CN109860963A - Phase shifter is filtered based on the liquid crystal of pectination microstrip line and hairpin resonator array - Google Patents
Phase shifter is filtered based on the liquid crystal of pectination microstrip line and hairpin resonator array Download PDFInfo
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Abstract
Filter phase shifter based on the liquid crystal of pectination microstrip line and hairpin resonator array, belong to microwave device technology field, solve existing phased array radar system because by phase shifter and filter separate it is individually designed due to cause own vol big, big problem is lost.The liquid crystal filters phase shifter: rectangular strip microstrip line, comb teeth-shaped microstrip line and hairpin resonator array are arranged on the bottom surface of top dielectric layer.The side of rectangular strip microstrip line is arranged in comb teeth-shaped microstrip line, and rectangular strip microstrip line is arranged in elongatedly on the bottom surface of top dielectric layer.Hairpin resonator array is the linear array being made of multiple hairpin resonators, the other side of rectangular strip microstrip line is arranged in along the length direction of rectangular strip microstrip line, there are gaps therebetween.The intermediate region hollow out of middle dielectric layer, which is arranged and passes through filling liquid crystal material, forms liquid crystal layer.Metal film is provided on the top surface of bottom dielectric layer.Pectination microstrip line and metal film are fitted closely with liquid crystal layer.
Description
Technical field
The present invention relates to a kind of filtering phase shifters, belong to microwave device technology field.
Background technique
In the Front-end Design of existing phased array radar system, phase shifter and filter often separate individually designed realization,
Then it is connected by 50 Ω transmission lines.However, this mode that phase shifter and filter are separated individually designed realization but can
Lead to following problems:
One, the transmission line introduced causes the volume of the radio-frequency front-end of phased array radar system to increase, this strongly limits
The application scenarios of phased array radar system.
Two, transmission line can be led in connection phase shifter and the loss of the impedance mismatching and transmission line itself generated when filter
The loss of phased array radar system is caused to increase, this seriously reduces the overall performance of phased array radar system.
Summary of the invention
The present invention be solve existing phased array radar system because by phase shifter and filter separate it is individually designed due to cause from
Body product is big, and big problem is lost, and proposes a kind of filter based on the liquid crystal of pectination microstrip line and hairpin resonator array and moves
Phase device.
It is of the present invention based on the liquid crystal of pectination microstrip line and hairpin resonator array filtering phase shifter include top
Dielectric layer 1, middle dielectric layer 2 and bottom dielectric layer 3；
Pectination microstrip line 4 and hairpin resonator array 5 are provided on the bottom surface of top dielectric layer 1；
Pectination microstrip line 4 includes rectangular strip microstrip line 4-1 and comb teeth-shaped microstrip line 4-2, comb teeth-shaped microstrip line 4-2 setting
In the side of rectangular strip microstrip line 4-1, rectangular strip microstrip line 4-1 is arranged in elongatedly on the bottom surface of top dielectric layer 1；
Hairpin resonator array 5 is the linear array being made of multiple hairpin resonators, along rectangular strip microstrip line
The length direction of 4-1 is arranged in the other side of rectangular strip microstrip line 4-1, hairpin resonator array 5 and rectangular strip micro-strip
There are gaps between line 4-1；
The intermediate region hollow out of middle dielectric layer 2 is arranged and forms liquid crystal layer 6 by filling liquid crystal material；
Metal film 7 is provided on the top surface of bottom dielectric layer 3；
Pectination microstrip line 4 and metal film 7 are fitted closely with liquid crystal layer 6；
When liquid crystal filtering phase shifter is in running order, pectination microstrip line 4 is the transmission line of radiofrequency signal, biasing
For voltage by pectination microstrip line 4 and the load of metal film 7 at the both ends of liquid crystal layer 6, liquid crystal layer 6 carries out phase shift to radiofrequency signal；Hair
Cassette resonator array 5 makes pectination microstrip line 4 that resonance occur, and pectination microstrip line 4 is filtered radiofrequency signal.
As preferably, top dielectric layer 1, middle dielectric layer 2 and bottom dielectric layer 3 are microwave board, the microwave
The range of the relative dielectric constant of plate is 2~10, and loss angle tangent is less than or equal to 0.01；
Top dielectric layer 1, middle dielectric layer 2 and bottom dielectric layer 3 are rectangular slab, and three's is equal in length, three
Width be equal；
Top dielectric layer 1 and the thickness of bottom dielectric layer 3 are less than 5mm, and the thickness of middle dielectric layer 2 is greater than or equal to
0.1mm and be less than or equal to 0.6mm.
