CN208723092U - Liquid crystal antenna element and LCD phased array antenna - Google Patents
Liquid crystal antenna element and LCD phased array antenna Download PDFInfo
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- CN208723092U CN208723092U CN201821591959.7U CN201821591959U CN208723092U CN 208723092 U CN208723092 U CN 208723092U CN 201821591959 U CN201821591959 U CN 201821591959U CN 208723092 U CN208723092 U CN 208723092U
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Abstract
A kind of liquid crystal antenna element includes: first substrate；The second substrate is oppositely arranged with the first substrate；Liquid crystal layer, setting is between the first substrate and the second substrate；Transmission line on first surface and is arranged to and extends in a first direction along the first surface；First antenna oscillator is located on the first surface, and is arranged to the elongated dipole extended in a second direction along the first surface；Second antenna oscillator, at the position corresponding to the first antenna oscillator on the surface of the first substrate of the second substrate；And grounding electrode, positioned at the first substrate on the surface of the second substrate.A kind of LCD phased array antenna includes the multiple liquid crystal antenna elements being arranged in an array.
Description
Technical field
The utility model relates to antenna technical field, a kind of liquid crystal antenna element and LCD phased array day are related in particular to
Line.
Background technique
With the development of communication technology, the business of such as " communication in moving " (" Satcom on the move ") etc is obtaining
To extensive use.This requires the antenna of expected performance.Compared with the antenna based on mechanical scanning, phased array antenna is due to saving
It has gone mechanical control mechanism and has had the advantages that tracking accuracy is high, the response time is short etc..Phased array antenna based on liquid crystal material
Also have such as size small, low in energy consumption and be easy to the attendant advantages with the control circuit system integration, thus is considered as that one kind has
The solution of prospect.
Utility model content
One side according to the present utility model provides a kind of liquid crystal antenna element, comprising: first substrate；The second substrate,
It is oppositely arranged with the first substrate；Liquid crystal layer, setting is between the first substrate and the second substrate；Transmission line, position
In on first surface and being arranged to and extend in a first direction along the first surface, the first surface is selected from described the
Composed by the surface towards the first substrate on the surface and the second substrate towards the second substrate of one substrate
Group；First antenna oscillator is located on the first surface, and is arranged to prolong in a second direction along the first surface
The elongated dipole stretched, the dipole include that two extremely son, the first antenna oscillators opened by a gapping interval are matched
It is set in the gap in described two coupled electromagnetic waves extremely between son and the transmission lines；Second antenna oscillator is located at institute
It states at the position corresponding to the first antenna oscillator on the surface of the first substrate of the second substrate, described second
Antenna oscillator has to be extended in this second direction along the surface away from the first substrate of the second substrate
Elongated shape, second antenna oscillator also has the length of the length less than the first antenna oscillator；And ground connection electricity
Pole, positioned at the first substrate on the surface of the second substrate, the grounding electrode is described including being positioned corresponding to
Slender electrode part at the position of first antenna oscillator, the slender electrode part is along the first substrate away from described
The surface of the second substrate extends in this second direction, and the slender electrode part, which has, is greater than first antenna vibration
The length of the length of son.
In some embodiments, the length of second antenna oscillator is the 0.7- of the length of the first antenna oscillator
0.9 times.
In some embodiments, the first substrate and the second substrate are made of identical material, and described
Two substrates have 3-5 times of thickness of the thickness for first substrate.
In some embodiments, the first substrate and the second substrate are made from a variety of materials, and described
The thickness of one substrate and the thickness of the second substrate meet following relationship:
,
Wherein H1 is the thickness of the first substrate, and H2 is the thickness of the second substrate, ε1For the first substrate
Dielectric constant, and ε2For the dielectric constant of the second substrate.
In some embodiments, the second substrate is the composite plate for including multilayer material.
In some embodiments, second antenna oscillator, the first antenna oscillator and slender electrode part quilt
It is arranged such that the center of second antenna oscillator, the center in the gap in the first antenna oscillator and described elongated
The center of electrode section on the direction of the first substrate and the second substrate perpendicular to being overlapped.
