CN108808186A - A kind of four work device of reconfigurable microwave - Google Patents
A kind of four work device of reconfigurable microwave Download PDFInfo
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- CN108808186A CN108808186A CN201810916670.6A CN201810916670A CN108808186A CN 108808186 A CN108808186 A CN 108808186A CN 201810916670 A CN201810916670 A CN 201810916670A CN 108808186 A CN108808186 A CN 108808186A
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- resonator
- tunable filter
- feeder port
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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
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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
- H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
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Abstract
The invention discloses a kind of four work device of reconfigurable microwave, every channel of the four works device folds shape loading capacitance resonator using second order, and each channel is coupled by distributed couplings technology, without match circuit and can keep good matching properties and tunable characteristic.Exist between the second order resonator of the present invention and be electrically coupled and magnetic coupling, is conducive to outer generation transmission zero and improving the selectivity of stopband.Secondly, this folding shape resonator has incoming feeder very weak loading effect, improves the isolation between output port, there is good matching.Using slow wave resonator Wide stop bands and effectively inhibit the characteristic of higher mode, minimum passband uses slow wave folded form resonator to reduce the influence to other particularly up to frequency channel characteristics, is also beneficial to further decrease restructural four works device size.
Description
Technical field
The present invention relates to microwave device technology fields, and in particular to a kind of four work device of reconfigurable microwave.
Background technology
Multiplexer one broadband signal can be divided into several frequency channel signals device mobile communcations system is played and
Its important role.Previous multiplexer use substantially have the characteristics that high q-factor, low-loss cavity body structure, but can generally occupy
Larger volume and inconvenience is applied in reconfigurable system.With the fast development of current communication system, people are for restructural
The research of multiplexer is gradually risen, but only a small amount of at present based on the restructural duplexer of microstrip structure, can only be directed to simple
Two channels are adjusted, and cannot apply in wider traffic scene, non-for the research of the restructural multiplexer of multichannel
It is often few.
Invention content
In view of the foregoing deficiencies of prior art with deficiency, the purpose of the present invention is to provide a kind of four-way is restructural
Multiplexer folds shape loading capacitance resonator using second order per channel, each channel is coupling in one by distributed couplings technology
It rises, without match circuit and good matching properties and tunable characteristic can be kept.Restructural four works device proposed by the present invention is with letter
The loading effect and the good matching properties of holding of single efficient method Solving Multichannel, for grinding for remaining restructural multiplexer
Certain directive function is studied carefully.
The present invention is achieved through the following technical solutions：
A kind of four work device of reconfigurable microwave, including 1 incoming feeder port, the first output feeder port, the second output feedback
Line end mouth, third output feeder port, the 4th output feeder port, the first tunable filter, the second tunable filter, third can
Tunable filter and the 4th tunable filter；By first incoming feeder port, the first tunable filter and the first output feeder
Port constitutes first frequency channel, by second incoming feeder port, the second tunable filter and the second output feeder port
Second frequency channel is constituted, is made of third incoming feeder port, third tunable filter and third output feeder port
Third frequency channel constitutes the 4th by the 4th incoming feeder port, the 4th tunable filter and the 4th output feeder port
Frequency channel；Wherein, four tunable filters are second order folded form load variable capacitance resonator, and second order resonator is with right
The structure of title is coupled；First tunable filter is adopted using stepped electric impedance resonator, the described second-four tunable filter
With uniform type electric impedance resonator.
The present invention loads variable capacitance resonator using second order folded form, is coupled each channel by distributed couplings technology
Together, any match circuit need not be designed, the impedance matching of total port and each access, and input terminal are had effectively achieved
Mouth only needs suitably to adjust with the coefficient of coup per channel couples spacing, while further reducing the size of four work devices；First
Channel can effectively inhibit its higher order resonances pattern, so that stopband broadens using stepped electric impedance resonator.