As preferably, the width direction of top dielectric layer 1, length direction and thickness direction are respectively defined as the side x
It is arranged in elongatedly on the bottom surface of top dielectric layer 1 to, the direction y and the direction z, rectangular strip microstrip line 4-1 along the direction y；
The size of rectangular strip microstrip line 4-1 is wms×lms, wmsFor the length of rectangular strip microstrip line 4-1 in the x direction
Degree, lmsFor the length of rectangular strip microstrip line 4-1 in y-direction, 1mm≤wms≤4mm。
As preferably, comb teeth-shaped microstrip line 4-2 includes multiple minor matters microstrip lines, and multiple minor matters microstrip lines are and rectangle
Strip microstrip line 4-1 is vertically arranged and equidistantly distributed in y-direction；
The size of minor matters microstrip line is hs×ws, hsFor the length of minor matters microstrip line in the x direction, wsFor minor matters microstrip line
Length in y-direction, 0.15mm≤hs≤3.5mm。
As preferably, the multiple hairpin resonator is respectively that the first hairpin resonator~N hair fastener type is humorous
Shake device；
Each hairpin resonator is the rectangle frame of open at one end, the length of each hairpin resonator in y-direction
It is equal, the first hairpin resonator~length of N hairpin resonator in the x direction uniformly increases；
One end opposite with the spacious end in its side of each hairpin resonator is its first closed end；
For constituting the first hairpin resonator~N hairpin resonator of linear array, the former open end is after
The first closed end of person, the minimum spacing of each hairpin resonator and rectangular strip microstrip line 4-1 are equal, and adjacent two
The minimum spacing of hairpin resonator is equal；
Radiofrequency signal opens on pectination microstrip line 4 from the first closed end direction of hairpin resonator to side where end
Direction transmission.
As preferably, liquid crystal layer 6 is rectangular area, and the size of liquid crystal layer 6 is wLC×lLC, wLCIt is liquid crystal layer 6 in x
Length on direction, wLC=wms+hs+wu, wuExtend outward for liquid crystal layer 6 because of the edge effect of comb teeth-shaped microstrip line 4-2
Distance, lLCFor the length of liquid crystal layer 6 in y-direction, lLC≥50mm；
The side of liquid crystal layer 6 is concordant with the other side of rectangular strip microstrip line 4-1, the both ends of liquid crystal layer 6 respectively with comb teeth
The both ends of shape microstrip line 4-2 are concordant.
As preferably, the first end and second end of comb teeth-shaped microstrip line 4-2 is respectively close to the first hairpin resonator
With N hairpin resonator；
The minimum spacing of the first end of the closed end and comb teeth-shaped microstrip line 4-2 of first hairpin resonator is in y-direction
Projected length be equal to N hairpin resonator open end and comb teeth-shaped microstrip line 4-2 second end minimum spacing in the side y
Upward projected length, range are 0.1~0.5mm.
As preferably, the thickness of metal film 7 is less than 1mm.
As preferably, when 6 both ends of liquid crystal layer do not apply bias voltage, the long axis of liquid crystal molecule is each perpendicular to the side z
To.
It is of the present invention that phase shifter is filtered based on the liquid crystal of pectination microstrip line and hairpin resonator array, by filter
It designs and realizes with phase shifter zoarium, realize the working principle of phase shift and filter function simultaneously are as follows:
Pectination microstrip line 4 is the transmission line of radiofrequency signal, and bias voltage is existed by pectination microstrip line 4 and the load of metal film 7
The both ends of liquid crystal layer 6, liquid crystal layer 6 carry out phase shift to radiofrequency signal；It is humorous that pectination microstrip line 4 occurs for hairpin resonator array 5
Vibration, pectination microstrip line 4 are filtered radiofrequency signal.
According to the above working principle it is found that the liquid of the present invention based on pectination microstrip line and hairpin resonator array
Crystalline substance filtering phase shifter is because that can carry out phase shift and filtering to radiofrequency signal simultaneously.
With it is existing phase shifter and filter are separated into individually designed phased array radar system compared with, base of the present invention
Phase shifter is filtered because without small in size due to introducing transmission line, loss in the liquid crystal of pectination microstrip line and hairpin resonator array
It is small.
