CN208654481U - Liquid crystal phase shifter and liquid crystal antenna - Google Patents
Liquid crystal phase shifter and liquid crystal antenna Download PDFInfo
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- CN208654481U CN208654481U CN201821295601.XU CN201821295601U CN208654481U CN 208654481 U CN208654481 U CN 208654481U CN 201821295601 U CN201821295601 U CN 201821295601U CN 208654481 U CN208654481 U CN 208654481U
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Abstract
The utility model provides a kind of liquid crystal phase shifter and liquid crystal antenna, belongs to field of communication technology.The liquid crystal phase shifter of the utility model, comprising: the microwave transmission structure and phase adjusting structure being oppositely arranged, and the liquid crystal layer between the microwave transmission structure and the phase adjusting structure；Wherein, the phase adjusting structure includes multiple phasing units；The phasing unit, for changing the dielectric constant of liquid crystal layer, adjusting the phase of microwave signal according to the voltage applied in voltage and the microwave transmission structure is applied thereon；The phase-shift phase of each corresponding adjustment of the phasing unit is different.
Description
Technical field
The utility model belongs to field of communication technology, and in particular to a kind of liquid crystal phase shifter and liquid crystal antenna.
Background technique
Phase shifter is the device for changing electromagnetic wave signal phase.Ideal phase shifter has the insertion loss of very little, and
And have almost the same loss in different phase states, to reach the balance of amplitude.Phase shifter has automatically controlled, light-operated, magnetic control, machine
The several types such as tool control.The basic function of phase shifter is to be changed the transmission phase of microwave signal by means of control bias.Point
For digital and analog (phase-shift phase is continuously adjustable), digital phase shifter is important component in phased array antenna, for controlling
The phase of the road antenna array Zhong Ge signal can make radiation beam carry out electric scanning；It is also commonly used in digital communication system, as phase
Modulator.A kind of novel numerical shift device is provided in the present invention.
Utility model content
The utility model aims to solve at least one of the technical problems existing in the prior art, and providing one kind may be implemented phase
The liquid crystal phase shifter and liquid crystal antenna of shifting amount independent control.
Solving technical solution used by the utility model technical problem is a kind of liquid crystal phase shifter, comprising: is oppositely arranged
Microwave transmission structure and phase adjusting structure, and between the microwave transmission structure and the phase adjusting structure
Liquid crystal layer；Wherein, the phase adjusting structure includes multiple phasing units；The phasing unit, for according to it
It is upper to apply the voltage applied in voltage and the microwave transmission structure, change the dielectric constant of liquid crystal layer, adjusts microwave signal
Phase；The phase-shift phase of each corresponding adjustment of the phasing unit is different.
Preferably, the microwave transmission structure includes:
First substrate；
Microstrip line, positioned at first substrate on the side of the liquid crystal layer；
Ground electrode, positioned at first substrate on the side of the liquid crystal layer；Wherein, the phasing unit,
For changing the dielectric constant of the liquid crystal layer according to the voltage applied on voltage and the microstrip line is applied thereon, adjust micro-
The phase of wave signal.
It may further be preferable that the phase adjusting structure includes:
Second substrate；
Second substrate is arranged on the side of the liquid crystal layer in the phasing unit；Wherein,
The phasing unit includes that multiple electricity in the first side of second substrate, arranged side by side are arranged in
Pole item, and the electrode strip and orthographic projection of the microstrip line in first substrate are least partially overlapped, and each described
The quantity of electrode strip in phasing unit is different.
It may further be preferable that the extending direction of the electrode strip and the extending direction of the microstrip line are vertically arranged.
Preferably, the microwave transmission structure includes:
First substrate；
Co-planar waveguide layer, positioned at first substrate on the side of the liquid crystal layer.
It may further be preferable that the co-planar waveguide layer includes:
Center band, positioned at first substrate on the side of the liquid crystal layer；
Two counterpoise groundings, are divided into the two sides of the center band；Wherein,
The phasing unit, for changing institute according to the voltage applied on voltage and the center band is applied thereon
The dielectric constant for stating liquid crystal layer adjusts the phase of microwave signal.