It is preferred that the incoming feeder port is a long microstrip line, the described first-the four tunable filter passes through
The capacity coupled mode in gap is connected with incoming feeder port, and the first tunable filter and the second tunable filter are located at microstrip line
The same side of length direction, third tunable filter and the 4th tunable filter are located at the other side of microstrip line length direction.On
On the one hand required outer component can be reached by the coupling spacing of simple adjustment and incoming feeder port by stating design
On the other hand quality factor does not need any match circuit, design complexities further decrease and reduce occupancy size simultaneously.
It is preferred that be second order resonator per channel, adjustable, the then coefficient of coup and the outer component per channel is synchronized
Quality factor is determined by following formula：
In formula, M12For the coefficient of coup between second order resonator, FBW is the relative width of filter, Qe1And Qe2Respectively filter
The external sort factor of wave device input/output port, g0、g1、g2For the corresponding low-pass prototype component value of selected filter type.Root
The preliminary comprehensive outer component for obtaining the coefficient of coup and input/output port between resonator is carried out according to given performance of filter index
Quality factor reaches required parameter then by adjusting the coupling spacing between resonator and arriving at a distance from input/output port
Value.
It is preferred that first tunable filter is using the slow of second order step electric impedance resonator symmetrical coupled formation
Wave structure resonator, the described second-four tunable filter use the half-wave that second order uniformity electric impedance resonator symmetrical coupled is formed
Long structure resonator.Using slow-wave structure resonator, to make stopband broaden and reduce its higher order resonances pattern to other channels
Adverse effect.
It is preferred that in the first-fourth lane, second order resonator is symmetrical arranged by being folded into two
U-shaped structure, the first U-shaped structure one end is grounded by variable capacitance, and end where the variable capacitance is presented with corresponding output
Line end mouth is of coupled connections, and the first U-shaped structure other end is of coupled connections with second U-shaped structure one end, the other end of the second U-shaped structure
It is grounded by variable capacitance, and is of coupled connections with incoming feeder port.Above-mentioned design makes second order resonator with symmetrical structure
It is coupled, to be electrically coupled, it is magnetic coupling that two resonators, which load variable capacitance grounded part, for centre, selects suitable coupling spacing just
The required coefficient of coup can be reached, and there are transmission zeros to improve selectivity with outer.
It is preferred that the end that first U-shaped structure is coupled with the second U-shaped structure is connect by inductance and capacitance
Ground.
It is preferred that the variable capacitance uses varactor.Pass through change of the selection with larger variable compression ratio
Hold diode to reach broadband adjustable extent, while should also select that smaller high frequency substrate material is lost.
The present invention has the advantage that and advantageous effect：
The present invention uses distributed couplings technology, the form and incoming feeder that No. four tunable filters are passed through weak slot-coupled
Port is connected, and adopts this method, need not design any match circuit, to keep design quick and reduce the ruler of four work devices
It is very little.It is second order folded form load variable capacitance resonator per channel, exists between such second order resonator and be electrically coupled and magnetic coupling
It closes, is conducive to the outer selectivity for generating transmission zero and improving stopband.It is loaded by the every channel resonator of change variable
The capacitance of capacitance realizes the restructural characteristic of four work devices.Secondly, this shape resonator that folds has very weak add for incoming feeder
Effect is carried, the isolation between output port is improved, has good matching, be of very high actual application value.Using slow
The Wide stop bands of wave resonator and the characteristic for effectively inhibiting higher mode, minimum passband use slow wave folded form resonator to reduce to it
The influence of his particularly up to frequency channel characteristic, is also beneficial to further decrease restructural four works device size.Have by choosing
The big varactor of variable compression ratio is realized per the wider restructural range in channel.
Description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is four work device floor map of reconfigurable microwave of the present invention.
Fig. 2 is four work device structural schematic diagram of reconfigurable microwave of the present invention.
Fig. 3 is the initial results of four work device of reconfigurable microwave of the present invention.
