CN104701613B - Low radar cross section micro-strip paster antenna based on polarization conversion - Google Patents
Low radar cross section micro-strip paster antenna based on polarization conversion Download PDFInfo
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- CN104701613B CN104701613B CN201510112415.2A CN201510112415A CN104701613B CN 104701613 B CN104701613 B CN 104701613B CN 201510112415 A CN201510112415 A CN 201510112415A CN 104701613 B CN104701613 B CN 104701613B
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Abstract
The invention discloses a kind of low radar cross section micro-strip paster antenna based on polarization conversion, the defect for solving existing micro-strip paster antenna scattering property difference.Including radiating element (1), dielectric-slab (2), metal floor (3), coaxial fitting (4) and polarization conversion surface (5)；The upper and lower surface of dielectric-slab (2) prints radiating element (1) and polarization conversion surface (5) and metal floor (3) respectively, polarization conversion surface (5) is made up of four polarization conversion unit groups (51), and centre has square area (6)；The square notch (512) that each polarization conversion unit group (51) includes the polarization conversion unit (511) in the polarization conversion unit (511) that square notch (512) is left on several symmetry axis, each polarization conversion unit group (51) is pointed to identical.The present invention has the advantages that radiance stabilization, scattering property are good, can be as the communication antenna in low radar cross section equipment.
Description
Technical field
The invention belongs to antenna technical field, it is related to a kind of micro-strip paster antenna of low radar cross section, it is more particularly to a kind of
The micro-strip paster antenna of radar cross section is reduced by application polarization conversion structure, on the premise of antenna radiation performance is ensured, tool
There is good scattering properties.Suitable for the radar system required to radiation characteristic and scattering properties.
Background technology
In various communication systems, antenna is the important component in radar system, and its radar cross section is that aircraft is whole
The main contributions source of body radar cross section.Because antenna is used as communication equipment, it is necessary first to ensure normally receiving for self electromagnetism ripple
And transmitting, therefore the technology of conventional decrement radar cross section is not appropriate for antenna radar area reduction.Effective decrement antenna
Radar cross section, and ensure that the radiation characteristic of antenna in itself is not significantly affected, in being antenna radar section decrement field
Maximum problem.The scattering of antenna generally includes two parts：A part is scattered field when antenna connects matched load, is and antenna
Loading condition unrelated structure scattered field, its scattering mechanism can be explained with the scattering mechanism of common scattering object；Another part
It is then that antenna takes over the radar cross section anticipated under loading condition, because load is mismatched with antenna, electromagnetic wave passes through the reflection of antenna,
The scattered field for carrying out secondary radiation and producing, because it is relevant with the change of antenna load situation, therefore is called antenna mode
Scattered field, as a loaded scatters body, this is the distinctive scattering of antenna.It is identical in face of polarizing, and it is in antenna operating band
Interior electromagnetic wave, will realize low radar cross section characteristic, be an extremely difficult task.At present, domestic and foreign scholars are not looked for
To complete preferably technological means, antenna can be made while realizing good radiation and scattering properties.So, how to ensure day
On the premise of beta radiation characteristic is unaffected, antenna of the design with low radar cross section is significant.
Radar cross section is reduced in antenna system mainly to realize by following three kinds of modes：
(1) time domain radar cross section is controlled.When communication system needs work, antenna is allowed in normal operating conditions, and
When communication system does not work, then try to stash on antenna, so that the low radar cross section characteristic of time sharing system is realized, still,
Communication system just loses low radar cross section characteristic completely when working.
(2) spatial domain radar cross section is controlled.If antenna belongs to oblique fire formula travelling-wave aerial, antenna tilt can be placed, from
And the maximum of structural mode scattering is removed threat radar region, at the same time, by width phase control, it still can be made
Greatest irradiation direction is maintained at required direction, in addition, good impedance matching is carried out to aerial array, to reduce antenna mode
Scattering, finally realizes low radar cross section characteristic.But, in addition to threat radar region, it is impossible to keep low radar cross section characteristic.
(3) frequency domain radar section is controlled.By smearing radar absorbing, the appropriate profile for changing antenna, using passive
Cancellation techniques or active cancellation techniques, can effectively realize good scattering properties, wherein first two be it is maximally efficient and
The most frequently used.