In some embodiments, the first direction is perpendicular to the second direction.
In some embodiments, the transmission line includes coplanar waveguide transmission line, which includes signal
Line and two ground wires for being located at the signal wire two sides.
In some embodiments, gap electrical connection of the one end of the signal wire in the first antenna oscillator
To one in the extremely son of the dipole, and one one end in two ground wires is electrically connected in the gap
The dipole extremely son in another.
In some embodiments, the first surface is the surface towards the second substrate of the first substrate, and
And the liquid crystal antenna element further includes the electrode structure on second surface, the second surface is the second substrate
Surface towards the first substrate.
In some embodiments, the first surface is the surface towards the first substrate of the second substrate, and
And the liquid crystal antenna element further includes the electrode structure on second surface, the second surface is the first substrate
Surface towards the second substrate.
In some embodiments, the electrode structure includes being parallel to each other and along the second surface perpendicular to described
The multiple electrodes that the side of first direction upwardly extends.
In some embodiments, the grounding electrode further includes along the first substrate away from the second substrate
The additional electrode part that the surface extends in the direction perpendicular to the second direction from the slender electrode part.
Another aspect according to the present utility model provides a kind of LCD phased array antenna, including is arranged in an array
Multiple liquid crystal antenna elements as described above.
In some embodiments, each first substrate of the multiple liquid crystal antenna element is as a whole by single substrate shape
At, and each the second substrate of the multiple liquid crystal antenna element is formed by another single substrate as a whole.
According to the embodiment being described below, the these and other aspects of the utility model will be apparent it is clear,
And it will be elucidated with reference to the embodiment being described below.
Detailed description of the invention
Below in conjunction with attached drawing in the description of exemplary embodiment, the more details of the utility model, feature and excellent
Point is disclosed, in the accompanying drawings:
Fig. 1 schematically illustrates the top view of the liquid crystal antenna element according to the utility model embodiment；
Fig. 2A schematically illustrates the sectional view of the liquid crystal antenna element of Fig. 1 of the interception of the AA ' line in Fig. 1；
Fig. 2 B schematically illustrates the sectional view of the liquid crystal antenna element of Fig. 1 of the interception of the BB ' line in Fig. 1；
Fig. 3 schematically illustrates the arrangement of first antenna oscillator and transmission line in the liquid crystal antenna element of Fig. 1；
Fig. 4 schematically illustrates the bottom view of the liquid crystal antenna element of Fig. 1；
Fig. 5 shows the two-dimentional far field directional pattern of the liquid crystal antenna element of Fig. 1；
Fig. 6 A and 6B schematically illustrate the sectional view of the liquid crystal antenna element according to another embodiment of the utility model；
And
Fig. 7 schematically illustrates the block diagram of the LCD phased array antenna according to the utility model embodiment.
Specific embodiment
It will be appreciated that although term first, second, third, etc. etc. can be used to describe various elements, portion herein
Part, area, floor and/or part, but these component, assembly units, area, floor and/or part should not be limited by these terms.These arts
Language is only used to mutually distinguish a component, assembly unit, area, floor or part and another area, floor or part.Therefore, discussed below
It is practical new without departing from this that first element, component, area, floor or part can be referred to as second element, component, area, floor or part
The introduction of type.
Such as " ... below ", " ... under ", " under relatively ", " in ... lower section ", " ... on ", " on relatively " etc.
Spatially relative term herein can for ease of description and be used to an elements or features as illustrated in the figures are described
With the relationship of another (a little) elements or features.It will be appreciated that these spatially relative terms intention covers in addition to describing in figure
Orientation except device in use or operation different orientation.For example, being described as if device in flipchart
The element of " under other elements or feature " or " below other elements or feature " or " below other elements or feature "
It will be oriented to " on other elements or feature ".Therefore, exemplary term " ... under " and can cover " in ... lower section "
... on and ... under both orientations.Such as " ... before " or " ... it is preceding " and " ... later " or " followed by " it
The term of class similarly can for example be used to refer to light across element according to order.Device can be oriented to other modes (rotation
It turn 90 degrees or with other orientations) and spatial relative descriptor used herein is interpreted accordingly.In addition, it will also be appreciated that
Be when layer is referred to as " between the two layers ", can be unique layer between two layers, or there may also be
One or more middle layers.