Fig. 4 is the return loss and insertion loss during the only adjusting first passage of four work devices of the invention.
Fig. 5 is the isolation of four work devices of the invention only adjusted during first passage.
Fig. 6 is the return loss and insertion loss during the only adjusting second channel of four work devices of the invention.
Fig. 7 is the isolation of four work devices of the invention only adjusted during second channel.
Fig. 8 is the return loss and insertion loss during the only adjusting third channel of four work devices of the invention.
Fig. 9 is the isolation of four work devices of the invention only adjusted during third channel.
Figure 10 is the return loss and insertion loss during the only adjusting fourth lane of four work devices of the invention.
Figure 11 is the isolation of four work devices of the invention only adjusted during fourth lane.
Figure 12 is that four channels of four work devices of the invention lead to return loss and insertion loss in overshoot condition 1.
Figure 13 is that four channels of four work devices of the invention lead to return loss and insertion loss in overshoot condition 2.
Label and corresponding device name in attached drawing：
1- incoming feeders port, the first output feeders of 2- port, the second output feeders of 3- port, 4- third output feeders end
Mouthful, the 4th output feeder ports 5-, 6- first frequencies channel, 7- second frequencies channel, 8- third frequency channels, the 4th frequencies of 9-
Channel, 10- variable capacitances, 11- inductance, 12- capacitances, 13- ground terminals, 14- air chambers, 15- metal ground layers.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment
No. four tunable filters are passed through weak seam by the four work device of type reconfigurable microwave of this implementation using distributed couplings technology
The form of gap coupling is connected with incoming feeder port, adopts this method, need not design any match circuit, to make design
Size that is quick and reducing four work devices.It is second order folded form load variable capacitance resonator, such second order resonator per channel
Between exist and be electrically coupled and magnetic coupling, be conducive to outer generation transmission zero and improving the selectivity of stopband.Secondly, this folding
Folded shape resonator has incoming feeder very weak loading effect, improves the isolation between output port, there is good matching
Property, it is of very high actual application value.Wide stop bands using slow wave resonator and effective characteristic for inhibiting higher mode, most low pass
Band uses slow wave folded form resonator to reduce the influence to other particularly up to frequency channel characteristics, is also beneficial to further subtract
Small restructural four works device size.The varactor for having variable compression ratio big by selection is realized per the wider restructural model in channel
It encloses.
As shown in Figs. 1-2, the four work devices of the present embodiment include 1 incoming feeder port 1, the first output feeder port 2, the
Two output feeder ports 3, third output feeder port 4, the 4th output feeder port 5, the first tunable filter, the second adjustable filter
Wave device, third tunable filter and the 4th tunable filter；By first incoming feeder port, the first tunable filter and
One output feeder port constitutes first frequency channel 6, defeated by second incoming feeder port, the second tunable filter and second
Go out feeder line port and constitute second frequency channel 7, is exported and presented by third incoming feeder port, third tunable filter and third
Line end mouth constitutes third frequency channel 8, by the 4th incoming feeder port, the 4th tunable filter and the 4th output feeder end
Mouth constitutes the 4th frequency channel 9；Wherein, four tunable filters are that second order folded form loads variable capacitance resonator, and two
Rank resonator is coupled with symmetrical structure；For first tunable filter using stepped electric impedance resonator, described second can
Tunable filter, third tunable filter and the 4th tunable filter use uniform type electric impedance resonator.
First tunable filter uses the slow-wave structure resonator that second order step electric impedance resonator symmetrical coupled is formed,
First tunable filter using stepped electric impedance resonator, second tunable filter, third tunable filter and
4th tunable filter uses the half-wavelength structure resonator that second order uniformity electric impedance resonator symmetrical coupled is formed.
