CN109193146A - A kind of micro-strip millimeter wave antenna - Google Patents
A kind of micro-strip millimeter wave antenna Download PDFInfo
- Publication number
- CN109193146A CN109193146A CN201811064637.1A CN201811064637A CN109193146A CN 109193146 A CN109193146 A CN 109193146A CN 201811064637 A CN201811064637 A CN 201811064637A CN 109193146 A CN109193146 A CN 109193146A
- Authority
- CN
- China
- Prior art keywords
- millimeter wave
- feed line
- microstrip feed
- metal patch
- micro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
Abstract
The invention discloses a kind of micro-strip millimeter wave antenna, a kind of single antenna of the work of the micro-strip millimeter wave antenna in 74.68GHZ~77.48GHZ millimeter wave frequency band.The series fed antenna being made of four array element units.It mainly include metal patch, microstrip feed line, dielectric substrate, lower metal ground plate, interface by the way of central side feedback.The size material of metal patch is identical, and the size material of microstrip feed line is also identical.Metal patch uses copper product, and lower metal ground plate uses copper product, and current volume is smaller and smaller, precision is higher and higher it is an object of the invention to adapting to, and more easily the needs of various equipment, the millimeter wave antenna that the present invention designs are very significant.
Description
Technical field
The present invention relates to antenna technical fields, are related to a kind of millimeter wave antenna more particularly to a kind of work in 74.68GHZ
The single antenna of~77.48GHZ millimeter wave frequency band.
Background technique
Millimeter wave has the advantages that a lot compared to the electromagnetic wave of its all band.(1) atmosphere propagates millimeter-wave signal
Decaying with respect to other frequency ranges decay it is smaller；(2) effective frequency range of millimere-wave band is wide；(3) millimeter wave antenna is small in size, wave beam
It is narrow, angular resolution is higher.Currently, microwave (0.3G~30GHz) wave band has almost been occupied by various wireless applications, such as
WIFI, bluetooth, wireless communication, AM, FW radio broadcasting etc..And millimeter wave is not used day largely because the size of antenna and
The wavelength of electromagnetic wave is closely coupled, and for the manufacture craft of antenna, the dimensional tolerances of all parts will beIn range,
This is easily achieved the antenna production of low-frequency range, but the wavelength of millimeter wave is that grade is other, which results in
The production of millimeter wave antenna becomes extremely difficult.
Shown in sum up, up to the present, the millimeter wave antenna of superior performance is fewer and fewer, more next in order to adapt to current volume
It is smaller, precision is higher and higher, more convenient and fast needs of various equipment, the design and implementation of millimeter wave antenna just becomes to have very much
Meaning.
Summary of the invention
For Antenna Operation in the present invention in 74.68GHZ~77.48GHZ frequency range, so high frequency proposes medium substrate
Very high requirement.It is also simultaneously a very big challenge to the Antenna Design for meeting certain bandwidth of operation.
To solve the above-mentioned problems, the present invention mainly devises a kind of micro-strip millimeter wave antenna, the micro-strip millimeter wave day
Line is a kind of works in the single antenna of 74.68GHZ~77.48GHZ millimeter wave frequency band.The single antenna is by four identical array element lists
The series fed antenna of member composition, the structure type presented using central side；Each array element unit includes that a metal patch and one are micro-
The side of metal patch is arranged in ribbon feeder, microstrip feed line, and four array element units are sequentially connected with, and metal patch is square；Four
A array element unit is arranged on dielectric substrate 3, and dielectric substrate 3 is arranged on lower metal ground plate 4, and interface 5 is arranged in four battle arrays
The side of first unit.The size of each section, as shown in Figure 1, 2.Four metal patches are respectively the first metal patch 1a, second
Metal patch 1b, third metal patch 1c, the 4th metal patch 1d, the size material of four metal patches is identical, and thickness is all
H1, width are all W1, and length is all L1；Four microstrip feed lines are respectively the first microstrip feed line 2a, the second microstrip feed line 2b, third
Microstrip feed line 2c, the 4th microstrip feed line 2d, the size material of four microstrip feed lines is identical, and thickness is all h1, and width is all W2, long
Degree is all L2；Lower metal ground plate 4 with a thickness of h3；Be between metal patch and lower metal ground plate 4 dielectric constant be εr's
Dielectric substrate 3, with a thickness of h2.For metal patch, in addition to the side being connected with microstrip feed line, other three sides to dielectric substrate 3
The distance at edge be all S.
