CN104393417B - A kind of ultra wideband dual polarization antenna based on orthogonal electromagnet source - Google Patents
A kind of ultra wideband dual polarization antenna based on orthogonal electromagnet source Download PDFInfo
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- CN104393417B CN104393417B CN201410698456.XA CN201410698456A CN104393417B CN 104393417 B CN104393417 B CN 104393417B CN 201410698456 A CN201410698456 A CN 201410698456A CN 104393417 B CN104393417 B CN 104393417B
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Abstract
The present invention relates to microwave and antenna technical field, specifically a kind of orthogonal field components for producing space far-field area by electromagnetic excitation source respectively, can be while the orthogonally polarized component of aware space electromagnetic wave, and then spatially there is more preferable polarization orthogonal characteristic, with the ultra wideband dual polarization antenna based on orthogonal electromagnet source for the signal transacting for realizing complete polarization, it is characterized in that provided with broadband electric excitation source and broadband magnetic pumping source, the broadband electric excitation source is micro belt logarithmic cycle antenna, the broadband magnetic pumping source is the gradual change planar slot antenna with exponential function rule, the micro belt logarithmic cycle antenna as broadband electric excitation source and exponential fade planar slot antenna as broadband magnetic pumping source are orthogonally located, antenna in the present invention spatially has more preferable polarization orthogonal characteristic, that is the polarization characteristic of spatial domain is good, the spatial dimension of cross polarization is bigger, being capable of forming properties more excellent cross polarization passage.
Description
Technical field
It is specifically a kind of remote by electromagnetic excitation source generation space respectively the present invention relates to microwave and antenna technical field
The orthogonal field components of place, are capable of the orthogonally polarized component of aware space electromagnetic wave simultaneously, and then spatially have more preferable
Polarization orthogonal characteristic, with the ultra wideband dual polarization antenna based on orthogonal electromagnet source for the signal transacting for realizing complete polarization.
Background technology
Traditional radio-electronic equipment, such as radio communication and radar detecting equipment, radiation and the electromagnetic wave letter received
Number generally use the signal bandwidth of single polarization mode and relative narrower.In modern and future electronic systems, in order to improve
The service behaviours such as detection resolution, information transfer rate and the channel capacity of radio system, broadband character turns into indispensability
One of requirement.In the information that electromagnetic wave is carried, in addition to amplitude, phase and frequency information, polarization characteristic is a kind of
Information resources in important, its utilization will play a significant role for the performance boost of radio system；In radio system,
Such as radar equipment, Wireless Telecom Equipment and various microwave measurement systems, using dual polarization or the electromagnetic wave signal of complete polarization
Detection and identification target, by the target detection for the system that significantly improves, identification and antijamming capability, while can also improve communication system
Channel capacity, therefore, in modern and following electronic system, often require that there is complete polarization to launch and receive electromagnetism letter for it
Number ability, that is, require the New System electronic system that radio system is complete polarization.It follows that wideband dual polarized radio
Electronic equipment is one of development trend of modern and future electronic equipment.Meanwhile, wideband dual polarized radio-electronic equipment must
Wideband dual polarized antenna equipment must be used, it may be said that during the broadband dual polarized antenna equipment of function admirable is these electronic systems
One of key technology.Broadband dual polarized antenna is provided simultaneously with two kinds of performances of broadband and dual polarization, is that current field of antenna is ground
One of focus studied carefully.Traditional dual polarized antenna be based on orthogonally located electric radiation member or magnetic radiation member composition, they
Space forms orthogonal radiation field, and then constitutes two orthogonal POLARIZATION CHANNELs.
The content of the invention
The present invention is directed to shortcoming and defect of the prior art, it is proposed that one kind can realize wide angular domain in space far-field area
Cross polarization radiation field, the complete polarization component of aware space electromagnetic wave, so realize dual polarization mode of operation based on orthogonal
The ultra wideband dual polarization antenna of electromagnet source.