Term used herein is merely for for the purpose of describing particular embodiments and being not intended to limit the utility model.Such as
It is used herein, singular "one", " one " and "the" be intended to also include plural form, unless context clearly separately has
Instruction.It will be further appreciated that term " includes " and/or "comprising" specify addressed spy when used in this manual
The presence of sign, entirety, step, operations, elements, and/or components, but it is not excluded for one or more other features, entirety, step, behaviour
Make, the presence or addition of component, assembly unit and/or its group one or more other features, entirety, step, operation, element, portion
Part and/or its group.As used in this article, term "and/or" includes associated listing one or more of project
Any and all combinations.
It will be appreciated that when element or layer be referred to " on another element or layer ", " be connected to another element or
Layer ", " being coupled to another element or layer " or when " neighbouring another element or layer ", can be directly in another element or layer
It is upper, be directly connected to another element or layer, be directly coupled to another element or layer or be directly adjacent to another element or
Layer, or may exist intermediary element or layer.On the contrary, when element is referred to as " directly on another element or layer ", " directly connects
Be connected to another element or layer ", " being directly coupled to another element or layer ", " being directly adjacent to another element or layer " when, do not have
With the presence of intermediary element or layer.However, under any circumstance " ... on " or shall not be interpreted to want " on directly existing ... "
Ask a layer that following layer is completely covered.
This reality is described with reference to the schematic illustration (and intermediate structure) of the idealized embodiments of the utility model herein
With novel embodiment.Just because of this, it is contemplated that for example as the result of manufacturing technology and/or tolerance for illustrating shape
Variation.Therefore, the embodiments of the present invention should not be construed as being limited to the specific shape in the area illustrated herein, and answer
Including for example due to form variations caused by manufacturing.Therefore, the area illustrated in figure is substantially schematical, and its shape is not
It is intended to the true form in the area of illustrated device and is not intended to limit the scope of the utility model.
Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have practical with this
The normally understood identical meanings of novel those of ordinary skill in the art institute.It will be further appreciated that such as those are logical
Term defined in the dictionary being often used etc should be interpreted as having and it is above and below related fields and/or this specification
The consistent meaning of meaning in text, and will not idealization or it is too formal in the sense that explain, unless herein
It is clearly defined.
Below with reference to the accompanying drawings the embodiments of the present invention are described in detail.
Fig. 1 schematically illustrates the top view of the liquid crystal antenna element 100 according to the utility model embodiment.
As shown in Figure 1, liquid crystal antenna element 100 includes the second substrate 120 and the second antenna oscillator 122.The second substrate 120
It is made of such as glass.Second antenna oscillator 122 is located on the upper surface of the second substrate 120, and has along the second substrate
The elongated shape that 120 upper surface extends in a second direction d 2.
Transmission line 112, first antenna oscillator 118 and the electrode structure 124 indicated by dotted line is also shown in Fig. 1.Dotted line
It is used, because these elements are not formed on the upper surface of the second substrate 120.Transmission line 112 is arranged in first party
Extend on D1 (first direction D1 in this embodiment perpendicular to second direction D2, although it's not necessary；First direction D1
It in some embodiments can be with second direction D2 at any angle).Specifically, transmission line 112 is co-planar waveguide (CPW) transmission
Line comprising signal wire 113 and two ground wires 115,117 for being located at 113 two sides of signal wire.Electrode structure 124 includes phase
Multiple electrodes 125 that are mutually parallel and extending on the direction (in this example, being second direction D2) perpendicular to first direction D1.