In the first frequency channel, second frequency channel, third frequency channel and the 4th frequency channel, second order resonance
By being folded into two symmetrically arranged U-shaped structures, the first U-shaped structure one end is grounded device by variable capacitance 10, and
End where the variable capacitance and the output feeder port of corresponding channel are of coupled connections, the first U-shaped structure other end and the second U-shaped knot
Structure one end is of coupled connections, and the other end of the second U-shaped structure is grounded by variable capacitance, and is of coupled connections with incoming feeder port.
The end that first U-shaped structure and the second U-shaped structure are coupled is grounded by inductance 11 and capacitance 12.
The slow-wave structure is using stepped electric impedance resonator, and this form can effectively inhibit its higher order resonances mould
Formula.And there are Wide stop bands with such resonator and easily constituted the characteristic of ultra-narrow bandwidth filter.
The distributed couplings technology, input port is longer section microstrip line, after each tunable filter is designed
It is indirectly connected with input port by the capacity coupled form in gap.It on the one hand can be between simple adjustment and the coupling of input port
Away from required external sort factor can be reached.On the other hand, any match circuit is not needed, design complexities are into one
Step reduces while reducing occupancy size.
The folding shape loading capacitance resonator, makes second order resonator be coupled with symmetrical structure, then intermediate is thermocouple
It closes, it is magnetic coupling that two resonators, which load variable capacitance grounded part,.The suitable coupling spacing of selection can reach required coupling
Collaboration number, and with it is outer there are transmission zero improve selectivity.
The channel one, i.e. low-limit frequency passband use second order slow-wave structure resonator, to make stopband broaden and reduce
Adverse effect of its higher mode to other passbands.To reduce design complexities, it is variable that rest channels are all made of equal half-wavelength load
Capacitance resonance machine, and the initial design centre frequency interval 400MHz between channel.Select the transfiguration with larger variable compression ratio
Diode to reach broadband adjustable extent should also select that smaller high frequency substrate material is lost.
Working principle of the present invention is as follows：The design of multiplexer always needs the design for being integrated into every path filter, right
Also it is such in restructural multiplexer.First by designing suitable reconfigurable filter, single filter is set to have wider
Adjustable extent, constant fixed percentage bandwidth has been likely to good characteristic to multiplexer.Secondly, for setting for filter
Key point is that the selection of resonator structure, different forms play deciding factor to the characteristic of filter for meter.Generally
For, the resonator of microstrip structure is mostly the form that electrical length is half-wavelength, can be roughly divided into uniform impedance resonator (UIR)
With step electric impedance resonator (SIR).The channel of the present invention is formed by slow wave resonator once use by SIR, and rest channels
It is all made of the form of UIR.After resonator form determination, it is necessary to the filter according to coupled resonant circuit Theoretical Design per channel
Wave device, including two major parameters：The coefficient of coup and external sort factor.
Normalized impedance matrix is mainly by coefficient of coup mij, external sort factor qeiAnd frequency transformation formula p tri-
It is grouped as.Therefore impedance matrix can be decomposed into：
[Z]=[q]+p [U]-j [m]
Wherein, [U] is n × n unit matrixs；[q] is also n × n matrix, and removes q11=1/qe1And qnn=1/qenOutside, other
Value is 0；The coupling matrix that [m] is just known as, and be a reciprocal network, therefore can be expressed as：
The resonant frequency of the case where coupling matrix listed above belongs to simultaneous tuning, i.e., each resonator are identical.The present invention
Every channel of restructural four works device is second order resonator, also adjustable to synchronize, then the coefficient of coup and external sort per channel
Factor can be determined by formula (1) and (2)：
In formula, M12For the coefficient of coup between second order resonator, FBW is the relative width of filter, Qe1And Qe2Respectively filter
The external sort factor of wave device input/output port, g0、g1、g2For the corresponding low-pass prototype component value of selected filter type.
Formula (1) and (2) may be used for the given preliminary synthesis of Filter specification progress and obtain the coupled systemes between resonator
Number and external sort factor reach institute then by adjusting the coupling spacing between resonator and arriving at a distance from input/output port
The parameter value needed.