Detailed description of the invention
It will hereinafter come based on the embodiments and with reference to the accompanying drawings to of the present invention based on pectination microstrip line and hair fastener type
The liquid crystal filtering phase shifter of resonator array is described in more detail, in which:
Fig. 1 is the knot for filtering phase shifter described in embodiment based on the liquid crystal of pectination microstrip line and hairpin resonator array
Structure explosive view；
Fig. 2 is that the plane relative position of pectination microstrip line, hairpin resonator array and liquid crystal layer that embodiment refers to is shown
It is intended to；
Fig. 3 is the variation schematic diagram that the liquid crystal molecule that embodiment refers to is arranged with bias voltage, wherein arrow direction represents
Direction of an electric field, liquid crystal molecule from left to right is respectively at bias state, between orientation state and bias state and locates
In bias state；
Fig. 4 is that the liquid crystal that refers to of embodiment filters the return loss of phase shifter with the change curve of working frequency,
Wherein, VSim,biasFor bias voltage；
Fig. 5 is that the liquid crystal that embodiment refers to filters the insertion loss of phase shifter with the change curve of working frequency；
Fig. 6 is that the liquid crystal that embodiment refers to filters the phase of phase shifter with the change curve of working frequency；
Fig. 7 is that the liquid crystal that embodiment refers to filters the quality factor of phase shifter with the change curve of working frequency.
Specific embodiment
It is filtered to of the present invention based on the liquid crystal of pectination microstrip line and hairpin resonator array below in conjunction with attached drawing
Wave phase shifter is described further.
Embodiment: the present embodiment is explained in detail below with reference to FIG. 1 to FIG. 7.
Top is included based on the liquid crystal of pectination microstrip line and hairpin resonator array filtering phase shifter described in the present embodiment
Portion's dielectric layer 1, middle dielectric layer 2 and bottom dielectric layer 3；
Pectination microstrip line 4 and hairpin resonator array 5 are provided on the bottom surface of top dielectric layer 1；
Pectination microstrip line 4 includes rectangular strip microstrip line 4-1 and comb teeth-shaped microstrip line 4-2, comb teeth-shaped microstrip line 4-2 setting
In the side of rectangular strip microstrip line 4-1, rectangular strip microstrip line 4-1 is arranged in elongatedly on the bottom surface of top dielectric layer 1；
Hairpin resonator array 5 is the linear array being made of multiple hairpin resonators, along rectangular strip microstrip line
The length direction of 4-1 is arranged in the other side of rectangular strip microstrip line 4-1, hairpin resonator array 5 and rectangular strip micro-strip
There are gaps between line 4-1；
The intermediate region hollow out of middle dielectric layer 2 is arranged and forms liquid crystal layer 6 by filling liquid crystal material；
Metal film 7 is provided on the top surface of bottom dielectric layer 3；
Pectination microstrip line 4 and metal film 7 are fitted closely with liquid crystal layer 6；
When liquid crystal filtering phase shifter is in running order, pectination microstrip line 4 is the transmission line of radiofrequency signal, biasing
For voltage by pectination microstrip line 4 and the load of metal film 7 at the both ends of liquid crystal layer 6, liquid crystal layer 6 carries out phase shift to radiofrequency signal；Hair
Cassette resonator array 5 makes pectination microstrip line 4 that resonance occur, and pectination microstrip line 4 is filtered radiofrequency signal.
In the present embodiment, comb teeth-shaped microstrip line 4-2 be radiofrequency signal main transmission line, and be in resonant state hair
Cassette resonator array 5 couples.Rectangular strip microstrip line 4-1 mainly plays waveguiding action.
The top dielectric layer 1, middle dielectric layer 2 and bottom dielectric layer 3 of the present embodiment are microwave board, the microwave board
The range of relative dielectric constant is 2~10, and loss angle tangent is less than or equal to 0.01；
Top dielectric layer 1, middle dielectric layer 2 and bottom dielectric layer 3 are rectangular slab, and three's is equal in length, three
Width be equal；
Top dielectric layer 1 and the thickness of bottom dielectric layer 3 are less than 5mm, and the thickness of middle dielectric layer 2 is greater than or equal to
0.1mm and be less than or equal to 0.6mm.
