CN107611602A - Terahertz wave band polarization conversion antenna - Google Patents
Terahertz wave band polarization conversion antenna Download PDFInfo
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- CN107611602A CN107611602A CN201710674817.0A CN201710674817A CN107611602A CN 107611602 A CN107611602 A CN 107611602A CN 201710674817 A CN201710674817 A CN 201710674817A CN 107611602 A CN107611602 A CN 107611602A
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- grizzly bar
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Abstract
Terahertz wave band polarization conversion antenna, it is related to antenna technology and function solenoid devices field.The present invention includes being arranged at the semiconductor medium substrate above metallic conductor medium bottom plate, the periodic aerial array of orthogonal arrangement is provided with the upper surface of medium substrate, the aerial array is made up of at least two row antenna elements, each behavior a cycle, include 6 antenna elements per a line, the antenna element includes orthogonal cross axis and the wiregrating being arranged in 4 branches of cross axis, wiregrating in each branch is parallel to each other by 3 and formed perpendicular to the grizzly bar of place branch center line, antenna element forms symmetrical above and below and symmetrical along branch's center line of two mutually perpendicular directions respectively, each grizzly bar length is incremented by one by one from inside to outside, the width of each grizzly bar is equal, spacing between adjacent grill is equal.The present invention realizes to regulate and control the phase of THz wave by monolayer array, and the technique can realize that cost is cheap, easy to process by microfabrication means.
Description
Technical field
The present invention relates to antenna technology and function solenoid devices field.
Background technology
THz wave is a kind of electromagnetic wave new, that have many particular advantages of the frequency range in 0.3THz~10THz.Terahertz
The special performance of technology makes it be had broad application prospects in biomedicine, astronomy, the communication technology, safety check etc..By
It is very high in its frequency, and the energy of Terahertz photon is very low, therefore do not allow destructible to need detected material, this skill
Art can give life and scientific domain brings far-reaching influence, and then change the mode of production and life of people.
Array antenna is with certain regularly arranged and obtained by specifically encouraging by many similar units according to design requirement
The particular antenna structure of radiation characteristic must be expected.Research of planar reflectarray antennas is excellent as both a kind of parabola antenna and phased array
The appearance of gesture combination, there is low section, lightweight and low-loss, these advantages make reflective array antenna in radar system
The fields such as system, survey of deep space and radio astronomy obtain more and more extensive application.With the quick hair of Current wireless communication technology
Exhibition, and proposition of the various countries scientific research personnel to all multiple antennas research fields, have all promoted the generation of new structure antenna.Array day
Line is the design requirement according to us, by changing the various parameters of unit and the material in medium base etc., can be obtained most
Good radiation directivity, this be array antenna it is most prominent the advantages of.The design of reflective array is mainly comprising three aspects：Unit
Design, Array Design, Feed Design, a most important part are unit designs, and determining unit structure is afterwards according to reflected phase
To change the parameter of unit.Finally reflective array is emulated, indices are adjusted.
The phase compensation of reflective array antenna, which mainly has, to be changed minor matters length, changes the side such as unit size, rotary unit angle
Formula, the present invention are main by the way of unit size is changed.Electromagnetic wave two component phases of electric field during propagation are poor
For 0 degree (same to phase) or 180 degree (anti-phase) when, total electric field vector is linear polarization, and electromagnetic wave now is referred to as linear polarization
Ripple；If the electromagnetic field horizontal component of electric field and vertical component amplitude during propagation is constant, phase differs 90 degree, can be with
Circularly polarised wave is obtained, if plane of polarization rotates with the time and with Electromagnetic Wave Propagation direction into right-hand screw relation, then this electromagnetism
Ripple is right-handed polarized wave, conversely, then turning into left-handed polarized wave.
The primary condition that electromagnetic wave produces circularly polarised wave in communication process can be expressed as：On Existential Space two it is orthogonal and
And the linear polarization electric field component that amplitude is equal, phase difference are 90 degree.If incidence wave is linear polarization, electric field passes through medium substrate
When, resolve into two mutually orthogonal, equal electric field components of amplitude, one-component along air borne, another component after
Continuous to be propagated along medium substrate, by adjusting the material and cell parameters of substrate media, the phase difference for making the two components is 90 degree
When, the incident electromagnetic wave of linear polarization is just reflected away in a manner of circular polarisation, therefore produces circularly polarised wave.
In order to avoid the appearance of graing lobe in the antenna pattern in reflective array, radiation direction angle is with array element spacing generally by public affairs
Formula (2-1) is come what is determined.
In formula, d is unit spacing, λ0For electromagnetic wavelength, θ is the deflection angle of reflection main radiation direction.Own in the present invention
Unit spacing is all equal.
