CN205488517U - Radar antenna is warp to butterfly - Google Patents
Radar antenna is warp to butterfly Download PDFInfo
- Publication number
- CN205488517U CN205488517U CN201620098243.8U CN201620098243U CN205488517U CN 205488517 U CN205488517 U CN 205488517U CN 201620098243 U CN201620098243 U CN 201620098243U CN 205488517 U CN205488517 U CN 205488517U
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- 230000005855 radiation Effects 0.000 claims abstract description 57
- 230000007704 transition Effects 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 230000005284 excitation Effects 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 9
- 239000002184 metal Substances 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 9
- 201000010099 disease Diseases 0.000 description 4
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 208000032365 Electromagnetic interference Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
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- 238000009440 infrastructure construction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model discloses a radar antenna is warp to butterfly, radiation arm symmetry is printed and is constituted plane dipole antenna in insulating medium plate's front, the upper portion of this radiation arm is the triangle -shaped structure, the lower part is the rectangle structure, the triangle -shaped structure is the circular arc transition with the junction of rectangle structure, leave the interval between two radiation arms, be equipped with the feed end of input port as the antenna on two radiation arms of neighbouring spaced respectively, the rectangle structure base both sides of two radiation arms are connected with loading resistance respectively, the other end of this loading resistance is connected constitution loading return circuit with the rectangle shielding cavity, the four sides of rectangle shielding cavity pass through the nut with insulating medium plate's border to be fixed. The utility model discloses a shorten radiation arm transverse dimension, loading resistance and metal rectangle shielding cavity and realized wide band characteristic and good time domain radiation characteristic to antenna body is long -pending less, and easily on -vehicle ultra wide band radar system's installation requirement is satisfied in the miniaturization of radar.
Description
Technical Field
The utility model belongs to the technical field of broadband formation of image radar antenna, concretely relates to butterfly warp radar antenna.
Background
In recent years, with the continuous development of old urban area transformation, urban road and underground pipe network infrastructure and other infrastructure construction, the ultra-wideband radar detection technology is beginning to be widely applied in the industries of geophysical research, municipal engineering, road disease detection and the like. The ultra-wideband radar detection technology has the advantages of high resolution, strong penetration capacity, low interception rate, strong anti-interference performance and the like, can realize non-contact detection of non-uniform medium structures such as urban road underground cavities, metal pipe networks, drainage systems and the like, and has the characteristics of no damage to detected media and the like. The characteristics enable the ultra-wideband radar to be more and more popular in the aspects of municipal construction and daily detection and supervision of urban road potential safety hazards.
An ultra-wideband radar system is generally composed of an antenna, a transmitter and a receiver. As a key component for transmitting and receiving electromagnetic waves, the design of the ultra-wideband antenna is an important link, and the performance of the antenna directly influences the imaging and positioning quality of the radar. Due to the influence of the surface material properties, scattering interference of different media, uncertainty of a target position, weaker target echo from the deeper ground, and the like, the antenna is required to have the characteristics of time domain fidelity, high gain, super bandwidth, good directionality, and the like, and is also required to be easy to manufacture and small in size so as to meet the practical engineering application.
At present, widely used broadband antennas in ultra-wideband radars comprise bow-tie antennas loaded by resistance and capacitance, transverse electromagnetic wave horn antennas, Vivaldi antennas and the like, ports of loaded bow-tie antennas are well matched, tail oscillation of radiation waveforms is small, antenna radiation efficiency is poor and is generally below 30%, and actual detection distance of the radars can be influenced due to the fact that amplitude of transmitted signals generated by a transmitter is limited. The transverse electromagnetic wave horn antenna and the Vivaldi antenna have good directivity and high gain, but have poor near-ground coupling characteristics, and the transverse size and the longitudinal size of the antennas are large, so that the transverse electromagnetic wave horn antenna and the Vivaldi antenna are not beneficial to the miniaturization of a system and the vehicle-mounted requirement.
Disclosure of Invention
The utility model provides a technical problem provide a can satisfy butterfly deformation radar antenna of the on-vehicle ultra wide band radar demand of urban road.
