CN108493566A - A kind of restructural filtering type power splitter of Wide stop bands based on SIR and DGS structures - Google Patents
A kind of restructural filtering type power splitter of Wide stop bands based on SIR and DGS structures Download PDFInfo
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- CN108493566A CN108493566A CN201810350531.1A CN201810350531A CN108493566A CN 108493566 A CN108493566 A CN 108493566A CN 201810350531 A CN201810350531 A CN 201810350531A CN 108493566 A CN108493566 A CN 108493566A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
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Abstract
The invention discloses a kind of restructural filtering type power splitters of Wide stop bands based on SIR and DGS structures, SIR and DGS structures are arranged on common power splitter.AC signal all the way into power splitter is divided into two-way, after being transferred to the processing of two SIR resonators by two SIR T-type branches respectively, the purpose that can realize filtering harmonics, adjust frequency and bandwidth；It is provided with the isolation resistance that two paths of signals is isolated after SIR T-type branches, prevents two paths of signals from being coupled in transmission process；The present invention is provided with defect ground structure (DGS) on grounding plate, and the power splitter can be made to have broadband group characteristic；The present invention extends the service band range of power splitter, and realizes the function of filtering and Wide stop bands, meets rigors of the Modern Communication System to power splitter.
Description
【Technical field】
The invention belongs to field of electronic devices, are related to a kind of restructural filtering type work(of the Wide stop bands based on SIR and DGS structures
Point device can be used for communicating, the wireless communication systems such as radar.
【Background technology】
With the rapid development of RF/Microwave Integrated Circuits, the integrated of device, miniaturization, multi-frequency Characteristic are required increasingly
It is high.Therefore the research and design of restructural (frequency, bandwidth etc. the are restructural) power splitter of integrating filtering function are increasingly by people
Attention.Power splitter is a kind of can an input signal to be distributed to two or more output ports according to a certain percentage
Microwave device, function are to realize the power distribution of signal.Multi-functional power splitter has many ways of realization, such as：Integrated filter
The power splitter of wave energy, the power splitter with frequency/bandwidth reconfigurable function, restructural power splitter of integrating filtering function etc.,
The application that the power splitter of different ways of realization has its different, wherein since RF/Microwave Integrated Circuits are to integrated, multifrequency microwave
The demand of device is increasing, and there is filtering, the multi-functional power splitter of reconfigurable function to receive people's favor.
Traditional power splitter only has the function of power distribution, and can only be in the fixed single frequency operation of frequency band, and application has very
Big limitation.It is more and more to the multifunction demand of microwave device with the fast development of RF/Microwave technology, system
Single-frequency is not content with to the transmission of signal, the requirement of frequency selectivity is also increasingly harsh, now only power dividing function, and only
It is integrated that power splitter suitable for single-frequency characteristic far can not meet Modern Communication System, wide harmonic responses,
The demand of frequency reconfigurable.
【Invention content】
It is an object of the invention to for current power splitter, there are frequency bands to fix, filtering performance and harmonic wave rejection are poor
The problem of, provide a kind of restructural filtering type of Wide stop bands being based on step impedance resonator (SIR) and defect ground structure (DGS)
Power splitter, the purpose for realizing filtering after the power splitter processing of AC signal through the invention, adjusting frequency and bandwidth, the work(point
Device has broadband group characteristic simultaneously.
In order to achieve the above objectives, the present invention is achieved by the following scheme：
A kind of restructural filtering type power splitter of Wide stop bands based on SIR and DGS structures, including microstrip dielectric substrate, micro-strip
Medium substrate upper surface is provided with input microstrip line；Signal enters power splitter by inputting microstrip line, by the first capacitance
CD1It is transmitted to branch, signal is divided into two branches in branch, and each branch road is both provided with identical electronic component and micro-
Band line；Pass through SIR-T types branch, transmission microstrip line and third capacitance C successively per signal all the wayD3, finally micro- from exporting
Band line exports power splitter, and wherein SIR-T types branch road, which is provided with, is filtered SIR resonators, and SIR resonators are also associated with adjustment
The varactor of frequency and bandwidth；The isolation electricity of anti-stop signal coupling is provided between two branches after SIR-T type branches
Hinder R；The DC power supply structure that direct current signal is provided to SIR resonator varactors is provided in microstrip dielectric substrate；
Microstrip dielectric substrate lower surface is provided with grounding plate, is offered on grounding plate and realizes lacking for band-stop response
Fall into ground structure.
Further improvement of the present invention is：
Each described SIR-T type branch includes transmission line L71, transmission line L72, transmission line L73, transmission line L74And transmission line
L75；Signal passes through transmission line L successively by a branch of branch71, transmission line L72, transmission line L73With transmission line L74, finally by
Transmission line L75It is sent to transmission microstrip line；Wherein transmission line L73It is the minor matters transmission line of SIR-T type branches, signal is via transmission
Line L73SIR resonators are reached, signal is after treatment by L73Return to SIR-T type branches.
The transmission line L71With transmission line L75It is low-impedance line, transmission line L72, transmission line L73With transmission line L74It is high resistant
Anti- line.