The material that the metal patch uses is copper sheet Cu, length L1=1.34mm, width W1=1.92mm, thickness h 1
=0.018mm, other than the side being connected with microstrip feed line, the distance on other three metal patch sides to the edge of dielectric substrate 3
It is all S, S 38.5mm.
Width W2=0.75mm, the L2=1.216mm of the microstrip feed line 2, with a thickness of h1=0.018mm.
The medium substrate 3 selects Rogers_RO3003, according to the change curve of its dielectric constant, calculates
The permittivity ε of 74GHZ~80GHZ frequency rangerIt is 2.8704, loss tangent tan δ is 0.0013.In selection medium substrate 3
Thickness h 2 when, due to it size can working band to entire antenna and radiation efficiency have a huge impact, examining
Consider the working frequency range of antenna and the factor of material physical property, cost and manufacturer's standard etc., the medium of final choice
The thickness h 2 of substrate is 0.254mm.
4 plate of lower metallic ground uses copper product, and thickness h 3 is 0.018mm.
The interface 5 is SMA interface, and the outer conductor internal diameter of SMA interface is 4.13mm, 50 Ω of characteristic impedance, work frequency
Rate is to 80GHZ.
The characteristic impedance of microstrip feed line 2 is that 50 Ω are obtained using standing-wave ratio less than 1.5 as shown in figure 3, being emulated by ADS
The standing-wave ratio bandwidth of the antenna, the standing-wave ratio in 74.68GHZ~77.48GHZ frequency range are respectively less than 1.5 (containing 1.5), institute
Bandwidth with antenna is 2.8GHZ, in the input impedance in this frequency band in the Ω of 29 Ω~60.
Detailed description of the invention
Fig. 1 is overall antenna structure figure of the present invention.
Fig. 2 is the structure chart of one unit of inventive antenna.
Fig. 3 is the characteristic impedance of inventive antenna with the variation diagram of frequency.
Fig. 4 is the antenna standing wave ratio figure that present invention emulation obtains.
Fig. 5 is change curve of the present invention obtained S11 amplitude of emulation with frequency.
Fig. 6 is change curve of the present invention obtained S11 phase of emulation with frequency.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing, the present invention be one kind can work 74.68GHZ~
77.48GHZ frequency range millimeter wave antenna, for the ease of a group battle array, chip unit is by the way of central side feedback.Including metal patch
(1a, 1b, 1c, 1d), microstrip feed line (2a, 2b, 2c, 2d), medium substrate 3, lower metal ground plate 4, interface 5.Microstrip feed line
Characteristic impedance is generally between 40~150 Ω, and there are commonly 50 Ω, 75 Ω.Using the characteristic impedance of 50 Ω in the present invention.
As shown in Figure 3.
It first has to select suitable medium, dielectric constant of the dielectric material ε when microstrip antenna designsrAnd loss tangent
Tan δ and its thickness directly affect a series of performance indicators of antenna.Since the Antenna Operation in the present invention is in 74.68GHZ
~77.48GHZ frequency range, so high frequency propose higher requirement to medium substrate.Currently, mask-making technology both domestic and external is horizontal
Differ larger, especially in high band, the domestic micro-strip substrate performance such as FR4 epoxy resin and polytetrafluoroethylene (PTFE) is poor, cannot
Using in the Antenna Design.The Rogers_RO3003 dielectric-slab of ROGERS CORPORATION's production has good high frequency response characteristic,
It is still able to maintain good characteristic in 80GHz, the substrate for using the dielectric-slab as this antenna is beneficial to improve the spoke of antenna
Penetrate efficiency and gain.Medium substrate present invention employs Rogers_RO3003 as antenna.From its dielectric constant with frequency
Change curve be calculated in 74.68GHZ~77.48GHZ frequency range, its permittivity εr=2.8704, loss angle is just
Cut δ=0.0013 value tan.
