CN110233325B - Butterfly dipole slot antenna substrate manufacturing method and butterfly dipole slot antenna - Google Patents

Butterfly dipole slot antenna substrate manufacturing method and butterfly dipole slot antenna Download PDF

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Publication number
CN110233325B
CN110233325B CN201910444372.6A CN201910444372A CN110233325B CN 110233325 B CN110233325 B CN 110233325B CN 201910444372 A CN201910444372 A CN 201910444372A CN 110233325 B CN110233325 B CN 110233325B
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slot antenna
butterfly dipole
butterfly
antenna substrate
arc
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CN110233325A (en
Inventor
周利兵
吴天博
陈文涛
李龙飞
许广虎
白云霄
宋辉
杨定乾
刘振国
詹仲强
王洁
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Xinjiang Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Xinjiang Electric Power Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/36Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/364Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/36Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/364Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor
    • H01Q1/368Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor using carbon or carbon composite
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/36Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/50Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/52Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/526Electromagnetic shields
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00Antenna arrays or systems
    • H01Q21/28Combinations of substantially independent non-interacting antenna units or systems
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04Resonant antennas
    • H01Q9/16Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole

Abstract

The invention relates to the technical field of radio frequency and engineering geophysical prospecting, in particular to a manufacturing method of a butterfly dipole slot antenna substrate and a butterfly dipole slot antenna, wherein the manufacturing method comprises the following steps: obtaining a plane butterfly dipole antenna substrate, wherein the plane butterfly dipole antenna comprises a first part and a second part which are distributed in bilateral symmetry; processing a gap on the plane butterfly dipole antenna substrate; and filling an absorption medium in each arc-shaped groove to form a butterfly dipole slot antenna substrate, wherein the absorption medium comprises carbon paste, ferrite magnetic material and nano silver powder. According to the invention, through a gap loading mode, electromagnetic waves are conducted and gradually and smoothly absorbed through the absorption medium in the arc-shaped groove in the process of advancing on the surface of the antenna, so that the traveling wave performance of the antenna is improved, the impedance change of the antenna in a frequency band is slow, the antenna is favorably matched with a transmitter and a receiver, the finally formed ground penetrating radar system has small trailing oscillation, and the data interpretation is favorably realized.