The present invention can be reached by following measures：
A kind of ultra wideband dual polarization antenna based on orthogonal electromagnet source, it is characterised in that provided with broadband electric excitation source and broadband
Magnetic pumping source, the broadband electric excitation source is micro belt logarithmic cycle antenna, and it meets following formula：
(1)
(2)
It is scale factor in formula, gain and frequency bandwidth of the scale factor according to designing antenna are determined, in the present invention
In, the selection percentage factor is more than 0.8；For the total length of n-th of symmetrical dipole；For the width of n-th of symmetrical dipole；For
Distance of the n symmetrical dipole to antenna virtual " summit "；For the sequence number of symmetrical dipole（From the shaking farthest apart from distributing point
Son is counted, and most long oscillator numbering is 1）；
The broadband magnetic pumping source is the gradual change planar slot antenna with exponential function rule, its exponential fade profile side
Cheng Wei：
（3）
In formula,RFor exponential factor；
The micro belt logarithmic cycle antenna as broadband electric excitation source as the exponential fade in broadband magnetic pumping source with putting down
Face slot antenna is orthogonally located.
In the present invention, in order to reduce the oscillator in the size of log-periodic antenna, log-periodic antenna using tortuous knot
Structure, wherein point shape meander line such as oscillator to realize low-frequency range, micro belt logarithmic cycle antenna employs different scale factors, this
A little scale factors are expressed as：；；, wherein,Value is 0.81,Value is 0.95,Take
It is worth for 0.88.
In order to further improve the characteristic of VSWR of low-frequency range, the assembly line of the log-periodic antenna in the present invention
End be loaded with matched load impedance.
Metal arrays of vias is etched in the present invention on log-periodic antenna assembly line, passes through the metallic vias array, a side
Face reduces the influence that assembly line is fed to broadband magnetic pumping source, and the feed that on the other hand can also meet log-periodic antenna will
Ask, reduce the coupling between electromagnetic excitation source, be conducive to the spacing electromagnetic radiation of dual polarized antenna.
The exponential fade planar slot antenna in broadband magnetic pumping source is used as in the present invention（Vivaldi antennas）Using microstrip line
The feeding classification of turn trough line, the relative dielectric constant of medium substrate is 2.2, and the thickness of medium substrate is 1 millimeter, and metal copper foil is thick
Spend for 0.036 millimeter, it is orthogonally located with log-periodic antenna for the ease of realizing dual-polarized mode of operation, reduce electromagnetism and swash
The coupling between source is encouraged, by the microstrip-fed edge for being transferred to circuit board, the overlapping part away from electromagnetic excitation source realizes two
Being effectively isolated between person, is easy to process and assembles；
Further, in order to reduce occlusion effect of the Vivaldi antennas to log-periodic antenna, improve between electromagnetic excitation source
Isolation characteristic, realize good radiating electromagnetic radiation performance, the present invention according to the CURRENT DISTRIBUTION on Vivaldi antennas floor,
The method optimized using Electromagnetic Simulation, two of the radiating slot with exponential function rule gradual change on Vivaldi antennas floor
Side symmetrically opens up notch, on the premise of the radiation characteristic of Vivaldi antennas is not influenceed, effectively reduce electromagnetic excitation source it
Between occlusion effect, improve the characteristics such as port isolation characteristic and antenna pattern, the cross polarization of dual polarized antenna.
Compared with prior art, the form combined using broadband electric excitation source and broadband magnetic pumping source, design is super by the present invention
Broadband dual polarized antenna device；The dual polarized antenna that traditional orthogonal electric excitation source and orthogonal magnetic pumping source are built is different from, this
The orthogonal field components that the ultra wideband dual polarization antenna proposed is produced space far-field area by electromagnetic excitation source respectively are invented, can be simultaneously
Antenna in the orthogonally polarized component of aware space electromagnetic wave, the present invention spatially has more preferable polarization orthogonal characteristic, i.e.,
The polarization characteristic of spatial domain is good, and the spatial dimension of cross polarization is bigger, can forming properties more excellent cross polarization passage,
On this basis, using digital technology and Microwave Net technology, a variety of polarization modes can be reconstructed, a variety of polarization hairs can be realized
The signal waveform penetrated, realizes the signal processing mode of complete polarization.
Brief description of the drawings：
Accompanying drawing 1 is the front view of the micro belt logarithmic cycle antenna as broadband electric excitation source in the present invention.
Accompanying drawing 2 is the rearview of the micro belt logarithmic cycle antenna as broadband electric excitation source in the present invention.
