CN104022750B - A kind of broadband electrically tunable filter circuit - Google Patents
A kind of broadband electrically tunable filter circuit Download PDFInfo
- Publication number
- CN104022750B CN104022750B CN201410228625.3A CN201410228625A CN104022750B CN 104022750 B CN104022750 B CN 104022750B CN 201410228625 A CN201410228625 A CN 201410228625A CN 104022750 B CN104022750 B CN 104022750B
- Authority
- CN
- China
- Prior art keywords
- electric capacity
- varactor
- inductance
- resistance
- resonant element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Networks Using Active Elements (AREA)
- Filters And Equalizers (AREA)
Abstract
The present invention provides a kind of broadband electrically tunable filter circuit, the circuit includes that the Filtering Processing of a frequency range is responsible for by controller, D/A conversion chips, ratio amplifier, input gated beam switch, output gated beam switch and multiple independent electrically tunable filters, each electrically tunable filter；Described controller control D/A conversion chips produce VTUNE1 ~ VTUNE4 totally four tunnel control voltages, and four tunnel control voltages are tuned to the plurality of independent electrically tunable filter after ratio amplifier amplification；The input of the plurality of independent electrically tunable filter is connected with the input gated beam switch, outfan is connected with the output gated beam switch；The controller carries out gating control to being input into gated beam switch, output gated beam switch respectively.With the tuning range that can greatly increase whole filter circuit, and return loss deterioration is not resulted in, while filtering the outstanding advantages such as control accuracy height.
Description
Technical field
The present invention relates to electrically tunable filter field, more particularly, to a kind of broadband electrically tunable filter circuit.
Background technology
The electrically tunable filter being related in broadband transceiver have preselection filter and after select electrically tunable filter, both this
Have vital effect in a link, after select electrically tunable filter have the features such as selectivity is high, adjustable band is wide, pre-selection
Wave filter will have selectivity is strong, noise coefficient is little, tuning range width the features such as.
When the frequency range change of electrically tunable filter is less, preferable filtering characteristic can be kept.But work as frequency range
During larger even up to octave, the bandwidth of wave filter can increase, and return loss deteriorates, and has a strong impact on the performance of wave filter.Cause
This, the tuning range for how increasing wave filter as far as possible and the penalty for not making wave filter become a very challenging property
Problem.
User's performance requirement height not only to communication equipment, to volume and requires the smaller the better, traditional electricity tune now
Filter construction is complicated, and volume ratio is larger, controls also comparatively laborious.So designing the electrically tunable filter of simple and practical, small volume
Have great significance.
Electrically tunable filter in modern technologies, is widely used in multichannel receiver and electronic countermeasure, but is suitable only for
The preselection filter of radio-frequency front-end, and pass band insertion loss is larger, increased the noise coefficient of system, reduces the sensitive of receiver
Degree, reduces the dynamic range of system reception.The pre-selection electrically tunable filter for how designing filter with low insertion loss is also a difficult problem.
Content of the invention
It is an object of the invention to：For the problem that prior art is present, there is provided one kind can greatly increase whole wave filter
The tuning range of circuit, and return loss deterioration is not resulted in, while filtering the high broadband electrically tunable filter circuit of control accuracy.
The goal of the invention of the present invention is achieved through the following technical solutions：
A kind of broadband electrically tunable filter circuit, it is characterised in that the circuit includes controller, D/A conversion chips, ratio fortune
Put, be input into gated beam switch, output gated beam switch and multiple independent electrically tunable filters, each electrically tunable filter is responsible for
The Filtering Processing of one frequency range；Described controller control D/A conversion chips produce VTUNE1～VTUNE4 totally four tunnels control electricity
Pressure, four tunnel control voltages are tuned to the plurality of independent electrically tunable filter after ratio amplifier amplification；Described many
The input of individual independent electrically tunable filter is connected with the input gated beam switch, outfan is gated with the output
Electrical switch connects；The controller carries out gating control to being input into gated beam switch, output gated beam switch respectively.