After obtaining the coefficient of coup and external sort factor by resonance circuit theory, need true according to actual design requirement
Determine the physical arrangement and size of resonator.Four passband central frequencies of the restructural four works device initial designs of the present invention are scheduled on：
1.1GHz, 1.5GHz, 1.9GHz and 2.3GHz are spaced 400MHz.To ensure there is higher isolation between channel, transmission is introduced
Zero is the inevitable requirement of the present invention.Under normal circumstances, the filter with n rank resonators at most generates n-1 transmission zero,
And it is the mode of hybrid electromagnetic coupling that the design, which takes, i.e., exists simultaneously and be electrically coupled and magnetic coupling between second order resonator, is closed
The size of reason two kinds of couplings of control can be realized with outer pair of transmission zeros to improve frequency selectivity.Resonator is determined as folding class
U-shaped structure, above-mentioned requirement may be implemented in this, while reducing the size of four work devices.
When the design of every channel tunable filter finishes, the key Design point of multiplexer is the side that Jiang Silu combines
Formula.To ensure that four work devices can have wider frequency reconfigurable range, using distributed couplings technology, Ji Jiang No. tetra- tunable filters with
Capacity coupled form is connect with incoming feeder port.This effectively realizes the impedance matching of total port and each access, and
Input port only needs suitably to adjust with the coefficient of coup per channel couples spacing, while further reducing the ruler of four work devices
It is very little.
As shown in Fig. 3-13, the simulation result emulated to the four work device of reconfigurable microwave of the present embodiment can
Know：The four work device of reconfigurable microwave of the present embodiment, the centre frequency in each channel can be adjusted concurrently or separately, initial designs center
Frequency exists：1.1GHz, 1.5GHz, 1.9GHz and 2.3GHz, per passband adjustable frequency range>350MHz；From the figure 3, it may be seen that this reality
Applying has transmission zero outside the band of each channel in four work devices of example, first frequency channel has wider stopband；And Fig. 4-11 is
Individually adjust first passage, the return loss that second channel, third channel and fourth lane emulate, insertion loss with
And isolation does not influence the characteristic in other channels hardly when individually adjusting a certain channel；Figure 12-13 is to all channels
The return loss and insertion loss, isolation in each channel in the case of two kinds adjusted simultaneously are protected during entire adjust
Hold good port match and S11<-14dB；It can be seen that the four work device of reconfigurable microwave of the present embodiment, individually or simultaneously
Each channel influences smaller between each other when adjusting；And the insertion loss in four channels can keep small in entire adjustment process
Isolation in 1.8dB, and between output port is more than 30dB.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (7)
1. a kind of four work device of reconfigurable microwave, which is characterized in that including 1 incoming feeder port, the first output feeder port,
Two output feeder ports, third output feeder port, the 4th output feeder port, the first tunable filter, the second adjustable filtering
Device, third tunable filter and the 4th tunable filter；By first incoming feeder port, the first tunable filter and first
Output feeder port constitutes first frequency channel, by second incoming feeder port, the second tunable filter and the second output
Feeder line port constitutes second frequency channel, by third incoming feeder port, third tunable filter and third output feeder
Port constitutes third frequency channel, by the 4th incoming feeder port, the 4th tunable filter and the 4th output feeder port
Constitute the 4th frequency channel；Wherein, four tunable filters are second order folded form load variable capacitance resonator, and second order is humorous
The device that shakes is coupled with symmetrical structure；For first tunable filter using stepped electric impedance resonator, described second-four is adjustable
Filter uses uniform type electric impedance resonator.
2. four work device of a kind of reconfigurable microwave according to claim 1, which is characterized in that the incoming feeder port is one
Long microstrip line, the described first-the four tunable filter are connected by the capacity coupled mode in gap with incoming feeder port, and first
Tunable filter and the second tunable filter are located at the same side of microstrip line length direction, third tunable filter and the 4th adjustable
Filter is located at the other side of microstrip line length direction.