Description

Butterfly dipole slot antenna substrate manufacturing method and butterfly dipole slot antenna
Technical Field
The invention relates to the technical field of radio frequency and engineering geophysical prospecting, in particular to a manufacturing method of a butterfly dipole slot antenna substrate and a butterfly dipole slot antenna.
Background
The ground penetrating radar is increasingly applied to the field of engineering geophysical prospecting as an effective nondestructive detection means, and the application range is wider and wider. With the use and the technical development of ground penetrating radar, ground penetrating radar antennas are also developed towards multiple aspects such as wider frequency band, better medium matching, larger efficiency, smaller size and the like. Although the traditional antenna formed by resistor end loading or step resistor loading can meet the bandwidth used by the antenna through loading, the antenna system has low efficiency, the flatness of impedance in the bandwidth is poor, and the matching performance of the antenna with a transmitter and a receiver is poor.
Disclosure of Invention
The invention provides a manufacturing method of a butterfly dipole slot antenna substrate and a butterfly dipole slot antenna, overcomes the defects of the prior art, and can effectively solve the problems that the traditional resistance end loading or step resistance loading antenna has poor traveling wave performance and is not easy to match with a transmitter and a receiver.
One of the technical schemes of the invention is realized by the following measures: a manufacturing method of a butterfly dipole slot antenna substrate comprises the following steps:
obtaining a planar butterfly dipole antenna substrate, wherein the planar butterfly dipole antenna comprises a first part and a second part which are distributed in bilateral symmetry, and the length of the first part and the length of the second part are both L;
the planar butterfly dipole antenna substrate is subjected to gap processing, namely the feeding point of the planar butterfly dipole antenna substrate is taken as the center of a circle on the first part and respectively taken as the center of a circle
Figure BDA0002073138840000011
L-L is arc-shaped grooves with the radius, wherein the width of each arc-shaped groove is L, and the length of each arc-shaped groove is corresponding to the radius
Figure BDA0002073138840000012
The depth of each arc-shaped groove is d, and the second part has the same structure as the first part;
and filling an absorption medium in each arc-shaped groove to form a butterfly dipole slot antenna substrate, wherein the absorption medium comprises carbon paste, ferrite magnetic material and nano silver powder.
The following is further optimization or/and improvement of the technical scheme of the invention:
the outer edge of the first part can be an arc which takes a feeding point of the first part as a circle center and takes the length L of the first part as a radius, a vertical bisector of the L is made, the vertical bisector divides the first part into a left half body and a right half body, the left half body is deformed, so that the upper edge and the lower edge of the left half body intersect with the vertical bisector and the right half body respectively to form a point, the upper edge and the lower edge of the left half body are parallel to the L respectively, and the second part and the first part are distributed in bilateral symmetry and have the same structure.
The length of the first portion may be the sum of the length of the left half and the length of the right half, i.e., L ═ L1+L2Wherein
Figure BDA0002073138840000021
λmThe center wavelength of the antenna.
The included angle R between the first and second portions may be 60 degrees, and the distance between the first and second feeding points may be 4 mm.
The thickness of the planar butterfly dipole antenna substrate can be larger than 2.5 mm.
The absorbing medium can comprise 73% of carbon paste, 14% of ferrite magnetic powder and 13% of nano silver powder.
And filling an absorption medium in each arc-shaped groove to form the butterfly dipole slot antenna substrate, testing through the vector network analyzer after drying, and forming the final butterfly dipole slot antenna substrate after the test is passed.
The second technical scheme of the invention is realized by the following measures: a butterfly dipole slot antenna comprises a supporting part, a hollow metal shielding shell with an opening at the upper end and a butterfly dipole slot antenna substrate manufactured by the butterfly dipole slot antenna substrate manufacturing method of any one of claims 1 to 7, wherein a metal partition plate is arranged in the middle of the metal shielding shell, the metal partition plate divides the inner cavity of the metal shielding shell into a left cavity and a right cavity, the supporting part is arranged in the middle of the left cavity, the lower end of the supporting part is installed with the bottom of the metal partition plate, a butterfly dipole slot antenna substrate is arranged at the top of the supporting part, the butterfly dipole slot antenna substrate is installed with the upper end of the metal shielding shell, wave absorbing materials are filled in the left cavity corresponding to the outer side of the supporting part, and the structures of the right cavity and the left cavity are the same.
The following is further optimization or/and improvement of the technical scheme of the invention:
the supporting component can be a nylon supporting component which is of a cylindrical hollow structure.
The wave-absorbing material can be a flexible sponge wave-absorbing material.
Compared with the traditional resistance end loading and step-by-step loading antenna, the plane butterfly dipole antenna substrate is provided with the arc-shaped groove, and the absorption medium is filled in the groove to form the butterfly dipole slot antenna substrate.
Drawings
FIG. 1 is a flow chart of example 1 of the present invention.
Fig. 2 is a schematic plan view of a planar butterfly dipole antenna substrate in embodiment 1 of the present invention.
Fig. 3 is a schematic plan view of a butterfly dipole slot antenna substrate in embodiment 1 of the present invention.
Fig. 4 is a schematic top view of a butterfly dipole slot antenna according to embodiment 2 of the present invention.
FIG. 5 is a schematic cross-sectional view of A-A of FIG. 4.
The codes in the figures are respectively: the antenna comprises a planar butterfly dipole antenna substrate 1, a first part 2, a second part 3, a feed point 4, an arc-shaped groove 5, a metal shielding shell 6, a supporting part 7, a metal partition plate 8, a butterfly dipole slot antenna substrate 9, a wave absorbing material 10 and screws 11.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 5 in the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described with reference to the following examples and figures:
example 1: as shown in fig. 1, 2 and 3, the method for manufacturing the butterfly dipole slot antenna substrate includes the following steps:
s1, obtaining a planar butterfly dipole antenna substrate 1, wherein the planar butterfly dipole antenna comprises a first part 2 and a second part 3 which are distributed in a bilateral symmetry mode, and the lengths of the first part 2 and the second part 3 are L;
s2, performing slot processing on the planar butterfly dipole antenna substrate 1, i.e. respectively centering on the feeding point 4 of the first part 2