Preferably, described multiple independent electrically tunable filter using inductive mode wave filter or adopt
The wave filter of capacitive coupling or process more than 1GHz a part of electrically tunable filter using capacitive coupling wave filter,
Process wave filter of a part of electrically tunable filter less than 1GHz using inductive mode.
Preferably, the wave filter of described inductive mode includes a coupling path, the first resonant element, second humorous
Shake unit and the 3rd resonant element, and the coupling path includes inductance L1, inductance L2, electric capacity C2, amplifier Q1, resistance R2, electricity
Resistance R3, resistance R4, electric capacity C4, inductance L3, inductance L4, inductance L5 and inductance L6；Radio-frequency input signals is accessed using tap mode
Between inductance L1 and inductance L2, inductance L2 is connected with the input of amplifier Q1 by electric capacity C2, described resistance R2, resistance
R3, resistance R4 are connected and provide amplifier bias voltage with amplifier Q1, and the outfan of described amplifier Q1 is sequentially connected electricity
It is grounded after holding C4, inductance L3, radio frequency output signal is accessed between inductance L5 and inductance L6 using tap mode, and inductance L5's is another
Accessed between electric capacity C4 and inductance L3 by inductance L4 at end；One end of first resonant element is accessed between inductance L2 and electric capacity C2,
The other end connects control voltage VTUNE1；One end of second resonant element is accessed between electric capacity C4 and inductance L4, and the other end connects
Control voltage VTUNE2；One end of 3rd resonant element is accessed between inductance L4 and inductance L5, and the other end connects control voltage
VTUNE3.
Preferably, the first described resonant element includes electric capacity C1, resistance R1, varactor CR1 and varactor
One end of CR2, described electric capacity C1 is grounded, the other end is connected to varactor CR1 and varactor CR2 by resistance R1
Between, varactor CR1 is interconnected with varactor CR2 negative poles, the plus earth of varactor CR1, varactor
The positive pole of CR2 is connected between inductance L2 and electric capacity C2, and control voltage VTUNE1 is connected between electric capacity C1 and resistance R1；Described
The second resonant element include electric capacity C5, resistance R5, varactor CR3 and varactor CR4, the one of described electric capacity C5
End ground connection, the other end be connected between varactor CR3 and varactor CR4 by resistance R5, varactor CR3 and
Varactor CR4 negative poles are interconnected, and the plus earth of varactor CR3, the positive pole of varactor CR4 are connected to electric capacity C4
Between inductance L4, control voltage VTUNE2 is connected between electric capacity C5 and resistance R5；The 3rd described resonant element includes electricity
Hold C6, resistance R6, varactor CR5 and varactor CR6, one end ground connection of described electric capacity C6, the other end are by electricity
Resistance R6 is connected between varactor CR5 and varactor CR6, and varactor CR5 is mutual with varactor CR6 negative poles
Even, the plus earth of varactor CR5, the positive pole of varactor CR6 are connected between inductance L4 and inductance L5, control electricity
Pressure VTUNE3 is connected between electric capacity C6 and resistance R6.
Preferably, the wave filter of described capacitive coupling includes a radio frequency path, the first resonant element, second humorous
Shake unit and the 3rd resonant element, and described radio frequency path includes electric capacity C10, electric capacity C12, electric capacity C14, amplifier U1, mirror image
Wave filter FL4 and high pass filter FL5, radio-frequency input signals access electric capacity C10, electric capacity C10 series capacitance C12, electric capacity successively
C14, amplifier U1, mirror filter FL4 and high pass filter FL5, one end of the first resonant element access electric capacity C10 and electric capacity
Between C12, the other end connects control voltage VTUNE1；One end of second resonant element is accessed between electric capacity C12 and electric capacity C14,
The other end connects control voltage VTUNE2；One end of 3rd resonant element is accessed between electric capacity C14 and amplifier U1, and the other end connects
Connect control voltage VTUNE3.