The SIR resonators are open loop structure, include the transmission line L of connection81With transmission line L84, the two junction it is outer
Side is connected with the minor matters transmission line of SIR-T type branches；Transmission line L81Beginning and transmission line L84Terminal connection, transmission line L81
Terminal and transmission line L82Beginning connection, transmission line L82Terminal be connected with the second capacitance CD2, the second capacitance CD2
Terminal connect grounding plate；Transmission line L84Beginning and transmission line L83Terminal connection, transmission line L83Beginning and first become
Hold diode Cv1Cathode connection, the first varactor Cv1Anode connect grounding plate；Transmission line L84With transmission line L81Even
Meet inside and the second varactor C at placev2Cathode connection, the second varactor Cv2Anode connect grounding plate.
The signal input part of the branch offers non-metallic via, and DC power supply structure will by non-metallic via
Direct current signal is transferred to two SIR-T type branches, and then is transferred to two the first varactor Cv1With two the second transfigurations two
Pole pipe Cv2。
The DC power supply structure is mounted in defect ground structure；DC power supply structure includes DC power supply VCV, direct current
Source VCVIt is connected with current-limiting resistance R1, current-limiting resistance R1It is connected with conducting wire, conducting wire is connected across non-metallic via with branch；Direct current
Power supply VCVIt is connected with the 4th capacitance C simultaneouslyD4, the 4th capacitance CD4Another termination grounding plate.
The defect ground structure includes a rectangular configuration and the identical round dumbbell structure of three structures；Each is round
Dumbbell structure includes the rectangular channel of two round dumbbells and the round dumbbell of connection two；Three round dumbbell structures are inputting respectively
Under microstrip line and two output microstrip lines；Rectangular configuration is under two SIR-T type branches.
The circular radius R of the circle dumbbell11, rectangular channel length L111With width W111It can be carried out according to use demand
Adjustment
Compared with prior art, the invention has the advantages that：
The invention discloses a kind of restructural filtering type power splitters of Wide stop bands based on SIR and DGS structures, in common work(point
SIR and DGS structures are set on device.AC signal all the way into power splitter is divided into two-way, passes through two SIR-T type branches respectively
Be transferred to two SIR resonators and varactor processing after, can realize filtering harmonics, adjust frequency and bandwidth purpose；
It is provided with the isolation resistance that two paths of signals is isolated after SIR-T type branches, prevents two paths of signals from being carried out in transmission process
Coupling；The present invention is provided with defect ground structure (DGS) on grounding plate can make the power splitter have broadband group characteristic；This
Invention extends the service band range of power splitter, and realizes the function of filtering and Wide stop bands, meets Modern Communication System to work(
Divide the rigors of device.
Further, the present invention is provided with SIR-T type branches in signal transmission path, which is equivalent to
The quarter-wave transmission line of traditional Wilkinson power splitters, its beginning and terminal are separately connected the input of the power splitter
Port and output port, for input signal is transferred to output signal；The other end connection SIR of its intermediate T-type minor matters is humorous
Shake device, for the adjustable function of filtering and frequency of realizing the power splitter.
Further, the L of SIR-T types branch of the present invention72、L73And L74Transmission line be high impedance line, L71And L75It is low
Impedance line so that the power splitter can preferably inhibit harmonic wave, reduce the interference of spuious harmonic wave.
Further, there are one the second capacitance C for setting in each SIR resonator of the inventionD2, transmission line L81、
Transmission line L82With capacitance CD1The step impedance resonator for constituting terminal loads short circuit capacitance, by the length for adjusting transmission line
Degree and width achieve the purpose that the stray resonance frequency for making resonator far from fundamental resonance frequency, so as to realize preferably
Harmonics restraint；Transmission line L83, transmission line L84With varactor Cv1Constitute the Stepped Impedance resonance of terminal loads varactor
Device, by changing load in the first varactor Cv1With the second varactor Cv2The size of upper DC voltage, thus it is possible to vary
The equivalent capacity of varactor, to realize the purpose of the centre frequency and bandwidth that change the power splitter.
Further, DC power supply of the invention is arranged at the back side of microstrip dielectric substrate, will by non-metallic via
Direct current signal is transferred in varactor；By adjusting direct current signal, the transfiguration of two SIR resonators connection can be adjusted simultaneously
Diode realizes the centre frequency and bandwidth for adjusting frequency band, and the frequency for solving traditional power splitter is single, filtering type energy and harmonic wave
The disadvantage of rejection difference.
Further, DC power supply structure of the invention is arranged in defect ground structure, since DC power supply structure occupies
Micro-strip square area very little, have little influence on the function that rectangle defect sturcture completes its bandpass filter so that the power splitter
It is more compact, beautiful, while simplifying design；Direct current signal can be sent to four transfigurations two by the DC power supply structure simultaneously simultaneously
Pole pipe improves work efficiency.
Further, defect ground structure of the invention is opened in the back side of microstrip dielectric substrate, including three structures are identical
Round dumbbell structure and a rectangular configuration, three round dumbbell structures can be equivalent to low-pass filter, rectangular configuration can
To be equivalent to bandpass filter.