Existing micro-strip paster antenna is both sides difference printed conductor thin slice and metal floor and shape above and below dielectric substrate
Into.Compared with other antennas, with lightweight, thin profile and it is easy to process the features such as.Fig. 1 gives a kind of existing micro-strip
Paster antenna, including radiating element 1, dielectric-slab 2, metal floor 2 and coaxial fitting 4；In the upper and lower surface of dielectric-slab 1 respectively
Radiating element 2 and metal floor 3 are printed with, coaxial fitting inner core is connected through dielectric-slab with radiating element, the outer core of coaxial fitting
Then be connected with metal floor 3, radiating element 2 uses the length of side for 15.6mm square-shaped metal paster, floor use the length of side for
80mm square-shaped metal paster.By rational optimization design, this antenna can realize good radiation characteristic, but because
Size for the metal floor of the micro-strip paster antenna is more than radiating element, there is radar cross section height, the defect of scattering properties difference.
The content of the invention
It is an object of the invention to the defect existed for above-mentioned existing micro-strip paster antenna, it is proposed that one kind is based on polarization
The low radar cross section micro-strip paster antenna of conversion, its scattering property is improved in the radar cross section for reducing micro-strip paster antenna.
To realize above-mentioned purpose, the present invention includes radiating element 1, dielectric-slab 2, metal floor 3 and coaxial fitting 4；Institute
Give an account of and be printed with radiating element 1 and metal floor 3 in the upper and lower surface of scutum 2 respectively, it is characterised in that：In the upper of dielectric-slab 2
Surface is also printed with polarization conversion surface 5, and the polarization conversion surface 5 is made up of four polarization conversion unit groups 51, these poles
Change the surrounding that converting unit group is distributed in radiating element 1, centre forms the square area 6 that the length of side is M, and M span is
19-23mm；Each polarization conversion unit group 51 includes several polarization conversion units 511, and polarization conversion unit 511 is by one
The square symmetrical structure of the circumference that constitutes by the line segment that bends several times, radiating element 1 is pointed in square
The square for the polarization conversion unit 511 being provided with diagonal in square notch 512, and each polarization conversion unit group 51
Breach 512 points to the sensing of the square notch 512 of identical polarization conversion unit 511 in adjacent polarized converting unit group 51
90 ° of difference.
The above-mentioned low radar cross section micro-strip paster antenna based on polarization conversion, it is characterised in that polarization conversion unit group 51 is
By n polarization conversion unit 511, in the cycle such as X-direction and Y-direction, arrangement is constituted, n >=8, in the apex close to radiating element 1
A default polarization conversion unit 511, for forming the square area 6 in the middle of polarization conversion surface 5；Adjacent polarized conversion is single
The sensing of the square notch 512 of polarization conversion unit 511 in tuple 51 differs 90 °.
The above-mentioned low radar cross section micro-strip paster antenna based on polarization conversion, it is characterised in that the shape of the radiating element 1
Shape is square, and the length of side is 15.6mm, and the polarization conversion unit (511) has four resonant frequencies, its lowest resonant frequency
It is identical for the working frequency of the existing micro-strip paster antenna of 15.6mm square-shaped metal paster with the length of side of radiating element 1.
The above-mentioned low radar cross section micro-strip paster antenna based on polarization conversion, it is characterised in that polarization conversion unit 511
Circumference square size dimension S1 is 9mm, and the size dimension S2 of square notch 512 is 3mm, bends the feature sizes of line segment
S3 span is 0.9-1.1mm.
The above-mentioned low radar cross section micro-strip paster antenna based on polarization conversion, it is characterised in that radiating element 1 is shaped as
Square, the length of side is 15.6mm.
The above-mentioned low radar cross section micro-strip paster antenna based on polarization conversion, it is characterised in that the outer core 42 of coaxial fitting 4
It is connected with metal floor 3, inner core 41 is connected through dielectric-slab 2 with radiating element 1, forms base drive structure.
The present invention compared with prior art, has the following advantages that：
1) present invention is as a result of the polarization conversion surface being made up of four polarization conversion unit groups, adjacent polarized conversion
The electromagnetic wave that unit group is reflected is because polarised direction is mutually offseted on the contrary, so as to effectively reduce radar cross section.
2) it is of the invention because the resonant frequency of polarization conversion unit is identical with operating frequency of antenna, finally in Antenna Operation frequency
The radar cross section of antenna is reduced in band.And because the polarization conversion unit has four frequency characteristics, outside antenna operating band
Still radar cross section can be effectively reduced, good scattering properties is finally realized in broadband.
3) present invention is eliminated by the size by adjusting the square area formed by four polarization conversion unit groups
Due to introducing the influence that polarization conversion surface is produced to antenna radiation characteristics, it is ensured that antenna radiation performance is basicly stable.