It will be appreciated that transmission line 112 shown in Fig. 1 is exemplary, and can be used in other embodiments
The transmission line of any other appropriate type, the co-planar waveguide being such as grounded (CPWG) and common microstrip line.It will be further understood that
Electrode structure 124 shown in Fig. 1 is exemplary, and in other embodiments electrode structure 124 can have it is any its
His pattern appropriate.
Fig. 2A and 2B respectively schematically illustrates the liquid crystal antenna list of the AA ' line in Fig. 1 and Fig. 1 of BB ' line interception
The sectional view of member 100.The structure of liquid crystal antenna element 100 is perhaps shown more clearly in Figures 2 A and 2 B.
With reference to Fig. 2A, liquid crystal antenna element 100 further includes first be oppositely arranged with the second substrate 120 inter alia
Substrate 110 and the liquid crystal layer 130 being arranged between first substrate 110 and the second substrate 120.First substrate 110 is by such as glass
It is made.Liquid crystal layer 130 is comprising liquid crystal molecule (not shown) and with the typical thickness less than 100 μm.Including signal wire 113
It is located on first surface S1 with the transmission line 112 of ground wire 115,117 and is arranged to along first surface S1 D1 in a first direction
Upper extension.In this embodiment, first surface S1 is the surface towards the second substrate 120 of first substrate 110, and the second base
The surface towards first substrate 110 of plate 120 is correspondingly known as second surface S2.125, each electrode of electrode structure 124
It (in this example, is second party in the direction perpendicular to first direction D1 on second surface S2, and along second surface S2
Extend on D2).
Liquid crystal molecule in liquid crystal layer 130 is anisotropy and different Jie is presented on long axis direction and short-axis direction
Electric constant.When in operation, transmission line 112 be used to transmit to/from receiver/transmitter (not shown) electromagnetic wave
Signal, and each electrode 125 of electrode structure 124 is applied modulation voltage to build between electrode 125 and ground wire 115,117
Vertical bias field.The bias field being attributed between electrode 125 and ground wire 115,117, liquid crystal molecule are deflected so that liquid crystal layer
130 dielectric constant changes with the deflection of liquid crystal molecule.When electromagnetic wave signal is changed along transmission line 112 having
When transmitting in the liquid crystal layer 130 of dielectric constant, phase offset occurs to a certain extent for electromagnetic wave signal.Therefore, electromagnetic wave is believed
Number phase offset can be realized by the deflection of the liquid crystal molecule in control liquid crystal layer 130, and the deflection and then can
It is realized with being applied to the modulation voltage of electrode structure 124 by control.This is known as the known technology of liquid crystal phase shifter.Out
In this purpose, liquid crystal antenna element 100 further includes the first both alignment layers 132 being arranged on first surface S1 and is arranged second
The second both alignment layers 134 on the S2 of surface, as shown in Figure 2 A.First both alignment layers 132 and the second both alignment layers 134, such as by polyamides
Imines is made, for setting initial orientation of the liquid crystal molecule in liquid crystal layer 130 in the case where no bias field.First orientation
Layer 132 and the second both alignment layers 134 have a thickness that so that they there are not the electromagnetic wave signal in transmission line 112 substantially
Have an impact.
It will be appreciated that for the dielectric constant of modulation liquid crystal layer 130 purpose and the electrode structure 124(that is provided with
And therefore electrode 125) can even is that in some embodiments it is optional because required bias field can be merely with biography
Defeated line 112 is established.For example, modulation voltage can be applied to the signal wire 113 of transmission line 112, in signal wire 113 and transmission
Required bias field is established between the ground wire 115,117 of line 112.
With reference to Fig. 2 B, liquid crystal antenna element 100 further includes first antenna oscillator 118 inter alia.First antenna vibration
Son 118 is located on first surface S1, and is arranged to the elongated idol extended in a second direction d 2 along first surface S1
It is extremely sub.As shown, the dipole includes two extremely sub- 118A and 118B being spaced apart by a gap 119.First antenna
Oscillator 118 is configured at gap 119 coupled electromagnetic wave between two extremely sub- 118A, 118B and transmission line 112.
