CN106329076A - Wide-band semicircular slot loading semi-elliptical antenna - Google Patents
Wide-band semicircular slot loading semi-elliptical antenna Download PDFInfo
- Publication number
- CN106329076A CN106329076A CN201610852284.6A CN201610852284A CN106329076A CN 106329076 A CN106329076 A CN 106329076A CN 201610852284 A CN201610852284 A CN 201610852284A CN 106329076 A CN106329076 A CN 106329076A
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- China
- Prior art keywords
- half slot
- metal
- antenna
- radiation
- semiellipse
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/526—Electromagnetic shields
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Waveguide Aerials (AREA)
- Details Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a wide-band semicircular slot loading semi-elliptical antenna. A metal shielding cavity is a rectangular reflecting cavity with an opening formed at the front end; an insulating dielectric plate is fixed at the opening of the front end of the metal shielding cavity; semicircular slot loading metal radiating arms are symmetrically printed on the front surface of the insulating dielectric plate through a circuit board printing technology, so that an ultra-wide-band planar dipole antenna can be formed; an interval is preset between the two semicircular slot loading metal radiating arms; the two semicircular slot loading metal radiating arms are respectively provided with two input ports which are adjacent to the gap, wherein the input ports are adopted as the respective feeding ports of the semicircular slot loading metal radiating arms; loading resistors are symmetrically welded between the bottom edges at the two sides of semicircular slots in the semicircular slot loading metal radiating arms and the side plates of the metal shielding cavity; the input end of an impedance transformer is connected with the transmitter and receiver of a radar system through a coaxial connector; and the output terminals of the impedance converter is connected with the feeding ends of the two semicircular slot loading metal radiating arms. The wide-band semicircular slot loading semi-elliptical antenna of the invention has the advantages of excellent time-domain radiation characteristic, low input impedance, ultra-wideband performance and compact structure.
Description
Technical field
The invention belongs to all channel antenna design field, be specifically related to a kind of broadband half slot and load semiellipse sky
Line.
Background technology
Ultra broadband detection radar, as a kind of contactless realtime imaging radar system, can penetrate reinforced concrete cob brick
The barriers such as the accumulated snow that wall, pitch layer, mud-rock flow and snowslide cause carry out detecting and perspective imaging, along with the most various heavy
Happening occasionally of the Nature disaster and human accident, ultra broadband detection radar increasingly gets more and more people's extensive concerning and applies.
Antenna is an important ingredient in ultra broadband acquisition radar system, and its performance quality directly affects the spy of radar system
Survey resolution, positioning precision and target recognition ability etc..In practical engineering application, ultra broadband acquisition radar system working environment
Extremely complex, easily affected with decay by medium scattering interference, therefore the performance of antenna is wanted by ultra broadband acquisition radar system
Ask higher.In order to suppress pulses of radiation to trail and reduce straight coupling ripple, shallow-layer target is covered, need to develop time-domain radiation
The good antenna of characteristic is to meet system requirements.
In ultra broadband acquisition radar system, it is desirable to antenna close proximity to ground or body of wall, in order to well with medium coupling
Closing, the antenna with plane dipole form is the first-selection of ultra broadband acquisition radar system, especially with butterfly antenna and deformation knot thereof
Structure is main.Although butterfly antenna has, Time Domain Radiation Characteristics is good, make simple and low cost and other advantages, but its oscillator cross section is big,
Input impedance is high and is unfavorable for the system integration and impedance matching.Therefore, design one had both had butterfly antenna advantage, had again more
Low impedance operator and more preferable broadband character antenna, have ten for the development and application promoting ULTRA-WIDEBAND RADAR Detection Techniques
Divide positive effect.
Summary of the invention
Present invention solves the technical problem that there is provided that a kind of Time Domain Radiation Characteristics is good, input impedance is low, ultra broadband and
The broadband half slot of compact conformation loads semiellipse antenna.