Brief description of the drawings
Fig. 1 is the overall structure figure of existing micro-strip paster antenna；
Fig. 2 is the sectional structure chart of the present invention；
Fig. 3 is the overlooking structure figure of the present invention；
Fig. 4 is the structural representation of the polarization conversion unit in the present invention；
Fig. 5 is the S parameter characteristic schematic diagram of the polarization conversion unit in the present invention；
Fig. 6 is of the invention and existing micro-strip paster antenna S parameter curve comparison figure；
Fig. 7 is of the invention and existing micro-strip paster antenna is in x-z faces and the antenna pattern of y-z plane；
Fig. 8 is of the invention and existing micro-strip paster antenna is respectively under x polarization and the irradiation of y polarized electromagnetic waves with angle change
Radar cross section comparison diagram；
Fig. 9 is of the invention to change respectively in the case where x polarization and y polarized electromagnetic waves are irradiated with frequency with existing micro-strip paster antenna
Radar cross section comparison diagram.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings
Embodiment 1：
Reference picture 2, the present invention includes radiating element 1, dielectric-slab 2, metal floor 3, coaxial fitting 4 and polarization conversion surface
5.Dielectric-slab 2 uses dielectric constant for 4.4, and length of side L is the square dielectric materials of 80mm, and its thickness h is 2mm；In dielectric-slab 2
Radiating element 1 is printed with the geometric center of upper surface, the radiating element 1 uses profile for the metal patch of square, its length of side w
For 15.6mm, polarization conversion surface 5 is printed with the surrounding of the upper surface radiating element 1 of dielectric-slab 2.In the lower surface of dielectric-slab 2
Metal floor 3 is printed with, the shapes and sizes of the metal floor 3 are identical with dielectric-slab 2.Set in the immediate vicinity of dielectric-slab 2
There is via, the inner core 41 of coaxial fitting 4 is welded through the via with radiating element 1, and outer core 42 is connected with metal floor 3, formed
Base drive structure.
Reference picture 3 and Fig. 4, the circumference on polarization conversion surface 5 are square, by being distributed in the surrounding of radiating element 1
Four polarization conversion unit groups 51 are constituted.Each polarization conversion unit group 51 is respectively by 15 polarization conversion units 511 in X-direction
Constituted with the arrangement of the cycle such as Y-direction, and in a default polarization conversion unit 511, four poles at the drift angle of radiating element 1
Change converting unit group 51 and form length of side M=23mm, the square area 6 around radiating element 1.
Polarization conversion unit 511 is that a line width S3 is 1.0mm, the symmetrical junction constituted by the line segment bent several times
Structure.The circumference of the symmetrical structure is that length of side S1 is 9mm square, and it is 3mm's to be provided with length of side S2 on the diagonal
Square notch 512.
The above-mentioned low radar cross section micro-strip paster antenna based on polarization conversion, it is characterised in that polarization conversion unit group 51 is
By n polarization conversion unit 511, in the cycle such as X-direction and Y-direction, arrangement is constituted, n >=8, in the apex close to radiating element 1
A default polarization conversion unit 511, for forming the square area 6 in the middle of polarization conversion surface 5；Adjacent polarized conversion is single
The sensing of the square notch 512 of polarization conversion unit 511 in tuple 51 differs 90 °.
The above-mentioned low radar cross section micro-strip paster antenna based on polarization conversion, it is characterised in that polarization conversion unit 511 has
There are four resonant frequencies, its lowest resonant frequency is the existing micro- of 15.6mm square-shaped metal paster with the length of side of radiating element 1
Working frequency with paster antenna is identical.
The sensing of the square notch 512 of polarization conversion unit 511 in each polarization conversion unit group 51 is identical, refers both to
To or backward radiation cell orientation, therefore adjacent polarized converting unit group 51 in the square notch 512 of polarization conversion unit 511
Sensing differ 90 °.The polarization of ele that adjacent converting unit group 51 is reflected is in opposite direction and offsets, so as to effectively reduce
Radar cross section.
Embodiment 2：
Embodiment 2 is identical with the structure of embodiment 1, and only partial parameters are adjusted.
The length of side M=19mm of square area 6；The line width S3=0.9mm of polarization conversion unit 511
Embodiment 3：
Embodiment 3 is identical with the structure of embodiment 1, and only partial parameters are adjusted.
The length of side M=20mm of square area 6；The line width S3=1.1mm of polarization conversion unit 511
Advantages of the present invention can be further illustrated by the emulation of embodiment 1：
1st, emulation content
1.1) polarization conversions of the business simulation software CST Microwave Studio 2011 to above-described embodiment 1 is utilized
The S parameter of unit 511 carries out simulation calculation in the range of 3.0-12.0GHz, as a result as shown in Figure 5.