The content of the invention
The technical problem to be solved by the invention is to provide the low array reflecting antenna of a kind of simple in construction, easy processing, cost,
Realize conversion of the line polarization wave to circularly polarised wave.
It is terahertz wave band polarization conversion antenna that the present invention, which solves the technical scheme that the technical problem uses, it is characterised in that
Including the medium substrate being arranged above metallic conductor medium bottom plate, the upper surface of medium substrate is provided with the week of orthogonal arrangement
The aerial array of phase property, the aerial array are made up of at least two row antenna elements, each behavior a cycle, are included per a line
6 antenna elements, the antenna element include orthogonal cross axis and the line being arranged in 4 branches of cross axis
Grid, the wiregrating in each branch are parallel to each other by 3 and formed perpendicular to the grizzly bar of place branch center line, antenna element edge respectively
Branch's center line composition of two mutually perpendicular directions is symmetrical above and below and symmetrical, and each grizzly bar length is passed one by one from inside to outside
Increase, the width of each grizzly bar is equal, and the spacing between adjacent grill is equal.The intersection of grizzly bar and cross axis belongs to grid
Bar and cross axis.
In the herein referred cycle, it is for the structure repeated, a cycle is exactly unit (the not antenna list of a repetition
Member).Specific to the antenna element of the present invention, including multirow, each behavior a cycle, i.e., the structure of each row is identical.
Further, in the same row, L=300 μm of the center spacing of adjacent antenna units, metallic conductor medium base plate thickness and
Array antenna thickness is all 0.5 μm, s=10 μm of the line width of array antenna, d=5 μm of the distance between adjacent grill；
In the grizzly bar that line direction is set, most long grizzly bar length is Lx, 111 μm≤Lx≤ 168 μm, the grizzly bar length of vice-minister is
L3=0.6Lx, most short grizzly bar length is L4=0.6L3, the distance between the outside of the most long grizzly bar in two line directions is L6, 79
μm≤L6≤208μm；
In the grizzly bar that alignment direction is set, most long grizzly bar length is Ly, 59 μm≤Ly≤ 228 μm, the grizzly bar length of vice-minister is L1
=0.6Ly, most short grizzly bar length is L2=0.6L1, the distance between the outside of the most long grizzly bar in two alignment directions is L5, 151
μm≤L5≤248μm；
Cross axis width and grill width are all s=10 μm.
In per a line, sequentially sorted from origin or beginning to terminal, in units of micron, the parameter of each antenna element is respectively：
Further, using metallic conductor medium bottom plate as bottom surface, from depression angle, using line direction as left and right directions, described
It is right-hand member to hold as left end, the terminal.
The beneficial effects of the invention are as follows：
(1) array antenna of the invention uses the micro-structural of two dimensional surface, and the phase to THz wave is realized by monolayer array
Regulation and control, and the technique can realize that cost is cheap, easy to process by microfabrication means.
(2) present invention uses plane wave incidence, it is not necessary to other additional complex incentive modes so that mass production is being realized in the invention
Have great advantage.
(3) present invention can be by changing conversion of the parameter realization of unit by linear polarised electromagnetic wave to circular polarisation electromagnetic wave.
Brief description of the drawings：
Fig. 1 is the top view of inventive antenna unit.
Fig. 2 is that Terahertz individual layer reflects unit three-dimensional figure.
Fig. 3 is Terahertz reflective array schematic perspective view.
Fig. 4 is unit reflection phase shift curve map.
Fig. 5 is Electromagnetic Simulation antenna pattern.
In figure：1. metallic conductor medium bottom plate, 2. semiconductor medium substrates, 3. antenna elements.
Table 1：In resonance point 339.5GHz sizes LxAnd LyWithWithCorresponding relation.
Embodiment
Design of the present invention is to design to have in particular terahertz plane wave hereby incident to linear polarization on frequency
The reflective array of special angle, and linear polarization plane wave can be converted to circular polarization plane ripple.The invention uses vertical incidence
Linear polarization plane wave, polarised direction is along Fig. 1Direction, the angle with x-axis and y axle positive directions are 45 °.When line pole
When change Electromagnetic Wave Propagation comes, electric field can be decomposed into the x-directionIn the y-directionDue to the direction of propagation of electric field
Angle with x-axis and y-axis is 45 °, so the edge decomposedDirection andThe electric field component in direction is equal in magnitude, by rationally setting
Count reflector element structure so that horizontal polarized componentsAnd perpendicular polarisation componentsPhase differ 90 °, incident flat of linear polarization
Face ripple has been converted into circular polarization plane ripple.
Artificial micro-structure and quartz medium are combined to form a kind of reflector element structure by the present invention, and arrange shape by two dimensional surface
Into composite array reflecting surface, artificial micro-structure reflected phase is changed by control unit physical dimension, realizes line polarization wave to circle
The conversion of polarized wave.
