CN108232383A - High-pass filter, liquid crystal antenna element and LCD phased array antenna - Google Patents
High-pass filter, liquid crystal antenna element and LCD phased array antenna Download PDFInfo
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- CN108232383A CN108232383A CN201810005282.2A CN201810005282A CN108232383A CN 108232383 A CN108232383 A CN 108232383A CN 201810005282 A CN201810005282 A CN 201810005282A CN 108232383 A CN108232383 A CN 108232383A
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- transmission line
- liquid crystal
- transition region
- width
- pass filter
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 46
- 230000005540 biological transmission Effects 0.000 claims abstract description 121
- 230000007704 transition Effects 0.000 claims abstract description 55
- 239000000758 substrate Substances 0.000 claims description 27
- 238000013461 design Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/065—Patch antenna array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The disclosure provides a kind of high-pass filter, liquid crystal antenna element and LCD phased array antenna, is related to antenna technical field.The high-pass filter includes the transmission line between input terminal and output terminal, and the transmission line includes transmission line ontology and the transmission line transition region being connected with transmission line ontology;Wherein, along the transmission direction of transmission line ontology, the width of transmission line transition region has exponent relation variation relative to the width of transmission line ontology.The disclosure can reduce standing-wave ratio, so as to improve the performance of entire antenna system.
Description
Technical field
This disclosure relates to a kind of antenna technical field more particularly to high-pass filter, liquid crystal antenna element and liquid crystalline phase
Control array antenna.
Background technology
The application range of liquid crystal aerial array is very extensive, either the communication between the vehicles and satellite or nothing
People is driven with array radar or active security protection array radar etc., can reach scanning work(using the variable capacitance of liquid crystal
Energy.Wherein, the control signal of liquid crystal is mostly using low frequency (being less than 1kHz) signal, and the radiation signal of antenna is then K band
The signal of (24.150GHz+/- 100MHz) or higher frequency, two kinds of frequencies can be conveyed in transmission line.But due to
The low frequency signal of aerial array each unit is different, can be if cannot filter out low frequency signal in position
It leads to the problem of and interferes with each other between different units.
Fig. 1 show the structure diagram of the high-pass filter used in available liquid crystal phased array antenna.It can according to Fig. 1
Know, existing high-pass filter is substantially exactly the capacitor 102 that the transmission line 101 disconnected is formed, and is existed using condensance
High characteristic obstructs the low frequency signal close to direct current during low during high frequency, low frequency.The design letter of this condenser type high-pass filter
It is single, but a discontinuous impedance has been manufactured in transmission line, a large amount of back wave can be generated in this way, so as to form high standing wave
Than influencing signal quality.
It should be noted that information is only used for strengthening the reason to the background of the disclosure disclosed in above-mentioned background technology part
Solution, therefore can include not forming the information to the prior art known to persons of ordinary skill in the art.
Invention content
The disclosure is designed to provide a kind of high-pass filter, liquid crystal antenna element and LCD phased array antenna, into
And one or more is overcome the problems, such as caused by the limitation of the relevant technologies and defect at least to a certain extent.
Other characteristics and advantages of the disclosure will be by the following detailed description apparent from or partially by the disclosure
Practice and acquistion.
According to one aspect of the disclosure, a kind of high-pass filter is provided, including being located between input terminal and output terminal
Transmission line, the transmission line include transmission line ontology and the transmission line transition region being connected with the transmission line ontology;
Wherein, along the transmission direction of the transmission line ontology, the width of the transmission line transition region is relative to the transmission
The width of line ontology has exponent relation variation.
In a kind of exemplary embodiment of the disclosure, the width of the transmission line transition region is relative to the transmission line ontology
Width be in e±qzExponential relationship changes;
Wherein, q is variation coefficient and 1 × 10-3<q<100, z for transmission line transition region in the transmit direction relative to transmission
The distance of line ontology.
In a kind of exemplary embodiment of the disclosure, the transmission line transition region include respectively with the transmission line of both sides
The first side and the second side that ontology is connected;
First side width of the transmission line transition region is in e relative to the width of transmission line ontology described in first sideqzRefer to
Count relationship change or in e-qzExponential relationship changes, q=q1;
The second side width of the transmission line transition region is in e relative to the width of transmission line ontology described in the second sideqzRefer to
Count relationship change or in e-qzExponential relationship changes, q=q2;
Wherein, q1=q2Or q1≠q2。
In a kind of exemplary embodiment of the disclosure, the variation relation of transmission line transition region both sides is identical.
In a kind of exemplary embodiment of the disclosure, the variation relation of transmission line transition region both sides is opposite.