Further, the round dumbbell of round dumbbell structure of the invention is equivalent to inductance, with the increase of radius, work(point
The frequency of transmission zero corresponding to device can decrease, and the rectangular channel among two circular configurations is equivalent to capacitance, with square
The increase of shape slot length, the frequency that power splitter corresponds to transmission zero can decrease, but with the increase of width of rectangular, work(
Divide the frequency of the corresponding transmission zero of device that can increase therewith.
【Description of the drawings】
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the superstructure schematic diagram of the present invention；
Fig. 3 is the understructure schematic diagram of the present invention；
Fig. 4 is the equivalent circuit diagram of the micro-strip defect sturcture of the present invention；
Fig. 5 be the present invention input return loss (| S11| (dB)) measured drawing；
Fig. 6 be the present invention insertion loss (| S21| (dB)) measured drawing；
Fig. 7 be the present invention insertion loss (| S31| (dB)) measured drawing；
Fig. 8 be the present invention two output ports between isolation (| S23| (dB)) measured drawing；
Fig. 9 be the present invention output return loss (| S22| (dB)) measured drawing；
Figure 10 be the present invention output return loss (| S33| (dB)) measured drawing；
Figure 11 be the present invention with broad stop-band insertion loss (| S21| (dB)) measured drawing；
Figure 12 be the present invention with broad stop-band insertion loss (| S31| (dB)) measured drawing；
Figure 13 is the measured drawing of the relative bandwidth within the scope of adjustable frequency and insertion loss of the present invention.
Wherein：1- microstrip dielectric substrates；2- grounding plates；The non-metallic vias of 5-；6- branches；7-SIR-T type branches；
8-SIR resonators；10- transmits microstrip line；11- defect ground structures；12- DC power supply structures；3-1- inputs microstrip line；3-2-
One output microstrip line；3-3- second exports microstrip line；The first dumbbell structures of 11-1-；The second dumbbell structures of 11-2-；11-3- thirds
Dumbbell structure；11-4- rectangular configurations；11-5- circle dumbbells；11-6 rectangular channels.
【Specific implementation mode】
The present invention is described in further detail below in conjunction with the accompanying drawings：
Referring to Fig. 1, power splitter of the invention includes microstrip dielectric substrate 1, and 1 bottom surface of microstrip dielectric substrate is provided with ground connection gold
Belong to plate 2, offers defect ground structure 11 on grounding plate 2, DC power supply structure 12 is installed in defect ground structure 11；Micro-strip
The upper surface of medium substrate 1 be provided with microstrip line at input/output end port, isolation element, non-metallic via 5, branch 6,
SIR-T types branch 7, SIR resonators 8, controlled member and transmission microstrip line 10.
The left end of 1 upper surface of microstrip dielectric substrate is provided with input microstrip line 3-1, the signal input of input microstrip line 3-1
End is provided with signal input port P1, the terminal of input microstrip line 3-1 and the signal input part of branch 6 pass through the first capacitance
CD1It connects, non-metallic via 5 is offered at the signal input part of branch 6；Signal transmission on 1 upper surface of microstrip dielectric substrate
Path is divided into that path is identical since branch 6, the two-way of symmetrical configuration.The signal output end of branch 6 is divided into two-way up and down, each
Road is connected with 7 signal input part of SIR-T types branch, and the minor matters of SIR-T types branch 7 are connected there are one SIR resonators 8,
The signal output end of SIR-T types branch 7 and a transmission microstrip line 10 connect, and transmit the signal output end and first of microstrip line 10
Output microstrip line 3-2 passes through third capacitance CD3Connection, the first output microstrip line 3-2 are provided with signal output end P2；Branch 6
Another way signal is exported to the signal output port P of the second output microstrip line 3-3 by identical electronic component3；This two
SIR-T types branch 7, SIR resonators 8, transmission microstrip line 10, the third capacitance C of roadD3With output microstrip line with respect to work(point
The horizontal median axis of device is symmetrical above and below.
1 lower surface of microstrip dielectric substrate is provided with grounding plate 2, and defect ground structure 11 is offered on grounding plate 2,
Defect ground structure 11 includes being leaned in the identical round dumbbell structure of three structures and a rectangular configuration 11-4, rectangular configuration 11-4
The side of nearly signal input part is provided with DC power supply structure 12, and DC power supply structure 12 is by non-metallic via 5 by direct current
Signal transmits SIR-T types branch 7, and then is transferred to the first varactor C connected in SIR resonatorsv1With the second transfiguration two
Pole pipe Cv2In.
Microstrip dielectric substrate 1, preferred material is F4B, relative dielectric constant 2.65, medium substrate in the present embodiment
Thickness be 1mm.
Grounding plate 2 is paved with the back side of entire microstrip dielectric substrate 1, material selection copper sheet, in the present embodiment preferably
Thickness is the copper sheet of 35um.