In the present embodiment, the width direction of top dielectric layer 1, length direction and thickness direction are respectively defined as the side x
It is arranged in elongatedly on the bottom surface of top dielectric layer 1 to, the direction y and the direction z, rectangular strip microstrip line 4-1 along the direction y；
The size of rectangular strip microstrip line 4-1 is wms×lms, wmsFor the length of rectangular strip microstrip line 4-1 in the x direction
Degree, lmsFor the length of rectangular strip microstrip line 4-1 in y-direction.
In the present embodiment, due to wmsSignal wire characteristic impedance is significantly affected, it is too large or too small to be difficult to
It realizes good impedance matching, in conjunction with existing dielectric-slab plate thickness and dielectric constant range, its value range is set to: 1mm
≤wms≤4mm。
The comb teeth-shaped microstrip line 4-2 of the present embodiment includes multiple minor matters microstrip lines, and multiple minor matters microstrip lines are and rectangular strip
Shape microstrip line 4-1 is vertically arranged and equidistantly distributed in y-direction；
The size of minor matters microstrip line is hs×ws, hsFor the length of minor matters microstrip line in the x direction, wsFor minor matters microstrip line
Length in y-direction.
In the present embodiment, hsThe planet phasing rate of liquid crystal filtering phase shifter is significantly affected, in conjunction with existing
Its value range is set to: 0.15mm≤h by dielectric-slab plate thickness and dielectric constant ranges≤3.5mm。
Multiple hairpin resonators of the present embodiment are respectively the first hairpin resonator~N hairpin resonator；
Each hairpin resonator is the rectangle frame of open at one end, the length of each hairpin resonator in y-direction
It is equal, the first hairpin resonator~length of N hairpin resonator in the x direction uniformly increases；
One end opposite with the spacious end in its side of each hairpin resonator is its first closed end；
For constituting the first hairpin resonator~N hairpin resonator of linear array, the former open end is after
The first closed end of person, the minimum spacing of each hairpin resonator and rectangular strip microstrip line 4-1 are equal, and adjacent two
The minimum spacing of hairpin resonator is equal；
Radiofrequency signal opens on pectination microstrip line 4 from the first closed end direction of hairpin resonator to side where end
Direction transmission.
In the present embodiment, the sum of three edge lengths of hairpin resonator directly affect filter resonance frequency point, filter
The relationship of the sum of three edge lengths of the wavelength of wave resonance frequency point and hairpin resonator are as follows: λg,0=(2wi+hi)/4, wherein wiFor
The length of hairpin resonator in the x direction, hiFor the length of hairpin resonator in y-direction.
The liquid crystal layer 6 of the present embodiment is rectangular area, and the size of liquid crystal layer 6 is wLC×lLC, wLCIt is liquid crystal layer 6 in the direction x
On length, wLC=wms+hs+wu, wuFor the distance that liquid crystal layer 6 extends outward by the edge effect of comb teeth-shaped microstrip line 4-2,
lLCFor the length of liquid crystal layer 6 in y-direction；
The side of liquid crystal layer 6 is concordant with the other side of rectangular strip microstrip line 4-1, the both ends of liquid crystal layer 6 respectively with comb teeth
The both ends of shape microstrip line 4-2 are concordant.
In the present embodiment, consider in order to realize biggish amount of phase shift and stable electrical property, by lLCValue range
It is set to: lLC≥50mm.The thickness of liquid crystal layer 6 and the consistency of thickness of middle dielectric layer 2, comprehensively consider the electric orientation of liquid crystal molecule
The overall performance of response time and liquid crystal filtering phase shifter, the value range of the thickness of liquid crystal layer 6 is set to: 0.1mm
≤h2≤0.6mm。
The first end and second end of the comb teeth-shaped microstrip line 4-2 of the present embodiment is respectively close to the first hairpin resonator and
N hairpin resonator；
The minimum spacing of the first end of the closed end and comb teeth-shaped microstrip line 4-2 of first hairpin resonator is in y-direction
Projected length be equal to N hairpin resonator open end and comb teeth-shaped microstrip line 4-2 second end minimum spacing in the side y
Upward projected length, range are 0.1~0.5mm.
The thickness of the metal film 7 of the present embodiment is less than 1mm.
In the present embodiment, when 6 both ends of liquid crystal layer do not apply bias voltage, the long axis of liquid crystal molecule is each perpendicular to the side z
To that is, liquid crystal molecule is in orientation state.