1.2) S parameter of above-described embodiment 1 is existed using business simulation software CST Microwave Studio 2011
Simulation calculation is carried out in the range of 4.0-4.6GHz, as a result as shown in Figure 6.
1.3) far-field radiations of the business simulation software CST Microwave Studio 2011 to above-described embodiment 1 is utilized
Directional diagram carries out simulation calculation at 4.3GHz, as a result as shown in fig. 7, wherein：7 (a) is embodiment micro-strip paster antenna in x-z
The antenna pattern in face, 7 (b) is antenna pattern of the embodiment micro-strip paster antenna in y-z plane.
1.4) utilize business simulation software CST Microwave Studio 2011 to above-described embodiment 1 at 4.3GHz
Monostatic radar section carry out simulation calculation, and the frequency of incident electromagnetic wave and the working frequency of antenna are identical.Incident electromagnetic wave
Irradiating angle change from -90 ° to+90 °.The monostatic radar section that simulation calculation is obtained with angle change curve such as Fig. 8 institutes
Show.Wherein：8 (a) be the micro-strip paster antenna of embodiment 1 x polarized electromagnetic waves irradiation under, with the monostatic radar section of angle change
With the comparison diagram of existing micro-strip paster antenna, 8 (b) be the micro-strip paster antenna of embodiment 1 y polarized electromagnetic waves irradiation under, with
The monostatic radar section of angle change and the comparison diagram of existing micro-strip paster antenna.
1.5) above-described embodiment 1 is hung down in electromagnetic wave using business simulation software CST Microwave Studio 2011
Monostatic radar section under straight radiation situation carries out simulation calculation, and the frequency of incident electromagnetic wave changes from 2GHz to 12GHz.As a result
As shown in figure 9, wherein：9 (a) be the micro-strip paster antenna of embodiment 1 under x polarized electromagnetic wave vertical irradiations, change with frequency
Monostatic radar section and the comparison diagram of existing micro-strip paster antenna, 9 (b) is the micro-strip paster antenna of embodiment 1 in y polarized electromagnetic waves
The monostatic radar section changed under vertical irradiation with frequency and the comparison diagram of existing micro-strip paster antenna.
2nd, simulation result
Polarization conversion unit used in reference picture 5, inventive antenna can be, 4.2GHz, 6.75GHz, 9GHz and
X polarized electromagnetic waves are converted into y polarized electromagnetic waves at this four frequencies of 12GHz.Due to its structure be it is diagonally symmetrical, because
This can also be converted to x polarized electromagnetic waves accordingly, realize polarization conversion for y polarization incident electromagnetic waves.
Reference picture 6, inventive antenna is in S11During more than 10dB, the working band with 4.23GHz-4.39GHz, opposite band
It is wide by 4%, essentially coincided with the resonant frequency of existing micro-strip paster antenna, this explanation inventive antenna has and existing micro-strip
The similar impedance bandwidth of paster antenna.
Reference picture 7 (a) and Fig. 7 (b), the greatest irradiation directive gain of inventive antenna reach 5.6dBi, in greatest irradiation side
To gain relative to existing micro-strip paster antenna only decline 0.5dBi, without significantly sacrificing, and inventive antenna is most
Large radiation direction is all the time along the normal direction of antenna surface.Illustrate the far field of inventive antenna and existing micro-strip paster antenna
Antenna pattern is essentially coincided.
Reference picture 8 (a) and 8 (b), when the plane wave with antenna with identical working frequency, day is irradiated along certain angle
During line surface, good radar signal interception system can be realized in ± 25 ° of angular range, is antenna table in greatest irradiation direction
13dBsm radar signal interception system can be achieved in the normal direction in face, it is ensured that antenna keeping well in the range of the angular domain
Low radar cross section characteristic.
Reference picture 9 (a) and 9 (b), when the plane wave vertical irradiation that x polarizes and y polarizes is to antenna surface, the present invention is micro-
Radar cross section with paster antenna has obtained good decrement in very wide frequency band, and reduces the work that scope covers antenna
Make frequency band, it is ensured that antenna multipolarization and it is wide band in the case of, still can realize low radar cross section characteristic.
Above simulation result illustrates that inventive antenna can be realized than existing on the premise of good radiance is ensured
The lower radar cross section of micro-strip paster antenna.
Above description and examples, are only the preferred embodiment of the present invention, do not constitute any limitation of the invention, it is clear that right
, all may be in the original based on the present invention after present invention and design principle has been understood for one of skill in the art
In the case of reason and structure, the various modifications and variations in formal and details are carried out, but these are based on inventive concept
Modifications and variations are still within the scope of the claims of the present invention.
