CN108023178A - A kind of directional diagram reconstructable aerial and its phased array - Google Patents
A kind of directional diagram reconstructable aerial and its phased array Download PDFInfo
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- CN108023178A CN108023178A CN201711248743.0A CN201711248743A CN108023178A CN 108023178 A CN108023178 A CN 108023178A CN 201711248743 A CN201711248743 A CN 201711248743A CN 108023178 A CN108023178 A CN 108023178A
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- 238000010295 mobile communication Methods 0.000 abstract description 2
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- 239000011229 interlayer Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/065—Patch antenna array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
- H01Q3/247—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching by switching different parts of a primary active element
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- 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
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a kind of directional diagram reconstructable aerial and its phased array, belongs to microwave antenna art field.Fan-shaped patch of the present invention based on fluting proposes a kind of directional diagram reconstructable aerial, by reconstructing feeding network, the antenna can realize the antenna pattern of four kinds of patterns, realize wave beam in orientation Surface scan, rational group battle array is carried out using direction figure reconfigurable antenna, it is possible to achieve directional diagram carries out one-dimensional, two-dimentional wide-angel beam scanning in pitching face.The configuration of the present invention is simple is novel, and group battle array is convenient, can be widely applied for the fields such as mobile communication, satellite communication and radar.
Description
Technical field
The invention belongs to microwave antenna art field, and in particular to a kind of directional diagram reconstructable aerial and its phased array.
Background technology
Phased array antenna has the characteristics that wave beam quickly scans, and it is had in the field such as radar detection and satellite communication
Irreplaceable effect.But the equipment of phased array antenna system is complicated, and currently used phased array antenna scanning range
It is limited, it is typically limited within ± 50 °.Comprehensive space exploration is realized if desired, then needs the multiple fronts of system configuration
Antenna, which increase the post-processing complexity and project cost of phased array system.Therefore, it is flat with wide-angle scan characteristic
Face phased array antenna becomes the research hotspot in nowadays phased array antenna field.
The concept of reconfigurable antenna is proposed by D.Schaubert in its patent earliest, 1999, advanced in U.S. national defense
Under the subsidy of the restructural bore plan (RECAP) of programme division, reconfigurable antenna technology achieves certain development, but is only limitted to manage
The research of opinion.With the development of the correlation techniques such as the technology of PCB making sheet in recent years, switching technique, more and more reconfigurable antennas
Using the loading of the devices such as PIN diode, varactor, mems switch, realized by way of automatically controlled change on off state
Antenna parameter it is restructural, so as to extend the application field of Reconfiguration Technologies.The research master of domestic reconfigurable antenna technology
If at initial stage 21st century, carried out by University of Electronic Science and Technology Wang Bingzhong professors team, developed at present, reconfigurable antenna
It is theoretical to have tended to be ripe with technology, and wide application is obtained, such as satellite communication system, mobile communication system, electronics feelings
Report, radar and mobile surface targets identification (GMTI) etc..
Common paster antenna due to the limitation of itself radiation beam, its phased array optimum scanning angular range is limited in ±
Within 45 °, therefore, in order to realize the phased array antenna of wide-angle scanning, the document " phased array based on directional diagram reconstructable technology
Wide-angle scan characteristic is studied " disclose the research that a kind of planar phased array wide-angle of incoming direction figure Reconfiguration Technologies scans
Scheme, and by experimental verification, the program can realize ± 75 ° of wide-angle scanning.Since then, directional diagram reconstructable technology
Research in wide-angle scanning is rapidly developed.
Document " An Azimuth-Pattern-Reconfigurable Antenna with Enhanced Gain and
Front-to-Back Ratio " disclose a kind of reconfigurable antenna, realize four kinds of operating modes by reconstructing feeding network, together
When change dielectric substrate bottom artificial structure working cell, can strengthen to some extent directionality and improve radiation gain；
But the antenna overall structure is more complicated, size is big, and required number of switches is more, and the state of controlling switch is relatively complicated.