Preferably, the first described resonant element includes that electric capacity C7, resistance R7, varactor CR7, electric capacity C11 are harmonious
Shake device FL1, one end ground connection of described electric capacity C7, the other end by resistance R7 be connected to varactor CR7 and electric capacity C11 it
Between, varactor CR7 is interconnected with electric capacity C11 negative poles, and the plus earth of varactor CR7, electric capacity C11 positive poles are connected on electric capacity
Between C10 and electric capacity C12, resonator FL1 one end ground connection, another terminate between electric capacity C10 and electric capacity C12, control voltage
VTUNE1 is connected between electric capacity C7 and resistance R7；The second described resonant element includes electric capacity C8, resistance R8, varactor
CR8, electric capacity C13 resonators FL2, one end ground connection of described electric capacity C8, the other end are connected to two pole of transfiguration by resistance R8
Between pipe CR8 and electric capacity C13, varactor CR8 is interconnected with electric capacity C13 negative poles, the plus earth of varactor CR8, electricity
Hold C13 positive poles to be connected between electric capacity C12 and electric capacity C14, resonator FL2 one end ground connection, another terminate at electric capacity C12 and electric capacity
Between C14, control voltage VTUNE2 is connected between electric capacity C8 and resistance R8；The 3rd described resonant element include electric capacity C9,
Resistance R9, varactor CR9, electric capacity C15 resonators FL3, one end ground connection of described electric capacity C9, the other end pass through resistance
R9 is connected between varactor CR9 and electric capacity C15, and varactor CR9 is interconnected with electric capacity C15 negative poles, varactor
The plus earth of CR9, electric capacity C15 positive poles are connected between electric capacity C14 and amplifier U1, resonator FL3 one end ground connection, another termination
Between electric capacity C14 and amplifier U1, control voltage VTUNE3 is connected between electric capacity C9 and resistance R9.
Preferably, the wave filter of described inductive mode includes a coupling path, the first resonant element, second humorous
Shake unit and the 3rd resonant element, and the coupling path includes inductance L7, inductance L8, inductance L9, inductance L10, inductance L11, electricity
Sense L12 and inductance L13, radio-frequency input signals are accessed between inductance L7 and inductance L8 using tap mode, the other end of inductance L8
It is sequentially connected inductance L9, inductance L11 and inductance L12, the other end output radiofrequency signal of inductance L12, the first described resonance list
First one end is connected between inductance L8 and inductance L9, and the second described resonant element and inductance L10 are both connected to inductance L9 with electricity
Between sense L11, the other end ground connection of inductance L10, the 3rd described resonant element are connected between inductance L11 and inductance L12, institute
One end ground connection of the inductance L13 for stating, other end inductance L12 outfans.
Preferably, the first described resonant element include electric capacity C16, resistance R10, varactor CR10, electric capacity C17,
Electric capacity C18, varactor CR11, resistance R11 and electric capacity C19, one end ground connection of described electric capacity C16, the other end are by electricity
Resistance R10 is connected between varactor CR10 and electric capacity C17, and described varactor CR10 is interconnected with electric capacity C17 negative poles,
The plus earth of varactor CR10, the positive pole of electric capacity C17 are connected between inductance L8 and inductance L9, described electric capacity C19
One end ground connection, the other end be connected between electric capacity C18 and varactor CR11 by resistance R11, electric capacity C18 and transfiguration two
Pole pipe CR11 negative pole is interconnected, the plus earth of varactor CR11, the positive pole of electric capacity C18 be connected to varactor CR10 with
Between electric capacity C17, control voltage VTUNE1 is connected between electric capacity C16 and resistance R10, and control voltage VTUNE4 is connected to resistance
Between R11 and electric capacity C19；The second described resonant element includes electric capacity C20, resistance R12, varactor CR12, electric capacity
C21, electric capacity C22, varactor CR13, resistance R13 and electric capacity C23, one end ground connection of described electric capacity C20, the other end lead to
Cross resistance R12 to be connected between varactor CR12 and electric capacity C21, described varactor CR12 and electric capacity C21 negative poles
Interconnection, the plus earth of varactor CR12, the positive pole of electric capacity C21 are connected between inductance L9 and inductance L11, described electricity