Fig. 3 schematically illustrates the exemplary arrangement of first antenna oscillator 118 and transmission line 112.
With reference to Fig. 3, transmission line 112 extends in the first direction dl, and the dipole 118A of first antenna oscillator 118,
118B extends in a second direction d 2.Gap 119 of the one end of the signal wire 113 of transmission line 112 in first antenna oscillator 118
One (in this example, being extremely sub- 118A) that place is electrically connected in extremely sub- 118A, 118B of the dipole, and transmission line
The one end of one (being in this example, ground wire 117) in 112 two ground wires 115,117 is electrically connected to institute at gap 119
Another stated in extremely sub- 118A, 118B of dipole (is in this example, extremely sub- 118B).In the case where emitting scene, transmission line
The electromagnetic wave signal of spontaneous emission in 112 future machine (not shown) is fed to first antenna oscillator 118.Alternatively, in the case where receiving scene,
Received electromagnetic wave signal is fed to transmission line 112 by first antenna oscillator 118, which passes through transmission line in turn
112 are provided to receiver (not shown).
It will be appreciated that although first antenna oscillator 118 and transmission line 112 are shown as mutually hanging down in this embodiment
Directly, but in other embodiments first antenna oscillator 118 and transmission line 112 can be at any angles appropriate (such as mutually
In parallel), although and in this embodiment first antenna oscillator 118 and transmission line 112 be shown as it is directly electrically connected to each other,
Other embodiments are possible.For example, transmission line 112 can be electromagnetically coupled to first day by any intermediate medium appropriate
Linear oscillator 118.
It will be further understood that Fig. 3 shown in first antenna oscillator 118(more specifically, dipole 118A, 118B) figure
Case is exemplary, and first antenna oscillator 118 can be the dipole with other patterns in other embodiments, such as
The folded dipole formed by elongated conductor.Folded dipole is known per se, and formed by elongated conductor this
The folded dipole of sample is still referred to as " elongated " dipole herein.
Fig. 4 schematically illustrates the bottom view of liquid crystal antenna element 100.
With reference to Fig. 4, liquid crystal antenna element 100 further includes grounding electrode 114 inter alia.Grounding electrode 114 includes
Along the slender electrode part 114A of first substrate 110 extended in a second direction d 2 away from the surface of the second substrate 120.Institute
Slender electrode part 114A is stated with length L3.In this example, grounding electrode 114 further includes the back along first substrate 110
The surface from the second substrate 120 on the direction (in this example, being first direction D1) perpendicular to second direction D2 from
The additional electrode part 114B that the slender electrode part 114A extends.
It will be appreciated that grounding electrode 114 shown in Fig. 4 is exemplary, and ground connection electricity in some embodiments
Pole 114 can cover the whole surface away from the second substrate 120 of first substrate 110.However, attachment electrode section 114B is one
It can be in a little embodiments optional.
Referring back to Fig. 2 B, the second antenna oscillator 122 has the institute away from first substrate 110 along the second substrate 120
State the elongated shape that surface extends in a second direction d 2.Second antenna oscillator 122 has the length less than first antenna oscillator 118
The length L2 of L1 is spent, and the length L1 of first antenna oscillator 118 is less than the length L3 of slender electrode part 114A.With continued reference to
Fig. 2 B, the second antenna oscillator 122 be located at the second substrate 120 on the surface of first substrate 110 correspond to first antenna
At the position of oscillator 118, and slender electrode part 114A be located at first substrate 110 on the surface of the second substrate 120
The position corresponding to first antenna oscillator 118 at.