According to one aspect of the disclosure, a kind of liquid crystal antenna element is provided, including the first substrate set to box and
Two substrates, the liquid crystal layer between the first substrate and the second substrate deviate from the liquid positioned at the first substrate
The chip unit of crystal layer side, positioned at the first substrate towards the earth plate of the liquid crystal layer side and positioned at described
Grounding electrode on two substrates;
Wherein, the chip unit includes above-mentioned high-pass filter.
In a kind of exemplary embodiment of the disclosure, the liquid crystal antenna element further include positioned at the first substrate towards
The first alignment layer of the liquid crystal layer side and positioned at the second substrate towards the second orientation of the liquid crystal layer side
Layer.
According to one aspect of the disclosure, a kind of LCD phased array antenna is provided, including above-mentioned liquid crystal antenna element.
In a kind of exemplary embodiment of the disclosure, the LCD phased array antenna is radial pattern phased array antenna.
In a kind of exemplary embodiment of the disclosure, the LCD phased array antenna is reflection-type phased array antenna.
High-pass filter, liquid crystal antenna element and the LCD phased array day that disclosure illustrative embodiments are provided
Line substitutes traditional discontinuous transmission line with the transmission line of width gradual change, can by the width of reasonable controlling transmission line transition region
The rate of decay of low frequency signal is made to be significantly faster than the rate of decay of high-frequency signal, so as to fulfill its filter function.Compared to tradition
Condenser type high-pass filter, the transmission line width of gradual change can significantly inhibit the formation of back wave, be stayed so as to substantially reduce
Bobbi, this is beneficial to the performance for improving the entire antenna system using the high-pass filter.
It should be understood that above general description and following detailed description are only exemplary and explanatory, not
The disclosure can be limited.
Description of the drawings
Attached drawing herein is incorporated into specification and forms the part of this specification, shows the implementation for meeting the disclosure
Example, and for explaining the principle of the disclosure together with specification.It should be evident that the accompanying drawings in the following description is only the disclosure
Some embodiments, for those of ordinary skill in the art, without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 schematically shows the schematic diagram of condenser type high-pass filter in the prior art;
Fig. 2 schematically shows the schematic diagram one of high-pass filter in disclosure exemplary embodiment;
Fig. 3 schematically shows the schematic diagram two of high-pass filter in disclosure exemplary embodiment;
Fig. 4 schematically shows the schematic cross-section of liquid crystal antenna element in disclosure exemplary embodiment;
Fig. 5 schematically shows the positive structure schematic of LCD phased array antenna in disclosure exemplary embodiment;
Fig. 6 schematically shows the structure schematic diagram of LCD phased array antenna in disclosure exemplary embodiment;
Fig. 7 schematically shows the schematic diagram of radial pattern phased array antenna in disclosure exemplary embodiment.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be real in a variety of forms
It applies, and is not understood as limited to example set forth herein;On the contrary, these embodiments are provided so that the disclosure will more comprehensively and
Completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Described feature, structure or characteristic
It can in any suitable manner be incorporated in one or more embodiments.In the following description, many details are provided
Embodiment of the disclosure is fully understood so as to provide.It will be appreciated, however, by one skilled in the art that the disclosure can be put into practice
Technical solution and omit one or more in the specific detail or may be used other methods, constituent element, device,
Step etc..In other cases, known solution is not shown in detail or describes to avoid all aspects of this disclosure is made to become mould
Paste.
In addition, attached drawing is only the schematic illustrations of the disclosure, it is not necessarily drawn to scale.The thickness of each layer in attached drawing
Do not reflect actual proportions with shape, be merely for convenience and purposes of illustration content of this disclosure.Identical reference numeral represents identical in figure
Or similar part, thus repetition thereof will be omitted.
This example embodiment provides a kind of high-pass filter, can be applied to LCD phased array antenna.Such as Fig. 2 and Fig. 3
Shown, the high-pass filter can include the transmission line 20 between input terminal 21 and output terminal 22, the transmission line 20
It can include transmission line ontology 201 and the transmission line transition region 202 being connected with transmission line ontology 201.
Wherein, along the transmission direction of transmission line ontology 201, the width of transmission line transition region 202 is relative to transmission line ontology
201 width has exponent relation variation.
It should be noted that:The both sides of transmission line transition region 202 are connected with transmission line ontology 201, therefore its both sides
Width have exponent relation variation relative to the width of transmission line ontology 201.In addition, any in transmission line transition region 202
On direction of the side far from the side transmission line ontology 201, the width of the transmission line transition region 202 is provided with the upper limit, so that
The gradual change width of its both sides is finally reached same width value.
The high-pass filter that disclosure illustrative embodiments are provided is substituted traditional with the transmission line 20 of width gradual change
Discontinuous transmission line by the width of reasonable controlling transmission line transition region 202, can be significantly faster than the rate of decay of low frequency signal
The rate of decay of high-frequency signal, so as to fulfill its filter function.Compared to traditional condenser type high-pass filter, the transmission of gradual change
Line width can significantly inhibit the formation of back wave, and so as to substantially reduce standing-wave ratio, this is beneficial to improve using the high pass
The performance of the entire antenna system of wave filter.