The bottom dielectric layer 3 of the present embodiment is located at the lower section of middle dielectric layer 2 and liquid crystal layer 6, under liquid crystal layer 6
The encapsulation in portion.On the bottom surface of the part being in contact with liquid crystal layer 6 and pectination microstrip line 4 of top dielectric layer 1 and metal film 7
It is provided with alignment film, the setting of alignment film is for making when 6 both ends of liquid crystal layer do not apply bias voltage, the long axis of liquid crystal molecule
It is each perpendicular to the direction z.Wherein, the formation of alignment film can use any scheme, as long as realizing the initial alignment effect of liquid crystal molecule
?.
Illustrate that the liquid crystal filtering phase shifter has good phase shift and filtering below by specific example and data
Function:
This specific example gives the liquid crystal filtering phase shifter for working in 2~9GHz.
Bias voltage, at the both ends of liquid crystal layer 6, passes through adjusting bias voltage by pectination microstrip line 4 and the load of metal film 7
It can change the arrangement of liquid crystal molecule, and then change the relative dielectric constant ε of liquid crystal layer 6 in all directionsLC。
Relative dielectric constant ε of the liquid crystal that this specific example is selected when bias voltage is 0V, on action directionLCIt is 2.5,
Relative dielectric constant ε when bias voltage is 25V, on action directionLCBe 3.2, i.e., bias voltage 0V~25V change when,
The relative dielectric constant ε of liquid crystalLCIt can be continuously adjusted between 2.5~3.2, to realize liquid crystal filtering phase shifter to penetrating
The regulation of frequency signal phase.In addition, the liquid crystal that this specific example is selected is stablized in microwave band loss angle tangent, it is 0.025.
When work, radiofrequency signal is on pectination microstrip line 4 from the first closed end direction of hairpin resonator to side
Spacious end direction transmission.Apply bias voltage to the both ends of liquid crystal layer 6 by bias device, to change the effective of liquid crystal layer 6
Dielectric constant obtains the electrical performance data of the liquid crystal filtering phase shifter, as shown in Figure 4 to 7 with this condition.
Fig. 4 is that the liquid crystal filters the return loss of phase shifter with the change curve of working frequency.As can be seen from FIG. 4,
No matter bias voltage is 0V or 25V, in entire passband frequency range (2~4.2GHz and 6.2~9GHz), the liquid crystal filter
The impedance matching of wave phase shifter is good, and return loss is below -10dB.
Fig. 5 is that the liquid crystal filters the insertion loss of phase shifter with the change curve of working frequency.As can be seen from FIG. 5,
In entire passband frequency range, the insertion loss of the liquid crystal filtering phase shifter is controlled within the scope of 2.5dB.
Fig. 6 is that the liquid crystal filters the phase of phase shifter with the change curve of working frequency.As can be seen from FIG. 6, described
Liquid crystal filters phase shifter can be achieved 30 ° to 190 ° of phase shift in entire passband frequency range.
Fig. 7 is that the liquid crystal filters the quality factor of phase shifter with the change curve of working frequency.As can be seen from FIG. 7,
In entire passband frequency range, quality factor reaches 26 °/dB~51 °/dB.In addition, in stopband range (4.5~6GHz),
Stopband attenuation realizes the decaying of 15dB or more, has good noise suppressed effect.
According to above-mentioned data it is found that liquid crystal filtering phase shifter can be realized the complex function of phase shift and filtering, pass through
Optimization design may be implemented to possess good loss and quality factor in passband, and realize stable filtering in stopband.
Described in the present embodiment based on the liquid crystal of pectination microstrip line and hairpin resonator array filtering phase shifter have with
Lower advantage:
One, use comb teeth-shaped microstrip line for the main transmission line of radiofrequency signal, in the phase for improving the liquid crystal filtering phase shifter
It has a significant effect in position tuning rate and quality factor.
Two, with the hairpin resonator array in resonant state coupling occurs for comb teeth-shaped microstrip line, ensure that steady
Fixed filtered band range, realizes while continuous adjustment phase place, filters out the purpose of noise and interference signal.
Three, the liquid crystal filtering phase shifter is in the systems such as phased-array radar in application, can replace existing filter completely
Wave device and the cascade form of phase shifter have apparent advantage in terms of reducing system weight and reducing.
Although describing the present invention herein with reference to specific implementation method, it should be understood that, these realities
Applying example only is the example of principles and applications.It should therefore be understood that can be permitted exemplary embodiment
More modifications, and can be designed that other arrangements, without departing from spirit of the invention as defined in the appended claims and
Range.It should be understood that different appurtenances can be combined by being different from method described in original claim
It is required that and feature described herein.It will also be appreciated that the feature in conjunction with described in separate embodiments can be used at it
In his embodiment.