Referring to Fig. 1 and Fig. 2, isolation element includes the first capacitance CD1, two the second capacitance CD2, two thirds
Capacitance CD3With isolation resistance R；First capacitance CD1In the connection of input microstrip line 3-1 and 6 signal input part of branch
Place, to signal input port P1DC isolation, the first capacitance C in the present embodimentD1Capacitance be preferably 10pF；Second blocking
Capacitance CD2It is located at the left side terminal of two SIR resonators 8, the load in resonator 8 is isolated in the first varactor
Cv1With the second varactor Cv2Direct current signal, ensure the normal work of SIR resonators 8, in the present embodiment two second every
Straight capacitance CD2It is accommodating preferably 100nF；Two third capacitance CD3Microstrip line and transmission microstrip line are exported at two respectively
The junction of 10 branches, with to output port P2And P3DC isolation is carried out, two third capacitance C in the present embodimentD3's
Capacitance is preferably 10pF；Between isolation resistance R transmits microstrip line 10 at two, output port P is isolated2And P3, reduce signal and exist
Output port P2With output port P3Between coupling, the resistance value of isolation resistance is preferably 100 Ω in the present embodiment.
Controlled member includes identical two the first varactor C of structurev1With two the second varactor Cv2, often
There are one the first varactor C for connection on one SIR resonator 8v1With a second varactor Cv2；First transfiguration two
Pole pipe Cv1Cathode and transmission line L83Beginning be connected, anode by metallization VIA connects grounding plate 2, Cv2Cathode and
Transmission line L84With transmission line L81Junction on the inside of connection, Cv2Anode grounding plate 2 connect by metallization VIA.Pass through
DC voltage of the load on two varactors is adjusted, the equivalent capacity of varactor can be adjusted, and then adjust this
The centre frequency of invention power splitter and broadband；Four varactors of two SIR resonators connection share one and pass through non-gold
Categoryization via 5 transmits direct current signal.
Referring to Fig. 1 and Fig. 2, the microstrip line at input/output end port includes input microstrip line 3-1, the first output microstrip line
The signal input port of 3-2 and second output microstrip line 3-3, input microstrip line 3-1 are P1, the signal of input microstrip line 3-1 is defeated
The signal input part of outlet and branch 6 passes through the first capacitance CD1Connection；The signal input part of first output microstrip line 3-2 and
One transmission microstrip line 10 passes through third capacitance CD3Connection, signal output end P2Output port；Second output microstrip line
The signal input part of 3-3 and a transmission microstrip line 10 pass through another third capacitance CD3Connection, signal output end P3
Output port.
The signal input part of branch 6 is connected with the signal output end of input microstrip line 3-1, on the signal input part of branch 6
It is provided with non-metallic via 5, non-metallic via 5 is that the direct current signal that DC power supply structure 12 is sent out is transferred to branch 6
On medium.The signal output end of branch 6 is divided into two branches, respectively with the left side transmission line of about 7 two-way of SIR-T types branch
L71Beginning connection；Signal is flowed into input port P by branch 61The signal at place is divided into the identical signal of two-way up and down, defeated
Go out to the two-way up and down of SIR-T types branch 7, realizes power of the power splitter etc. point function.
Referring to Fig. 2, SIR-T types branch 7, including structure are identical, the opposite symmetrical upper branch of power splitter horizontal centre and
Lower branch, there are one SIR-T structures for each branch setting；Each SIR-T structure includes transmission line L71, transmission line L72, transmission
Line L73, transmission line L74And transmission line L75；Transmission line L73It is the minor matters of SIR-T types, transmission line L71And L72And transmission line L74With
Transmission line L75With transmission line L73Vertical center be symmetry axis constitute a pair of SIR structural transmission lines；Transmission line L73First end it is same
When and transmission line L72With transmission line L74Connection, second end and SIR resonators 8 connect；Transmission line L73The transmission line of first end left end
L72With transmission line L71Terminal connection, transmission line L71Beginning connected with the terminal of branch 6；Transmission line L73First end right end
Transmission line L72With transmission line L74Beginning connection, transmission line L74Terminal connected with the beginning of process transmission line 10；Transmission line L73
The other end and SIR resonators 8 transmission line L84With transmission line L81Joining place on the outside of connect.Transmission line L71Length and
Transmission line L75Equal length, transmission line L72Length and transmission line L74Equal length.Transmission line L72, transmission line L73And biography
Defeated line L74It is the identical high impedance line of line width, transmission line L71With transmission line L75It is the identical low-impedance line of line width.
Referring to Fig. 2, SIR resonators 8 include transmission line L81, transmission line L82, transmission line L83With transmission line L84；Transmission line L81
Beginning and transmission line L84The transmission line L in the outside and the roads SIR-T Xing Zhi of terminal joint73Connection；Transmission line L81Terminal with
Transmission line L82Beginning connection, transmission line L82Terminal connection capacitance CD2, capacitance CD2The other end pass through metallization
Via connects grounding plate 2；Transmission line L81, transmission line L82With capacitance CD1Constitute the step resistance of terminal loads short circuit capacitance
Antiresonance device (SIR resonators).