It may further be preferable that the phase adjusting structure includes:
Second substrate；
Second substrate is arranged on the side of the liquid crystal layer in the phasing unit；Wherein,
The phasing unit includes that multiple electricity in the first side of second substrate, arranged side by side are arranged in
Pole item, and the electrode strip and orthographic projection of the center band in first substrate are least partially overlapped, and each described
The quantity of electrode strip in phasing unit is different.
It may further be preferable that the extending direction of the electrode strip and the extending direction of the center band are vertically arranged.
Preferably, a plurality of offset line is also set up in the peripheral region of the first side of second substrate, described in each
Offset line connects each electrode strip in the corresponding phasing unit.
Preferably, the spacing between each electrode strip is identical.
Preferably, the material of the electrode strip includes aluminium, silver, gold, chromium, molybdenum, nickel, any one in iron.
Solving technical solution used by the utility model technical problem is a kind of liquid crystal antenna comprising above-mentioned liquid crystal
Phase shifter.
The utility model has the following beneficial effects:
Since in the liquid crystal phase shifter of the utility model, phase adjusting structure includes multiple phasing units, and it is every
After being applied voltage and forming electric field, driving liquid crystal layer deflection changes liquid crystal layer for a phasing unit and microwave transmission structure
Dielectric constant, therefore, thus it is possible to vary the phase of microwave signal, and different phasing units and microwave transmission structure exists
After being applied voltage, the phase-shift phase of corresponding adjustment is then one phase shift of corresponding adjustment of different namely each phasing unit
When measuring, therefore can be adjusted with phase-shift phase, corresponding phasing unit is controlled according to the size for the phase-shift phase to be adjusted and applies voltage,
Without applying voltage to all phasing units, so that the phase shifter in the utility model facilitates control, and function
It consumes smaller.
Detailed description of the invention
Fig. 1 is the sectional view of the liquid crystal phase shifter of the embodiments of the present invention 2；
Fig. 2 is the birds-eye perspective of the liquid crystal phase shifter of the embodiments of the present invention 2；
Fig. 3 is the enlarged drawing of location A in Fig. 2；
Fig. 4 is the sectional view of the liquid crystal phase shifter of the embodiments of the present invention 3；
Fig. 5 is the birds-eye perspective of the liquid crystal phase shifter of the embodiments of the present invention 3；
Fig. 6 is the enlarged drawing of location A in Fig. 5.
Wherein appended drawing reference are as follows: 1, microwave transmission structure；10, the first substrate；11, microstrip line；12, ground electrode；13, center
Band；14, counterpoise grounding；2, phase adjusting structure；20, the second substrate；21, phasing unit；211, electrode strip；22, offset line；
3, liquid crystal layer；31, liquid crystal molecule.
Specific embodiment
It is with reference to the accompanying drawing and specific real to make those skilled in the art more fully understand the technical solution of the utility model
Mode is applied to be described in further detail the utility model.
Unless otherwise defined, technical term or scientific words used in the present embodiment are should be belonging to the utility model
With personage's ordinary meaning to understand of general technical ability in technical field." first ", " second " used in the present embodiment
And similar word is not offered as any sequence, quantity or importance, and be used only to distinguish different component parts.
The similar word such as " comprising " or "comprising", which means to occur element or object before the word, to be covered and appears in behind the word
The element enumerated perhaps object and its equivalent and be not excluded for other elements or object." connection " or " connected " etc. are similar
Word is not limited to physics or mechanical connection, but may include electrical connection, it is either direct or between
It connects."upper", "lower", "left", "right" etc. are only used for indicating relative positional relationship, when the absolute position for being described object changes
Afterwards, then the relative positional relationship may also correspondingly change.
It is appreciated that ought such as layer, film, region or substrate etc element be referred to as be located at another element "above" or "below"
When, which " direct " can be located at "above" or "below" another element, or may exist intermediary element.
Embodiment 1:
The present embodiment provides a kind of numeric type liquid crystal phase shifters, comprising: the microwave transmission structure and phase tune being oppositely arranged
Whole structure, and the liquid crystal layer between microwave transmission structure and the phase adjusting structure；Wherein, phase adjusting structure packet
Include multiple phasing units；Each phasing unit is used to apply in voltage and microwave transmission structure according to thereon applying
Voltage changes the dielectric constant of liquid crystal layer, adjusts the phase of microwave signal；The phase-shift phase of the corresponding adjustment of each phasing unit
It is different.
