CN106169636B - A kind of quasi- elliptic notch filter applied to radio astronomy - Google Patents
A kind of quasi- elliptic notch filter applied to radio astronomy Download PDFInfo
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- CN106169636B CN106169636B CN201610715256.XA CN201610715256A CN106169636B CN 106169636 B CN106169636 B CN 106169636B CN 201610715256 A CN201610715256 A CN 201610715256A CN 106169636 B CN106169636 B CN 106169636B
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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
- H01P1/2039—Galvanic coupling between Input/Output
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Abstract
The present invention provides a kind of quasi- elliptic notch filters applied to radio astronomy, including：Main transmission line, the first resonator, the second resonator, third resonator, the 4th resonator, input terminal and output end, and first resonator, second resonator, the third resonator are identical with the resonant frequency of the 4th resonator；It is provided with a cross-couplings mechanism between first resonator and the 4th resonator, so that first resonator is of coupled connections with the 4th resonator, generates a transmission zero respectively in the stopband both sides, and then the stopband has quasi- ellipse response.The quasi- elliptic notch filter of the present invention enhances stopband characteristic, and civil aviaton can be inhibited to communicate special frequency range and China Mobile GSM band downlink very well, has the characteristics that simple in structure, miniaturization, easy processing.
Description
Technical field
The present invention relates to technical field of micro communication, oval more specifically to a kind of standard applied to radio astronomy
Notch filter.
Background technology
With the fast development of communications industry, various communication standards exist simultaneously, and frequency spectrum resource becomes more and more nervous, right
For modern radio astronomy observation, radio frequency interference suppression technology becomes a kind of unprecedented technological challenge.And inhibit interference
One of method of frequency is that the trap filter of a high q-factor is inserted into before the low noise amplifier positioned at radio astronomical telescope front end
Wave device.
However, the stopband characteristic for the notch filter being currently located in radio astronomical telescope front end is poor, it can not be fine
Ground meets the requirement of radio astronomy observation, moreover, in radio astronomy observation, since the frequency range of inhibition is relatively low, for example, civil aviaton is logical
Believe special frequency range (1785-1805MHz) and China Mobile GSM band downlink (1805-1820MHz), the notch filter of use
Size, more stringent requirements are proposed for this integrated level to radio astronomical telescope front end.
Invention content
The technical problem to be solved in the present invention is, for deficiency in the prior art, provides based on right-hand man's zeroth order electricity
The high-temperature superconductor notch filter on road.
There is provided a kind of oval trap filters of standard applied to radio astronomy for technical proposal that the invention solves the above-mentioned problems
Wave device, including：
Main transmission line, the first resonator, the second resonator, third resonator, the 4th resonator, input terminal and output end,
And first resonator, second resonator, the third resonator are identical with the resonant frequency of the 4th resonator；
The input terminal and the output end are connect with the both ends of the main transmission line respectively, first resonator, institute
State the second resonator, the third resonator and the 4th resonator be successively set on the main transmission line side and with institute
Main transmission line slot-coupled is stated, with when the input terminal feed-in electromagnetic signal and the output end feed out electromagnetic signal, shape
At a stopband；
It is provided with a cross-couplings mechanism between first resonator and the 4th resonator, so that described first is humorous
The device that shakes is of coupled connections with the 4th resonator, generates a transmission zero respectively in the stopband both sides, and then the stopband has
There is quasi- ellipse response.
Wherein, the cross-couplings mechanism includes first from transmission line, second from transmission line and cochin structure, and described first
From transmission line with described second from the symmetrical setting of transmission line, the cochin structure setting is in described first from transmission line
One end and described second is between one end of transmission line.
Wherein, described first from the other end of transmission line with the first resonator slot-coupled in the main transmission line
Coupling part connects, described second from the other end of transmission line with the 4th resonator slot-coupled in the coupling of the main transmission line
Conjunction portion connects.
Wherein, the cochin structure includes first connecting portion, second connecting portion, the first cochin, the second cochin, third cochin
With the 4th cochin, the first connecting portion is connect with described first from one end of transmission line, the second connecting portion and described the
Two connect from one end of transmission line, and first cochin, the second cochin, third cochin and the 4th cochin are of coupled connections successively, and
First cochin and the second cochin are connect with the first connecting portion respectively, the third cochin and the 4th cochin difference
It is connect with the second connecting portion.