Hold C23 one end ground connection, the other end be connected between electric capacity C22 and varactor CR13 by resistance R13, electric capacity C22 and
Varactor CR13 negative poles are interconnected, and the plus earth of varactor CR13, the positive pole of electric capacity C22 are connected to varactor
Between CR12 and electric capacity C21, control voltage VTUNE2 is connected between electric capacity C20 and resistance R12, and control voltage VTUNE4 connects
Between resistance R13 and electric capacity C23；The 3rd described resonant element include electric capacity C24, resistance R14, varactor CR14,
Electric capacity C25, electric capacity C26, varactor CR15, resistance R15 and electric capacity C27, one end ground connection of described electric capacity C26, another
End is connected between varactor CR14 and electric capacity C25 by resistance R14, described varactor CR14 and electric capacity C25
Negative pole is interconnected, and the plus earth of varactor CR14, the positive pole of electric capacity C25 are connected between inductance L11 and inductance L12, institute
One end ground connection of the electric capacity C27 for stating, the other end are connected between electric capacity C26 and varactor CR15 by resistance R15, electric capacity
C26 is interconnected with varactor CR15 negative poles, and the plus earth of varactor CR15, the positive pole of electric capacity C26 are connected to transfiguration
Between diode CR14 and electric capacity C25, control voltage VTUNE4 is connected between electric capacity C24 and resistance R14, control voltage
VTUNE4 is connected between resistance R15 and electric capacity C27.
Compared with prior art, the present invention has advantages below：
1st, it is designed using frequency range dividing mode, multiple independent electrically tunable filters is set, each electrically tunable filter is born
The signal processing of one frequency segmentation of duty, so as to considerably increase the tuning range of whole filter circuit, and does not result in back
Ripple loss deteriorates；
2nd, it is designed as resonance circuit using capister, varactor adopts DC-voltage supply mode,
FPGA control D/A conversion chip output control voltages are amplified to carry out voltage control to varactor, and control accuracy is high, can
Reach 0.07V；
3rd, circuit of the present invention can be with Integrated design in broadband transceiver, and overall structure is simple, and size is less, controlling party
Just；
4th, resonance circuit is combined with low-noise amplifier and is designed, and has both been met the needs of frequency selection, has been also reduced filter
The noise coefficient of ripple device circuit, meanwhile, filter circuit also have certain gain, improve filter circuit sensitivity and
The indexs such as range of receiving.
5th, the varactor resonance circuit for adopting, employs different varactor devices according to different frequency segmentations
Part, in the tuning range of 3 octaves, squareness factor, relative bandwidth and standing wave all meet design will for the electrically tunable filter for making
Ask.
Description of the drawings
Fig. 1 is the structural representation of filter circuit of the present invention；
Structural representations of the Fig. 2 for below 1GHz preselection filters；
Structural representations of the Fig. 3 for more than 1GHz preselection filters；
Fig. 4 selects the structural representation of electrically tunable filter after being.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
As shown in figure 1, a kind of broadband electrically tunable filter circuit of the invention, the circuit includes controller FPGA, D/A conversion core
Piece, ratio amplifier, input gated beam switch, output gated beam switch and multiple independent electrically tunable filters, each electricity are adjusted
The Filtering Processing of a frequency range is responsible for by wave filter.Controller FPGA control D/A conversion chips produce VTUNE1～VTUNE4 totally four
Road control voltage, 0～3V of voltage range.As the control voltage of varactor is between 0～18V, therefore 4 tunnel control voltages are needed
Obtain the VTUNE1-VTUNE4 VTs of 0～18V after ratio amplifier to adjust multiple independent electrically tunable filters
Humorous.The input of multiple independent electrically tunable filters is connected with input gated beam switch, outfan is electric with output gating
Son switch connection.Controller carries out gating control to being input into gated beam switch, output gated beam switch respectively, realizes different
Frequency select different electrically tunable filters to switch over.
Multiple independent electrically tunable filters are using the wave filter of inductive mode or using capacitive coupling
Wave filter or a part of electrically tunable filter processed more than 1GHz adopt the wave filter of capacitive coupling, process less than 1GHz's
Wave filter of a part of electrically tunable filter using inductive mode.