Transmission line L83Beginning and the first varactor Cv1Cathode be connected, varactor Cv1Anode pass through gold
Categoryization via connects grounding plate 2；Transmission line L83Terminal and transmission line L84Beginning connection, transmission line L84With transmission line L81
The inside of junction and the second varactor Cv2Cathode be connected, the second varactor Cv2Anode by metallizing
Hole connects grounding plate 2.Transmission line L83, transmission line L84With the first varactor Cv1With the second varactor Cv2It constitutes eventually
The step impedance resonator (SIR resonators) of end load varactor.
The length of preferred transmission line and width are respectively in the present embodiment：L81=L84=15.6mm, L82=L83=
10.6mm W81=W84=3mm, W82=W83=1mm；First capacitance CD1Capacitance be preferably 100nF, two pole of the first transfiguration
Pipe Cv1With the second varactor Cv2Model be Skyworks:SMV1281, DC voltage range 20-5V, capacitance can
Execute ranging from 0.7-2.7pF.
Referring to Fig. 3, defect ground structure 11 is located on grounding plate 2, including the identical round dumbbell structure of three structures
With a rectangular configuration 11-4, each round dumbbell structure includes two circle dumbbell 11-5 and the round dumbbell of connection two
Rectangular channel 11-6；For first dumbbell structure 11-1 in the case where inputting microstrip line 3-1, the second dumbbell structure 11-2 exports microstrip line first
Under 3-2, third dumbbell structure 11-3 is at third output microstrip line 3-3；Rectangular configuration 11-4 is in SIR-T type branch symmetrical above and below
Under road 7；Three round dumbbell structures can be equivalent to low-pass filter, wherein the circular radius R of round dumbbell 11-511It can be with
It is equivalent to inductance, with the increase of radius, the frequency of the transmission zero corresponding to filter can decrease, two circular configurations
Intermediate rectangular channel 11-6 can be equivalent to capacitance, with rectangular channel 11-6 length L111Increase, the transmission corresponding to filter
The frequency of zero can decrease, still, with rectangular channel 11-6 width W111Increase, the transmission zero corresponding to filter
Frequency can increase therewith；The micro-strip defect sturcture of intermediate rectangular configuration can be equivalent to bandpass filter.
Referring to the equivalent circuit that Fig. 4 is defect ground structure 11 with reference to figure, comparison diagram 4 is it can be found that the defect ground structure 11
Present the wide band-stop response of micro-strip defect sturcture.
Referring to Fig. 1 and Fig. 3, DC power supply structure 12 includes current-limiting resistance R1, the 4th capacitance CD4With DC power supply VCV。
DC power supply VCVOutput end and current-limiting resistance R1Input terminal connection, the output end of current-limiting resistance R connects with conducting wire, and conducting wire is worn
It is connected to branch 6 after crossing non-metallic via 5, the branch of branch 6 is connected to the branch of two SIR-T types branches 7 respectively；Direct current
Power supply VCVOutput end while and the 4th capacitance CD4Connection, the 4th capacitance CD4The other end and grounding plate 2 connect
It connects, with isolated DC signal.DC power supply structure 12 is arranged in rectangle defect sturcture close to signal input part by the power splitter
Side have little influence on rectangle defect sturcture on the one hand due to the micro-strip square area very little for welding and complete its band logical
On the other hand direct current signal only can be sent to four two poles of transfiguration by the function of filter by non-metallic via 5
Pipe.Therefore this structure can not only make the power splitter more compact, beautiful, but also simplify design, improve work efficiency.
The course of work of signal transmission of the present invention and power splitter：
(1) AC signal is from input port P1Into on input microstrip line 3-1, by the first capacitance CD1With it is nonmetallic
Change via 5 and reach branch 6, AC signal is divided into two-way up and down in equal size in branch 6, passes through a SIR- per signal all the way
T-type branch 7 is transferred to SIR resonators 8；
(2) by adjusting transmission line L in SIR resonators 881And L82The ratio of length and width, reaching makes the miscellaneous of resonator
Resonant frequency is dissipated far from fundamental resonance frequency purpose, so as to realize harmonics restraint, the second capacitance CD2Add with isolation
It is loaded in the first varactor Cv1With the second varactor Cv2Direct current signal effect, avoid SIR resonators 8 short-circuit；It is logical
Change load is crossed in the first varactor Cv1With the second varactor Cv2The size of upper DC voltage, thus it is possible to vary transfiguration
The equivalent capacity of diode, therefore may be implemented to change the centre frequency of the power splitter and the purpose of bandwidth；Load becomes first
Hold diode Cv1With the second varactor Cv2Voltage value be consistent, the appearance of their equivalent capacity can be changed simultaneously
It is worth size, therefore the power splitter can have the function of adjusting frequency and bandwidth simultaneously while realizing filter function.Exchange
After signal completes the effect of filtering, adjusting frequency and bandwidth by SIR resonators 8 and varactor, it is transmitted back to SIR-T type branch
Road 7；
(3) L of the signal from SIR-T types branch 775It is transferred to transmission microstrip line 10, two paths of signals is avoided because of isolation resistance R
The coupling of signal, while passing through two third blocking resistance C respectivelyD3, it is transferred to output microstrip line, finally respectively from output port
P2With output port P3Export power splitter；
(4) AC signal is during transmission and processing, three round dumbbell structures of defect ground structure 11 and one
Rectangular configuration realizes the function of filter.