The utility model adopts the following technical scheme for solving the technical problems, the butterfly-shaped deformation radar antenna is characterized by comprising a rectangular shielding cavity, an insulating dielectric plate, two radiation arms, four loading resistors and an input port, wherein the two radiation arms are symmetrically printed on the front surface of the insulating dielectric plate to form a planar dipole antenna, the upper part of each radiation arm is of a triangular structure, the lower part of each radiation arm is of a rectangular structure, the joint of the triangular structure and the rectangular structure is in circular arc transition, the opening angle at the top of the triangular structure is not less than 90 degrees, a space is reserved between the two radiation arms, the two radiation arms adjacent to the space are respectively provided with the input port as the feed end of the antenna, the input port is connected with an external excitation signal source, signals are transmitted to the two radiation arms through the input ports and radiate to the space through the radiation arms, the two sides of the bottom edges of the rectangular structures of the, the other end of the loading resistor is connected with a rectangular shielding cavity to form a loading loop, the rectangular shielding cavity is a rectangular cavity with an opening at one side, and four sides of the rectangular shielding cavity are fixed with the edge of the insulating medium plate through nuts.
More preferably, the radiation arm is made of brass, gold, aluminum or iron.
Preferably, the insulating medium plate is made of an epoxy resin glass fiber cloth laminated plate, and the thickness of the insulating medium plate is 1-2 mm.
Preferably, the rectangular shielding cavity is made of aluminum, has a thickness of 1mm, and has a height of 0.315 times of a free space wavelength corresponding to the central frequency of the antenna.
Further preferably, the opening angle of the top of the triangular structure of the radiation arm is between 90 and 100 degrees.
The utility model discloses an integrated in on-vehicle urban road underground disease body ultra wide band detection radar system of butterfly shape deformation radar antenna, this antenna has realized wide band characteristic and good time domain radiation characteristic through shortening horizontal size of radiation arm, loading resistance and metal rectangle shielding chamber to the antenna volume is less, and the miniaturization of easy radar satisfies the installation requirement of on-vehicle ultra wide band radar system.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a voltage standing wave ratio curve of the present invention;
fig. 3 is the time domain radiation wave curve at the 2m position of the present invention.
In the figure: 11. the antenna comprises a first radiating arm, 12, a second radiating arm, 21, a first loading resistor, 22, a second loading resistor, 23, a third loading resistor, 24, a fourth loading resistor, 3, a rectangular shielding cavity, 4, an insulating dielectric plate, 5 and an input port.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
It should be noted that in the drawings or description, the same drawing reference numerals are used for similar or identical parts. Implementations not depicted or described in the drawings are of a form known to those of ordinary skill in the art. Additionally, while exemplifications of parameters including particular values may be provided herein, it is to be understood that the parameters need not be exactly equal to the respective values, but may be approximated to the respective values within acceptable error margins or design constraints. Directional phrases used in the embodiments, such as "upper," "lower," "front," "rear," "left," "right," and the like, refer only to the orientation of the figure. Therefore, the directional terminology used is intended to be in the nature of words of description rather than of limitation.
Fig. 1 is according to the utility model discloses butterfly-shaped deformation radar antenna's schematic structure diagram, as shown in fig. 1, this butterfly-shaped deformation radar antenna includes insulating dielectric plate 4, first radiation arm 11, second radiation arm 12, input port 5, first loading resistance 21, second loading resistance 22, third loading resistance 23, fourth loading resistance 24 and a rectangle shielding chamber 3, wherein:
The first radiation arm 11 and the second radiation arm 12 are made of metal, preferably metal such as brass, gold, aluminum, and iron. The two radiation arms are symmetrically printed on the front surface of the insulating dielectric plate 4 by a circuit board printing technology to form a planar dipole antenna. The lower parts of the first radiation arm 11 and the second radiation arm 12 are in a rectangular structure, the upper parts of the first radiation arm and the second radiation arm are in a triangular structure, and the connection part of the triangular structure and the rectangular structure is in arc transition so as to reduce the transverse size of the antenna and avoid the generation of current discontinuous points. The widths of the two radiation arms can be adjusted according to the antenna size requirement so as to meet the overall performance requirement of the system and the length of the radiation armslOpening angleθSatisfies the following conditions:
；，
wherein,λ lthe low frequency cut-off frequency for the antenna corresponds to the free space wavelength,in order to obtain the opening angle of the radiation arm,Z cis the characteristic impedance of the antenna.