Wherein, described first from transmission line and described second from transmission line be the microstrip line continuously bent, and described
One from transmission line and described second from the electrical length of transmission line be 365 °.
Wherein, described first from transmission line and described second from transmission line includes first from transport part, second from transmission
Portion and for being connected to the described second continuous bending part from transport part, the continuous bending part from transport part by described first
Reduce by the described first size from transmission line on the described first direction from transport part.
Wherein, the main transmission line is the microstrip line of bending.
Wherein, the main transmission line includes the first main transport part, the second main transport part, the main transport part of third, the 4th main biography
Defeated portion and by the described first main transport part, the second main transport part, the main transport part of the third and the 4th main transmission
The first bending part, the second bending part and the third bending part that portion is connected with each other successively；First bending part and the third are curved
The symmetrical setting in folding part, second bending part are symmetrical.
Wherein, first resonator, second resonator, the third resonator and the 4th resonator are
Spiral resonator.
Wherein, the spiral resonator is formed by the identical half-wavelength uniform impedance microstrip line spiral of electrical length, described
First resonator, second resonator are identical with the hand of spiral of the third resonator, and the 4th resonator and institute
The hand of spiral for stating the first resonator, second resonator and the third resonator is opposite.
Beneficial effects of the present invention are：The quasi- elliptic notch filter of the present invention can be applied in radio astronomy observation, knot
Structure is simple；A transmission zero is generated respectively in stopband both sides by cross-couplings mechanism, enhances stopband characteristic, and then the resistance
Band has quasi- ellipse response, and civil aviaton can be inhibited to communicate special frequency range (1785-1805MHz) and China Mobile GSM downlink frequency very well
Section (1805-1820MHz).Meanwhile main transmission line and cross-couplings mechanism are all made of the mode of bending, and then reduce quasi- ellipse
The size of notch filter is realized miniaturization, and cross-couplings mechanism easy processing, is reduced the production cost, and processes simply, adopts
The size that quasi- elliptic notch filter is further decreased with spiral resonator is readily integrated to radio astronomical telescope front end.
In addition, quasi- elliptic notch filter is made using high-temperature superconductor dielectric material, loss is small, and Q values are high, and are applied to
It is long using stable and usage time in radio astronomy observation.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of quasi- elliptic notch filter applied to radio astronomy of the embodiment of the present invention.
Fig. 2 is the frequency response curve for the quasi- elliptic notch filter applied to radio astronomy being made in Fig. 1.
Fig. 3 is the frequency response curve for the quasi- elliptic notch filter applied to radio astronomy being made in Fig. 1
Enlarged drawing.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
As shown in Figure 1, being a kind of structure of quasi- elliptic notch filter applied to radio astronomy of the embodiment of the present invention
Schematic diagram, the quasi- elliptic notch filter is simple in structure, including main transmission line 100, the first resonator 10, the second resonator 20,
Third resonator 30, the 4th resonator 40, input terminal P1 and output end P2, and the first resonator 10, the second resonator 20, third
Resonator 30 is identical with the resonant frequency of the 4th resonator 40.In the present embodiment, the first resonator 10, the second resonator 20,
The resonant frequency of third resonator 30 and the 4th resonator 40 is 1.8GHz.
Input terminal P1 and output end P2 are connect with the both ends of main transmission line 100 respectively, and then input terminal output end is formed and taken out
The feeding classification of head coupling.
First resonator 10, the second resonator 20, third resonator 30 and the 4th resonator 40 are successively set on main transmission
The side of line 100 and with 100 slot-coupled of main transmission line, to feed out electricity in input terminal P1 feed-ins electromagnetic signal and output end P2
When magnetic signal, a stopband is formed.In the present embodiment, the centre frequency of stopband is 1.8GHz.First resonator 10, the second resonance
Device 20, third resonator 30 and the 4th resonator 40 generate coupling electricity by the coupling gap between main transmission line 100 respectively
Hold effect, and then form slot-coupled, between coupled characteristic be adjusted by coupling gap.Meanwhile first resonance
Device 10, the second resonator 20, third resonator 30 and the 4th resonator 40 successively between spacing on main transmission line 100 electricity
Length is 90 °, can effectively and more preferably adjust the first resonator 10, the second resonator 20, third resonator 30 and the 4th resonator
Coupled characteristic between 40 and main transmission line 100.For example, 10 slot-coupled of i.e. the first resonator is in main transmission line 100
The electrical length of coupling part and 20 slot-coupled of the second resonator between the coupling part of main transmission line 100 is 90 °, i.e. the first resonance
The electrical length of spacing between device 10 and the second resonator 20 on main transmission line 100 is 90 °.