Further to verify the effect of power splitter of the present invention, a series of compliance test results have been carried out to the power splitter.
Content 1 is surveyed, by vector network analyzer Agilent N5230A to the present invention based on SIR and DGS structures
The input return loss of the restructural filtering type power splitter of Wide stop bands measure, wherein input return loss indicates input port
P1Return loss, use S11It indicates, unit dB, measurement result such as Fig. 5.In Fig. 5, horizontal axis expression frequency, unit GHz,
Ranging from 1.4GHz to 3.0GHz, longitudinal axis expression input return loss (| S11| (dB)), in ranging from -26dB~3dB, Fig. 5 altogether
There are 6 curves, wherein solid line is measurement result, and dotted line is simulation result, this 6 curves indicate respectively, negative in varactor
Pole loads S when different DC voltages11Curve graph, the voltage value of load are respectively 9V, 8V, 7V, and curve is from right to left successively
Corresponding capacitance is 1.2pF, 1.4pF, 1.6pF, by the measured result as it can be seen that the power splitter of the present invention has there are one passband,
The tunable center frequency of passband is respectively 2.19GHz, 2.0GHz, 1.96GHz, the value of input return loss in free transmission range |
S11| it is all higher than 15dB.
Content 2 is surveyed, by vector network analyzer Agilent N5230A to the present invention based on SIR and DGS structures
The insertion loss of the restructural filtering type power splitter of Wide stop bands measure, wherein insertion loss is indicated from input port P1Respectively
To output port P2, output port P3Insertion loss, use S respectively21、S31It indicates, unit dB, measurement result such as Fig. 6, such as
Fig. 7.In figure 6 and figure 7, horizontal axis indicates that frequency, unit GHz, ranging from 1.4GHz to 3.0GHz, the longitudinal axis indicate to be inserted into respectively
Loss (| S21|(dB))、|S31| (dB)), there are 6 curves in ranging from -35dB~0dB, Fig. 6 and Fig. 7, wherein solid line is to survey
Amount is as a result, dotted line is simulation result, this 6 curves indicate respectively, when varactor cathode loads different DC voltages
S21、S31The voltage value of curve graph, load is respectively 9V, 8V, 7V, and the capacitance that curve is corresponding in turn to from right to left is
1.2pF, 1.4pF, 1.6pF, by the measured result, as it can be seen that the power splitter of the present invention has, there are one passband, the tunable centers of passband
Frequency is respectively 2.19GHz, 2.0GHz, 1.96GHz, the value of insertion loss in free transmission range | S21|、|S31| variation range
For 3.76dB to 4.45dB.
Content 3 is surveyed, by vector network analyzer Agilent N5230A to the present invention based on SIR and DGS structures
The isolation of the restructural filtering type power splitter of Wide stop bands measure, wherein isolation refers to output port P2With output port P3It
Between isolation, for reducing output port P2With output port P3Between coupling, use S23It indicates, unit dB, measures knot
Fruit such as Fig. 8.In Fig. 8, horizontal axis expression frequency, unit GHz, ranging from 1.4GHz to 3.0GHz, longitudinal axis expression isolation (| S23|
(dB)) 6 curves are shared in, ranging from -23dB~0dB, Fig. 8, wherein solid line is measurement result, and dotted line is simulation result, this 6
Curve indicates respectively, the S when varactor cathode loads different DC voltages23Curve graph, the voltage value point of load
Not Wei 9V, 8V, 7V, the capacitance that curve is corresponding in turn to from right to left be 1.2pF, 1.4pF, 1.6pF, can by the measured result
To see, for power splitter of the invention tool there are one passband, the tunable center frequency of passband is respectively 2.19GHz, 2.0GHz, 1.96GHz,
The value of the isolation of the power splitter in free transmission range | S23| it is all higher than 17.5dB.
Content 4 is surveyed, by vector network analyzer Agilent N5230A to the present invention based on SIR and DGS structures
The output return loss of the restructural filtering type power splitter of Wide stop bands measure, wherein output return loss indicates to export respectively
Port P2, output port P3Return loss, use S respectively22、S33It indicates, unit dB, measurement result such as Fig. 9, such as Figure 10.
In figure 9 and in figure 10, horizontal axis indicates that frequency, unit GHz, ranging from 1.4GHz to 3.0GHz, the longitudinal axis indicate that echo damages respectively
Consumption (| S22|(dB))、|S33| (dB)), range is respectively to have 6 songs in -21dB~0dB, -25dB~0dB, Fig. 9 and Figure 10
Line, wherein solid line are measurement results, and dotted line is simulation result, this 6 curves indicate respectively, are loaded not in varactor cathode
With DC voltage when S22、S33The voltage value of curve graph, load is respectively 9V, 8V, 7V, and curve is corresponding in turn to from right to left
Capacitance be 1.2pF, 1.4pF, 1.6pF, by the measured result as it can be seen that the power splitter tool of the present invention is there are one passband, passband
Tunable center frequency be respectively 2.19GHz, 2.0GHz, 1.96GHz, the value of return loss in free transmission range | S22|、|S33|
Value be all higher than 15dB.