Wherein, it should be noted that the digit of phase shifter then determines the number of phasing unit, that is, then
The number of phase shifter be N, then determine phasing unit number be it is N number of, can then obtain 2 at this timeNA phase-shift phase (or
Referred to as phase state), it is divided into 360 °/2N。
Since in the liquid crystal phase shifter of the present embodiment, phase adjusting structure includes multiple phasing units, and it is each
After being applied voltage and forming electric field, driving liquid crystal layer deflection changes liquid crystal layer for phasing unit and microwave transmission structure
Dielectric constant, therefore, thus it is possible to vary the phase of microwave signal, and different phasing units and microwave transmission structure is in quilt
After applying voltage, the phase-shift phase of corresponding adjustment is different namely each phasing unit then one phase-shift phase of corresponding adjustment,
Therefore when can be adjusted with phase-shift phase, corresponding phasing unit is controlled according to the size for the phase-shift phase to be adjusted and applies voltage, and
Without applying voltage to all phasing unit so that the phase shifter in the present embodiment facilitates control, and power consumption compared with
It is small.
Embodiment 2:
As shown in Figure 1, the present embodiment provides a kind of numeric type liquid crystal phase shifters, comprising: the microwave transmission knot being oppositely arranged
Structure 1 and phase adjusting structure 2, and the liquid crystal layer 3 between microwave transmission structure 1 and the phase adjusting structure 2；The liquid
Microwave transmission structure 1 in brilliant phase shifter includes: the first substrate 10, and the first substrate 10 is arranged on the side of liquid crystal layer 3
Microstrip line 11, and positioned at the first substrate 10 away from liquid crystal layer 3 side on ground electrode 12；In phase adjusting structure 2
Each phasing unit 21 include multiple electrodes item 211 of second substrate 20 on the side of liquid crystal layer 3 is set, and
The quantity of electrode strip 211 in different phasing units 21 is different.Wherein, microstrip line 11 and each electrode strip 211 are in substrate
On orthographic projection it is least partially overlapped.
Wherein, in this kind of phase shifter microstrip line 11 as the part-structure in microwave transmission structure 1 simultaneously, also conduct
Part-structure in phase adjusting structure 2.That is, microstrip line 11 can be loaded voltage, it can also receive or send out
Send microwave signal.Wherein, especially in embodiment, microwave transmission structure 1 is used as using microstrip line 11 and ground electrode 12, this
When, most of microwave signal will be transmitted in the first substrate 10 between microstrip line 11 and ground electrode 12, and the first base
Bottom 10 generallys use the materials such as glass, ceramics, microwave signal transmit wherein be will not be absorbed, therefore can effectively reduce
The loss of microwave.
Wherein, it controls for convenience, and wiring is simple, each electrode strip 211 in each phasing unit 21 is adopted
It is controlled with same offset line 22.
Wherein, as shown in Figures 2 and 3, by taking six liquid crystal digital type liquid crystal phase shifters as an example, which shares 6 phases
The quantity of adjustment unit 21, the electrode strip 211 in out of phase adjustment unit 21 is different；Each phasing unit 21 passes through inclined
It sets line 22 to be independently controlled it, completes the presentation of 64 phase masses.Such as: 6 phasing units 21 divide from top to bottom
Not for realizing phase-shift phase be 0.9 °, 1.5 °, 3.1 °, 6.1 °, 11.5 °, 23.1 °.
It, only need to be to first phase adjustment list corresponding to the phase-shift phase if realize 0.9 ° of phase-shift phase with microwave signal
22 on-load voltage of offset line that member 21 is connected, so that voltage signal output is given its connection electrode item 211 by offset line 22,
11 on-load voltage of microstrip line is given simultaneously, at this point, generating electric field driven liquid between microstrip line 11 and the electrode strip 211 for being loaded voltage
Brilliant molecule 31 deflects, to change 3 dielectric constant of liquid crystal layer, so that the phase of microwave signal generates 0.9 ° of phase shift.And
If the phase-shift phase that microwave signal is realized is 2.4 °, then need to control first phasing unit 21 and second phase tune
The offset line 22 that whole unit 21 is connected is loaded voltage signal, to control the electrode strip in the two phasing units 21
211 are loaded voltage signal, while giving 11 on-load voltage of microstrip line, at this point, microstrip line 11 and the electrode strip 211 for being loaded voltage
Between generate electric field driven liquid crystal molecule 31 deflect, to change 3 dielectric constant of liquid crystal layer, so that the phase of microwave signal
Generate 2.4 ° of phase shift.Similarly, if realize other phase-shift phases (not including 6 above-mentioned phase-shift phases), needing to control can be with
The phasing unit 21 of the phase-shift phase is realized in combination, is worked according to the method described above, to change the phase of microwave signal.