Accompanying drawing 3 is the front view of the exponential fade planar slot antenna as broadband magnetic pumping source in the present invention.
Accompanying drawing 4 is the rearview of the exponential fade planar slot antenna as broadband magnetic pumping source in the present invention.
Accompanying drawing 5 is the structural representation of the present invention.
Accompanying drawing 6 is the return loss simulation result of middle port of the embodiment of the present invention 1.
Accompanying drawing 7 is the return loss simulation result of middle port of the embodiment of the present invention 2.
Accompanying drawing 8 is the isolation simulation result between middle port of the embodiment of the present invention.
Port 1 when accompanying drawing 9 frequency is 2GHzxozFace gain pattern.
Port 1 when accompanying drawing 10 frequency is 2GHzyozFace gain pattern.
Port 2 when accompanying drawing 11 frequency is 2GHzxozFace gain pattern.
Port 2 when accompanying drawing 12 frequency is 2GHzyozFace gain pattern.
Port 1 when accompanying drawing 13 frequency is 2GHzxozFace axle compares directional diagram.
Port 1 when accompanying drawing 14 frequency is 2GHzyozFace axle compares directional diagram.
Port 2 when accompanying drawing 15 frequency is 2GHzxozFace axle compares directional diagram.
Port 2 when accompanying drawing 16 frequency is 2GHzyozFace axle compares directional diagram.
Port 1 when accompanying drawing 17 frequency is 4GHzxozFace gain pattern.
Port 1 when accompanying drawing 18 frequency is 4GHzyozFace gain pattern.
Port 2 when accompanying drawing 19 frequency is 4GHzxozFace gain pattern.
Port 2 when accompanying drawing 20 frequency is 4GHzyozFace gain pattern.
Port 1 when accompanying drawing 21 frequency is 4GHzxozFace axle compares directional diagram.
Port 1 when accompanying drawing 22 frequency is 4GHzyozFace axle compares directional diagram.
Port 2 when accompanying drawing 23 frequency is 4GHzxozFace axle compares directional diagram.
Port 2 when accompanying drawing 24 frequency is 4GHzyozFace axle compares directional diagram.
Port 1 when accompanying drawing 25 frequency is 6GHzxozFace gain pattern.
Port 1 when accompanying drawing 26 frequency is 6GHzyozFace gain pattern.
Port 2 when accompanying drawing 27 frequency is 6GHzxozFace gain pattern.
Port 2 when accompanying drawing 28 frequency is 6GHzyozFace gain pattern.
Port 1 when accompanying drawing 29 frequency is 6GHzxozFace axle compares directional diagram.
Port 1 when accompanying drawing 30 frequency is 6GHzyozFace axle compares directional diagram.
Port 2 when accompanying drawing 31 frequency is 6GHzxozFace axle compares directional diagram.
Port 2 when accompanying drawing 32 frequency is 6GHzyozFace axle compares directional diagram.
Reference：Broadband electric excitation source 1, broadband magnetic pumping source 2, symmetrical dipole 3, assembly line 4, arrays of vias 5, notch
6th, matched load impedance 7, the feed line of rabbet joint 8, resonator 9, feeding microstrip line 10, the radiating slot with exponential function rule gradual change
11。
Embodiment：
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in accompanying drawing 1- accompanying drawings 5, the present invention proposes a kind of ultra wideband dual polarization antenna based on orthogonal electromagnet source, its
It is characterised by being provided with broadband electric excitation source 1 and broadband magnetic pumping source 2, the broadband electric excitation source 1 is micro belt logarithmic cycle antenna,
It meets following formula：
(1)
(2)
In formulaFor scale factor, gain and frequency bandwidth of the scale factor according to designing antenna are determined, in the present invention
In, the selection percentage factor is more than 0.8；For the total length of n-th of symmetrical dipole 3；For the width of n-th of symmetrical dipole；For
Distance of n-th of symmetrical dipole to antenna virtual " summit "；For the sequence number of symmetrical dipole（From farthest apart from distributing point
Oscillator is counted, and most long oscillator numbering is 1）；
The broadband magnetic pumping source 2 is the gradual change planar slot antenna with exponential function rule, its exponential fade profile
Equation is：
（3）
In formula,RFor exponential factor；
The micro belt logarithmic cycle antenna as broadband electric excitation source 1 and the exponential fade as broadband magnetic pumping source 2
Planar slot antenna is orthogonally located.