Figure BDA0002073138840000031
L-L is provided with arc-shaped grooves 5 with the radius, wherein the width of each arc-shaped groove 5 is L, and the length of each arc-shaped groove 5 is corresponding to the radius
Figure BDA0002073138840000032
The depth of each arc-shaped groove 5 is d, and the second part 3 has the same structure as the first part 2;
and S3, filling an absorption medium in each arc-shaped groove 5 to form a butterfly dipole slot antenna substrate 9, wherein the absorption medium comprises carbon paste, ferrite magnetic material and nano silver powder.
The planar butterfly dipole antenna substrate 1 is a conventional technology, the planar butterfly dipole antenna substrate 1 can be processed by an RF-4 polytetrafluoroethylene board, the planar butterfly dipole antenna on the planar butterfly dipole antenna substrate 1 is a copper-clad circuit, the thickness of the planar butterfly dipole antenna substrate 1 is set according to actual requirements, the planar butterfly dipole antenna substrate 1 can be larger than 2.5 mm, as shown in fig. 1, the planar butterfly dipole antenna substrate 1 comprises a first part 2 and a second part 3 which are distributed in bilateral symmetry, an included angle R between the first part 2 and the second part 3 can be 60 degrees, and a distance between a feeding point 4 of the first part 2 and a feeding point 4 of the second part 3 can be 4 mm.
When the planar butterfly dipole antenna substrate 1 is subjected to gap processing, the feeding point 4 of the planar butterfly dipole antenna substrate is taken as the center of a circle on the first part 2, and the feeding point 4 is respectively taken as the center of a circle
Figure BDA0002073138840000033
L-L is an arc-shaped groove 5 with the radius, and the second part 3 and the first part 2 are distributed in bilateral symmetry and have the same structure; the arc-shaped groove 5 at the outermost side is formed by taking L-L as the radius, so that the complete arc-shaped groove 5 at the outermost side can be ensured to be formed; the width l of each arc-shaped groove 5 is set according to actual conditions and can be 3 mm, and the length of each arc-shaped groove 5 is corresponding to the radius
Figure BDA0002073138840000034
The depth d of each arc-shaped slot 5, which is set according to the actual situation, can be 1.5 mm.
According to the invention, the arc-shaped groove 5 is formed in the plane butterfly dipole antenna substrate 1, and the absorption medium is filled to form the butterfly dipole slot antenna substrate 9, compared with the traditional resistance end loading and step-by-step loading antenna, in the invention, electromagnetic waves are conducted and gradually and slowly absorbed through the absorption medium in the arc-shaped groove 5 in the process of advancing on the surface of the antenna in a slot loading mode, the traveling wave performance of the antenna is increased, the impedance change of the antenna in a frequency band is slow, the antenna is favorably matched with a transmitter and a receiver, the finally formed ground penetrating radar system is small in trailing oscillation, the antenna efficiency is high, and the data interpretation is favorably realized.
The following is further optimization or/and improvement of the technical scheme of the invention:
as shown in fig. 1, 2, and 3, the outer edge of the first part 2 is an arc with a feeding point 4 of the first part 2 as a center of a circle and a length L of the first part 2 as a radius, and is used as a vertical bisector of L, the vertical bisector divides the first part 2 into a left half body and a right half body, the left half body is deformed, so that an upper edge and a lower edge of the left half body respectively intersect with the vertical bisector and the right half body to form a point, the upper edge and the lower edge of the left half body are respectively parallel to L, and the second part 3 and the first part 2 are symmetrically distributed left and right and have the same structure.
The outer edges of the first part 2 and the second part 3 are designed in an arc shape, so that sudden current changes can be avoided. The left half of the first part 2 and the right half of the second part 3 are deformed at the same time, so that the size of the antenna can be reduced.
As shown in fig. 1 and 3, the length of the first part 2 is the sum of the length of the left half and the length of the right half, i.e. L ═ L1+L2Wherein
Figure BDA0002073138840000041
λmThe center wavelength of the antenna.
As shown in fig. 1 and 3, the absorption medium comprises 73% of carbon paste, 14% of ferrite magnetic powder and 13% of nano silver powder. The carbon paste can be JELCON conductive CH-8(MOD2) conductive carbon paste prepared from ten Japanese inks.
As shown in fig. 1, each arc-shaped groove 5 is filled with an absorbing medium to form a butterfly dipole slot antenna substrate 9, and after being dried, the butterfly dipole slot antenna substrate 9 is tested by a vector network analyzer and finally formed after the test is passed.
Example 2: as shown in fig. 3, 4, and 5, the butterfly dipole slot antenna includes a supporting member 7, a hollow metal shielding case 6 with an open upper end, and a butterfly dipole slot antenna substrate 9, wherein a metal partition plate 8 is disposed in the middle of the metal shielding case 6, the metal partition plate 8 divides the inner cavity of the metal shielding case 6 into a left cavity and a right cavity, the supporting member 7 is disposed in the middle of the left cavity, the lower end of the supporting member 7 is mounted at the bottom of the metal partition plate 8, the butterfly dipole slot antenna substrate 9 is disposed on the top of the supporting member 7, the butterfly dipole slot antenna substrate 9 is mounted at the upper end of the metal shielding case 6, a wave-absorbing material 10 is filled in the left cavity corresponding to the outer side of the supporting member 7, and the right cavity and the left cavity have the same.
The metal partition plate 8 divides the inner cavity of the metal shielding shell 6 into a left cavity and a right cavity, and butterfly dipole slot antenna substrates 9 are respectively arranged at the tops of the supporting parts 7 of the left cavity and the right cavity, so that one of the butterfly dipole slot antenna substrates is used as a transmitting antenna and the other one of the butterfly dipole slot antenna substrates is used as a receiving antenna.
The supporting component 7 and the metal shielding shell 6 can be flush, and meanwhile, when the wave-absorbing material 10 is filled in the left cavity corresponding to the outer side of the supporting component 7, the wave-absorbing material 10 can be ensured to be flush with the metal shielding shell 6, so that the antenna is ensured not to be greatly deformed after being assembled. The supporting part 7 and the metal shielding shell 6, and the bowtie dipole slot antenna substrate 9 and the metal shielding shell 6 can be fixed by screws 11, so that the stability of the bowtie dipole slot antenna substrate 9 is ensured.
The support member 7 may be a glass reinforced plastic flange.
The following is further optimization or/and improvement of the technical scheme of the invention:
according to the needs, the supporting component 7 is a nylon supporting component which is of a cylindrical hollow structure.
According to the requirement, the wave-absorbing material 10 is a flexible sponge wave-absorbing material.
The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.

