CN106058412B - The adjusting method and filter of a kind of Tai Ji type resonator, filter - Google Patents
The adjusting method and filter of a kind of Tai Ji type resonator, filter Download PDFInfo
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- CN106058412B CN106058412B CN201610317669.2A CN201610317669A CN106058412B CN 106058412 B CN106058412 B CN 106058412B CN 201610317669 A CN201610317669 A CN 201610317669A CN 106058412 B CN106058412 B CN 106058412B
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- circular arc
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/08—Strip line resonators
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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
- H01P1/20327—Electromagnetic interstage coupling
- H01P1/20354—Non-comb or non-interdigital filters
- H01P1/20381—Special shape resonators
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Abstract
The invention discloses a kind of Tai Ji type resonator, filter and its adjusting methods, wherein, the Tai Ji type resonator includes substrate, the resonator circuit pattern being formed on substrate, the resonator circuit pattern form is positive fish or negative fish shape in female and male fish taiji pattern, wherein circuit is grounded at the positive fish of pattern or negative fish head portion flake, and positive fish or negative fish tail portion connect feed line.Filter of the invention uses the gradual change λ of anode and cathodeg/ 4 resonator structure is grounded in end.The structure has gradual change stepped impedance (SIR) characteristic, while introducing ground hole and resonator resonance size is made to be about λg/ 4, further reduce filter size.In addition, filter construction design is more also simple.
Description
Technical field
The invention belongs to microwave and millimeter wave passive device technical field more particularly to a kind of Tai Ji type resonators, filtering
Device and its adjusting method.
Background technique
Frequency microwave filter is the important component of communication system, radar system, measuring system, the quality of performance
It is related to the superiority and inferiority of system performance.Therefore, frequency microwave filter is always the emphasis and hot spot of wireless communication field research.With
The development of Modern wireless communication technology, system to electromagnetic compatibility, it is jamproof require it is higher and higher.
Traditional Design of microwave filters is mostly directly according to design objective requirement, and being designed using low-pass prototype derivation is needed
Then the reactance for the filter wanted, resistance value derive that each section of the filter construction of needs is special according to some shift theories
Property impedance value, finally realize filter with the microstrip line of different characteristics impedance.This method design is more accurate, but design process
Relatively complicated, the design cycle is longer, has in the prior art using coefficient of coup matrix design bandpass filter, this method is simple
The quick design cycle is shorter, but filter is using λg/ 2 parallel coupled line structure, filter construction are larger.Meanwhile
Also have and further use λg/ 4 interdigital coupled structure, so that body actively reduces greatly, but due to using uniform
Parallel shorts cable architecture, this makes the volume of filter still bigger than normal, is not well positioned to meet design requirement.
Summary of the invention
The purpose of the present invention solves above-mentioned prior art problem, provides a kind of Tai Ji type resonator, filter and its adjusting
Method, the structure design of Tai Ji type effectively reduce the volume of filter, meanwhile, which meets differential mode in performance and inserts
Enter to be lost small, the big feature of common mode inhibition, engineering aesthetics is relatively met in shape and structure design.
The technical scheme of the present invention is realized as follows: a kind of Tai Ji type resonator, including substrate and it is formed in substrate
On resonator circuit pattern, which is characterized in that the resonator circuit pattern form be female and male fish taiji pattern in positive fish
Or negative fish shape, wherein circuit is grounded at the positive fish of pattern or negative fish head portion flake, and positive fish or negative fish tail portion connect feed line.
Preferably, the outer profile for forming the resonator Tai Ji type pattern includes three sections of semi-circular arc lines, wherein first
Circular arc line first end and the tangent tail portion for forming circuit sun fish or negative fish diagram case of the second circular arc line first end；Third circular arc line
First end and the second circular arc line the second end it is tangent, the second end phase of the second end of third circular arc line and the first circular arc line
It cuts, forms the head of circuit sun fish or negative fish diagram case；The diameter of the diameter of first circular arc line and/or the second circular arc line is set as humorous
The resonance frequency adjusting parameter of vibration device.