Document " Compact Pattern-Reconfigurable Monopole Antenna Using Parasitic
Strips " discloses a kind of directional diagram reconstructable aerial, conducting and cut-off state by varying each PIN diode, so that
Change position or the quantity of reflector and director, and then change the radiation direction of antenna, make antenna pattern to different sides
To deflection, the radiation beam of eight kinds of patterns of azimuth plane is realized；But the antenna structure is three-dimensional structure, and volume is big, matching performance is poor,
Carrier deviation amount is big, and exterior biasing circuit is complicated.
Document " 2-D Planar Wide-Angle Scanning Phased Array Based on Wide-Beam
Elements " discloses a kind of phased array antenna, it is passed through using radiating curtain and the forceful electric power magneto-coupling effect of parasitic interlayer
The dot structure of the parasitic layer of reconstruct, changes its CURRENT DISTRIBUTION, so that the beam angle of broadening array antenna unit, realizes phased array
The two-dimentional wide-angle scanning of antenna；But the section of the phased-array antenna array is high, and volume is big, the radiation gain of array antenna unit
Relatively low, the design comparison complexity of parasitic layer by optimizing algorithm, it is necessary to could be realized.
Document " A Novel Wide-Angle Scanning Phased Array Based on Dual-Mode
Pattern-Reconfigurable Elements " disclose a kind of phased array antenna, by the work for controlling reconfigurable cell
Pattern, it is possible to achieve the one-dimensional wide-angle scanning of -81 ° -+81 ° of phased array；But the different works of the array antenna reconfigurable cell
Operation mode frequency offset is big, and the radiation gain of array antenna unit is low, can only realize one-dimensional scanning.
The content of the invention
A kind of the defects of the purpose of the present invention is overcoming the above-mentioned prior art, there is provided directional diagram reconstructable aerial and its phased
Battle array.
Technical problem proposed by the invention so solves：
A kind of directional diagram reconstructable aerial, including four fan beam patches 1,2,3,4, four rectangle parasitic patch 5,6,
7th, 8,14, four circular parasitic patch 9, first medium substrate 16, metal floors 15, second medium substrate feed probes
10th, 11,12,13 and feeding network 17；Two gaps are provided with each fan beam patch；Four fan beam patches and four
A rectangle parasitic patch equidistantly intersects placement；Circular parasitic patch is positioned at the center of four fan beam patches；Four rectangles
Parasitic patch and the surrounding of first medium substrate 16 are placed in parallel；Four fan beam patches 1, the parasitic patch of 2,3,4, four rectangles
Piece 5,6,7,8, circular parasitic patch 9 are respectively positioned on the upper surface of first medium substrate 16；Metal floor 15 is situated between positioned at first
The lower surface of matter substrate 16 and the upper surface for being located at second medium substrate 14；Feeding network 17 is located under second medium substrate 14
Surface；Four feed probes 10,11,12,13 are stretched out by feeding network 17, through first medium substrate 16,15 and of metal floor
Second medium substrate 14 is connected with four fan beam patches 1,2,3,4 respectively；
Feeding network 17 includes three microstrip lines 33,34,35, four feed minor matters 36,37,38,39, six bis- poles of PIN
It is inclined that pipe switchs 18,19,20,21,22,23, four capacitances 29,30,31,32, five inductance 24,25,26,27,28, five direct currents
Put line P1, P2, P3, P4, P5；First microstrip line 33 is divided by the first pin diode switch 18 and the second pin diode switch 19
It is not connected with the second microstrip line 35 and the 3rd microstrip line 34；Four feed minor matters are respectively placed in the both sides of the first microstrip line 33,
It is distributed in mirror symmetry；First microstrip line 33 is connected by the 5th inductance 28 with the first direct current biasing line P1；Second microstrip line
35 by the 3rd pin diode switch 20, the first capacitance 29 and the 4th pin diode switch 21, the second capacitance 30 respectively with
One feed minor matters 36 and second feed minor matters 37 and connect；3rd microstrip line 34 passes through the 6th pin diode switch 23, the 3rd capacitance