3. four work device of a kind of reconfigurable microwave according to claim 1, which is characterized in that every channel is second order resonance
Device, synchronizes adjustable, then is determined by following formula with external sort factor per the coefficient of coup in channel：
In formula, M12For the coefficient of coup between second order resonator, FBW is the relative width of filter, Qe1And Qe2Respectively filter
The external sort factor of input/output port, g0、g1、g2For the corresponding low-pass prototype component value of selected filter type.
4. according to a kind of four work device of reconfigurable microwave of claim 1-3 any one of them, which is characterized in that described first is adjustable
Filter uses the slow-wave structure resonator that second order step electric impedance resonator symmetrical coupled is formed, the described second-four adjustable filtering
Device uses the half-wavelength structure resonator that second order uniformity electric impedance resonator symmetrical coupled is formed.
5. four work device of a kind of reconfigurable microwave according to claim 4, which is characterized in that in the first-fourth lane,
By being folded into two symmetrically arranged U-shaped structures, the first U-shaped structure one end is connect second order resonator by variable capacitance
Ground, and end where the variable capacitance is of coupled connections with corresponding output feeder port, the first U-shaped structure other end and second U-shaped
Structure one end is of coupled connections, and the other end of the second U-shaped structure is grounded by variable capacitance, and couples company with incoming feeder port
It connects.
6. four work device of a kind of reconfigurable microwave according to claim 5, which is characterized in that first U-shaped structure and
The end that two U-shaped structures are coupled is by inductance and capacity earth.
7. four work device of a kind of reconfigurable microwave according to claim 5, which is characterized in that the variable capacitance uses transfiguration
Diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810916670.6A CN108808186B (en) | 2018-08-13 | 2018-08-13 | Reconfigurable microwave quadruplex device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810916670.6A CN108808186B (en) | 2018-08-13 | 2018-08-13 | Reconfigurable microwave quadruplex device |
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| Publication Number | Publication Date |
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| CN108808186A true CN108808186A (en) | 2018-11-13 |
| CN108808186B CN108808186B (en) | 2020-02-14 |
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| CN201810916670.6A Expired - Fee Related CN108808186B (en) | 2018-08-13 | 2018-08-13 | Reconfigurable microwave quadruplex device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011015A (en) * | 2019-03-01 | 2019-07-12 | 电子科技大学 | A kind of frequency and bandwidth reconfigurable microwave triplexer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0938153A1 (en) * | 1998-02-24 | 1999-08-25 | Murata Manufacturing Co., Ltd. | Bandpass filter, duplexer , high-frequency module and communications device |
| CN103811833A (en) * | 2014-02-20 | 2014-05-21 | 南京航空航天大学 | High isolation slot line duplexer applied to ultra-wideband channel and narrow-band channel |
| CN105789740A (en) * | 2016-04-22 | 2016-07-20 | 南京理工大学 | Adjustable duplexer based on folded open-loop resonators |
-
2018
- 2018-08-13 CN CN201810916670.6A patent/CN108808186B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0938153A1 (en) * | 1998-02-24 | 1999-08-25 | Murata Manufacturing Co., Ltd. | Bandpass filter, duplexer , high-frequency module and communications device |
| CN103811833A (en) * | 2014-02-20 | 2014-05-21 | 南京航空航天大学 | High isolation slot line duplexer applied to ultra-wideband channel and narrow-band channel |
| CN105789740A (en) * | 2016-04-22 | 2016-07-20 | 南京理工大学 | Adjustable duplexer based on folded open-loop resonators |
Non-Patent Citations (1)
| Title |
|---|
| 张科: "基于多模谐振器的小型化滤波器和多工器设计", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011015A (en) * | 2019-03-01 | 2019-07-12 | 电子科技大学 | A kind of frequency and bandwidth reconfigurable microwave triplexer |
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