The first radiating arm 11 and the second radiating arm 12 form a planar dipole antenna, a space is reserved between the two radiating arms, the two adjacent spaced radiating arms are respectively provided with an input port 5 serving as a feed end of the antenna, and the two radiating arms are separated by a first preset distance of 2 mm. The distance between the two radiating arms can be adjusted by those skilled in the art according to the antenna specification requirements such as input impedance.
The resistance values of the first loading resistor 21, the second loading resistor 22, the third loading resistor 23 and the fourth loading resistor 24 are all about 220 Ω, and the resistance values and the number of the resistors can be adjusted according to actual needs. One end of each of the first loading resistor 21 and the second loading resistor 22 is welded to two sides of the bottom edge of the first radiating arm 11, and the other end is connected to the side wall of the rectangular shielding cavity 3; the third loading resistor 23 and the fourth loading resistor 24 are connected with the bottom edge of the second radiation arm 12 and the side wall of the rectangular shielding cavity 3 to form a loading loop, so that the cutoff reflected current on the radiation arm can be effectively reduced, and the pulse tailing is further inhibited.
The insulating dielectric plate 4 is made of epoxy resin glass fiber cloth laminated board, the thickness of the insulating dielectric plate is about 1-2mm, and the length and the width of the insulating dielectric plate are determined by the size of the antenna body.
The rectangular shielding cavity 3 is made of metal, preferably aluminum. The shielding cavity is a rectangular cavity with an opening at one end, the opening surface is used for installing the insulating dielectric plate 4 and is parallel to the bottom surface of the metal shielding cavity, and the edge of the insulating dielectric plate 4 is fixed with the opening surface of the rectangular shielding cavity 3 through a nut. The thickness of the rectangular shielding cavity 3 is about 1mm, the height H of the rectangular shielding cavity is about 0.315 times of the free space wavelength corresponding to the central frequency of the antenna, and technicians of the length and the width can properly adjust the rectangular shielding cavity according to the size of the insulating dielectric plate so as to ensure that the antenna has light weight, good directional radiation capability and strong capability of resisting various external complex electromagnetic interferences.
When the butterfly-shaped deformation radar antenna works, the input port 5 is connected with an external excitation signal source, signals are transmitted to the first radiation arm 11 and the second radiation arm 12 through the input port and are radiated to a space through the two radiation arms, and the function of urban road underground disease body detection imaging is achieved.
When the metal radiation arm 11 and the metal radiation arm 12 are manufactured, firstly, the opening angle of the butterfly antenna arm is a large opening angle which is not less than 90 degrees, the value of the opening angle is between 90 degrees and 100 degrees, the triangular structure is kept unchanged within a distance close to the input port 5, and the top angles at two sides of the triangular structure are cut off, so that the transverse size of the antenna is effectively reduced. The edges and corners are subjected to circular arc treatment, so that the generation of current discontinuous points is avoided. After treatment, the radiation arm forms a butterfly-shaped deformation antenna with a rectangular lower part, a triangular upper part and a circular arc transition at the joint of the triangular structure and the rectangular structure.
As shown in fig. 2, it is a voltage standing wave ratio curve diagram of the butterfly-shaped deformation radar antenna according to the present invention. In the figure, the abscissa represents the frequency variation in MHz; the ordinate represents the amplitude variable. In the embodiment, the voltage standing wave coefficient of the antenna is less than 1.8 in the frequency band range of 10MHz-200 MHz. According to on-vehicle ultra wide band radar antenna of general urban road uses standing-wave ratio coefficient to be less than 2, can know at 10MHz-200MHz frequency band within range the utility model discloses the antenna all can satisfy operation requirement well.
As shown in fig. 3, a graph of time domain radiation waveform at 2m position of the butterfly-shaped deformation radar antenna according to the present invention. In the figure, the abscissa represents a time variable in ns; the ordinate represents the electric field strength in units of V/m. As can be seen from the figure, the time domain radiation waveform oscillation tail of the butterfly deformation radar antenna is very small, the duration is less than half of the pulse width, the oscillation level is lower than 10%, and the time domain radiation characteristic is good.