31 and the 5th pin diode switch 22, the 4th capacitance 32 feed minor matters 39 with the 3rd feed minor matters 38 and the 4th respectively and be connected；The
Second direct current biasing line P2 is connected by the first inductance 24 between three pin diode switches 20 and the first capacitance 29；4th PIN bis-
The 3rd direct current biasing line P3 is connected by the second inductance 25 between pole pipe switch 21 and the second capacitance 30；6th PIN diode is opened
The 4th direct current biasing line P4 is connected by the 3rd inductance 26 between 23 and the 3rd capacitance 31 of pass；5th pin diode switch, 22 He
The 5th direct current biasing line P5 is connected by the 4th inductance 27 between 4th capacitance 32；
First feed probes 10 are connected with the end of the first feed minor matters 36, the second feed probes 11 and the 4th feed minor matters
39 end is connected, and the 3rd feed probes 12 are connected with the end of the 3rd feed minor matters 38, the 4th feed probes 13 and the second feedback
The end of electric minor matters 37 is connected；
It is positive and negative that DC offset voltage is connected by varying four groups of direct current biasing line P1 and P2, P1 and P3, P1 and P4, P1 and P5
The position of pole, so as to change four groups of switches 18 and 20,18 and the on off operating mode of 21,19 and 23,19 and 22, and then changes feed and visits
The working status of pin 10,11,12,13, encourages different fan beam patches, obtains four kinds of operating modes of antenna；
The wide-angle scanning phased array of a kind of directional diagram reconstructable aerial, by directional diagram reconstructable aerial as described above
Radiation patch rotates 32 ° with feed structure and as element antenna counterclockwise；The feed structure of element antenna is using feed
Network 17 or coaxial feed；Element antenna is arranged in one-dimensional linear or two dimensional surface array.
The beneficial effects of the invention are as follows：
(1) directional diagram reconstructable aerial of the present invention is using excitation patch and the design of feeding network phase separation；Feed
Network is placed in underlying dielectric substrate back, can reduce influence of the biasing circuit to antenna radiation performance, while easy to change feedback
The position of electricity；By controlling the switch on and off state of feeding network, the directional diagram of four kinds of patterns can be obtained, so as to fulfill wave beam
Covered all around in the azimuth plane of upper half-space；In different modes, working frequency is held essentially constant antenna, pattern beam
It can be deflected according to demand to different directions；Compared with common directional diagram reconstructable aerial, directional diagram reconstructable of the present invention
Antenna has the gain of higher；Antenna structure is novel simple, small, light-weight, it is easy to process with it is integrated；
(2) radiation patch of directional diagram reconstructable aerial of the present invention is sector structure, by opening difference on patch
Quantity or the line of rabbet joint of different shapes, can reduce the size of antenna, so as to reduce array pitch, reduce the radiation graing lobe of array；
(3) reconfigurable cell rotates by a certain angle counterclockwise in directional diagram reconstructable array of the present invention, can make its spoke
Penetrate directional diagram deviation XOZ or YOZ faces；The radiation gain of antenna element is high, so as to improve the radiation gain of array；
(4) design of array element uses two-layered medium plate in the present invention, thus can reduce the coupling between array element
Effect, so that when carrying out angle scanning, can keep good matching；
(5) directional diagram reconstructable aerial of the present invention can use the design of single-layer medium plate, and coaxial feed replaces feed
Network, can also realize that high-gain is covered with wave beam in the comprehensive face of upper half-space, while reduce the complexity of antenna；
(6) the radiation main beam of reconfigurable antenna unit is all inclined to XOZ and YOZ planes respectively in the present invention, can pass through
Rational group battle array realizes good one-dimensional, the scanning of two dimensional phased battle array wide-angle.