In the present invention, in order to reduce the symmetrical dipole in the size of log-periodic antenna, log-periodic antenna using tortuous
Line symmetrical dipole, wherein point shape meander line such as oscillator to realize low-frequency range, micro belt logarithmic cycle antenna employs different ratios
The example factor, these scale factors are expressed as：；；, whereinValue is 0.81,Value is
0.95,Value is 0.88.
In order to further improve the characteristic of VSWR of low-frequency range, the assembly line of the log-periodic antenna in the present invention
4 end is loaded with matched load impedance 7.
Metal arrays of vias 5 is etched in the present invention on log-periodic antenna assembly line 4, passes through the metallic vias array, one
Aspect reduces the influence that assembly line is fed to broadband magnetic pumping source, on the other hand can also meet the feed of log-periodic antenna
It is required that, the coupling between electromagnetic excitation source is reduced, is conducive to the spacing electromagnetic radiation of dual polarized antenna.
The exponential fade planar slot antenna in broadband magnetic pumping source 2 is used as in the present invention（Vivaldi antennas）Using micro-strip
The feeding classification of line turn trough line, the relative dielectric constant of medium substrate is 2.2, and the thickness of medium substrate is 1 millimeter, metal copper foil
Thickness is 0.036 millimeter, orthogonally located with log-periodic antenna for the ease of realizing dual-polarized mode of operation, reduces electromagnetism
Coupling between driving source, by the microstrip-fed edge for being transferred to circuit board, the overlapping part away from electromagnetic excitation source is realized
Being effectively isolated between the two, is easy to process and assembles；
Further, in order to reduce occlusion effect of the Vivaldi antennas to log-periodic antenna, improve between electromagnetic excitation source
Isolation characteristic, realize good radiating electromagnetic radiation performance, the present invention according to the CURRENT DISTRIBUTION on Vivaldi antennas floor,
The monosymmetric of radiating slot 11 with exponential function rule gradual change opens up notch 6 on Vivaldi antennas floor, wherein
The rear end of radiating slot 11 with exponential function rule gradual change is connected with feeder duct 8, is used as the micro-strip logarithm in broadband electric excitation source
Periodic antenna is inserted in radiating slot 11 and feeder duct 8, and is placed with Vivaldi antenna orthogonals, is not being influenceed Vivaldi days
On the premise of the radiation characteristic of line, the occlusion effect between electromagnetic excitation source is effectively reduced, the end of dual polarized antenna is improved
The mouth characteristic such as isolation characteristic and antenna pattern, cross polarization.
Embodiment：
The present invention devises a specific ultra wideband dual polarization antenna assembly based on electromagnetic excitation source, using all-wave electricity
Magnetic simulation software has carried out performance simulation to the antenna, defines the port-for-port 1 of log-periodic antenna, Vivaldi antennas
Port-for-port 2, the return loss characteristic of the two ports is distinguished as shown in Figure 6 and Figure 7, isolation such as Fig. 8 of two ports
It is shown.As seen from the figure, the antenna is about -10dB for the average return loss in the range of 2GHz ~ 6GHz in frequency, average isolation
About 20dB, can meet the application requirement of actual ultra wideband dual polarization electronic system.
In order to characterize the radiation characteristic of the antenna, two principal planes are selected herein, one isxoyPlane, another isyoz
Plane, provides the simulation result of radiant power directional diagram and axle than directional diagram in two principal planes, to illustrate the antenna respectively
Radiation direction characteristic and radiation field polarization characteristic.Fig. 9-Figure 16, Figure 17-24 figures and Figure 25-Figure 32 sets forth this hair
Radiation characteristic when bright 2GHz, 4 GHz and 6GHz, the antenna equal table on two ports of polarizing it can be seen from simulation result
Reveal broad beam directional diagram performance, in the range of main beam, radiation field is approximately linear polarization, but directional diagram show it is certain
Asymmetry；Two polarization ports of the antenna can perceive two polarization of electromagnetic field components respectively, it is possible to achieve dual polarization is wide
The service behaviour of band.