Wherein, in this kind of phase shifter, all electrode strips 211 are in periodic arrangement in the second substrate 20, specifically, can
To set identical for the spacing between each electrode strip 211.It is of course also possible to which the spacing between each electrode strip 211 is pressed
It arranges according to certain rule.Institute be arranged such be for convenience electrode strip 211 control.
Wherein, the extending direction of electrode strip 211 and the extending direction of microstrip line 11 are vertically arranged.It needs to illustrate herein
It is that the extending direction of electrode strip 211 and the extending direction of microstrip line 11 each mean respective long axis direction.Why it is arranged such
It is, in order to make the overlapping area of each electrode strip 211 and microstrip line 11 sufficiently large, so that in each phasing unit 21
When electrode strip 211 applies voltage, the electric field that can be formed between microstrip line 11 is sufficiently large, to drive liquid crystal molecule 31 to deflect,
Change the dielectric constant of liquid crystal layer 3, to realize phase shift.
Wherein, the first substrate 10 and the second substrate 20 can be using the removing substrates with a thickness of 100-1000 microns, can also
Using Sapphire Substrate, the polyethylene terephthalate substrate with a thickness of 10-500 microns, cyanuric acid three can also be used
Allyl ester substrate and polyimide transparent flexible base board.Specifically, the first substrate 10 and the second substrate 20 can be damaged using dielectric
Consume extremely low high-purity quartz glass.Compared to common glass substrates, the first substrate 10 and the second substrate 20 use quartz glass
The loss to microwave can be effectively reduced, makes phase shifter that there is low power consumption and high signal-to-noise ratio.
Wherein, microstrip line 11, ground electrode 12, electrode strip 211 material can use aluminium, silver, gold, chromium, molybdenum, nickel or iron
Equal metals are made.And microstrip line 11 can also be used and is made of transparent conductive oxide.
Wherein, the liquid crystal molecule 31 in liquid crystal layer 3 is positive liquid crystal molecules or negative liquid crystal molecule, it should be noted that
When liquid crystal molecule 31 is positive liquid crystal molecules, 31 long axis direction of the utility model specific embodiment liquid crystal molecule and second electrode
Between angle be greater than 0 degree less than or equal to 45 degree.When liquid crystal molecule 31 is negative sense liquid crystal molecule, the utility model specific implementation
Angle between example 31 long axis direction of liquid crystal molecule and second electrode is greater than 45 degree less than 90 degree, ensure that liquid crystal molecule 31 occurs
After deflection, change the dielectric constant of liquid crystal layer 3, to achieve the purpose that phase shift.
Since in the liquid crystal phase shifter of the present embodiment, phase adjusting structure 2 includes multiple phasing units 21, and every
After being applied voltage and forming electric field, driving liquid crystal layer 3 is deflected for a phasing unit 21 and microstrip line 11, changes liquid crystal layer 3
Dielectric constant, therefore, thus it is possible to vary the phase of microwave signal, and 211 He of electrode strip in different phasing units 21
For microstrip line 11 after being applied voltage, the phase-shift phase of corresponding adjustment is that different namely each phasing unit 21 then corresponds to
When adjusting a phase-shift phase, therefore can adjust with phase-shift phase, corresponding phase adjustment is controlled according to the size for the phase-shift phase to be adjusted
Unit 21 applies voltage, without applying voltage to all phasing units 21, so that the phase shift in the present embodiment
Device facilitates control, and power consumption is smaller.And microwave transmission structure 1 is used as using microstrip line 11 and ground electrode 12, at this point, most of
Microwave signal will be transmitted in the first substrate 10 between microstrip line 11 and ground electrode 12, and the first substrate 10 is usually adopted
With materials such as glass, ceramics, microwave signal transmit wherein be will not be absorbed, therefore the damage of microwave can be effectively reduced
Consumption.