Brief description of the drawings
Fig. 1 is the structure diagram of antenna of the present invention；
Fig. 2 is the structure diagram of antenna feeding network of the present invention；
Fig. 3 is the three-dimensional radiation directional diagram of four kinds of operating modes, wherein (a) LD patterns；(b) LU patterns；(c) RD patterns；
(d) RU patterns；
Fig. 4 is four kinds of operating modes of reconfigurable antenna, wherein (a) azimuth plane antenna pattern；(b)S11With the change of frequency
Change figure；
Fig. 5 is phased array linear array structure diagram described in embodiment two；
Fig. 6 is the structure diagram of array element in phased array described in embodiment two；
Fig. 7 is the performance chart of four kinds of operating modes of element antenna in embodiment two, wherein the direction under (a) LD patterns
Figure；(b) directional diagram under LU patterns；(c) directional diagram under RD patterns；(d) directional diagram under RU patterns；(e)S11With frequency
Change schematic diagram；
Fig. 8 is linear scan array performance plot described in embodiment two, wherein when (a) scanning angle is -74 °, each antenna
The S of unit11With the change of frequency；(b) YOZ bears half-plane angle scanning variation diagram under RD operating modes；
Fig. 9 is planar phased array structures schematic diagram described in embodiment three；
Figure 10 is phase-array scanning performance plot described in embodiment three, wherein (a) YOZ bears half-plane angle scanning；(b) scan
S during theta=-74 ° of angle11Variation diagram.
Embodiment
The present invention is further detailed with reference to the accompanying drawings and examples.
A kind of directional diagram reconstructable aerial, its structure chart is as shown in Figure 1, including four fan beam patches 1,2,3,4, four
A rectangle parasitic patch 5,6,7,8, circular parasitic patch 9, first medium substrate 16, metal floor 15, a second medium base
14, four feed probes 10,11,12,13 of piece and feeding network 17；Two gaps are provided with each fan beam patch；Four
A fan beam patch equidistantly intersects placement with four rectangle parasitic patch；Circular parasitic patch is pasted positioned at four fan beams
The center of piece；Four rectangle parasitic patch and the surrounding of first medium substrate 16 are placed in parallel；
Four fan beam patches 1,2,3,4, four rectangle parasitic patch 5,6,7,8, circular 9 equal position of parasitic patch
In the upper surface of first medium substrate 16；Metal floor 15 is located at the lower surface of first medium substrate 16 and is located at second medium base
The upper surface of piece 14；Feeding network 17 is located at the lower surface of second medium substrate 14；Four feed probes 10,11,12,13 are by presenting
Electric network 17 stretches out, through first medium substrate 16, metal floor 15 and second medium substrate 14 respectively with four fan beams
Patch 1,2,3,4 is connected；
The structure of feeding network 17 as shown in Fig. 2, including three microstrip lines 33,34,35, four feed minor matters 36,37,
38th, 39, six pin diode switches 18,19,20,21,22,23, four capacitances 29,30,31,32, five inductance 24,25,
26th, 27,28, five direct current biasing lines P1, P2, P3, P4, P5；First microstrip line 33 passes through the first pin diode switch 18 and
Two pin diode switches 19 are connected with the second microstrip line 35 and the 3rd microstrip line 34 respectively；Four feed minor matters are respectively placed in
The both sides of first microstrip line 33, are distributed in mirror symmetry；First microstrip line 33 passes through the 5th inductance 28 and the first direct current biasing line
P1 is connected；Second microstrip line 35 by the 3rd pin diode switch 20, the first capacitance 29 and the 4th pin diode switch 21,
Second capacitance 30 feeds minor matters 37 with the first feed minor matters 36 and second respectively and is connected；3rd microstrip line 34 passes through the 6th PIN bis-
Pole pipe switch the 23, the 3rd capacitance 31 and the 5th pin diode switch 22, the 4th capacitance 32 respectively with the 3rd feed minor matters 38 and the
Four feed minor matters 39 connect；It is straight by the connection second of the first inductance 24 between 3rd pin diode switch 20 and the first capacitance 29
Flow offset line P2；The 3rd direct current biasing is connected by the second inductance 25 between 4th pin diode switch 21 and the second capacitance 30
Line P3；The 4th direct current biasing line P4 is connected by the 3rd inductance 26 between 6th pin diode switch 23 and the 3rd capacitance 31；The
The 5th direct current biasing line P5 is connected by the 4th inductance 27 between five pin diode switches 22 and the 4th capacitance 32；
First feed probes 10 are connected with the end of the first feed minor matters 36, the second feed probes 11 and the 4th feed minor matters
39 end is connected, and the 3rd feed probes 12 are connected with the end of the 3rd feed minor matters 38, the 4th feed probes 13 and the second feedback
The end of electric minor matters 37 is connected；
It is positive and negative that DC offset voltage is connected by varying four groups of direct current biasing line P1 and P2, P1 and P3, P1 and P4, P1 and P5
The position of pole, so as to change four groups of switches 18 and 20,18 and the on off operating mode of 21,19 and 23,19 and 22, and then changes feed and visits
The working status of pin 10,11,12,13, encourages different fan beam patches, obtains four kinds of operating modes of antenna.