The present invention solves that above-mentioned technical problem adopts the following technical scheme that, a kind of broadband half slot loads semiellipse sky
Line, it is characterised in that include insulation medium board, two half slot metal-loaded radiation arms, metallic enclosure, four loading resistors,
Absorbing material and impedance transformer, wherein metallic enclosure is the rectangle reflection cavity of front opening, is used for shielding backward radiation
With suppression external interference, insulation medium board is fixed at the front opening of metallic enclosure, two half slot metal-loaded radiation
Arm is and is provided with in side, semiellipse metal radiation arm base with midpoint, semiellipse metal radiation arm base as the center of circle, with less than half
The metal radiation arm of the half slot of the oval metal radiation a length of radius of arm semi-minor axis, two half slot metal-loaded radiation arms lead to
Oversampling circuit plate printing technology symmetry is printed on the front of insulation medium board and constitutes super wide band plane dipole antenna, two half slots
The oval end of metal-loaded radiation arm is preset with interval relatively and each other, two half slot metal-loaded spokes of adjacent partition
Penetrate and be respectively equipped with input port on arm as respective feed end, half slot both sides in two half slot metal-loaded radiation arms
Base is parallel with the side of relative insulation medium board respectively, and four loading resistors are symmetrically welded and radiate in half slot metal-loaded
In arm between base and the side plate of metallic enclosure of half slot both sides, impedance transformer is arranged at dielectric back two
The position that half slot metal-loaded radiation arm ellipse end is relative, this impedance transformer is used for realizing 1:2 impedance transformation and imbalance
To balance conversion, its input uses 50 Ω micro-strip designs, and outfan is 100 Ω parallel wires, the input of impedance transformer
Being connected with transmitter or the receiver of radar system by coaxial connector, the outfan of impedance transformer is respectively with two and half
The feed end of circular groove metal-loaded radiation arm is connected, and absorbing material is filled in inside whole metallic enclosure.
Further preferably, the value of described half slot metal-loaded radiation arm length l follows following relation:
Wherein λlFor the free space wavelength that low-frequency cut-off frequency is corresponding, εeffInsulation medium board by being used is effectively normal relative to dielectric
Number, two half slot metal-loaded radiation arms determine a length of 189mm of its major semiaxis after simulation optimization, and semi-minor axis is a length of
90mm, half slot radius is 85mm.
Further preferably, the spacing distance preset between said two half slot metal-loaded radiation arm is 2mm.
Further preferably, the size of described impedance transformer is 16mm × 18mm × 1.6mm.
Further preferably, the material of described metallic enclosure is aluminium alloy, and its back of the body chamber height is 51mm, the size of opening surface
Be printed with the insulation medium board consistent size of two half slot metal-loaded radiation arms, be 400mm × 200mm.
The broadband half slot of the present invention loads semiellipse antenna elementary cell and is made up of a symmetrical semiellipse dipole, adopts
Load half slot with a pair radiation arm end to be processed, to avoid the vibration of pulse signal to trail so that antenna has good
Good broadband character and impedance operator, and antenna volume is less, it is easy to the miniaturization of radar and integrated, antenna is installed on
The opening part of metallic enclosure, and it is filled with absorbing material, reach the purpose shielding backward radiation with suppression external interference, can
To meet the engineering demand of ultra broadband detection radar.
Accompanying drawing explanation
Fig. 1 is the perspective view of the present invention；
Fig. 2 is the voltage standing wave ratio curve chart of the present invention；
Fig. 3 is the outfield actual measurement echo curve figure of the present invention.
In figure: 1, insulation medium board, 2, half slot metal-loaded radiation arm, 3, metallic enclosure, 4, loading resistor, 5, resistance
Resistance parallel operation.
Detailed description of the invention
The particular content of the present invention is described in detail in conjunction with accompanying drawing.Fig. 1 is that a kind of broadband half slot loading semiellipse antenna stands
Body structural representation, as it is shown in figure 1, this broadband half slot loads semiellipse antenna includes that 1, two half slots of insulation medium board add
Carry metal radiation arm 2,3, four loading resistors 4 of metallic enclosure, absorbing material and impedance transformer 5, wherein metallic enclosure 3
For the rectangle reflection cavity of front opening, being used for shielding backward radiation and suppression external interference, insulation medium board 1 is fixed on metal
At the front opening of shielding cavity 3, two half slot metal-loaded radiation arms 2 are and set in side, semiellipse metal radiation arm base
Have with midpoint, semiellipse metal radiation arm base as the center of circle, with less than the half of the semiellipse metal radiation a length of radius of arm semi-minor axis
The metal radiation arm of circular groove, two half slot metal-loaded radiation arms 2 are printed on insulation by printing circuit board technology symmetry and are situated between
The front of scutum 1 constitutes super wide band plane dipole antenna, and the oval end of two half slot metal-loaded radiation arms 2 is relatively and phase
It is preset with interval between Hu, two half slot metal-loaded radiation arms 2 of adjacent partition are respectively equipped with input port as respectively
From feed end, in two half slot metal-loaded radiation arms 2 base of half slot both sides respectively with relative insulation medium board 1
Side parallel, four loading resistors 4 are symmetrically welded the base of half slot both sides and gold in half slot metal-loaded radiation arm 2
Belonging between the side plate of shielding cavity 3, impedance transformer 5 is arranged at two, insulation medium board 1 back side half slot metal-loaded radiation arm 2
The position that oval end is relative, this impedance transformer 5 is used for realizing 1:2 impedance transformation and uneven to balance conversion, its input
Using 50 Ω micro-strip designs, outfan is 100 Ω parallel wires, and the input of impedance transformer 5 passes through coaxial connector and thunder
The transmitter or the receiver that reach system are connected, and the outfan of impedance transformer 5 radiates with two half slot metal-loaded respectively
The feed end of arm 2 is connected, and it is internal that absorbing material is filled in whole metallic enclosure 3.