In this example embodiment, the width of the transmission line transition region 202 can relative to the width of transmission line ontology 201
To be in e±qzExponential relationship changes.Wherein, q is variation coefficient and 1 × 10-3<q<100, z are transmitting for transmission line transition region 202
Relative to the distance of transmission line ontology 201 on direction.
It should be noted that:The distance relative to transmission line ontology 201 specifically refers to each of transmission line transition region 202
A position relative to transmission line transition region 202 and the interface of transmission line ontology 201 distance, that is, z=zx-z0, z0For transmission line gradually
Become area 202 and the interface coordinate of transmission line ontology 201, zxThe coordinate of any part for transmission line transition region 202.
So, by setting suitable q values, you can control low frequency signal is with e-|q|zSpeed with propagation distance it is fast
Speed attenuation, and high-frequency signal (microwave frequency band) is then with e-|q|z/2Velocity attenuation, then the rate of decay of high-frequency signal well below
The rate of decay of low frequency signal.
It is shown referring to figs. 2 and 3, the transmission line transition region 202 can include respectively with the transmission line ontology 201 of both sides
The first connected side such as left side and the second side such as right side.
There is the variation of line width, therefore in the line width variation of design either side in view of the both sides of transmission line transition region 202
It, should all be with the transmission line ontology 201 of this side as reference during relationship.For example, the transmission line transition region 202 on the left of design
Line width variation when, reference point should be left side transmission line transition region 202 and the interface of transmission line ontology 201, and reference direction is
From left to right;And during the line width variation of the transmission line transition region 202 on the right side of design, reference point should be right side transmission line gradual change
Area 202 and the interface of transmission line ontology 201, reference direction is right-to-left.
In this example embodiment, the first side width of the transmission line transition region 202 relative to first side transmission
The width of line ontology 201 is in eqzExponential relationship changes or in e-qzExponential relationship changes, wherein q=q1。
In this example embodiment, the second side width of the transmission line transition region 202 relative to the second side transmission
The width of line ontology 201 is in eqzExponential relationship changes or in e-qzExponential relationship changes, wherein q=q2。
Wherein, the variation coefficient q of 202 both sides of transmission line transition region can be equal, so as to form symmetrical transition region figure;
Alternatively, the variation coefficient q of 202 both sides of transmission line transition region can not also be waited, so as to form asymmetrical transition region figure.
In addition, the variation relation of 202 both sides of transmission line transition region can be identical, such as according to eqzExponential relationship change or
Person is according to e-qzExponential relationship changes;Or the variation relation of 202 both sides of transmission line transition region may be reversed, such as side
According to eqzExponential relationship variation, opposite side are according to e-qzExponential relationship changes.
The variation tendency of the wherein side of transmission line transition region 202 is illustrated below in conjunction with the accompanying drawings.
In one embodiment, the width of the transmission line transition region 202 can be gradual with the increase of transmission range
It is incremented to a certain predetermined width.For example, refering to what is shown in Fig. 2, the width of transmission line ontology 201 be w, transmission line transition region 202
The interface coordinate of left side and the side transmission line ontology 201 is z0, any part coordinate of transmission line transition region 202 is zx, then transmit
The left side any part width of line transition region 202 is
In another embodiment, the width of the transmission line transition region 202 can with the increase of transmission range and by
Gradually it is decremented to a certain predetermined width.For example, refering to what is shown in Fig. 3, the width of transmission line ontology 201 be w, transmission line transition region 202
The interface coordinate of left side and the side transmission line ontology 201 be z0, any part coordinate of transmission line transition region 202 is zx, then pass
The left side any part width of defeated line transition region 202 is
In other embodiments, the change width rule of the transmission line transition region 202 can be in Fig. 2 and Fig. 3
Any combination, the present embodiment are not especially limited this.
This example embodiment additionally provides a kind of liquid crystal antenna element 40, as shown in figure 4, including box is set first
Substrate 401 and second substrate 402, the liquid crystal layer 403 between first substrate 401 and second substrate 402, positioned at first substrate
401 towards 403 side of liquid crystal layer first alignment layer 404, taken positioned at second substrate 402 towards the second of 403 side of liquid crystal layer
To layer 405, the chip unit 406 of 403 side of liquid crystal layer is deviated from positioned at first substrate 401, positioned at first substrate 401 towards liquid crystal
The earth plate 407 and the microstrip line 408 on second substrate 402 of 403 side of layer.Wherein, it is set on the earth plate 407
There is trepanning 409, the chip unit 406 includes above-mentioned high-pass filter.According to the present embodiment, earth plate 407 and micro- is utilized
Band line 408 is respectively as first electrode and second electrode, to control the orientation of the liquid crystal molecule in liquid crystal layer 403, however this hair
It is bright without being limited thereto, in other embodiments, the orientation of liquid crystal molecule can also be controlled using the electrode that other manner is set.