Content 5 is surveyed, by vector network analyzer Agilent N5230A to the present invention based on SIR and DGS structures
The broadband output insertion loss of the restructural filtering type power splitter of Wide stop bands measure, wherein insertion loss is indicated from input
Port P1Output port P is arrived respectively2, output port P3Insertion loss, use S respectively21、S31It indicates, unit dB, measures knot
Fruit such as Figure 11, such as Figure 12.In Figure 11 and Figure 12, horizontal axis indicates that frequency, unit GHz, ranging from 1.4GHz to 8.0GHz are indulged
Axis indicate respectively insertion loss (| S21|(dB))、|S31| (dB)), there are 6 in ranging from -65dB~1dB, Figure 11 and Figure 12
Curve, wherein solid line are measurement results, and dotted line is simulation result, this 6 curves indicate respectively, are loaded in varactor cathode
S when different DC voltage21、S31The voltage value of curve graph, load is respectively 9V, 8V, 7V, and curve is right successively from right to left
The capacitance answered be 1.2pF, 1.4pF, 1.6pF, by the measured result as it can be seen that the present invention filtering type power splitter from 2.7GHz~
The value of the Out-of-band rejection of 8GHz is all higher than 20dB, and the bandwidth of stopband may be implemented 3.40 times of highest tunable center frequency, reach
The functions of the Wide stop bands of the power splitter.
Content 6 is surveyed, by vector network analyzer Agilent N5230A to the present invention based on SIR and DGS structures
The restructural filtering type power splitter of Wide stop bands relative bandwidth and insertion loss measures and data statistics, wherein relative bandwidth
It is defined as signal amplitude in working band and declines corresponding height frequency point f when 3dBHAnd fLBetween frequency-splitting and centre frequency
Ratio, indicated with FBW, such as Figure 13, in fig. 13, horizontal axis indicates frequency, unit GHz, ranging from 1.8GHz to 2.4GHz,
The longitudinal axis in left side indicates that the value of the insertion loss of the power splitter, ranging from 3.5dB to 6.0dB, the longitudinal axis on right side indicate the work(point
The relative bandwidth of device has 2 curves, an adjustable frequency model indicated in the power splitter in ranging from 0.05 to 0.125, Figure 13
It encloses for 1.86GHz to 2.34GHz, the variation range of insertion loss value is 3.76dB to 4.45dB, and another indicates the power splitter
The capacitance adjustable extent of varactor be 0.94pF to 2.0pF, the transformation range of relative bandwidth is 5.75%-11.89%,
The results show that the capacitance with varactor increases, the frequency selection function of the power splitter can enhance therewith, i.e. the work(
Divide the filtering performance of device also more preferable.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (8)
1. a kind of restructural filtering type power splitter of Wide stop bands based on SIR and DGS structures, which is characterized in that including micro-strip medium
Substrate (1), microstrip dielectric substrate (1) upper surface are provided with input microstrip line (3-1)；Signal by input microstrip line (3-1) into
Enter power splitter, by the first capacitance CD1It is transmitted to branch (6), signal is divided into two branches, each branch in branch (6)
Road is both provided with identical electronic component and microstrip line；It is micro- by SIR-T types branch (7), transmission successively per signal all the way
Band line (10) and third capacitance CD3, power splitter finally is exported from output microstrip line, is wherein arranged on SIR-T types branch (7)
SIR resonators (8) are filtered, SIR resonators (8) are also associated with the varactor of adjustment frequency and bandwidth；Two branch
The isolation resistance R of anti-stop signal coupling is provided between road after SIR-T types branch (7)；Microstrip dielectric substrate is provided on (1)
The DC power supply structure (12) of direct current signal is provided to SIR resonators (8) varactor；
Microstrip dielectric substrate (1) lower surface is provided with grounding plate (2), and it is special that realization band resistance is offered on grounding plate (2)
The defect ground structure (11) of property.
2. the restructural filtering type power splitter of a kind of Wide stop bands based on SIR and DGS structures according to claim 1, special
Sign is that each SIR-T types branch (7) includes transmission line L71, transmission line L72, transmission line L73, transmission line L74And transmission line
L75；Signal passes through transmission line L successively by a branch of branch (6)71, transmission line L72, transmission line L73With transmission line L74, finally
By transmission line L75It is sent to transmission microstrip line (10)；Wherein transmission line L73It is the minor matters transmission line of SIR-T types branch (7), signal
Via transmission line L73SIR resonators (8) are reached, signal is after treatment by L73Return to SIR-T types branch (7).
3. the restructural filtering type power splitter of a kind of Wide stop bands based on SIR and DGS structures according to claim 2, special
Sign is, transmission line L71With transmission line L75It is low-impedance line, transmission line L72, transmission line L73With transmission line L74It is high impedance line.