Electrically tunable filter is typically controlled the gating of electrical switch or changes varactor by different direct current biasings
Capacitance so that changing the element characteristic and impedance effect of wave filter, obtain different resonant frequencies and bandwidth of operation, so as to
Realize structural rearrangement and the frequency tuning of wave filter.Electrically tunable filter in the present invention, using varactor designs resonance
Unit, changes the capacitance of varactor by the bias voltage of change varactor, so as to change the center frequency of wave filter
Rate.Varactor abbreviation varactor, is a kind of semiconductor diode, is the core parts of tuning filtering device.Its junction capacity
Change with applying bias, and present obvious nonlinear characteristic.If usually two or more varactors are together in parallel
Use, little capacitance, relatively large absolute capacitance tuning range can also be obtained and reduce equivalent series loss resistance.Choosing
Varactor maximum bear voltage suitable with VT when, the Q-value of pipe is maximum.
When multiple electrically tunable filters adopt different filter combinations, whole filter circuit can be described as preselecting electrically regulated filtering
Device or after select electrically tunable filter.
If whole wave filter is used as pre-selection electrically tunable filter, and when all processing the frequency of below 1GHz, its multiple electricity
Tunable filter adopts structure as shown in Figure 1, the structure to adopt inductive mode, and the electric capacity for being adopted, inductance are using patch
Chip package.The structure adopts 3 resonant elements, 3 VTs to be added to two identical varactors by series resistance altogether
Centre, the negative pole of two varactors is connected, and a varactor plus earth, another varactor positive pole connect
Enter coupling path.Multiple electrically tunable filter concrete structures are as follows：Including a coupling path, the first resonant element, the second resonance
Unit and the 3rd resonant element.Coupling path includes inductance L1, inductance L2, electric capacity C2, amplifier Q1, resistance R2, resistance R3, electricity
Resistance R4, electric capacity C4, inductance L3, inductance L4, inductance L5 and inductance L6.Radio-frequency input signals using tap mode access inductance L1 with
Between inductance L2, inductance L2 is connected with the input of amplifier Q1 by electric capacity C2.Resistance R2, resistance R3, resistance R4 and amplification
Device Q1 connects and provides amplifier bias voltage.The outfan of amplifier Q1 is grounded after being sequentially connected electric capacity C4, inductance L3, radio frequency
Output signal is accessed between inductance L5 and inductance L6 using tap mode, and the other end of inductance L5 accesses electric capacity C4 by inductance L4
Between inductance L3.First resonant element includes electric capacity C1, resistance R1, varactor CR1 and varactor CR2, electric capacity
One end ground connection of C1, the other end are connected between varactor CR1 and varactor CR2 by resistance R1, two pole of transfiguration
Pipe CR1 is interconnected with varactor CR2 negative poles, the plus earth of varactor CR1, the positive pole connection of varactor CR2
Between inductance L2 and electric capacity C2, control voltage VTUNE1 is connected between electric capacity C1 and resistance R1.Second resonant element includes
Electric capacity C5, resistance R5, varactor CR3 and varactor CR4, one end ground connection of electric capacity C5, the other end pass through resistance R5
It is connected between varactor CR3 and varactor CR4, varactor CR3 is interconnected with varactor CR4 negative poles,
The plus earth of varactor CR3, the positive pole of varactor CR4 are connected between electric capacity C4 and inductance L4, control voltage
VTUNE2 is connected between electric capacity C5 and resistance R5.3rd resonant element include electric capacity C6, resistance R6, varactor CR5 and
One end ground connection of varactor CR6, electric capacity C6, the other end are connected to two pole of varactor CR5 and transfiguration by resistance R6
Between pipe CR6, varactor CR5 is interconnected with varactor CR6 negative poles, the plus earth of varactor CR5, transfiguration two
The positive pole of pole pipe CR6 is connected between inductance L4 and inductance L5, and control voltage VTUNE3 is connected between electric capacity C6 and resistance R6.