It is provided with a cross-couplings mechanism 50 between first resonator 10 and the 4th resonator 40, so that the first resonator 10
It is of coupled connections with the 4th resonator 40, generates a transmission zero respectively in stopband both sides, and then stopband has quasi- ellipse response.
Further, with reference to figure 1, in the present embodiment, cross-couplings mechanism 50 include first from transmission line 51, second from
Transmission line 53 and cochin structure 52, first from transmission line 51 and second from 53 symmetrical setting of transmission line, cochin structure 52
First is set to from one end of transmission line 51 and second between one end of transmission line 53.If only with first from 51 He of transmission line
Second realizes the cross-couplings between the first resonator 10 and the 4th resonator 40 from transmission line 53, i.e., individually uses transmission line
It is coupled to realize, the line width needs of transmission line are sufficiently small, but line width is too small and can not process.And by cochin structure 52 come real
Existing coupling between first resonator 10 and the 4th resonator 40 can effectively reduce processing complexity, reduce cost of manufacture, processing
Simply.
Further, with reference to figure 1, cochin structure 52 includes first connecting portion 521, second connecting portion 522, the first cochin
523, the second cochin 524, third cochin 525 and the 4th cochin 526, first connecting portion 521 and first is from one end of transmission line 51
Connection, second connecting portion 522 are connect with second from one end of transmission line 53, the first cochin 523, the second cochin 524, third cochin
525 and the 4th cochin 526 be of coupled connections successively, and the first cochin 523 and the second cochin 524 are connect with first connecting portion 521,
Three cochins 525 are connect with the 4th cochin 526 with second connecting portion 522.In the present embodiment, it is handed over by the first cochin 523, second
Toe 524, third cochin 525 and the 4th cochin 526 are of coupled connections successively, and coupling gap is respectively labeled as d1, d2 and d3 successively,
Capacitive effect is generated by coupling gap d1, d2 and d3, to realize the coupling between the first resonator 10 and the 4th resonator 40
Connection is closed, and then a transmission zero is generated respectively in stopband both sides, and then stopband has quasi- ellipse response.Optionally, first connects
Socket part 521 and first from one end of transmission line 51 and second connecting portion 522 and second from one end vertical connection of transmission line 53,
First cochin 523 and the second cochin 524 respectively with 521 vertical connection of first connecting portion, third cochin 525 and the 4th cochin 526
Respectively with 522 vertical connection of second connecting portion, in other embodiments, other connection sides may be used in above-mentioned connection type
Formula, e.g., first connecting portion 521 are connect with first from one end of transmission line 51 at an angle.
Further, first from the other end and 10 slot-coupled of the first resonator of transmission line 51 in main transmission line 100
Coupling part connects, second from the other end and 40 slot-coupled of the 4th resonator of transmission line 53 in the coupling part of main transmission line 100
Connection.Further, with reference to figure 1, in the present embodiment, first from transmission line 51 and second from transmission line 53 be continuous bending
Microstrip line, and first from transmission line 51 and second from the electrical length of transmission line 53 be 365 °.Since first from 51 He of transmission line
Second from 52 symmetrical setting of transmission line, then its mode continuously bent is identical, and in the present embodiment, first from biography
Defeated line 51 and second from transmission line 52 include first from transport part 511, second from transport part 513 and for by first from biography
Defeated portion 511 is connected to the second continuous bending part 512 from transport part 513, and continuous bending part 512 reduces first and exists from transmission line 51
First size from the direction of transport part 511 realizes miniaturization so that the overall dimensions of quasi- notch filter are reduced.
Further, with reference to figure 1, in the present embodiment, main transmission line 100 is the microstrip line of bending.Main transmission line 100 wraps
It includes the first main transport part 101, the second main transport part 103, the main transport part 105 of third, the 4th main transport part 107 and is led first
Transport part 101, the second main transport part 103, main 105 and the 4th main transport part 107 of transport part of third be connected with each other successively first
Bending part 102, the second bending part 104 and third bending part 106；First bending part 102 and third bending part 106 are symmetrical
Setting, the second bending part 104 are symmetrical.In the present embodiment, since the first resonator 10, the second resonator 20, third are humorous
The electrical length of spacing between device 30 and the 4th resonator 40 shake successively on main transmission line 100 is 90 °, and the first resonator 10
And the second spacing between resonator 20 on the first main transport part 101 and the second main transport part 103 is negligible, then is equivalent to the
Spacing of one bending part 102 between the first resonator 10 and the second resonator 20 on main transmission line 100, i.e. the first bending part
102 electrical length is 90 °.