The value of described half slot metal-loaded radiation arm 2 length l follows following relation:Wherein λlFor low
Frequently the free space wavelength that cut-off frequency is corresponding, εeffBy insulation medium board 1 Effective relative permittivity used, two and half
Circular groove metal-loaded radiation arm 2 determines a length of 189mm of its major semiaxis, a length of 90mm of semi-minor axis after simulation optimization, half
Circular groove radius is 85mm.
The spacing distance preset between said two half slot metal-loaded radiation arm 2 is 2mm, can be according to input impedance etc.
Interval between two half slot metal-loaded radiation arms 2 is adjusted by antenna technology index request.
The size of described impedance transformer 5 is 16mm × 18mm × 1.6mm.
The material of described metallic enclosure 3 is aluminium alloy, comprehensive bandwidth and minimum bass reflex feature, and its back of the body chamber height is
51mm, the size of opening surface and insulation medium board 1 consistent size being printed with two half slot metal-loaded radiation arms 2, be
400mm×200mm。
Described four loading resistors 4 follow the CURRENT DISTRIBUTION feature on half slot metal-loaded radiation arm 2, be symmetrically welded in
Between half slot metal-loaded radiation arm 2 base and metallic enclosure 3 side plate.Concrete mode is: two loading resistors 4 therein
One end of pin is welded with the base of the half slot metal-loaded radiation arm 2 of side, the other end of these two loading resistor 4 pins
Weld mutually with the side plate of metallic enclosure 3；One end of two loading resistor 4 pins additionally loads gold with the half slot of opposite side
Belonging to the base welding of radiation arm 2, the other end of these two loading resistor 4 pins welds mutually with the side of metallic enclosure 3.
As in figure 2 it is shown, load the voltage standing wave ratio curve chart of semiellipse antenna for broadband half slot.In figure, abscissa table
Showing frequency variable, unit is MHz；Vertical coordinate represents amplitude variations.In 10-900MHz frequency band range, voltage standing wave ratio is the least
In 2, it is known that antenna has preferable port match characteristic, it is possible to meet the resolution requirement of ultra broadband detection radar well.
As it is shown on figure 3, load the outfield actual measurement echo curve figure of semiellipse antenna for broadband half slot.In figure, abscissa
Express time variable, unit is ns, and vertical coordinate represents normalization echo signal amplitude variable, and in figure, wire part is outfield in fact
Test the target object detected.Obvious target echo reflected signal as we can see from the figure, the radiation waveform of antenna is more dry
Only, and it is smaller to follow the vibration below of primary radiation ripple closely, and oscillation level is less than 10%, shows that antenna has good time-domain radiation
Characteristic.
In sum, a kind of broadband half slot that the present invention provides load semiellipse antenna have relatively low input impedance,
Good broadband character and Time Domain Radiation Characteristics, and antenna volume is less, it is easy to the miniaturization of radar and integrated, it is possible to
Meet the engineering demand of ultra broadband detection radar, there is good application prospect and promotional value.
The ultimate principle of the present invention, principal character and advantage have more than been shown and described, without departing from the present invention spirit and
On the premise of scope, the present invention also has various changes and modifications, and these changes and improvements are desirable that the protection model falling into the present invention
Within enclosing.
Claims (5)
1. a broadband half slot loads semiellipse antenna, it is characterised in that include that insulation medium board, two half slots load gold
Belonging to radiation arm, metallic enclosure, four loading resistors, absorbing material and impedance transformer, wherein metallic enclosure is that front end is opened
The rectangle reflection cavity of mouth, is used for shielding backward radiation and suppression external interference, and insulation medium board is fixed on metallic enclosure
At front opening, two half slot metal-loaded radiation arms are and are provided with semiellipse in side, semiellipse metal radiation arm base
Midpoint, metal radiation arm base is the center of circle, metal with the half slot less than the semiellipse metal radiation a length of radius of arm semi-minor axis
Radiation arm, two half slot metal-loaded radiation arms are printed on the front structure of insulation medium board by printing circuit board technology symmetry
Become super wide band plane dipole antenna, between the oval end of two half slot metal-loaded radiation arms is preset with relatively and each other
Every, two half slot metal-loaded radiation arms of adjacent partition are respectively equipped with input port as respective feed end, two
In half slot metal-loaded radiation arm, the base of half slot both sides is parallel with the side of relative insulation medium board respectively, and four add
Carry resistance and be symmetrically welded in half slot metal-loaded radiation arm between base and the side plate of metallic enclosure of half slot both sides,
Impedance transformer is arranged at the position that two half slot metal-loaded radiation arm ellipse ends of dielectric back are relative, this impedance
Changer is used for realizing 1:2 impedance transformation and uneven to balance conversion, and its input uses 50 Ω micro-strip designs, and outfan is
100 Ω parallel wires, the input of impedance transformer is connected with transmitter or the receiver of radar system by coaxial connector
Connecing, the outfan of impedance transformer feed end with two half slot metal-loaded radiation arms respectively is connected, and absorbing material is filled out
Fill inside whole metallic enclosure.