Embodiment 3:
As shown in figure 4, the present embodiment provides a kind of numeric type liquid crystal phase shifters, comprising: the microwave transmission knot being oppositely arranged
Structure 1 and phase adjusting structure 2, and the liquid crystal layer 3 between microwave transmission structure 1 and the phase adjusting structure 2；This kind
Microwave transmission structure 1 in phase shifter includes: the first substrate 10, and positioned at the first substrate 10 on the side of liquid crystal layer 3
Co-planar waveguide layer；Wherein, which specifically includes: center band 13, is located in the first substrate 10；Two counterpoise groundings
14, it is divided into the two sides of the center band 13.Phase adjusting structure 2 includes: the second substrate 20, and leans on positioned at the second substrate 20
Multiple phasing units 21 on nearly liquid crystal layer 3；Wherein, each phasing unit 21 includes: to be arranged in second substrate
Multiple electrodes item 211 in 20 first side, arranged side by side, and electrode strip 211 and center band 13 are in first substrate
Orthographic projection on 10 is least partially overlapped, and the quantity of the electrode strip 211 in each phasing unit 21 is different.
Wherein, it is limited between the center band 13 and counterpoise grounding 14 of co-planar waveguide layer in microwave signal in this kind of phase shifter
Area transmissions, and when co-planar waveguide layer is applied in phase shifter, the thickness of liquid crystal layer 3 can design it is more relatively thin,
Substantially at 4-5 μm, therefore microwave signal can be transmitted in liquid crystal layer 3, but the loss of microwave signal is also relatively small number of.
Wherein, it controls for convenience, and wiring is simple, each electrode strip 211 in each phasing unit 21 is adopted
It is controlled with same offset line 22.
Wherein, as it can be seen in figures 5 and 6, the phase shifter shares 6 phases by taking six liquid crystal digital type liquid crystal phase shifters as an example
The quantity of adjustment unit 21, the electrode strip 211 in out of phase adjustment unit 21 is different；Each phasing unit 21 passes through inclined
It sets line 22 to be independently controlled it, completes the presentation of 64 phase masses.Such as: 6 phasing units 21 divide from top to bottom
Not for realizing phase-shift phase be 0.9 °, 1.5 °, 3.1 °, 6.1 °, 11.5 °, 23.1 °.
It, only need to be to first phase adjustment list corresponding to the phase-shift phase if realize 0.9 ° of phase-shift phase with microwave signal
22 on-load voltage of offset line that member 21 is connected, so that voltage signal output is given its connection electrode item 211 by offset line 22,
13 on-load voltage of center band is given simultaneously, at this point, generating electric field driven liquid between center band 13 and the electrode strip 211 for being loaded voltage
Brilliant molecule 31 deflects, to change 3 dielectric constant of liquid crystal layer, so that the phase of microwave signal generates 0.9 ° of phase shift.And
If the phase-shift phase that microwave signal is realized is 2.4 °, then need to control first phasing unit 21 and second phase tune
The offset line 22 that whole unit 21 is connected is loaded voltage signal, to control the electrode strip in the two phasing units 21
211 are loaded voltage signal, while giving 13 on-load voltage of center band, at this point, center band 13 and the electrode strip 211 for being loaded voltage
Between generate electric field driven liquid crystal molecule 31 deflect, to change 3 dielectric constant of liquid crystal layer, so that the phase of microwave signal
Generate 2.4 ° of phase shift.Similarly, if realize other phase-shift phases (not including 6 above-mentioned phase-shift phases), needing to control can be with
The phasing unit 21 of the phase-shift phase is realized in combination, is worked according to the method described above, to change the phase of microwave signal.
Wherein, in this kind of phase shifter, all electrode strips 211 are in periodic arrangement in the second substrate, specifically, can be with
Set identical for the spacing between each electrode strip 211.It is of course also possible to spacing between each electrode strip 211 according to
Certain rule is arranged.Institute be arranged such be for convenience electrode strip 211 control.
Wherein, the extending direction of electrode strip 211 and the extending direction of center band 13 are vertically arranged.It needs to illustrate herein
It is that the extending direction of electrode strip 211 and the extending direction of center band 13 each mean respective long axis direction.Why it is arranged such
It is, in order to make the overlapping area of each electrode strip 211 and center band 13 sufficiently large, so that in each phasing unit 21
When electrode strip 211 applies voltage, the electric field that can be formed between center band 13 is sufficiently large, to drive liquid crystal molecule 31 to deflect,
Change the dielectric constant of liquid crystal layer 3, to realize phase shift.