Further, with reference to figure 1, in the present embodiment, the first resonator 10, the second resonator 20, third resonator 30
It is spiral resonator with the 4th resonator 40, is further reduced the overall dimensions of quasi- notch filter, and then realize small-sized
Change.Further, spiral resonator is formed by half-wavelength uniform impedance microstrip line spiral, due to the first resonator 10, second
Resonator 20, the resonant frequency of third resonator 30 are identical, and therefore, the electrical length of half-wavelength uniform impedance microstrip line is identical.?
In the spiral resonator, one end of half-wavelength uniform impedance microstrip line is located in spiral, the other end is located at the outside of spiral, belongs to
In single-ended screw-in type, it is in clockwise direction and inverse time from outside to inside that direction of rotation, which is divided into along half-wavelength uniform impedance microstrip line,
Needle direction.Further, the first resonator 10, the second resonator 20 are identical with the hand of spiral of third resonator 30, and the 4th
The hand of spiral of resonator 40 and the first resonator 10, the second resonator 20 and third resonator 30 is on the contrary, can effectively be adjusted
Gap coupling between one resonator 10, the second resonator 20, third resonator 30 and the 4th resonator 40 and main transmission line 100
It closes, meanwhile, it can effectively and more preferably adjust the cross-couplings between the first resonator 10 and the 4th resonator 40.In the present embodiment
In, the first resonator 10, the second resonator 20 and third resonator 30 from outside to inside be in clockwise, the 4th resonator 40 from
Outer is in counterclockwise in.
Further, in the present embodiment, which is made using high-temperature superconductor dielectric material, into
And the loss of the quasi- elliptic notch filter is small, and Q values are high, being suitable for radio astronomy observes, long using stable and usage time,
Wherein, which is made a high-temperature superconductor medium substrate, dielectric constant 9.78 by magnesia, and thickness is
The upper and lower surface of 0.5mm, the high-temperature superconductor medium substrate are made of yttrium barium copper oxide superconducting film, and upper surface is etched by photoetching process
Go out above-mentioned quasi- elliptic notch filter.As shown in Fig. 2, using the oval notch filter of standard that high-temperature superconductor dielectric material is made
The centre frequency of the frequency response curve of device, stopband is 1.8GHz, as shown in figure 3, being the enlarged drawing of stopband, is generated in stopband
Four transmission zeros, are respectively labeled as 401,402,403 and 404, wherein the transmission zero 401 and 404 of stopband both sides is by handing over
It pitches coupling mechanism to generate, enhances stopband characteristic, and then stopband has quasi- ellipse response, civil aviaton can be inhibited to communicate special frequency very well
Section (1785-1805MHz) and China Mobile GSM band downlink (1805-1820MHz).