As shown in Figure 1, 2, medium substrate 3 with a thickness of h2, h2 meets following relationship:
fμIt is maximum operating frequency.In conjunction with the production requirement of producer, select h2 with a thickness of 0.254mm.
Metal patch uses copper product.As shown in Fig. 2, being L1 for length, width is the gold of the rectangular microstrip antenna of W1
Belong to the size of patch 1, L1 ≠ W1；
In formula, c=3 × 108M/s, f are the working frequency of antenna.
If λeFor the waveguide wavelength in medium, have:
Wherein, εeFor effective dielectric constant, indicate are as follows:
The length L1 of metal patch 1 is taken as λe/ 2, it is contemplated that after edge shortens effect, the length of actual metal patch 1
L1 are as follows:
Wherein, Δ L is the length in equivalent radiated power gap, calculation formula are as follows:
W1=1.3824mm, L1=0.9795mm are calculated by the parameter and above formula of Rogers_RO3003.
By ADS software emulation, the theoretical value being calculated is modified to optimal value W1=1.92mm, L1=1.34mm.Metal patch
Copper thickness h1 be 0.018mm, 0.035mm, 0.055mm, 0.07mm, 0.105mm.It is selected in the working characteristics present invention in conjunction with antenna
Select the thickness h 1=0.018mm of metal patch.The distance S of edge effect in order to prevent, side to the medium edge of metal patch takes
The λ of 10 λ~20 (λ is wavelength), the present invention in S be 38.5mm.
Utilize microstrip line calculating instrument in Advanced Design System (ADS) software of Agilent company
LineCalc calculates microstrip feed line width, inputs microstrip transmission line parameter, obtains microstrip feed line width W2=0.706314mm, long L2
=1.216020mm.By ADS software emulation, the theoretical value being calculated is modified to optimal value W2=0.75mm, long L2=
1.216mm.Microstrip feed line thickness is equal to the thickness of metal patch 1.
Lower metal ground plate uses copper product, and thickness h 3 is 0.018mm.
In order to adapt to antenna high frequency working frequency range, interface 5 be SMA interface, outer conductor internal diameter be 4.13mm, characteristic resistance
Anti- 50 Ω, working frequency can arrive 80GHZ.
Fig. 4 is to emulate obtained standing-wave ratio with the change curve of frequency, and staying for the antenna is obtained less than 1.5 using standing-wave ratio
Bobbi bandwidth, as shown in figure 4, the standing-wave ratio in 74.68GHZ~77.48GHZ frequency range is respectively less than 1.5 (containing 1.5), institute
Bandwidth with antenna is 2.8GHZ.Using the map of magnitudes and phase diagram of S11, as shown in Figure 5,6, it is calculated in this frequency band
Input impedance is in the Ω of 29 Ω~60.
Claims (7)
1. a kind of micro-strip millimeter wave antenna, it is characterised in that: the micro-strip millimeter wave antenna be it is a kind of work 74.68GHZ~
77.48GHZ the single antenna of millimeter wave frequency band；The series fed antenna that the single antenna is made of four identical array element units, in
The structure type of heart side feedback；Each array element unit includes a metal patch and a microstrip feed line, and microstrip feed line is arranged in gold
Belong to the side of patch, four array element units are sequentially connected with；Metal patch is square, and four array element units are arranged in dielectric substrate
(3) on, dielectric substrate (3) is arranged on lower metal ground plate (4), and the side of four array element units is arranged in interface (5)；Four
Metal patch is respectively the first metal patch (1a), the second metal patch (1b), third metal patch (1c), the 4th metal patch
The size material of (1d), four metal patches are identical, and it is all W1 that thickness, which is all h1, width, and length is all L1；Four microstrip feed lines
Respectively the first microstrip feed line (2a), the second microstrip feed line (2b), third microstrip feed line (2c), the 4th microstrip feed line (2d), four
The size material of a microstrip feed line is identical, and thickness is all h1, and width is all W2, and length is all L2；The thickness of lower metal ground plate (4)
Degree is h3；Be between metal patch and lower metal ground plate (4) dielectric constant be εrDielectric substrate (3), with a thickness of h2；For
Metal patch, in addition to the distance on the side being connected with microstrip feed line, other three sides to the edges of dielectric substrate (3) is all S.