Claims (5)
1. a kind of low radar cross section micro-strip paster antenna based on polarization conversion, including radiating element (1), dielectric-slab (2), metal
Floor (3) and coaxial fitting (4)；Radiating element (1) and metal floor are printed with respectively in the upper and lower surface of the dielectric-slab (2)
(3), it is characterised in that：Polarization conversion surface (5) is also printed with the upper surface of dielectric-slab (2), the polarization conversion surface (5) is
It is made up of four polarization conversion unit groups (51), these polarization conversion unit groups are distributed in the surrounding of radiating element (1), middle shape
Into the square area (6) that the length of side is M, M span is 19-23mm；Each polarization conversion unit group (51) is comprising some
Individual polarization conversion unit (511), polarization conversion unit (511) is the periphery wheel that the line segment bent several times by a process is constituted
Wide square symmetrical structure, points in square and is provided with square notch (512) on the diagonal of radiating element (1),
And the square notch (512) of the polarization conversion unit (511) in each polarization conversion unit group (51) points to identical, consecutive roots
The sensing for changing the square notch (512) of the polarization conversion unit (511) in converting unit group (51) differs 90 °.
2. the low radar cross section micro-strip paster antenna according to claim 1 based on polarization conversion, it is characterised in that polarization
Converting unit group (51) be by n polarization conversion unit (511) the cycle such as X-direction and Y-direction arrangement constitute, n >=8, by
The default polarization conversion unit (511) of apex of nearly radiating element (1), for being formed in the middle of polarization conversion surface (5)
Square area (6)；The finger of polarization conversion unit (511) square notch (512) in adjacent polarized converting unit group (51)
To difference 90 °.
3. the low radar cross section micro-strip paster antenna according to claim 1 based on polarization conversion, it is characterised in that described
Radiating element (1) is shaped as square, and the length of side is 15.6mm, and the polarization conversion unit (511) has four resonant frequencies,
Its lowest resonant frequency and work of radiating element (1) length of side for the existing micro-strip paster antenna of 15.6mm square-shaped metal paster
Working frequency is identical.
4. the low radar cross section micro-strip paster antenna according to claim 1 based on polarization conversion, it is characterised in that polarization
The square size dimension S1 of the circumference of converting unit (511) is 9mm, and square notch (512) size dimension S2 is 3mm,
The span for bending the feature sizes S3 of line segment is 0.9-1.1mm.
5. the low radar cross section micro-strip paster antenna according to claim 1 based on polarization conversion, it is characterised in that coaxial
The outer core (42) of joint (4) is connected with metal floor (3), and inner core (41) is connected through dielectric-slab (2) with radiating element (1), shape
Into base drive structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510112415.2A CN104701613B (en) | 2015-03-14 | 2015-03-14 | Low radar cross section micro-strip paster antenna based on polarization conversion |
Applications Claiming Priority (1)
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| CN201510112415.2A CN104701613B (en) | 2015-03-14 | 2015-03-14 | Low radar cross section micro-strip paster antenna based on polarization conversion |
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| CN104701613B true CN104701613B (en) | 2017-07-28 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069238A (en) * | 2016-12-28 | 2017-08-18 | 广东精点数据科技股份有限公司 | Polarized rotation blade unit and polarized rotation piece |
| CN107069233A (en) * | 2016-12-28 | 2017-08-18 | 广东精点数据科技股份有限公司 | Micro-strip paster antenna with low RCS characteristics |
| CN107069232A (en) * | 2016-12-28 | 2017-08-18 | 广东精点数据科技股份有限公司 | The RCS reducing techniques of micro-strip paster antenna |
| CN107579346B (en) * | 2017-08-23 | 2019-10-25 | 西安电子科技大学 | A kind of microstrip antenna of the low radar cross section of ultra wide band |
| CN107591617B (en) * | 2017-08-29 | 2019-11-05 | 电子科技大学 | A kind of SIW back chamber slot antenna of mixing AMC tessellate structure load |
| CN108923125A (en) * | 2018-06-27 | 2018-11-30 | 河南安伏众电子科技有限公司 | Low radar scattering cross section micro-strip paster antenna based on frequency-selective surfaces |
| CN109980359B (en) * | 2019-03-24 | 2024-04-16 | 西安电子科技大学 | Broadband low-RCS antenna based on polarization conversion surface |
| CN115101939B (en) * | 2022-06-13 | 2024-07-23 | 电子科技大学 | Broadband RCS (radio frequency control system) reduced antenna based on polarization rotation super surface |
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| KR20100045824A (en) * | 2008-10-24 | 2010-05-04 | 한국과학기술원 | Microstrip patch antenna and microstrip patch array antenna of low radar cross section |
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