If whole wave filter is used as pre-selection electrically tunable filter, and when all processing the frequency of more than 1GHz, its multiple electricity
Tunable filter adopts structure as shown in Figure 2, and the structure adopts capacitive coupling, and the electric capacity that adopted, inductance are using patch
Chip package.All of electrically tunable filter structure is as follows：Including a radio frequency path, the first resonant element, the second resonant element
With the 3rd resonant element.Radio frequency path includes electric capacity C10, electric capacity C12, electric capacity C14, amplifier U1, mirror filter FL4 and height
Bandpass filter FL5, radio-frequency input signals access electric capacity C10, electric capacity C10 successively series capacitance C12, electric capacity C14, amplifier U1,
Mirror filter FL4 and high pass filter FL5.First resonant element includes electric capacity C7, resistance R7, varactor CR7, electric capacity
C11 resonators FL1, one end ground connection of electric capacity C7, the other end are connected to varactor CR7 and electric capacity C11 by resistance R7
Between, varactor CR7 is interconnected with electric capacity C11 negative poles, and the plus earth of varactor CR7, electric capacity C11 positive poles are connected on
Between electric capacity C10 and electric capacity C12, resonator FL1 one end ground connection, another terminate between electric capacity C10 and electric capacity C12, control electricity
Pressure VTUNE1 is connected between electric capacity C7 and resistance R7.Second resonant element include electric capacity C8, resistance R8, varactor CR8,
Electric capacity C13 resonators FL2, one end ground connection of electric capacity C8, the other end are connected to varactor CR8 and electric capacity by resistance R8
Between C13, varactor CR8 is interconnected with electric capacity C13 negative poles, and the plus earth of varactor CR8, electric capacity C13 positive poles connect
Between electric capacity C12 and electric capacity C14, resonator FL2 one end ground connection, another terminate between electric capacity C12 and electric capacity C14, control
Voltage VTUNE2 is connected between electric capacity C8 and resistance R8.3rd resonant element includes electric capacity C9, resistance R9, varactor
CR9, electric capacity C15 resonators FL3, electric capacity C9 one end ground connection, the other end by resistance R9 be connected to varactor CR9 and
Between electric capacity C15, varactor CR9 is interconnected with electric capacity C15 negative poles, the plus earth of varactor CR9, and electric capacity C15 is just
Pole is connected between electric capacity C14 and amplifier U1, resonator FL3 one end ground connection, another terminate at electric capacity C14 and amplifier U1 it
Between, control voltage VTUNE3 is connected between electric capacity C9 and resistance R9.Can be controlled by controlling the bias voltage of amplifier U1
The gain of amplifier, meets mirror filter FL4 behind amplifier, mainly the mirror image of rf frequency is suppressed, and mirror image is filtered
Radiofrequency signal is exported after device FL4 connection high pass filter FL5.High pass filter FL5 Main Functions are to filter out-of-band interference.
If whole wave filter is used as pre-selection electrically tunable filter, and has both processed below 1GHz, processed below 1GHz's again
During frequency, then multiple wave filter are divided into two parts, and process the part of below 1GHz using structure shown in Fig. 2, process 1GHz with
Under part adopt structure shown in Fig. 3.For example, processing frequency scope：During 225-2000MHz, frequency range is divided into 7 sections, and
One independent electrically tunable filter of per section of employing, is switched over by controlling switch.Also need Con trolling index as follows simultaneously：Tuning electricity
Pressure：0-18V, FPGA control D/A output voltages are obtained after amplifying；Tuned speed is fast：Tuned speed≤uS；3dB relative bandwidths：4
～12%；Squareness factor：3.5<Squareness factor<6.5；Gain：4～10dB；Maximum standing-wave ratio：≤1.8；Maximal input：
Operating temperature range：- 55 DEG C～+85 DEG C；Storage temperature range：- 60 DEG C～+105 DEG C.