Claims (9)
1. filtering phase shifter based on the liquid crystal of pectination microstrip line and hairpin resonator array, which is characterized in that the liquid crystal filter
Wave phase shifter includes top dielectric layer (1), middle dielectric layer (2) and bottom dielectric layer (3)；
Pectination microstrip line (4) and hairpin resonator array (5) are provided on the bottom surface of top dielectric layer (1)；
Pectination microstrip line (4) includes rectangular strip microstrip line (4-1) and comb teeth-shaped microstrip line (4-2), comb teeth-shaped microstrip line (4-2)
It is arranged in the side of rectangular strip microstrip line (4-1), top dielectric layer (1) is arranged in rectangular strip microstrip line (4-1) elongatedly
Bottom surface on；
Hairpin resonator array (5) is the linear array being made of multiple hairpin resonators, along rectangular strip microstrip line (4-
1) length direction is arranged in the other side of rectangular strip microstrip line (4-1), and hairpin resonator array (5) and rectangular strip are micro-
There are gaps between band line (4-1)；
The intermediate region hollow out of middle dielectric layer (2) is arranged and forms liquid crystal layer (6) by filling liquid crystal material；
Metal film (7) are provided on the top surface of bottom dielectric layer (3)；
Pectination microstrip line (4) and metal film (7) are fitted closely with liquid crystal layer (6)；
When liquid crystal filtering phase shifter is in running order, pectination microstrip line (4) is the transmission line of radiofrequency signal, biased electrical
For pressure by pectination microstrip line (4) and metal film (7) load at the both ends of liquid crystal layer (6), liquid crystal layer (6) moves radiofrequency signal
Phase；Hairpin resonator array (5) makes pectination microstrip line (4) that resonance occurs, and pectination microstrip line (4) filters radiofrequency signal
Wave.
2. phase shifter is filtered based on the liquid crystal of pectination microstrip line and hairpin resonator array as described in claim 1, it is special
Sign is that top dielectric layer (1), middle dielectric layer (2) and bottom dielectric layer (3) are microwave board, the microwave board it is opposite
The range of dielectric constant is 2~10, and loss angle tangent is less than or equal to 0.01；
Top dielectric layer (1), middle dielectric layer (2) and bottom dielectric layer (3) they are rectangular slab, and three's is equal in length, and three
The width of person is equal；
Top dielectric layer (1) and the thickness of bottom dielectric layer (3) are less than 5mm, and the thickness of middle dielectric layer (2) is greater than or equal to
0.1mm and be less than or equal to 0.6mm.
3. phase shifter is filtered based on the liquid crystal of pectination microstrip line and hairpin resonator array as claimed in claim 2, it is special
Sign is, the width direction of top dielectric layer (1), length direction and thickness direction are respectively defined as the direction x, the direction y and the side z
To elongatedly rectangular strip microstrip line (4-1) is arranged on the bottom surface of top dielectric layer (1) along the direction y；
The size of rectangular strip microstrip line (4-1) is wms×lms, wmsFor the length of rectangular strip microstrip line (4-1) in the x direction
Degree, lmsFor the length of rectangular strip microstrip line (4-1) in y-direction, 1mm≤wms≤4mm。
4. phase shifter is filtered based on the liquid crystal of pectination microstrip line and hairpin resonator array as claimed in claim 3, it is special
Sign is, comb teeth-shaped microstrip line (4-2) includes multiple minor matters microstrip lines, multiple minor matters microstrip lines with rectangular strip microstrip line
(4-1) is vertically arranged and equidistantly distributed in y-direction；
The size of minor matters microstrip line is hs×ws, hsFor the length of minor matters microstrip line in the x direction, wsIt is minor matters microstrip line in the side y
Upward length, 0.15mm≤hs≤3.5mm。
5. phase shifter is filtered based on the liquid crystal of pectination microstrip line and hairpin resonator array as claimed in claim 4, it is special
Sign is that the multiple hairpin resonator is respectively the first hairpin resonator~N hairpin resonator；
Each hairpin resonator is the rectangle frame of open at one end, and the length of each hairpin resonator in y-direction is homogeneous
Deng the first hairpin resonator~length of N hairpin resonator in the x direction uniformly increases；
One end opposite with the spacious end in its side of each hairpin resonator is its first closed end；
For constituting the first hairpin resonator~N hairpin resonator of linear array, the former open end is towards the latter's
The minimum spacing of first closed end, each hairpin resonator and rectangular strip microstrip line (4-1) is equal, two adjacent hairs
The minimum spacing of cassette resonator is equal；
Radiofrequency signal opens end place side on pectination microstrip line (4) from the first closed end direction of hairpin resonator to side
To transmission.