Preferably, the circle is adjusted for making circuit ground for circular through hole at the flake of circuit sun fish or negative fish diagram case
The diameter of shape through-hole is to adjust the resonance frequency of resonator.
Further, a kind of Tai Ji mode filter, including two groups of Tai Ji type resonators, two groups of Tai Ji type resonator coupling
Conjunction forms female and male fish Diagram of the Supreme Ultimate shape.
Preferably, the outer profile for forming the resonator Tai Ji type pattern includes three sections of semi-circular arc lines, wherein first
Circular arc line first end and the tangent tail portion for forming circuit sun fish or negative fish diagram case of the second circular arc line first end；Third circular arc line
First end and the second circular arc line the second end it is tangent, the second end phase of the second end of third circular arc line and the first circular arc line
It cuts, forms the head of circuit sun fish or negative fish diagram case；The diameter of the diameter of first circular arc line and/or the second circular arc line is set as humorous
The resonance frequency adjusting parameter of vibration device.
Preferably, the second circular arc line of resonator and third circular arc line connection point are resonator central point, two resonator centrals
The distance of point is set as filter freguency response and coupling parameter adjusting parameter.
Preferably, the outer profile for forming resonator Tai Ji type pattern includes three sections of semi-circular arc lines, wherein the first circular arc
Line first end and the tangent tail portion for forming circuit sun fish or negative fish diagram case of the second circular arc line first end；The of third circular arc line
The second end of one end and the second circular arc line is tangent, and the second end of third circular arc line and the second end of the first circular arc line are tangent,
Form the head of circuit sun fish or negative fish diagram case；The diameter of the first circular arc line and/or the diameter of the second circular arc line are adjusted to adjust
The resonance frequency of resonator.
It is further preferred that the diameter of adjusting the first circular arc line of resonator and/or the diameter of the second circular arc line are humorous to adjust
The resonance frequency of vibration device, and/or, the distance of 2 resonator central points is adjusted to adjust filter freguency response and coupling parameter.
Compared with prior art, the beneficial effects of the present invention are the gradual change λ that: filter of the invention uses anode and cathodeg/
4 resonator structure is grounded in end.The structure have gradual change stepped impedance (SIR) characteristic, while introduce ground hole make it is humorous
Device resonance size of shaking is about λg/ 4, further reduce filter size.In addition, filter construction design is more also simple.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 show the schematic perspective view of the Tai Ji mode filter of the embodiment of the present invention；
Fig. 2 show as the planar structure schematic diagram of filter described in the present embodiment；
Fig. 3 show the main coupling schematic diagram of Tai Ji mode filter of the embodiment of the present invention；
Fig. 4 show the coupling matrix of Tai Ji mode filter of the embodiment of the present invention；
Fig. 5 show the field distribution of Tai Ji mode filter of the embodiment of the present invention；
Fig. 6 show resonator outer diameter described in the embodiment of the present invention to the influence curve of resonance frequency；
Fig. 7 show via hole aperture of the present invention to the influence curve of resonance frequency；
Fig. 8 show the relation curve of distance s and transmission characteristic response between different resonators；
Fig. 9 show the simulation result diagram of filter described in the embodiment of the present invention；
Figure 10 show the emulation of filter described in the embodiment of the present invention and actual measurement comparison diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of Tai Ji type resonator, including substrate and the resonator circuit pattern being formed on the substrate, the resonance
Device circuit pattern shape is positive fish or negative fish shape in female and male fish taiji pattern, wherein positive fish or negative fish head of the circuit in pattern
It is grounded at portion's flake, positive fish or negative fish tail portion connect feed line；It is further preferred that the foreign steamer of composition resonator Tai Ji type pattern
Exterior feature includes three sections of semi-circular arc lines, wherein the first circular arc line first end and the tangent formation circuit of the second circular arc line first end
The tail portion of positive fish or negative fish diagram case；The first end of third circular arc line and the second end of the second circular arc line are tangent, third circular arc
The second end of line and the second end of the first circular arc line are tangent, form the head of circuit sun fish or negative fish diagram case；First circular arc line
The diameter of diameter and/or the second circular arc line is set as the resonance frequency adjusting parameter of resonator.