Embodiment one
The dielectric substrate that the present embodiment uses be relative dielectric constant for 4.4 polytetrafluoroethylene (PTFE) (F4BM) material；It is fan-shaped
The radius of radiation patch is approximately equal to 0.7 waveguide wavelength, and the angle of fan beam patch is 90 °, single fan beam patch
Area is about square of 0.324 waveguide wavelength.
The feed port of four kinds of operating modes of antenna described in the present embodiment is as shown in the table：
Pattern LD：Coaxial probe 12 is fed, and the conducting of switch 18,21, switch 19,20,22 and 23 disconnects, and antenna pattern is inclined
To phi=164 ° of direction, theta=30 ° of the angle of offset units normal direction, greatest irradiation gain is 7.2dBi, 3dB wave covers
Scope is in phi=164 ° of plane, and for theta from -10.2 ° to 60.0 °, centre frequency 5.3GHz, -10dB bandwidth range are 5.147-
5.417GHz；
Pattern LU：Coaxial probe 11 is fed, and the conducting of switch 18,20, switch 19,21,22 and 23 disconnects, and antenna pattern is inclined
To phi=26 ° of direction, theta=24 ° of deviation angle；Greatest irradiation gain is 7.08dBi, and 3dB beam coverages are in phi
=26 ° of faces, for theta from -7.2 ° to 58.3 °, centre frequency 5.3GHz, -10dB bandwidth range are 5.16-5.41GHz；
Pattern RD：Coaxial probe 13 is fed, and the conducting of switch 19,23, switch 18,20,21 and 22 disconnects, and antenna pattern is inclined
To phi=12 ° of direction, theta=-30 ° of deviation angle；Greatest irradiation gain is 7.24dBi, and 3dB beam coverages are in phi
=12 ° of faces, for theta from -66.4 ° to 3.5 °, centre frequency 5.3GHz, -10dB bandwidth range are 5.09-5.54GHz；
Pattern RU：Coaxial probe 10 is fed, and the conducting of switch 19,22, switch 18,20,21 and 23 disconnects, and antenna pattern is inclined
To phi=158 ° of direction, theta=-24 ° of deviation angle, greatest irradiation gain is 7.09dBi, and 3dB beam coverages exist
Phi=158 ° of face, for theta from -58.9 ° to 7.8 °, centre frequency 5.3GHz, -10dB bandwidth range are 5.16-5.41GHz；
The three-dimensional radiation directional diagrams of above-mentioned four kinds of patterns is as shown in figure 3, the S parameter of four kinds of patterns and the radiation side of azimuth plane
It is as shown in Figure 4 to figure.
Embodiment two
The present embodiment provides a kind of directional diagram reconstructable linear phase controlled array, its structure diagram is as shown in figure 5, in order to which make can
The antenna pattern deviation XOZ faces of reconfigurable antenna unit or YOZ faces, will by 32 ° of the rotation counterclockwise of antenna described in embodiment one
The antenna is as element antenna；The feed structure of the present embodiment substitutes above-mentioned feeding network using coaxial feed, good in order to realize
Good matching, feed probes need the marginal point a certain distance for deviateing fan-shaped patch, the structure of antenna element as shown in fig. 6,
The three-dimensional radiation directional diagram of its S parameter and resonant frequency point is as shown in Figure 7.As seen from the figure four kinds of pattern LU, LD of antenna element,
The antenna pattern of RU, RD deviate 30 ° of normal direction, and have good matching performance.