As used in the second antenna oscillator 122 of connection, first antenna oscillator 118 and slender electrode part 114A herein
Term " corresponding to " refers to the second antenna oscillator 122, first antenna oscillator 118 and slender electrode part 114A by relative to each other
Positioning is so that they form three cell orientation radiators, wherein the second antenna oscillator 122 serves as director, first antenna oscillator
118 serve as active dipole, and slender electrode part 114A serves as reflector.Specifically, reflector is positioned in active dipole
Side with weaken the electromagnetic wave transmitted from this side or to this side emit electromagnetic wave, and director be located in it is active
The other side of oscillator is to enhance electromagnetic wave that is transmitting from this side direction or launching to this direction.Such directionality
Radiator is operated in a manner of being similar to yagi aerial, therefore detailed description is omitted herein.
In the example of Fig. 2 B, first antenna oscillator 118 is positioned in the surface of slender electrode part 114A, and
Two antenna oscillators 122 are positioned in the surface of first antenna oscillator 118.More specifically, the second antenna oscillator 122, first days
Linear oscillator 118 and slender electrode part 114A are arranged such that the center of the second antenna oscillator 122, in first antenna oscillator 118
Gap 119 center and slender electrode part 114A center in the side perpendicular to first substrate 110 and the second substrate 120
It is overlapped upwards, as indicated by dotted line OO '.
Depending on the wavelength of electromagnetic wave, the second antenna oscillator 122, first antenna oscillator 118 and slender electrode part 114A
It is suitably arranged.For example, first antenna oscillator 118 have suitable length, such as electromagnetic wave wavelength half.?
In some embodiments, the length L2 of the second antenna oscillator 122 is 0.7-0.9 times of the length L1 of first antenna oscillator 118.?
In the embodiment made of identical material, it is first substrate 110 that the second substrate 120, which has, for one substrate 110 and the second substrate 120
Thickness H1 3-5 times of thickness H2.In the embodiment that first substrate 110 and the second substrate 120 are made from a variety of materials,
The thickness H1 of first substrate 110 and the thickness H2 of the second substrate 120 meet following relationship:
,
Wherein ε1For the dielectric constant of first substrate 110, and ε2For the dielectric constant of the second substrate 120.
In some embodiments, the second substrate 120 can be include multilayer material composite plate to provide suitable dielectric
Constant.For example, the outermost layer of the second substrate 120 can be formed even by air.That is, the second antenna oscillator 122 is not
Directly in the second substrate 120 on the surface of first substrate 110, but it is positioned in 120 one spacing of top of the second substrate
From place.In this case, the second antenna oscillator 122 can be consolidated by means of any supporting method (such as column) appropriate
It is fixed.
Although it will be appreciated that describing the second antenna oscillator 122, first antenna oscillator 118 above with regard to Fig. 1 and 2 B
With the exemplary arrangement of slender electrode part 114A, but other embodiments are possible.For example, first antenna oscillator 118 can be with
It is shifted by certain distance in the first direction dl relative to slender electrode part 114A, and the second antenna oscillator 122 can phase
Certain distance is further deviated in the first direction dl for first antenna oscillator 118.Alternatively or additionally, first antenna
Oscillator 118 can be shifted by certain distance and/or the vibration of the second antenna in a second direction d 2 relative to slender electrode part 114A
Son 122 can be shifted by certain distance relative to first antenna oscillator 118 in a second direction d 2.In practice, the second antenna
Oscillator 122, first antenna oscillator 118 and slender electrode part 114A can be arranged in any suitable manner, as long as they
It is capable of forming three cell orientation radiators.
By means of the directionality formed by the second antenna oscillator 122, first antenna oscillator 118 and slender electrode part 114A
Radiator, liquid crystal antenna element 100, which is expected, realizes higher amplitude gain.
Fig. 5 shows the two-dimentional far field directional pattern of liquid crystal antenna element 100.Directionality figure is from the imitative of software realization
Obtained in true, wherein the frequency of electromagnetic wave is to be set as 30 GHz.According to simulation result, on 0 degree of main lobe direction, main lobe
Amplitude gain is 8.89 dBi.This gain than conventional paster antenna is higher by 2-3 dB.Therefore, liquid crystal antenna element 100 has
The raising of gain is realized sharply.