4. the restructural filtering type power splitter of a kind of Wide stop bands based on SIR and DGS structures according to claim 1, special
Sign is that SIR resonators (8) are open loop structure, include the transmission line L of connection81With transmission line L84, the outside of the two junction
It is connected with the minor matters transmission line of SIR-T types branch (7)；Transmission line L81Beginning and transmission line L84Terminal connection, transmission line L81
Terminal and transmission line L82Beginning connection, transmission line L82Terminal be connected with the second capacitance CD2, the second capacitance CD2
Terminal connect grounding plate (2)；Transmission line L84Beginning and transmission line L83Terminal connection, transmission line L83Beginning and
One varactor Cv1Cathode connection, the first varactor Cv1Anode connect grounding plate (2)；Transmission line L84And biography
Defeated line L81The inside of junction and the second varactor Cv2Cathode connection, the second varactor Cv2Anode ground connection
Metallic plate (2).
5. the restructural filtering type power splitter of a kind of Wide stop bands based on SIR and DGS structures according to claim 4, special
Sign is that the signal input part of branch (6) offers non-metallic via (5), and DC power supply structure (12) is by non-metallic
Direct current signal is transferred to two SIR-T types branches (7) by via (5), and then is transferred to two the first varactor Cv1With two
A second varactor Cv2。
6. the restructural filtering type power splitter of a kind of Wide stop bands based on SIR and DGS structures according to claim 1, special
Sign is that DC power supply structure (12) is mounted in defect ground structure (11)；DC power supply structure (12) includes DC power supply VCV,
DC power supply VCVIt is connected with current-limiting resistance R1, current-limiting resistance R1It is connected with conducting wire, conducting wire passes through non-metallic via (5) and branch
(6) it connects；DC power supply VCVIt is connected with the 4th capacitance C simultaneouslyD4, the 4th capacitance CD4Another termination grounded metal
Plate (2).
7. the restructural filtering type work(of a kind of Wide stop bands based on SIR and DGS structures according to claim 1-6 any one
Divide device, which is characterized in that defect ground structure (11) includes a rectangular configuration (11-4) and the identical round dumbbell of three structures
Structure；Each round dumbbell structure includes the rectangular channel (11- of two round dumbbells (11-5) and the round dumbbell of connection two
6)；Three round dumbbell structures are respectively under input microstrip line (3-1) and two output microstrip lines；Rectangular configuration is in two SIR-
Under T-type branch (7).
8. the restructural filtering type power splitter of a kind of Wide stop bands based on SIR and DGS structures according to claim 7, special
Sign is, the circular radius R of round dumbbell (11-5)11, rectangular channel (11-6) length L111With width W111It can be according to using
Demand is adjusted.
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| CN110034361A (en) * | 2019-04-23 | 2019-07-19 | 安徽大学 | It is a kind of towards 5G communication miniature ultra wide band filtering function divide feeding network and its design method |
| CN110085959A (en) * | 2019-05-31 | 2019-08-02 | 重庆邮电大学 | Based on H-type defect the miniaturization harmonics restraint etc. of artificial transmission line divides power splitter |
| CN113451722A (en) * | 2021-06-29 | 2021-09-28 | 南京智能高端装备产业研究院有限公司 | Three-passband power division filter based on microstrip coupling line |
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| CN113871830A (en) * | 2020-06-30 | 2021-12-31 | 富华科精密工业（深圳）有限公司 | Balun structure and electronic device with same |
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| CN114639931A (en) * | 2022-03-09 | 2022-06-17 | 南通大学 | Non-reflection microstrip line band-pass filter structure |
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| CN110034361A (en) * | 2019-04-23 | 2019-07-19 | 安徽大学 | It is a kind of towards 5G communication miniature ultra wide band filtering function divide feeding network and its design method |
| CN110085959A (en) * | 2019-05-31 | 2019-08-02 | 重庆邮电大学 | Based on H-type defect the miniaturization harmonics restraint etc. of artificial transmission line divides power splitter |
| CN110085959B (en) * | 2019-05-31 | 2021-03-23 | 重庆邮电大学 | Miniaturized harmonic suppression equal power divider based on H-shaped defected ground artificial transmission line |
| CN113497325A (en) * | 2020-03-18 | 2021-10-12 | 富华科精密工业（深圳）有限公司 | Broadband power divider |
| CN113871830A (en) * | 2020-06-30 | 2021-12-31 | 富华科精密工业（深圳）有限公司 | Balun structure and electronic device with same |
| CN113451722A (en) * | 2021-06-29 | 2021-09-28 | 南京智能高端装备产业研究院有限公司 | Three-passband power division filter based on microstrip coupling line |
| CN113922014A (en) * | 2021-10-13 | 2022-01-11 | 中国人民解放军32802部队 | Reconfigurable filtering phase shifter |
| CN113922014B (en) * | 2021-10-13 | 2023-01-10 | 中国人民解放军32802部队 | Reconfigurable filtering phase shifter |
| CN114335952A (en) * | 2021-12-29 | 2022-04-12 | 重庆两江卫星移动通信有限公司 | Filtering power divider with reconfigurable phase difference and distribution ratio and antenna system |
| CN114639931A (en) * | 2022-03-09 | 2022-06-17 | 南通大学 | Non-reflection microstrip line band-pass filter structure |
| CN114639931B (en) * | 2022-03-09 | 2023-07-18 | 南通大学 | Reflection-free microstrip line band-pass filter structure |
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