provided with through-hole (17) on cell body (14), through-hole (17) internalization is provided with movable rod (15), be connected with pressure spring (16) between movable rod (15) and cell body (14), insulation board B (2) are two, be connected with the card body (18) corresponding with cell body (14) on insulation board B (2), be provided with on the card body (18) with movable rod (15.
2. A Vivaldi antenna as claimed in claim 1, wherein: the insulation board A (1) and the insulation board B (2) are arranged in a crossed mode to form a 90-degree included angle, the first copper sheet A (4) and the second copper sheet A (5) cover two ends of the insulation board A (1), and the first copper sheet B (10) and the second copper sheet B (11) cover two ends of the insulation board B (2).
3. A Vivaldi antenna as claimed in claim 1, wherein: the thickness of the first copper sheet A (4), the second copper sheet A (5), the first copper sheet B (10) and the second copper sheet B (11) is T, and T =1 mm.
4. A Vivaldi antenna as claimed in claim 1, wherein: the opening widths of the first notch A (6), the second notch A (7), the first notch B (12) and the second notch B (13) are K, and K =1.8 mm.
5. A Vivaldi antenna as claimed in claim 1, wherein: a distance between the first notches a (6) is M, a distance between the second notches a (7) is M, a distance between the first notches B (12) is M, a distance between the second notches B (13) is M, and M =3.2 mm.
6. A Vivaldi antenna as claimed in claim 1, wherein: the height of the insulating plate A (1) and the insulating plate B (2) is L, the width of the insulating plate B is D, the thickness of the insulating plate B is T, and L =108mm, D =81mm and T =1mm 2.
7. A Vivaldi antenna as claimed in claim 1, wherein: the antenna feed line a (8) and the antenna feed line B (9) include three-level resistances, which are R1=300ohm, R2=270ohm, and R3=120ohm, respectively.
8. A Vivaldi antenna as claimed in claim 1, wherein: the movable rod (15) is connected with a limiting block (19), and the limiting block (19) is arranged between the clamping body (18) and the through hole (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921224870.1U CN210576437U (en) | 2019-07-31 | 2019-07-31 | Vivaldi antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921224870.1U CN210576437U (en) | 2019-07-31 | 2019-07-31 | Vivaldi antenna |
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| Publication Number | Publication Date |
|---|---|
| CN210576437U true CN210576437U (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921224870.1U Active CN210576437U (en) | 2019-07-31 | 2019-07-31 | Vivaldi antenna |
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| Country | Link |
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| CN (1) | CN210576437U (en) |
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2019
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