Fig. 6 A and 6B schematically illustrate the section of the liquid crystal antenna element 200 according to another embodiment of the utility model
Figure.
Similar to Fig. 2A, Fig. 6 A shows the exemplary arrangement of the electrode 125 of transmission line 112 and electrode structure 124.With liquid crystal
Antenna element 100 is different, in liquid crystal antenna element 200, first surface S1 be defined as the second substrate 120 towards the first base
The surface of plate 110, and second surface S2 is defined as the surface towards the second substrate 120 of first substrate 110.Therefore, exist
In the embodiment, transmission line 112 is located on the surface towards first substrate 110 of the second substrate 120, and electrode pattern 124
Electrode 125 be located on the surface towards the second substrate 120 of first substrate 110.
Similar to Fig. 2 B, Fig. 6 B shows the second antenna oscillator 122, first antenna oscillator 118 and slender electrode part
The exemplary arrangement of 114A.Different from liquid crystal antenna element 100, in liquid crystal antenna element 200, first antenna oscillator 118 is located at
On the surface towards first substrate 110 of the second substrate 120.
It, can also be with above for Fig. 1-5 100 details of liquid crystal antenna element described and modification in addition to difference described herein
Suitable for liquid crystal antenna element 200, and therefore it is not repeated herein.
Fig. 7 schematically illustrates the block diagram of the LCD phased array antenna 700 according to the utility model embodiment.
With reference to Fig. 7, LCD phased array antenna 700 includes the multiple liquid crystal antenna elements 710 being arranged in an array.Liquid crystal
Each of antenna element 710 can take liquid crystal antenna element 100 or liquid crystal antenna element 200 described above or its change
Therefore the form of type, detailed description are omitted herein.Multiple liquid crystal antenna elements 710 can pass through feeding network (not shown)
It is applied different modulation voltages, to change the phase of electromagnetic wave signal, to realize the function of beam scanning and wave beam forming
Energy.Advantageously, liquid crystal antenna element 710 can provide gain more higher than the patch antenna element of routine.
In some embodiments, each first substrate of multiple liquid crystal antenna elements 710 is formed by single substrate as a whole,
And each the second substrate of multiple liquid crystal antenna elements 710 is formed by another single substrate as a whole.This is conducive to liquid crystalline phase
Control the batch production of array antenna.Alternatively, LCD phased array antenna 700 can also be by combining isolated liquid crystal antenna element
710 and formed.
LCD phased array antenna 700, which is expected, provides higher gain, because of each antenna element 710 as described above
Higher gain can be provided.In the identical situation of antenna array size, LCD phased array antenna 700 can be provided than routine
The higher gain of LCD phased array antenna.Which improve communication performances.
LCD phased array antenna 700 is also expected to have smaller size, because each antenna element 710 can be produced
Identical gain is still provided to be smaller than conventional patch antenna element.In the same number of situation of the antenna element of array
Under, LCD phased array antenna 700 can have 1/2 size of the about size of custom liquid crystals phased array antenna.Which save
Antenna arrangement space.
By research attached drawing, disclosure and appended claims, those skilled in the art are in the required guarantor of practice
When the theme of shield, it is to be understood that and realize the modification for the disclosed embodiments.In detail in the claims, word " comprising " is not
Exclude other elements or step, and indefinite article "a" or "an" be not excluded for it is multiple.It is wanted in mutually different appurtenance
The only fact that certain measures are described in asking does not indicate that the combination of these measures cannot be used to make a profit.