Global design scheme schematic diagram such as Fig. 1 of the present invention, including：
Metallic conductor medium bottom plate 1, its material are copper,
Semiconductor medium substrate 2, its material are quartz；
Reflector element array structure is set on semiconductor medium substrate 2.
Reflector element is as shown in Fig. 2 using " ten " character form structure ledger line grid, due to the design parameter in X-direction adjacent cells
It is different, so unit interval is generally determined with formula (2-1), L=300 μm of element length in the present invention, specifically
The size of implementation is as shown in table 1.
The present invention is incident using line polarization wave, and feed polarised direction is diagonally and incident into 45 degree with x-axis direction, often
Individual array element should meet：90 degree more than the phase compensation that the phase compensation that y directions are realized is realized than x direction, as shown in figure 4, this hair
" ten " word of bright use adds wire grid construction so that has 10GHz bandwidth, and phase shift smoothness and phase shift near resonance point
Scope can preferably be ensured.
Embodiment：
Referring to Fig. 1~5 (Fig. 3 is only schematic diagram, in figure size and non-critical defer to every structural parameters).
Terahertz wave band polarization conversion antenna, including the semiconductor medium substrate above metallic conductor medium bottom plate is arranged at,
The upper surface of medium substrate is provided with the periodic aerial array of orthogonal arrangement, and the aerial array is by least two row antenna lists
Member is formed, each behavior a cycle, includes 6 antenna elements per a line, the antenna element includes orthogonal cross axis
With the wiregrating being arranged in 4 branches of cross axis, the wiregrating in each branch is parallel to each other by 3 and perpendicular to place
The grizzly bar of branch's center line is formed, and antenna element forms symmetrical above and below and left along branch's center line of two mutually perpendicular directions respectively
Right symmetrical, each grizzly bar length is incremented by one by one from inside to outside, and the width of each grizzly bar is equal, and the spacing between adjacent grill is equal.
Present embodiment is applicable frequency 339.5GHZ, and unit uses " ten " character form structure ledger line grid, due in the adjacent list in x directions
The design parameter of member is different, so unit interval leads to common-used formula (2-1) to determine.If unit spacing obtains not
Properly, graing lobe will be formed.
Test result shows that the embodiment of following structural parameters has optimum performance：
L=300 μm of the center spacing of adjacent antenna units, metallic conductor medium base plate thickness and array antenna thickness are all 0.5 μ
M, s=10 μm of the line width of array antenna, d=5 μm of the distance between adjacent grill；
In the grizzly bar that line direction is set, most long grizzly bar length is Lx, 111 μm≤Lx≤ 168 μm, the grizzly bar length of vice-minister is
L3=0.6Lx, most short grizzly bar length is L4=0.6L3, the distance between the outside of the most long grizzly bar in two line directions is L6, 79
μm≤L6≤208μm；
In the grizzly bar that alignment direction is set, most long grizzly bar length is Ly, 59 μm≤Ly≤ 228 μm, the grizzly bar length of vice-minister is L1
=0.6Ly, most short grizzly bar length is L2=0.6L1, the distance between the outside of the most long grizzly bar in two alignment directions is L5, 151
μm≤L5≤248μm；
Cross axis width and grill width are all s=10 μm.
In per a line, sequentially sorted from origin or beginning to terminal, in units of micron, the parameter of each antenna element is consistent with table 1 respectively.
Using metallic conductor medium bottom plate as bottom surface, from depression angle, using line direction as left and right directions, the origin or beginning is left end,
The terminal is right-hand member.
Table 1
Claims (4)
1. terahertz wave band polarization conversion antenna, it is characterised in that including being arranged at partly leading above metallic conductor medium bottom plate
Body medium substrate, is provided with the periodic aerial array of orthogonal arrangement in the upper surface of medium substrate, the aerial array by
At least two row antenna elements are formed, each behavior a cycle, include 6 antenna elements per a line, the antenna element includes
Orthogonal cross axis and the wiregrating being arranged in 4 branches of cross axis, the wiregrating in each branch are mutually flat by 3
Go and formed perpendicular to the grizzly bar of place branch center line, antenna element is respectively along branch's center line structure of two mutually perpendicular directions
Into symmetrical above and below and symmetrical, each grizzly bar length is incremented by one by one from inside to outside, and the width of each grizzly bar is equal, between adjacent grill
Spacing it is equal.