If whole wave filter selects electrically tunable filter as after, its multiple electrically tunable filter adopts structure as shown in Figure 3,
The structure adopts capacitive coupling, and the structure adopts 3 resonant elements altogether, and each resonant element is using two different models
Varactor is tuned jointly.All of electrically tunable filter structure is as follows：Including a coupling path, the first resonant element,
Two resonant elements and the 3rd resonant element.Coupling path includes inductance L7, inductance L8, inductance L9, inductance L10, inductance L11, electricity
Sense L12 and inductance L13, radio-frequency input signals are accessed between inductance L7 and inductance L8 using tap mode, the other end of inductance L8
It is sequentially connected inductance L9, inductance L11 and inductance L12, the other end output radiofrequency signal of inductance L12.First resonant element includes
Electric capacity C16, resistance R10, varactor CR10, electric capacity C17, electric capacity C18, varactor CR11, resistance R11 and electric capacity
One end ground connection of C19, electric capacity C16, the other end are connected between varactor CR10 and electric capacity C17 by resistance R10, transfiguration
Diode CR10 is interconnected with electric capacity C17 negative poles, and the plus earth of varactor CR10, the positive pole of electric capacity C17 are connected to inductance
Between L8 and inductance L9, one end ground connection of electric capacity C19, the other end are connected to electric capacity C18 and varactor by resistance R11
Between CR11, electric capacity C18 is interconnected with varactor CR11 negative poles, the plus earth of varactor CR11, and electric capacity C18 is just
Pole is connected between varactor CR10 and electric capacity C17, and control voltage VTUNE1 is connected between electric capacity C16 and resistance R10,
Control voltage VTUNE4 is connected between resistance R11 and electric capacity C19.Second resonant element includes electric capacity C20, resistance R12, transfiguration
Diode CR12, electric capacity C21, electric capacity C22, varactor CR13, resistance R13 and electric capacity C23, one end ground connection of electric capacity C20,
The other end is connected between varactor CR12 and electric capacity C21 by resistance R12, and varactor CR12 and electric capacity C21 bears
Pole interconnects, and the plus earth of varactor CR12, the positive pole of electric capacity C21 are connected between inductance L9 and inductance L11, electric capacity
One end ground connection of C23, the other end are connected between electric capacity C22 and varactor CR13 by resistance R13, electric capacity C22 and change
Hold the interconnection of diode CR13 negative poles, the plus earth of varactor CR13, the positive pole of electric capacity C22 are connected to varactor
Between CR12 and electric capacity C21, control voltage VTUNE2 is connected between electric capacity C20 and resistance R12, and control voltage VTUNE4 connects
Between resistance R13 and electric capacity C23.3rd resonant element includes electric capacity C24, resistance R14, varactor CR14, electric capacity
C25, electric capacity C26, varactor CR15, resistance R15 and electric capacity C27, one end ground connection of electric capacity C26, the other end pass through resistance
R14 is connected between varactor CR14 and electric capacity C25, and varactor CR14 is interconnected with electric capacity C25 negative poles, two pole of transfiguration
The plus earth of pipe CR14, the positive pole of electric capacity C25 are connected between inductance L11 and inductance L12, one end of electric capacity C27 ground connection, another
One end is connected between electric capacity C26 and varactor CR15 by resistance R15, electric capacity C26 and varactor CR15 negative poles
Interconnection, the plus earth of varactor CR15, the positive pole of electric capacity C26 are connected between varactor CR14 and electric capacity C25,
Control voltage VTUNE4 is connected between electric capacity C24 and resistance R14, and control voltage VTUNE4 is connected to resistance R15 and electric capacity C27
Between.
For example：Preselection filter processing frequency scope：Frequency range is divided into 5 sections by 225-2000MHz, per section of employing one
Individual independent electrically tunable filter, is switched over by controlling switch.Also need Con trolling index as follows simultaneously：Filter tuner type：
Chebyshev's type is responded；Tuned speed is fast：Tuned speed≤uS；3dB relative bandwidths：5～15%；Squareness factor：3.2<Square
Shape coefficient<6.8；With interior Insertion Loss：<7.5dB；Maximum standing-wave ratio：≤2；Maximal input：+20dBm；Operating temperature range：-
55 DEG C～+85 DEG C；Storage temperature range：- 60 DEG C～+105 DEG C.
Presently preferred embodiments of the present invention is the foregoing is only, not in order to limiting the present invention, it is noted that all
Any modification, equivalent and improvement for being made within the spirit and principles in the present invention etc., should be included in the guarantor of the present invention
Within the scope of shield.