To sum up, the utility model provides a butterfly shape warp radar antenna has good time domain fidelity, less oscillation tailing, simple feed mode, compact antenna size, and the miniaturization integration and the vehicle of easy radar load satisfy urban road underground disease body radar system's detection distance and required precision, the industrialization production of also being convenient for simultaneously.
The foregoing shows and describes the general principles of the present invention, with its principal features and advantages, and further, various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The butterfly-shaped deformation radar antenna is characterized by comprising a rectangular shielding cavity, an insulating dielectric plate, two radiation arms, four loading resistors and an input port, wherein the two radiation arms are symmetrically printed on the front surface of the insulating dielectric plate to form a planar dipole antenna, the upper parts of the radiation arms are of triangular structures, the lower parts of the radiation arms are of rectangular structures, the joints of the triangular structures and the rectangular structures are in arc transition, the opening angle of the top of each triangular structure is not less than 90 degrees, a space is reserved between the two radiation arms, the two adjacent spaced radiation arms are respectively provided with the input port as a feed end of the antenna, the input port is connected with an external excitation signal source, signals are transmitted to the two radiation arms through the input ports and radiate towards the space through the radiation arms, the two sides of the bottom edges of the rectangular structures of the two radiation arms are respectively connected with the loading resistors, and the other ends of the loading resistors are connected, the rectangular shielding cavity is a rectangular cavity with an opening at one side, and four sides of the rectangular shielding cavity are fixed with the edge of the insulating medium plate through nuts.
2. The bowtie radar antenna of claim 1, wherein: the radiation arm is made of brass, gold, aluminum or iron.
3. The bowtie radar antenna of claim 1, wherein: the insulating medium plate is made of an epoxy resin glass fiber cloth laminated plate, and the thickness of the insulating medium plate is 1-2 mm.
4. The bowtie radar antenna of claim 1, wherein: the rectangular shielding cavity is made of aluminum materials, the thickness of the rectangular shielding cavity is 1mm, and the height of the rectangular shielding cavity is 0.315 times of the free space wavelength corresponding to the central frequency of the antenna.
5. The bowtie radar antenna of claim 1, wherein: the opening angle of the top of the triangular structure of the radiation arm is between 90 and 100 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620098243.8U CN205488517U (en) | 2016-02-01 | 2016-02-01 | Radar antenna is warp to butterfly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620098243.8U CN205488517U (en) | 2016-02-01 | 2016-02-01 | Radar antenna is warp to butterfly |
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| Publication Number | Publication Date |
|---|---|
| CN205488517U true CN205488517U (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620098243.8U Expired - Fee Related CN205488517U (en) | 2016-02-01 | 2016-02-01 | Radar antenna is warp to butterfly |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552533A (en) * | 2016-02-01 | 2016-05-04 | 河南师范大学 | Butterfly deformation radar antenna |
| CN108963397A (en) * | 2018-07-26 | 2018-12-07 | 中国计量大学 | Fan shape bandpass filter |
| CN109244636A (en) * | 2018-08-30 | 2019-01-18 | 华中科技大学 | A kind of ground exploring radar antenna with distributed resistance load |
| CN112816923A (en) * | 2020-12-29 | 2021-05-18 | 深圳市联影高端医疗装备创新研究院 | Ultrahigh field emission shimming coil structure |
| CN115693129A (en) * | 2022-11-11 | 2023-02-03 | 东莞市合康电子有限公司 | Interdigital antenna structure and antenna assembly |
-
2016
- 2016-02-01 CN CN201620098243.8U patent/CN205488517U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552533A (en) * | 2016-02-01 | 2016-05-04 | 河南师范大学 | Butterfly deformation radar antenna |
| CN108963397A (en) * | 2018-07-26 | 2018-12-07 | 中国计量大学 | Fan shape bandpass filter |
| CN109244636A (en) * | 2018-08-30 | 2019-01-18 | 华中科技大学 | A kind of ground exploring radar antenna with distributed resistance load |
| CN112816923A (en) * | 2020-12-29 | 2021-05-18 | 深圳市联影高端医疗装备创新研究院 | Ultrahigh field emission shimming coil structure |
| CN115693129A (en) * | 2022-11-11 | 2023-02-03 | 东莞市合康电子有限公司 | Interdigital antenna structure and antenna assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20190201 |