It preferably, is circular through hole at the flake of the circuit sun fish or negative fish diagram case, for making circuit ground, adjusting institute
The diameter of circular through hole is stated to adjust the resonance frequency of resonator.
Embodiment as one preferred is as shown in Figure 1 the three-dimensional knot of the Tai Ji mode filter of the embodiment of the present invention
Structure schematic diagram, including two groups of Tai Ji type resonators, two groups of Tai Ji type resonator couple to form female and male fish Diagram of the Supreme Ultimate shape.Into
One step, the outer profile for forming the resonator Tai Ji type pattern includes three sections of semi-circular arc lines, wherein the first circular arc line 1 the
One end and the tangent tail portion for forming circuit sun fish or negative fish diagram case of 2 first end of the second circular arc line；The first of third circular arc line 3
End and the second end of the second circular arc line 2 are tangent, and the second end of third circular arc line 3 and the second end of the first circular arc line 1 are tangent,
Form the head of circuit sun fish or negative fish diagram case；The diameter of the diameter of first circular arc line 1 and/or the second circular arc line 2 is set as humorous
The resonance frequency adjusting parameter of vibration device；Further, the second circular arc line of resonator 2 and 3 tie point of third circular arc line are resonator
The distance of central point, 2 resonator central points is set as filter freguency response and coupling parameter adjusting parameter.
It is illustrated in figure 2 the planar structure schematic diagram of filter described in the present embodiment, in figure, W is the width of substrate, L table
Show the length of substrate, Wf indicates the width of feed line, and Lf is the length of feed line, L3 be feeder line edge apart from substrate edges away from
From L1, L2 respectively indicate the wire length of matching minor matters, and Wa is matching minor matters line width, and D2 is the first circular arc line 1 of the resonator
Diameter, D1 are the second circular arc line of the resonator or the diameter of third circular arc line, and S is the spacing among two resonators.It is being situated between
For a block of metal, size is identical as substrate for matter layer lower surface.
Preferably, the frequency adjusting method of above-mentioned Tai Ji type resonator, by adjust the first circular arc line 1 diameter and/or
The diameter of second circular arc line 2 is to adjust the resonance frequency of resonator.
Preferably, a kind of frequency adjusting method of Tai Ji mode filter, by adjusting the straight of the first circular arc line of resonator 1
The diameter of diameter and/or the second circular arc line 2 to adjust the resonance frequency of resonator, and/or, adjust the distance of 2 resonator central points
To adjust filter freguency response and coupling parameter.
Conventional filter design is mostly designed using low-pass prototype by tabling look-up and converting principle accordingly, is designed
Journey is relatively complicated tediously long.It is illustrated in figure 3 the main coupling schematic diagram of Tai Ji mode filter of the present invention, using setting for coupling matrix
Meter mode, using the eigen mode Solution model of three-dimensional full-wave analysis software HFSS, analysis obtains two resonance peaks of filter, then
The coefficient of coup between the resonator for the working frequency range that needs are calculated using formula (1), then again in HFSS according to weak coupling feelings
Condition and formula (2) calculate the External Q of frequency range needs, finally obtain and meet the coupling moment as shown in Figure 4 that design needs
Battle array, passes through the coefficient of coup M in physics realization coupling matrixL1, M12, ML2The frequency response characteristic of filter may be implemented.
The expression formula of the coefficient of coup is
Wherein fHFor the cutoff frequency of the high frequency treatment of three dB bandwidth, fLFor the cutoff frequency at the low frequency of three dB bandwidth, K two
The coefficient of coup of resonator.