6. phase shifter is filtered based on the liquid crystal of pectination microstrip line and hairpin resonator array as claimed in claim 5, it is special
Sign is that liquid crystal layer (6) is rectangular area, and the size of liquid crystal layer (6) is wLC×lLC, wLCIn the x direction for liquid crystal layer (6)
Length, wLC=wms+hs+wu, wuFor the distance that liquid crystal layer (6) extends outward by the edge effect of comb teeth-shaped microstrip line (4-2),
lLCFor the length of liquid crystal layer (6) in y-direction, lLC≥50mm；
The side of liquid crystal layer (6) is concordant with the other side of rectangular strip microstrip line (4-1), the both ends of liquid crystal layer (6) respectively with comb
The both ends of dentation microstrip line (4-2) are concordant.
7. phase shifter is filtered based on the liquid crystal of pectination microstrip line and hairpin resonator array as claimed in claim 6, it is special
Sign is that the first end and second end of comb teeth-shaped microstrip line (4-2) is humorous respectively close to the first hairpin resonator and N hair fastener type
Shake device；
The minimum spacing of the first end of the closed end and comb teeth-shaped microstrip line (4-2) of first hairpin resonator is in y-direction
Projected length is equal to the minimum spacing of the open end of N hairpin resonator and the second end of comb teeth-shaped microstrip line (4-2) in the side y
Upward projected length, range are 0.1~0.5mm.
8. phase shifter is filtered based on the liquid crystal of pectination microstrip line and hairpin resonator array as claimed in claim 7, it is special
Sign is that the thickness of metal film (7) is less than 1mm.
9. phase shifter is filtered based on the liquid crystal of pectination microstrip line and hairpin resonator array as claimed in claim 8, it is special
Sign is that, when liquid crystal layer (6) both ends do not apply bias voltage, the long axis of liquid crystal molecule is each perpendicular to the direction z.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101719576A (en) * | 2009-12-02 | 2010-06-02 | 华东交通大学 | Embedded microwave bandpass filter |
| US8143972B2 (en) * | 2008-09-26 | 2012-03-27 | Kabushiki Kaisha Toshiba | Resonator and filter |
| US20120262252A1 (en) * | 2011-04-15 | 2012-10-18 | Microelectronics Technology Inc. | Band-pass filter |
| CN104810579A (en) * | 2015-05-12 | 2015-07-29 | 中国矿业大学 | Tunable bandstop filter based on artificial surface plasmon |
| EP2993484A1 (en) * | 2014-09-08 | 2016-03-09 | Kabushiki Kaisha Toshiba | Multiband filter |
| CN107994302A (en) * | 2017-11-27 | 2018-05-04 | 京东方科技集团股份有限公司 | Liquid crystal phase shifter and its method of work |
| CN208489337U (en) * | 2018-08-23 | 2019-02-12 | 江苏师范大学 | A kind of broadband band-pass filter |
-
2019
- 2019-04-01 CN CN201910257754.8A patent/CN109860963B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8143972B2 (en) * | 2008-09-26 | 2012-03-27 | Kabushiki Kaisha Toshiba | Resonator and filter |
| CN101719576A (en) * | 2009-12-02 | 2010-06-02 | 华东交通大学 | Embedded microwave bandpass filter |
| US20120262252A1 (en) * | 2011-04-15 | 2012-10-18 | Microelectronics Technology Inc. | Band-pass filter |
| EP2993484A1 (en) * | 2014-09-08 | 2016-03-09 | Kabushiki Kaisha Toshiba | Multiband filter |
| CN104810579A (en) * | 2015-05-12 | 2015-07-29 | 中国矿业大学 | Tunable bandstop filter based on artificial surface plasmon |
| CN107994302A (en) * | 2017-11-27 | 2018-05-04 | 京东方科技集团股份有限公司 | Liquid crystal phase shifter and its method of work |
| CN208489337U (en) * | 2018-08-23 | 2019-02-12 | 江苏师范大学 | A kind of broadband band-pass filter |
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