Claims (10)

1. A manufacturing method of a butterfly dipole slot antenna substrate is characterized by comprising the following steps:
obtaining a planar butterfly dipole antenna substrate, wherein the planar butterfly dipole antenna comprises a first part and a second part which are distributed in bilateral symmetry, and the length of the first part and the length of the second part are both L;
the planar butterfly dipole antenna substrate is subjected to gap processing, namely on the first partWith its feed point as the center of circle, respectively
Figure FDA0003081991770000011
L-L is arc-shaped grooves with the radius, wherein the width of each arc-shaped groove is L, and the length of each arc-shaped groove is corresponding to the radius
Figure FDA0003081991770000012
The depth of each arc-shaped groove is d, and the second part has the same structure as the first part;
and filling an absorption medium in each arc-shaped groove to form a butterfly dipole slot antenna substrate, wherein the absorption medium comprises carbon paste, ferrite magnetic material and nano silver powder.
2. The method for manufacturing the butterfly dipole slot antenna substrate as claimed in claim 1, wherein the outer edge of the first portion is an arc with the first portion feed point as a center and the length L of the first portion as a radius, and a vertical bisector of L is made, the vertical bisector divides the first portion into a left half body and a right half body, the left half body is deformed so that an upper edge and a lower edge of the left half body respectively intersect with the vertical bisector and the right half body at one point, the upper edge and the lower edge of the left half body are respectively parallel to L, and the second portion and the first portion are symmetrically distributed left and right and have the same structure.
3. The method as claimed in claim 2, wherein the length of the first portion is the sum of the length of the left half and the length of the right half, i.e. L ═ L1+L2Wherein
Figure FDA0003081991770000013
λmThe center wavelength of the antenna.
4. The method for manufacturing the butterfly dipole slot antenna substrate as recited in claim 1, wherein the included angle R of the first portion and the included angle R of the second portion are both 60 degrees, and the distance between the first portion feeding point and the second portion feeding point is 4 mm.
5. The method for manufacturing the butterfly dipole slot antenna substrate as claimed in claim 1, wherein the thickness of the planar butterfly dipole antenna substrate is larger than 2.5 mm.
6. The method for manufacturing a butterfly dipole slot antenna substrate according to claim 1, 2, 3, 4 or 5, wherein the absorption medium comprises carbon paste, ferrite magnetic material and nano silver powder, and the proportion of the carbon paste is 73%, the proportion of the ferrite magnetic powder is 14%, and the proportion of the nano silver powder is 13%.
7. The method for manufacturing the butterfly dipole slot antenna substrate according to the claim 1, the claim 2, the claim 3, the claim 4 or the claim 5, wherein the absorption medium is filled in each arc-shaped groove to form the butterfly dipole slot antenna substrate, the butterfly dipole slot antenna substrate is tested by a vector network analyzer after being dried in the air, and the final butterfly dipole slot antenna substrate is formed after the test is passed.
8. A butterfly dipole slot antenna, characterized by, including the supporting member, the hollow metal shielding shell and the butterfly dipole slot antenna base plate manufactured by the butterfly dipole slot antenna base plate manufacturing approach of any claim 1 to 7, there is a metal baffle in the middle part of the metal shielding shell, the metal baffle divides the metal shielding shell cavity into left cavity and right cavity, there is a supporting member in the middle part of the left cavity, the bottom end of the supporting member is mounted together with the bottom of the metal baffle, there is a butterfly dipole slot antenna base plate on the top of the supporting member, and the butterfly dipole slot antenna base plate is mounted together with the upper end of the metal shielding shell, the left cavity corresponding to the outside of the supporting member is filled with the absorbing material, the right cavity and left cavity are the same in structure.
9. The butterfly dipole slot antenna of claim 8, wherein said support member is a nylon support member, said nylon support member having a cylindrical hollow structure.
10. The butterfly dipole slot antenna of claim 8 or 9, wherein the wave absorbing material is a flexible sponge wave absorbing material.
CN201910444372.6A 2019-05-27 2019-05-27 Butterfly dipole slot antenna substrate manufacturing method and butterfly dipole slot antenna Active CN110233325B (en)

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