Claims (15)
1. a kind of liquid crystal antenna element, comprising:
First substrate；
The second substrate is oppositely arranged with the first substrate；
Liquid crystal layer, setting is between the first substrate and the second substrate；
Transmission line on first surface and is arranged to and extends in a first direction along the first surface, and described first
Surface be selected from the first substrate surface towards the second substrate and the second substrate towards the first substrate
Surface composed by group；
First antenna oscillator is located on the first surface, and is arranged to along the first surface in a second direction
The elongated dipole extended, the dipole include two extremely sub, the first antenna oscillator quilts opened by a gapping interval
It is configured in the gap in described two coupled electromagnetic waves extremely between son and the transmission lines；
Second antenna oscillator, positioned at the corresponding to described first day on the surface of the first substrate of the second substrate
At the position of linear oscillator, second antenna oscillator has the table away from the first substrate along the second substrate
The elongated shape that face extends in this second direction, second antenna oscillator also have less than the first antenna oscillator
The length of length；And
Grounding electrode, positioned at the first substrate on the surface of the second substrate, the grounding electrode includes being located at
Corresponding to the slender electrode part at the position of the first antenna oscillator, the slender electrode part is along the first substrate
The surface away from the second substrate extend in this second direction, the slender electrode part have be greater than it is described
The length of the length of first antenna oscillator.
2. liquid crystal antenna element as described in claim 1, wherein the length of second antenna oscillator is the first antenna
0.7-0.9 times of the length of oscillator.
3. liquid crystal antenna element as described in claim 1, wherein the first substrate and the second substrate are by identical material
Material is made, and wherein the second substrate has 3-5 times of thickness of the thickness for first substrate.
4. liquid crystal antenna element as described in claim 1, wherein the first substrate and the second substrate are by different materials
Material is made, and wherein the thickness of the first substrate and the thickness of the second substrate meet following relationship:
,
Wherein H1 is the thickness of the first substrate, and H2 is the thickness of the second substrate, ε1Dielectric for the first substrate is normal
Number, and ε2For the dielectric constant of the second substrate.
5. liquid crystal antenna element as described in claim 1, wherein the second substrate is the composite plate for including multilayer material.
6. liquid crystal antenna element as described in claim 1, wherein second antenna oscillator, the first antenna oscillator and institute
It states slender electrode part and is arranged such that the center of second antenna oscillator, the gap in the first antenna oscillator
The center of center and the slender electrode part is overlapped on perpendicular to the direction of the first substrate and the second substrate.
7. liquid crystal antenna element as described in claim 1, wherein the first direction is perpendicular to the second direction.
8. liquid crystal antenna element as described in claim 1, wherein the transmission line includes coplanar waveguide transmission line, the coplanar wave
Leading transmission line includes signal wire and two ground wires for being located at the signal wire two sides.
9. liquid crystal antenna element as claimed in claim 8, wherein one end of the signal wire is electrically connected to the dipole
Two extremely son in one close to the gap one end, and wherein in two ground wires one one end electrical connection
To another one end close to the gap in two of the dipole extremely son.
10. liquid crystal antenna element as claimed in claim 8, wherein the first surface is the first substrate towards described
The surface of the second substrate, and wherein the liquid crystal antenna element further includes the electrode structure on the second surface, described the
Two surfaces are the surface towards the first substrate of the second substrate.
11. liquid crystal antenna element as claimed in claim 8, wherein the first surface is the second substrate towards described
The surface of first substrate, and wherein the liquid crystal antenna element further includes the electrode structure on the second surface, described the
Two surfaces are the surface towards the second substrate of the first substrate.
12. liquid crystal antenna element as described in claim 10 or 11, wherein the electrode structure include be parallel to each other and along
The multiple electrodes that the second surface is upwardly extended in the side perpendicular to the first direction.
13. liquid crystal antenna element as described in claim 1, wherein the grounding electrode further includes along the first substrate
Extend in the direction perpendicular to the second direction from the slender electrode part away from the surface of the second substrate
Additional electrode part.
14. a kind of LCD phased array antenna, including being arranged in an array multiple as described in any one of claim 1-13
Liquid crystal antenna element.
15. LCD phased array antenna as claimed in claim 14, wherein each first substrate of the multiple liquid crystal antenna element
Formed as a whole by single substrate, and wherein each the second substrate of the multiple liquid crystal antenna element as a whole by another
Single substrate is formed.
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