The expression formula of external sort factor is
Wherein w0For filter center working frequency, Δ w±90°To deviate S11Phase be ± 90 ° of frequency at 0.It needs
It is noted that sometimes S11Phase be not at resonance frequency be 0, but have certain deviation, should when design
Δ w is determined on the basis of this offset point±90°。
As shown in Figure 5 by electric field intensity value, the electric field amplitude distribution of the present embodiment Tai Ji filter is given.Work as electromagnetism
After wave enters from the conduction of input impedance line, main path signal by the transmission of the resonator that is connected directly, another part by coupling from
The transmission of another resonator.Electric field between two resonator gaps is stronger, herein to be electrically coupled, by controlling two resonator spacing
S can control the size of coupling amount, to be allowed to meet the design requirement of coupling amount shown in Fig. 4.
In the equivalent circuit of filter, in the i.e. controllable equivalent circuit of size by changing resonator dimensions D1 and D2
Capacitance, by change metallization VIA size can control equivalent circuit in equivalent inductance size, to also be adjustable filter
The center operating frequency of wave device.By controlling the size of coupling line line width Wa, it is allowed to meet the outer of filter by optimization design
Portion's Q value, to realize the matched well of filter input and output impedance.
Pass through theory since the size of resonator mainly influences the working frequency of the filter by HFSS modeling and simulating
It calculates, fine tuning resonator outer dimension D 1 can obtain filter freguency response curve graph shown in fig. 6, the frequency of abscissa representation signal
Rate, unit GHz, ordinate are the response amplitude of signal, and unit dB changes the available difference of size of resonator outer diameter D 1
Frequency response curve.It can be obtained from the figure that the size as D1 is bigger, the working frequency of filter is just lower, this with theory coincide compared with
It is good, enable to meet design needs by optimizing fine tuning.Fig. 7 is metallization VIA aperture to the shadow with interior return loss S11
It rings, the frequency of abscissa representation signal, unit GHz, ordinate is the response amplitude of signal, unit dB, by adjusting via hole
Radius D can will be obtained, and when the more big inductance value at this time of via hole is smaller, resonance frequency is bigger.
It is illustrated in figure 8 the graph of relation of distance s and transmission characteristic response between different resonators, abscissa representation signal
Frequency, unit GHz, ordinate is the response amplitude of signal, and unit dB, the sizes of distance s can obtain between changing resonator
To different frequency response curves.When s it is bigger coupling it is weaker, the bandwidth of operation of filter is smaller, when s value it is smaller couple it is stronger,
The bandwidth of operation of filter is bigger.By optimizing main affecting parameters, final optimization pass has devised emulation knot shown in Fig. 9
Fruit, in figure, filter work is in 5.5GHz-6.1GHz, and in-band insertion loss S21 is less than -1.5dB, with interior return loss S11
Less than -20dB, which substantially meets the requirement of engineering practice.
It is designed as a specific embodiment, the width W=15mm of substrate, the length L=29.8mm of substrate, feed line
Width W_f=2mm, the length L_f=5mm of feed line, distance L3=5.2mm of the feeder line edge apart from substrate edges, matching
One of wire length of minor matters L2=3.3mm matches two L1=2.7mm of the wire length of minor matters, matches minor matters line width W_a=0.3mm, humorous
Shake extension diameter of a circle D2=12.2mm, the resonator inside diameter of a circle D1=6mm of device, and the interval S among two resonators=
0.2mm.Survey to obtain shown in Fig. 10 using vector network analyzer as a result, filter work is in 5.5GHz-6.1GHz,
Minimum insertion loss with sub-miniature A connector is 0.67dB, and the in-band insertion loss S21 with sub-miniature A connector is less than 1.6dB, with interior echo
S11 is lost and is less than -17dB, which substantially conforms to emulation, meets the requirement of engineering practice.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.This field
Those of ordinary skill disclosed the technical disclosures can make according to the present invention and various not depart from the other each of essence of the invention
The specific variations and combinations of kind, these variations and combinations are still within the scope of the present invention.