2. a kind of micro-strip millimeter wave antenna according to claim 1, it is characterised in that: the material that the metal patch uses
Material is copper sheet Cu, length L1=1.34mm, width W1=1.92mm, thickness h 1=0.018mm, in addition to what is be connected with microstrip feed line
Outside side, the distance at other three metal patch sides to the edges of dielectric substrate (3) is all S, S 38.5mm.
3. a kind of micro-strip millimeter wave antenna according to claim 1, it is characterised in that: the width of the microstrip feed line (2)
W2=0.75mm, L2=1.216mm are spent, with a thickness of h1=0.018mm.
4. a kind of micro-strip millimeter wave antenna according to claim 1, it is characterised in that: medium substrate (3) selection
Rogers_RO3003 calculates the permittivity ε in 74GHZ~80GHZ frequency range according to the change curve of its dielectric constantrFor
2.8704, loss tangent tan δ are 0.0013；The thickness h 2 of the medium substrate selected is 0.254mm.
5. a kind of micro-strip millimeter wave antenna according to claim 1, it is characterised in that: described lower metallic ground (4) plate
Using copper product, thickness h 3 is 0.018mm.
6. a kind of micro-strip millimeter wave antenna according to claim 1, it is characterised in that: the interface (5) connects for SMA
Mouthful, the outer conductor internal diameter of SMA interface is 4.13mm, 50 Ω of characteristic impedance, working frequency to 80GHZ.
7. a kind of micro-strip millimeter wave antenna according to claim 1, it is characterised in that: the characteristic impedance of microstrip feed line (2)
For 50 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811064637.1A CN109193146A (en) | 2018-09-12 | 2018-09-12 | A kind of micro-strip millimeter wave antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811064637.1A CN109193146A (en) | 2018-09-12 | 2018-09-12 | A kind of micro-strip millimeter wave antenna |
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| CN109193146A true CN109193146A (en) | 2019-01-11 |
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| CN201811064637.1A Pending CN109193146A (en) | 2018-09-12 | 2018-09-12 | A kind of micro-strip millimeter wave antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274629A (en) * | 2019-07-03 | 2019-09-24 | 电子科技大学 | A kind of multi-functional integrated type wireless sensing device assembly and detection method |
| CN111029765A (en) * | 2019-12-24 | 2020-04-17 | 北京工业大学 | Millimeter wave frequency scanning antenna |
| CN111753434A (en) * | 2020-07-03 | 2020-10-09 | 湖南华诺星空电子技术有限公司 | Ultra-narrow-band navigation interference antenna design method, antenna and application thereof |
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| US4180817A (en) * | 1976-05-04 | 1979-12-25 | Ball Corporation | Serially connected microstrip antenna array |
| JPH04120804A (en) * | 1990-09-11 | 1992-04-21 | Omron Corp | Plane antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274629A (en) * | 2019-07-03 | 2019-09-24 | 电子科技大学 | A kind of multi-functional integrated type wireless sensing device assembly and detection method |
| CN111029765A (en) * | 2019-12-24 | 2020-04-17 | 北京工业大学 | Millimeter wave frequency scanning antenna |
| CN111753434A (en) * | 2020-07-03 | 2020-10-09 | 湖南华诺星空电子技术有限公司 | Ultra-narrow-band navigation interference antenna design method, antenna and application thereof |
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