Said units antenna is arranged in along y-axis to 1 × 5 array, the interval d between element antennasAbout
0.71 wavelength, edge interval is about 0.035 wavelength between element antenna；The dielectric substrate that the present embodiment uses is opposite dielectric
Constant is 4.4 polytetrafluoroethylene (PTFE) (F4BM) material；By varying the operating mode of the reconfigurable cell in array, it is possible to achieve
The one-dimensional wide-angle scanning of YOZ planes.
For above-mentioned array when YOZ planes carry out angle scanning, its element antenna works in RD patterns；YOZ flat scannings
When, due to pattern RD and LU rotational symmetry, and antenna pattern is mirrored into symmetrically, therefore case study on implementation of the present invention two is only to linear
The negative half-plane scanning of the YOZ planes of array is studied, i.e., the operating mode of corresponding array reconfigurable antenna unit is whole
For RD patterns.When needing to be scanned the positive half space of YOZ planes, the pattern of array element is all in LU patterns.
YOZ bear the angle scanning scope of half space and in maximum scan angle corresponding array antenna unit S11Change
As shown in Figure 8.The main beam scanning range of array is -2 ° to -74 °, and 3dB beam coverages are from -87 ° to 5 °, greatest irradiation
Gain is 12.295dBi；When scanning angle is up to -74 ° of maximum, its radiation gain is 11.175dBi, and gain fluctuation scope is small
In 1.12dB, centre frequency is 5.28GHz (S11<- 15dB), therefore there are good radiation and matching properties.
Embodiment three
The present embodiment provides a kind of directional diagram reconstructable planar phased array, its structure diagram is as shown in figure 9, its day
Line unit is using the antenna element described in embodiment two, equally using coaxial feed；Element antenna is arranged into 5 × 5 two dimension
Array, the interval between element antenna are about 0.71 wavelength, and edge interval is about 0.035 wavelength between element antenna；This
The dielectric substrate that embodiment uses be relative dielectric constant for 4.4 polytetrafluoroethylene (PTFE) (F4BM) material；By controlling in array
Reconfigurable cell operating mode, it is possible to achieve the two-dimentional wide-angle of XOZ and YOZ planes scans.
When the unit of flat two-dimensional arrays is all in RD patterns, the angle scanning that half-plane is born in YOZ can be realized, its angle
Degree scanning range S parameter corresponding with maximum scan angle is as shown in Figure 10, and the YOZ of two-dimensional array bears half-plane scanning angle
From -87 ° to 5 °, and it can realize preferable matching, in theta=-74 ° of scanning angle, S11<-15dB。
When needing to be scanned the positive half space of YOZ planes, the operating mode of flat two-dimensional arrays unit is all in LU
Pattern；When bearing half space to XOZ planes and being scanned, the operating mode of array element is all in LD patterns；And to XOZ planes just
When half space is scanned, the operating mode of array element is all in RU patterns.
Since the antenna pattern of array element is in mirror symmetry (RD and LU, LD and RU), and case study on implementation of the present invention three
Flat two-dimensional arrays unit entirety arrangement for square, therefore, when respectively to the positive half space of YOZ planes, XOZ planes
When negative half space and the positive half space of XOZ planes are scanned, it can also realize and the YOZ planes scan performance that to bear half space identical.
Claims (5)
1. a kind of directional diagram reconstructable aerial, it is characterised in that including four fan beam patches (1,2,3,4), four rectangles
Parasitic patch (5,6,7,8), circular parasitic patch (9), first medium substrate (16), metal floor (15), a second medium
Substrate (14), four feed probes (10,11,12,13) and feed structure；Two seams are provided with each fan beam patch
Gap；Four fan beam patches equidistantly intersect placement with four rectangle parasitic patch；Circular parasitic patch is located at four sectors
The center of radiation patch；Four rectangle parasitic patch and the surrounding of first medium substrate (16) are placed in parallel；Four fan beams
Patch (1,2,3,4), four rectangle parasitic patch (5,6,7,8), a circular parasitic patch (9) are respectively positioned on first medium substrate
(16) upper surface；Metal floor (15) is located at the lower surface of first medium substrate (16) and positioned at second medium substrate (14)
Upper surface；Feed structure is located at the lower surface of second medium substrate (14)；Four feed probes (10,11,12,13) are tied by feed
Structure stretch out, through first medium substrate (16), metal floor (15) and second medium substrate (14) respectively with four fan beams
Patch (1,2,3,4) is connected.