2. terahertz wave band polarization conversion antenna as claimed in claim 1, it is characterised in that in the same row, adjacent antenna
L=300 μm of the center spacing of unit, metallic conductor medium base plate thickness and array antenna thickness are all 0.5 μm, array antenna
S=10 μm of line width, d=5 μm of the distance between adjacent grill；
In the grizzly bar that line direction is set, most long grizzly bar length is Lx, 111 μm≤Lx≤ 168 μm, the grizzly bar length of vice-minister is
L3=0.6Lx, most short grizzly bar length is L4=0.6L3, the distance between the outside of the most long grizzly bar in two line directions is L6, 79
μm≤L6≤208μm；
In the grizzly bar that alignment direction is set, most long grizzly bar length is Ly, 59 μm≤Ly≤ 228 μm, the grizzly bar length of vice-minister is L1
=0.6Ly, most short grizzly bar length is L2=0.6L1, the distance between the outside of the most long grizzly bar in two alignment directions is L5, 151
μm≤L5≤248μm；
Cross axis width and grill width are all s=10 μm.
3. terahertz wave band polarization conversion antenna as claimed in claim 2, it is characterised in that in per a line, from origin or beginning to end
End is sequentially sorted, and in units of micron, the parameter of each antenna element is respectively：
4. terahertz wave band polarization conversion antenna as claimed in claim 2, it is characterised in that using metallic conductor medium bottom plate as
Bottom surface, from depression angle, using line direction as left and right directions, the origin or beginning is left end, and the terminal is right-hand member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710674817.0A CN107611602B (en) | 2017-08-09 | 2017-08-09 | Polarization conversion antenna of terahertz wave band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710674817.0A CN107611602B (en) | 2017-08-09 | 2017-08-09 | Polarization conversion antenna of terahertz wave band |
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| Publication Number | Publication Date |
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| CN107611602A true CN107611602A (en) | 2018-01-19 |
| CN107611602B CN107611602B (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710674817.0A Active CN107611602B (en) | 2017-08-09 | 2017-08-09 | Polarization conversion antenna of terahertz wave band |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818152A (en) * | 2019-03-18 | 2019-05-28 | 西安电子科技大学 | A kind of line-circular polarisation converter surpassing surface based on resonant cavity |
| CN111009735A (en) * | 2019-12-05 | 2020-04-14 | 电子科技大学 | Broadband circularly polarized frequency scanning super surface |
Citations (5)
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|---|---|---|---|---|
| US20060227422A1 (en) * | 2005-04-12 | 2006-10-12 | Brian Monacelli | Circular polarizer using frequency selective surfaces |
| CN103036042A (en) * | 2011-08-19 | 2013-04-10 | 深圳光启高等理工研究院 | Novel metamaterial |
| CN103036067A (en) * | 2011-03-15 | 2013-04-10 | 深圳光启高等理工研究院 | Radar antenna |
| CN104111110A (en) * | 2014-07-24 | 2014-10-22 | 电子科技大学 | Top-end-extended cross terahertz absorption structure and application thereof |
| CN106877003A (en) * | 2017-03-22 | 2017-06-20 | 桂林电子科技大学 | A kind of reflection-type ultra wide band Terahertz polarization restructural circular polarizer |
-
2017
- 2017-08-09 CN CN201710674817.0A patent/CN107611602B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060227422A1 (en) * | 2005-04-12 | 2006-10-12 | Brian Monacelli | Circular polarizer using frequency selective surfaces |
| CN103036067A (en) * | 2011-03-15 | 2013-04-10 | 深圳光启高等理工研究院 | Radar antenna |
| CN103036042A (en) * | 2011-08-19 | 2013-04-10 | 深圳光启高等理工研究院 | Novel metamaterial |
| CN104111110A (en) * | 2014-07-24 | 2014-10-22 | 电子科技大学 | Top-end-extended cross terahertz absorption structure and application thereof |
| CN106877003A (en) * | 2017-03-22 | 2017-06-20 | 桂林电子科技大学 | A kind of reflection-type ultra wide band Terahertz polarization restructural circular polarizer |
Non-Patent Citations (1)
| Title |
|---|
| HONGEN SU ET.AL: "Terahertz Multi-band reflective polarization converter based on TSRR metamaterial", 《2016 11TH INTERNATIONAL SYMPOSIUM ON ANTENNAS, PROPAGATION AND EM THEORY (ISAPE)》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818152A (en) * | 2019-03-18 | 2019-05-28 | 西安电子科技大学 | A kind of line-circular polarisation converter surpassing surface based on resonant cavity |
| CN109818152B (en) * | 2019-03-18 | 2020-09-04 | 西安电子科技大学 | Linear-circular polarization converter based on resonant cavity super-surface |
| CN111009735A (en) * | 2019-12-05 | 2020-04-14 | 电子科技大学 | Broadband circularly polarized frequency scanning super surface |
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| Publication number | Publication date |
|---|---|
| CN107611602B (en) | 2020-09-15 |
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