Wherein, the first substrate 10 and the second substrate 20 can be using the removing substrates with a thickness of 100-1000 microns, can also
Using Sapphire Substrate, the polyethylene terephthalate substrate with a thickness of 10-500 microns, cyanuric acid three can also be used
Allyl ester substrate and polyimide transparent flexible base board.Specifically, the first substrate 10 and the second substrate 20 can be damaged using dielectric
Consume extremely low high-purity quartz glass.Compared to common glass substrates, the first substrate 10 and the second substrate 20 use quartz glass
The loss to microwave can be effectively reduced, makes phase shifter that there is low power consumption and high signal-to-noise ratio.
Wherein, the material of center band 13, counterpoise grounding 14 and electrode strip 211 can use aluminium, silver, gold, chromium, molybdenum, nickel
Or the metals such as iron are made.
Wherein, the liquid crystal molecule 31 in liquid crystal layer 3 is positive liquid crystal molecules or negative liquid crystal molecule, it should be noted that
When liquid crystal molecule 31 is positive liquid crystal molecules, 31 long axis direction of the utility model specific embodiment liquid crystal molecule and second electrode
Between angle be greater than 0 degree less than or equal to 45 degree.When liquid crystal molecule 31 is negative sense liquid crystal molecule 31, the utility model is specifically real
It applies the angle between 31 long axis direction of a liquid crystal molecule and second electrode and is greater than 45 degree less than 90 degree, ensure that liquid crystal molecule 31 is sent out
After raw deflection, change the dielectric constant of liquid crystal layer 3, to achieve the purpose that phase shift.
Since in the liquid crystal phase shifter of the present embodiment, phase adjusting structure 2 includes multiple phasing units 21, and every
After being applied voltage and forming electric field, driving liquid crystal layer 3 is deflected for a phasing unit 21 and center band 13, changes liquid crystal layer 3
Dielectric constant, therefore, thus it is possible to vary the phase of microwave signal, and 211 He of electrode strip in different phasing units 21
For center band 13 after being applied voltage, the phase-shift phase of corresponding adjustment is that different namely each phasing unit 21 then corresponds to
When adjusting a phase-shift phase, therefore can adjust with phase-shift phase, corresponding phase adjustment is controlled according to the size for the phase-shift phase to be adjusted
Unit 21 applies voltage, without applying voltage to all phasing units 21, so that the phase shift in the present embodiment
Device facilitates control, and power consumption is smaller.
Embodiment 4:
The present embodiment provides a kind of liquid crystal antenna, which includes any one liquid crystal phase shift in embodiment 1-3
Device.Wherein, at least two chip units are additionally provided in the side away from liquid crystal layer of the second substrate, wherein every two patch
The gap between gap and electrode strip between unit is correspondingly arranged.So, can make by the phase shift in embodiment 1
Microwave signal after device progress phase adjustment is radiate from the gap between chip unit.
It certainly, further include feeding interface in liquid crystal antenna, for the microwave signal in cable to be fed into microwave transmission
In structure, such as: on microstrip line.
By any one liquid crystal phase shifter that liquid crystal antenna in this present embodiment includes in embodiment 1-3, phase therein
Position adjustment structure includes multiple phasing units, and each phasing unit and microwave transmission structure are being applied voltage shape
After electric field, driving liquid crystal layer deflection changes the dielectric constant of liquid crystal layer, therefore, thus it is possible to vary the phase of microwave signal, and
After being applied voltage, the phase-shift phase of corresponding adjustment is different, namely every for different phasing units and microwave transmission structure
One phasing unit then one phase-shift phase of corresponding adjustment, therefore when can be adjusted with phase-shift phase, according to the phase-shift phase to be adjusted
Size controls corresponding phasing unit and applies voltage, without applying voltage to all phasing units, to make
The phase shifter obtained in the present embodiment facilitates control, and power consumption is smaller.
It is understood that embodiment of above is merely to illustrate that the principles of the present invention and uses exemplary
Embodiment, however the utility model is not limited thereto.For those skilled in the art, this is not being departed from
In the case where the spirit and essence of utility model, various changes and modifications can be made therein, these variations and modifications are also considered as this reality
With novel protection scope.