Claims (5)
1. a kind of ultra wideband dual polarization antenna based on orthogonal electromagnet source, it is characterised in that provided with broadband electric excitation source and broadband magnetic
Driving source, the broadband electric excitation source is that the oscillator in micro belt logarithmic cycle antenna, log-periodic antenna uses meandering line structure,
It meets following formula：；；, whereinValue is 0.81,Value is 0.95,Value is
0.88；For the total length of n-th of symmetrical dipole；For the width of n-th of symmetrical dipole；For n-th of symmetrical dipole to antenna
The virtual distance on " summit "；Counted for the sequence number of symmetrical dipole from the oscillator farthest apart from distributing point, most long shakes
Son numbering is 1；
The broadband magnetic pumping source is exponential fade planar slot antenna, and its exponential fade profile equation is：
（3）
In formula,RFor exponential factor；
The micro belt logarithmic cycle antenna as broadband electric excitation source and the exponential fade plane suture as broadband magnetic pumping source
Gap antenna orthogonal is placed.
2. a kind of ultra wideband dual polarization antenna based on orthogonal electromagnet source according to claim 1, it is characterised in that described
The end of the assembly line of log-periodic antenna is loaded with matched load impedance.
3. a kind of ultra wideband dual polarization antenna based on orthogonal electromagnet source according to claim 1, it is characterised in that logarithm
Metal arrays of vias is etched on periodic antenna assembly line.
4. a kind of ultra wideband dual polarization antenna based on orthogonal electromagnet source according to claim 1, it is characterised in that as
The exponential fade planar slot antenna in broadband magnetic pumping source uses the feeding classification of microstrip line turn trough line, relative Jie of medium substrate
Electric constant is 2.2, and the thickness of medium substrate is 1 millimeter, and metal copper foil thickness is 0.036 millimeter, and electricity is transferred to by microstrip-fed
The edge of road plate, the overlapping part away from electromagnetic excitation source.
5. a kind of ultra wideband dual polarization antenna based on orthogonal electromagnet source according to claim 1, it is characterised in that making
Symmetrically open both sides for the radiating slot with exponential function rule gradual change on the Vivaldi antennas floor in broadband magnetic pumping source
If notch.
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105576362A (en) * | 2015-12-25 | 2016-05-11 | 哈尔滨工业大学（威海） | Miniature broadband antenna device |
| CN106058441A (en) * | 2015-12-25 | 2016-10-26 | 哈尔滨工业大学（威海） | Cavity-backed ultra-wideband antenna device |
| CN105896042A (en) * | 2016-04-08 | 2016-08-24 | 东南大学 | Slot antenna of metal via hole stepped-impedance |
| CN106483494B (en) * | 2016-10-13 | 2021-11-02 | 哈尔滨工业大学（威海） | Full polarization interferometer based on space sampling antenna array and parameter estimation method thereof |
| CN107369887A (en) * | 2017-06-28 | 2017-11-21 | 山东航天电子技术研究所 | A kind of high octave dual polarization Vivaldi antennas |
| CN108400433A (en) * | 2018-01-08 | 2018-08-14 | 佛山市顺德区中山大学研究院 | A kind of millimeter wave antenna based on periodically tortuous feeder line structure |
| CN109638438A (en) * | 2018-12-12 | 2019-04-16 | 中国船舶重工集团公司第七二四研究所 | A kind of ultra wide band phased array antenna reducing airspace polarization distortion |
| CN109717871A (en) * | 2018-12-25 | 2019-05-07 | 上海理工大学 | Magnetic labeling location method based on omnidirectional distribution magnetic source |
| CN110416732A (en) * | 2019-08-06 | 2019-11-05 | 深圳市统先科技股份有限公司 | A kind of ultra wideband dual polarization satellite dishes feed |
| CN112103624B (en) * | 2020-09-16 | 2022-11-15 | Oppo（重庆）智能科技有限公司 | Antenna device and electronic apparatus |
| CN111987448B (en) * | 2020-09-18 | 2022-08-12 | 上海无线电设备研究所 | Dual-polarized Vivaldi antenna |
| CN115020972B (en) * | 2022-06-22 | 2023-07-18 | 北京航空航天大学 | Ultra-wideband impedance loading dual-polarized electric small-size Vivaldi antenna |
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