Broadband the most according to claim 1 half slot loads semiellipse antenna, it is characterised in that: described half slot loads gold
The value belonging to radiation arm length l follows following relation:Wherein λlFor the free space that low-frequency cut-off frequency is corresponding
Wavelength, εeffBy the insulation medium board Effective relative permittivity used, two half slot metal-loaded radiation arms are through emulation
Determining a length of 189mm of its major semiaxis, a length of 90mm of semi-minor axis after optimization, half slot radius is 85mm.
Broadband the most according to claim 1 half slot loads semiellipse antenna, it is characterised in that: said two half slot adds
Carrying the spacing distance preset between metal radiation arm is 2mm.
Broadband the most according to claim 1 half slot loads semiellipse antenna, it is characterised in that: described impedance transformer
A size of 16mm × 18mm × 1.6mm.
Broadband the most according to claim 1 half slot loads semiellipse antenna, it is characterised in that: described metallic enclosure
Material is aluminium alloy, and its back of the body chamber height is 51mm, the size of opening surface be printed with two half slot metal-loaded radiation arms
Insulation medium board consistent size, is 400mm × 200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610852284.6A CN106329076A (en) | 2016-09-26 | 2016-09-26 | Wide-band semicircular slot loading semi-elliptical antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610852284.6A CN106329076A (en) | 2016-09-26 | 2016-09-26 | Wide-band semicircular slot loading semi-elliptical antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106329076A true CN106329076A (en) | 2017-01-11 |
Family
ID=57820145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610852284.6A Pending CN106329076A (en) | 2016-09-26 | 2016-09-26 | Wide-band semicircular slot loading semi-elliptical antenna |
Country Status (1)
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| CN (1) | CN106329076A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389398A (en) * | 2019-07-25 | 2019-10-29 | 江西师范大学 | A kind of ultra wide band perfection absorber and preparation method thereof |
| CN112670697A (en) * | 2020-12-31 | 2021-04-16 | 吉林大学 | Ground penetrating radar ultra wide band folded antenna |
| CN113794044A (en) * | 2021-08-31 | 2021-12-14 | 深圳市信维通信股份有限公司 | Compact omnidirectional small base station antenna |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738580A (en) * | 2012-07-03 | 2012-10-17 | 浙江大学 | Ultra-wideband monopole antenna with expanded horizontal plane open circuit section and semi-oval slot |
| CN105811101A (en) * | 2016-05-16 | 2016-07-27 | 河南师范大学 | Ultra-wideband drop-shaped antenna for through-wall radar |
| CN105826673A (en) * | 2016-05-16 | 2016-08-03 | 河南师范大学 | Ultra-wideband teardrop-shaped dipole antenna |
-
2016
- 2016-09-26 CN CN201610852284.6A patent/CN106329076A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738580A (en) * | 2012-07-03 | 2012-10-17 | 浙江大学 | Ultra-wideband monopole antenna with expanded horizontal plane open circuit section and semi-oval slot |
| CN105811101A (en) * | 2016-05-16 | 2016-07-27 | 河南师范大学 | Ultra-wideband drop-shaped antenna for through-wall radar |
| CN105826673A (en) * | 2016-05-16 | 2016-08-03 | 河南师范大学 | Ultra-wideband teardrop-shaped dipole antenna |
Non-Patent Citations (1)
| Title |
|---|
| 王友成: "末端开槽超宽带天线的研究", 《电波科学学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389398A (en) * | 2019-07-25 | 2019-10-29 | 江西师范大学 | A kind of ultra wide band perfection absorber and preparation method thereof |
| CN112670697A (en) * | 2020-12-31 | 2021-04-16 | 吉林大学 | Ground penetrating radar ultra wide band folded antenna |
| CN113794044A (en) * | 2021-08-31 | 2021-12-14 | 深圳市信维通信股份有限公司 | Compact omnidirectional small base station antenna |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170111 |
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| RJ01 | Rejection of invention patent application after publication |