Claims (12)
1. a kind of liquid crystal phase shifter characterized by comprising the microwave transmission structure and phase adjusting structure being oppositely arranged, with
And the liquid crystal layer between the microwave transmission structure and the phase adjusting structure；Wherein, the phase adjusting structure packet
Include multiple phasing units；The phasing unit, for according to application voltage and the microwave transmission structure thereon
The voltage of application changes the dielectric constant of the liquid crystal layer, adjusts the phase of microwave signal；Each phasing unit pair
The phase-shift phase that should be adjusted is different.
2. liquid crystal phase shifter according to claim 1, which is characterized in that the microwave transmission structure includes:
First substrate；
Microstrip line, positioned at first substrate on the side of the liquid crystal layer；
Ground electrode, positioned at first substrate on the side of the liquid crystal layer；Wherein,
The phasing unit, for changing the liquid according to the voltage applied on voltage and the microstrip line is applied thereon
The dielectric constant of crystal layer adjusts the phase of microwave signal.
3. liquid crystal phase shifter according to claim 2, which is characterized in that the phase adjusting structure includes:
Second substrate；
Second substrate is arranged on the side of the liquid crystal layer in the phasing unit；Wherein,
The phasing unit includes that multiple electrodes in the first side of second substrate, arranged side by side are arranged in
Item, and the electrode strip and orthographic projection of the microstrip line in first substrate are least partially overlapped, and each phase
The quantity of electrode strip in the adjustment unit of position is different.
4. liquid crystal phase shifter according to claim 3, which is characterized in that the extending direction of the electrode strip and the micro-strip
The extending direction of line is vertically arranged.
5. liquid crystal phase shifter according to claim 1, which is characterized in that the microwave transmission structure includes:
First substrate；
Co-planar waveguide layer, positioned at first substrate on the side of the liquid crystal layer.
6. liquid crystal phase shifter according to claim 5, which is characterized in that the co-planar waveguide layer includes:
Center band, positioned at first substrate on the side of the liquid crystal layer；
Two counterpoise groundings, are divided into the two sides of the center band；Wherein,
The phasing unit, for changing the liquid according to the voltage applied on voltage and the center band is applied thereon
The dielectric constant of crystal layer adjusts the phase of microwave signal.
7. liquid crystal phase shifter according to claim 6, which is characterized in that the phase adjusting structure includes:
Second substrate；
Second substrate is arranged on the side of the liquid crystal layer in the phasing unit；Wherein,
The phasing unit includes that multiple electrodes in the first side of second substrate, arranged side by side are arranged in
Item, and the electrode strip and orthographic projection of the center band in first substrate are least partially overlapped, and each phase
The quantity of electrode strip in the adjustment unit of position is different.
8. liquid crystal phase shifter according to claim 7, which is characterized in that the extending direction of the electrode strip and the center
The extending direction of band is vertically arranged.
9. liquid crystal phase shifter according to claim 3 or 7, which is characterized in that in the first side of second substrate
Peripheral region also sets up a plurality of offset line, and offset line described in each connects each electricity in the corresponding phasing unit
Pole item.
10. the liquid crystal phase shifter according to any one of claim 3,4,7,8, which is characterized in that each electrode strip
Between spacing it is identical.
11. the liquid crystal phase shifter according to any one of claim 3,4,7,8, which is characterized in that the material of the electrode strip
Material includes any one in aluminium, silver, gold, chromium, molybdenum, nickel, iron.
12. a kind of liquid crystal antenna, which is characterized in that including liquid crystal phase shifter of any of claims 1-11.
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| CN110707397A (en) * | 2019-10-17 | 2020-01-17 | 京东方科技集团股份有限公司 | Liquid crystal phase shifter and antenna |
| WO2020030046A1 (en) * | 2018-08-10 | 2020-02-13 | 京东方科技集团股份有限公司 | Liquid crystal phase shifter and operation method therefor, liquid crystal antenna, and communication device |
| CN111342173A (en) * | 2020-03-09 | 2020-06-26 | 京东方科技集团股份有限公司 | Liquid crystal phase shifter, antenna and manufacturing method of liquid crystal phase shifter |
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