Claims (5)
1. a kind of Tai Ji mode filter, which is characterized in that including two groups of Tai Ji type resonators, two groups of Tai Ji type resonator coupling
Conjunction forms female and male fish Diagram of the Supreme Ultimate shape, and circuit is grounded at the positive fish of pattern and negative fish head portion flake, and positive fish and negative fish tail portion connect
Connect feed line；The straight of the circular through hole is adjusted for making circuit ground at the flake of positive fish or negative fish diagram case for circular through hole
Diameter is to adjust the resonance frequency of resonator.
2. Tai Ji mode filter according to claim 1, which is characterized in that the outer profile of composition resonator Tai Ji type pattern
Including three sections of semi-circular arc lines, wherein the first circular arc line first end and the tangent formation circuit sun of the second circular arc line first end
The tail portion of fish or negative fish diagram case；The first end of third circular arc line and the second end of the second circular arc line are tangent, third circular arc line
Second end and the first circular arc line second end it is tangent, form the head of circuit sun fish or negative fish diagram case；First circular arc line it is straight
The diameter of diameter and/or the second circular arc line is set as the resonance frequency adjusting parameter of resonator.
3. Tai Ji mode filter according to claim 2, which is characterized in that second circular arc line of resonator and third circle
Camber line tie point is resonator central point, and the distance of 2 resonator central points is set as filter freguency response and coupling parameter tune
Whole parameter.
4. a kind of frequency adjusting method of Tai Ji type resonator, which is characterized in that the Tai Ji type resonator include substrate and
The resonator circuit pattern being formed on substrate, the circuit pattern shape of the resonator are the positive fish in female and male fish taiji pattern
Or negative fish shape, wherein circuit is grounded at the positive fish of pattern or negative fish head portion flake, and positive fish or negative fish tail portion connect feed line；
The outer profile for forming resonator Tai Ji type pattern includes three sections of semi-circular arc lines, wherein the first circular arc line first end and second
The tangent tail portion for forming circuit sun fish or negative fish diagram case of circular arc line first end；The first end of third circular arc line and the second circular arc
The second end of line is tangent, and the second end of third circular arc line and the second end of the first circular arc line are tangent, forms circuit sun fish or yin
The head of fish diagram case；The diameter of the first circular arc line and/or the diameter of the second circular arc line are adjusted to adjust the resonance frequency of resonator.
5. a kind of frequency adjusting method of Tai Ji mode filter as claimed in claim 3, which is characterized in that adjust resonator the
The diameter of the diameter of one circular arc line and/or the second circular arc line to adjust the resonance frequency of resonator, and/or, adjust two resonators
The distance of central point is to adjust filter freguency response and coupling parameter.
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| CN106058412B true CN106058412B (en) | 2019-01-22 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201332134Y (en) * | 2009-01-09 | 2009-10-21 | 东南大学 | Multiple-circular arc resonant cavity double-mode band-pass filter |
| CN204348872U (en) * | 2014-12-18 | 2015-05-20 | 黑龙江真美广播通讯器材有限公司 | A kind of circular patch filter |
| CN205846189U (en) * | 2016-05-13 | 2016-12-28 | 电子科技大学 | A kind of Tai Ji type resonator and the wave filter of composition thereof |
-
2016
- 2016-05-13 CN CN201610317669.2A patent/CN106058412B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201332134Y (en) * | 2009-01-09 | 2009-10-21 | 东南大学 | Multiple-circular arc resonant cavity double-mode band-pass filter |
| CN204348872U (en) * | 2014-12-18 | 2015-05-20 | 黑龙江真美广播通讯器材有限公司 | A kind of circular patch filter |
| CN205846189U (en) * | 2016-05-13 | 2016-12-28 | 电子科技大学 | A kind of Tai Ji type resonator and the wave filter of composition thereof |
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| CN106058412A (en) | 2016-10-26 |
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