The liquid crystal antenna element that disclosure illustrative embodiments are provided, using 20 institute of transmission line of above-mentioned width gradual change
The high-pass filter of composition, it is achieved thereby that the high degree of integration and miniaturized design of high-pass filter.Based on this, the liquid crystal day
On the one hand line unit can be blocked effectively and be sent to other antennas for the low frequency signal of liquid crystal movement to be controlled to be transmitted line
Unit, so as to avoid interfering with each other between antenna array unit, on the other hand again will not excessive influence to be finally sent to spoke
The microwave high-frequency signals of emitter or reflector, another further aspect can also substantially reduce standing-wave ratio, so as to be conducive to improve entire day
The performance of linear system system.
This example embodiment additionally provides a kind of LCD phased array antenna, as shown in Figure 5 and Figure 6, including array arrangement
Multiple liquid crystal antenna elements 40 and feeding interface 50.
Wherein, as shown in fig. 7, the LCD phased array antenna can be radial pattern phased array antenna.In the case, institute
State the radiating phase that the liquid crystal molecule in liquid crystal antenna element 40 can be used for each unit in control radiating curtain.
Alternatively, the LCD phased array antenna may be reflection-type phased array antenna.In the case, the liquid crystal day
Liquid crystal molecule in line unit 40 can be used for the reflected phase of each unit in control reflective array.
Those skilled in the art will readily occur to the disclosure its after considering specification and putting into practice invention disclosed herein
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principle of the disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.Description and embodiments are considered only as illustratively, and the true scope and spirit of the disclosure are by appended
Claim is pointed out.
It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present disclosure is only limited by appended claim.
Claims (10)
1. a kind of high-pass filter, which is characterized in that including the transmission line being located between input terminal and output terminal, the transmission line
The transmission line transition region being connected including transmission line ontology and with the transmission line ontology;
Wherein, along the transmission direction of the transmission line ontology, the width of the transmission line transition region is relative to the transmission line sheet
The width of body has exponent relation variation.
2. high-pass filter according to claim 1, which is characterized in that the width of the transmission line transition region is relative to institute
The width for stating transmission line ontology is in e±qzExponential relationship changes;
Wherein, q is variation coefficient and 1 × 10-3<q<100, z for transmission line transition region in the transmit direction relative to transmission line sheet
The distance of body.
3. high-pass filter according to claim 2, which is characterized in that the transmission line transition region include respectively with both sides
The first side for being connected of the transmission line ontology and the second side;
First side width of the transmission line transition region is in e relative to the width of transmission line ontology described in first sideqzIndex closes
System changes or in e-qzExponential relationship changes, q=q1;
The second side width of the transmission line transition region is in e relative to the width of transmission line ontology described in the second sideqzIndex closes
System changes or in e-qzExponential relationship changes, q=q2;
Wherein, q1=q2Or q1≠q2。
4. high-pass filter according to claim 3, which is characterized in that the variation relation of transmission line transition region both sides
It is identical.
5. high-pass filter according to claim 3, which is characterized in that the variation relation of transmission line transition region both sides
On the contrary.
6. a kind of liquid crystal antenna element, which is characterized in that including the first substrate and second substrate set to box, positioned at described
Liquid crystal layer between one substrate and the second substrate deviates from the patch list of the liquid crystal layer side positioned at the first substrate
Member, positioned at earth plate of the first substrate towards the liquid crystal layer side and the microstrip line on the second substrate;
Wherein, the chip unit includes claim 1-5 any one of them high-pass filters.
7. liquid crystal antenna element according to claim 6, which is characterized in that the liquid crystal antenna element is further included positioned at institute
First substrate is stated towards the first alignment layer of the liquid crystal layer side and positioned at the second substrate towards the liquid crystal layer one
The second orientation layer of side.
8. a kind of LCD phased array antenna, which is characterized in that multiple as described in claim any one of 6-9 including array arrangement
Liquid crystal antenna element.
9. liquid crystal antenna element according to claim 8, which is characterized in that the LCD phased array antenna is radial pattern phase
Control array antenna.
10. liquid crystal antenna element according to claim 8, which is characterized in that the LCD phased array antenna is reflection-type
Phased array antenna.
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CN201810005282.2A CN108232383A (en) | 2018-01-03 | 2018-01-03 | High-pass filter, liquid crystal antenna element and LCD phased array antenna |
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CN201810005282.2A CN108232383A (en) | 2018-01-03 | 2018-01-03 | High-pass filter, liquid crystal antenna element and LCD phased array antenna |
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Cited By (1)
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