2. directional diagram reconstructable aerial according to claim 1, it is characterised in that the feed section is feeding network
(17), feeding network (17) includes three microstrip lines (33,34,35), four feed minor matters (36,37,38,39), six PIN bis-
Pole pipe switch (18,19,20,21,22,23), four capacitances (29,30,31,32), five inductance (24,25,26,27,28), five
Root direct current biasing line；First microstrip line (33) passes through the first pin diode switch (18) and the second pin diode switch (19) point
It is not connected with the second microstrip line (35) and the 3rd microstrip line (34)；Four feed minor matters are respectively placed in the first microstrip line (33)
Both sides, are distributed in mirror symmetry；First microstrip line (33) is connected by the 5th inductance (28) with the first direct current biasing line；Second
Microstrip line (35) passes through the 3rd pin diode switch (20), the first capacitance (29) and the 4th pin diode switch (21), second
Capacitance (30) is connected with the first feed minor matters (36) and the second feed minor matters (37) respectively；3rd microstrip line (34) passes through the 6th
Pin diode switch (23), the 3rd capacitance (31) and the 5th pin diode switch (22), the 4th capacitance (32) are respectively with the 3rd
Feed minor matters (38) and the 4th feed minor matters (39) connection；Lead between 3rd pin diode switch (20) and the first capacitance (29)
Cross the first inductance (24) and connect the second direct current biasing line；Pass through between 4th pin diode switch (21) and the second capacitance (30)
Second inductance (25) connects the 3rd direct current biasing line；Pass through between 6th pin diode switch (23) and the 3rd capacitance (31)
Three inductance (26) connect the 4th direct current biasing line；Pass through the 4th between 5th pin diode switch (22) and the 4th capacitance (32)
Inductance (27) connects the 5th direct current biasing line；
First feed probes (10) are connected with the end of the first feed minor matters (36), the second feed probes (11) and the 4th feed branch
The end of section (39) is connected, and the 3rd feed probes (12) are connected with the end of the 3rd feed minor matters (38), the 4th feed probes
(13) end with the second feed minor matters (37) is connected.
3. a kind of directional diagram reconstructable phased array, it is characterised in that by directional diagram reconstructable aerial as claimed in claim 1
Radiation patch rotates 32 ° with feed structure and as element antenna counterclockwise；The feed structure of element antenna is transmission network
Network (17) or coaxial feed；Element antenna is arranged in one-dimensional linear or two dimensional surface array.
4. directional diagram reconstructable aerial according to claim 2, it is characterised in that connect by varying four groups of direct current biasing lines
The position of DC offset voltage positive and negative anodes is connect, so that changing four groups switches on-off state, and then changes the work of feed probes
State, encourages different fan beam patches, obtains four kinds of operating modes of antenna.
5. directional diagram reconstructable aerial according to claim 1, it is characterised in that by varying groove on fan beam patch
Quantity or shape, thus it is possible to vary the path of electric current on fan beam patch, and then change the antenna pattern of antenna, while energy
Enough reduce the size of antenna or change the operating frequency range of antenna.
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| CN201711248743.0A CN108023178B (en) | 2017-12-01 | 2017-12-01 | directional diagram reconfigurable antenna and phased array thereof |
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| CN201711248743.0A CN108023178B (en) | 2017-12-01 | 2017-12-01 | directional diagram reconfigurable antenna and phased array thereof |
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| CN108023178B CN108023178B (en) | 2019-12-10 |
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| CN108767481A (en) * | 2018-05-29 | 2018-11-06 | 电子科技大学 | A kind of directional diagram reconstructable RECTIFYING ANTENNA of broad beam |
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