More than, it is merely preferred embodiments of the present invention, but scope of protection of the present invention is not limited thereto, it is any
Those familiar with the art in the technical scope disclosed by the present invention, all answer by the change or replacement that can be readily occurred in
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (5)
1. a kind of quasi- elliptic notch filter applied to radio astronomy, which is characterized in that including：
Main transmission line, the first resonator, the second resonator, third resonator, the 4th resonator, input terminal and output end, and institute
It is identical with the resonant frequency of the 4th resonator to state the first resonator, second resonator, the third resonator；
The input terminal and the output end are connect with the both ends of the main transmission line respectively, first resonator, described
Two resonators, the third resonator and the 4th resonator be successively set on the side of the main transmission line and with the master
Transmission line slot-coupled, when the input terminal feed-in electromagnetic signal and the output end feed out electromagnetic signal, to form one
Stopband；
It is provided with a cross-couplings mechanism between first resonator and the 4th resonator, so that first resonator
It is of coupled connections with the 4th resonator, generates a transmission zero respectively in the stopband both sides, and then the stopband has standard
Ellipse response；The cross-couplings mechanism includes first from transmission line, second from transmission line and cochin structure, and described first from biography
Defeated line is with described second from the symmetrical setting of transmission line, and the cochin structure setting is in described first from one end of transmission line
With described second between one end of transmission line；Described first other end from transmission line and the first resonator slot-coupled
It is connected to the coupling part of the main transmission line, described second connects from the other end of transmission line with the 4th resonator slot-coupled
It is connected to the coupling part of the main transmission line；The cochin structure includes first connecting portion, second connecting portion, the first cochin, second
Cochin, third cochin and the 4th cochin, the first connecting portion are connect with described first from one end of transmission line, and described second connects
Socket part is connect with described second from one end of transmission line, and first cochin, the second cochin, third cochin and the 4th cochin are successively
It is of coupled connections, and first cochin and the second cochin are connect with the first connecting portion respectively, the third cochin and described
4th cochin is connect with the second connecting portion respectively；
The main transmission line is the microstrip line of bending；The main transmission line includes the first main transport part, the second main transport part, third
Main transport part, the 4th main transport part and by the described first main transport part, the second main transport part, the main transport part of the third
The first bending part, the second bending part and the third bending part being connected with each other successively with the 4th main transport part；Described first is curved
Folding part and the symmetrical setting of third bending part, second bending part are symmetrical.
2. according to the quasi- elliptic notch filter applied to radio astronomy described in claim 1, which is characterized in that described
One from transmission line and described second from transmission line is the microstrip line continuously bent, and described first from transmission line and described second
It it is 365 ° from the electrical length of transmission line.
3. according to the quasi- elliptic notch filter applied to radio astronomy described in claim 2, which is characterized in that described
One includes first from transport part, second from transport part from transmission line and described second from transmission line and is used for described first
It is connected to the described second continuous bending part from transport part from transport part, the continuous bending part reduces described first from transmission line
Size on the described first direction from transport part.
4. according to the quasi- elliptic notch filter applied to radio astronomy described in claim 1, which is characterized in that described
One resonator, second resonator, the third resonator and the 4th resonator are spiral resonator.
5. according to the quasi- elliptic notch filter applied to radio astronomy described in claim 4, which is characterized in that the spiral shell
Rotation type resonator is formed by the identical half-wavelength uniform impedance microstrip line spiral of electrical length, first resonator, described second
Resonator is identical with the hand of spiral of the third resonator, and the 4th resonator and first resonator, described the
The hand of spiral of two resonators and the third resonator is opposite.
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| CN201610715256.XA CN106169636B (en) | 2016-08-24 | 2016-08-24 | A kind of quasi- elliptic notch filter applied to radio astronomy |
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| CN201610715256.XA CN106169636B (en) | 2016-08-24 | 2016-08-24 | A kind of quasi- elliptic notch filter applied to radio astronomy |
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| CN106169636B true CN106169636B (en) | 2018-11-06 |
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| CN2702454Y (en) * | 2004-04-05 | 2005-05-25 | 海泰超导通讯科技（天津）有限公司 | Crossover coupling type filter for wireless communication |
| CN201838691U (en) * | 2010-06-08 | 2011-05-18 | 天津海泰超导电子有限公司 | Double passband high temperature superconducting filter |
| CN102280677A (en) * | 2010-06-08 | 2011-12-14 | 天津海泰超导电子有限公司 | Dual-bandpass high-temperature superconducting filter |
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| CN2702454Y (en) * | 2004-04-05 | 2005-05-25 | 海泰超导通讯科技（天津）有限公司 | Crossover coupling type filter for wireless communication |
| CN201838691U (en) * | 2010-06-08 | 2011-05-18 | 天津海泰超导电子有限公司 | Double passband high temperature superconducting filter |
| CN102280677A (en) * | 2010-06-08 | 2011-12-14 | 天津海泰超导电子有限公司 | Dual-bandpass high-temperature superconducting filter |
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| 混合电磁耦合滤波器研究;欧阳霄;《中国优秀硕士学位论文全文数据库》;20130115;正文第3.5.1.1节 * |
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Effective date of registration: 20190820 Address after: 710048 Xianning West Road, Shaanxi, China, No. 28, No. Patentee after: Xi'an Jiaotong University Address before: 330013 Changbei Economic and Technological Development Zone, Nanchang City, Jiangxi Province, 808 Shuanggang Moving East Street Patentee before: East-China Communication Univ |