Claims (6)
1. a kind of broadband electrically tunable filter circuit, it is characterised in that the circuit includes controller, D/A conversion chips, ratio fortune
Put, be input into gated beam switch, output gated beam switch and multiple independent electrically tunable filters, each electrically tunable filter is responsible for
The Filtering Processing of one frequency range；Described controller control D/A conversion chips produce VTUNE1～VTUNE4 totally four tunnels control electricity
Pressure, four tunnel control voltages are tuned to the plurality of independent electrically tunable filter after ratio amplifier amplification；Described many
The input of individual independent electrically tunable filter is connected with the input gated beam switch, outfan is gated with the output
Electrical switch connects；The controller carries out gating control to being input into gated beam switch, output gated beam switch respectively；Institute
The multiple independent electrically tunable filter that states is using the wave filter of inductive mode or using the filtering of capacitive coupling
Device or process are more than that the wave filter of a part of electrically tunable filter using capacitive coupling of 1GHz, process are less than 1GHz
Divide electrically tunable filter using the wave filter of inductive mode；The wave filter of described inductive mode includes that a coupling is logical
Road, the first resonant element, the second resonant element and the 3rd resonant element, the coupling path include inductance L1, inductance L2, electric capacity
C2, amplifier Q1, resistance R2, resistance R3, resistance R4, electric capacity C4, inductance L3, inductance L4, inductance L5 and inductance L6；Radio frequency is input into
Signal is accessed between inductance L1 and inductance L2 using tap mode, and inductance L2 is connected by the input of electric capacity C2 and amplifier Q1
Connect, described resistance R2, resistance R3, resistance R4 are connected and provide amplifier bias voltage, described amplifier with amplifier Q1
The outfan of Q1 is grounded after being sequentially connected electric capacity C4, inductance L3, and radio frequency output signal accesses inductance L5 with electricity using tap mode
Between sense L6, the other end of inductance L5 is accessed between electric capacity C4 and inductance L3 by inductance L4；One termination of the first resonant element
Enter between inductance L2 and electric capacity C2, the other end connects control voltage VTUNE1；One end of second resonant element access electric capacity C4 with
Between inductance L4, the other end connects control voltage VTUNE2；One end of 3rd resonant element is accessed between inductance L4 and inductance L5,
The other end connects control voltage VTUNE3.
2. a kind of broadband electrically tunable filter circuit according to claim 1, it is characterised in that the first described resonant element
Including electric capacity C1, resistance R1, varactor CR1 and varactor CR2, one end ground connection of described electric capacity C1, the other end
It is connected between varactor CR1 and varactor CR2 by resistance R1, varactor CR1 and varactor CR2
Negative pole is interconnected, and the plus earth of varactor CR1, the positive pole of varactor CR2 are connected between inductance L2 and electric capacity C2,
Control voltage VTUNE1 is connected between electric capacity C1 and resistance R1；The second described resonant element includes electric capacity C5, resistance R5, change
One end of appearance diode CR3 and varactor CR4, described electric capacity C5 is grounded, the other end is connected to transfiguration by resistance R5
Between diode CR3 and varactor CR4, varactor CR3 is interconnected with varactor CR4 negative poles, varactor
The plus earth of CR3, the positive pole of varactor CR4 are connected between electric capacity C4 and inductance L4, and control voltage VTUNE2 connects
Between electric capacity C5 and resistance R5；The 3rd described resonant element includes electric capacity C6, resistance R6, varactor CR5 and transfiguration
One end of diode CR6, described electric capacity C6 is grounded, the other end is connected to varactor CR5 and transfiguration two by resistance R6
Between pole pipe CR6, varactor CR5 is interconnected with varactor CR6 negative poles, the plus earth of varactor CR5, transfiguration
The positive pole of diode CR6 is connected between inductance L4 and inductance L5, control voltage VTUNE3 be connected to electric capacity C6 and resistance R6 it
Between.
3. a kind of broadband electrically tunable filter circuit according to claim 1, it is characterised in that described capacitive coupling
Wave filter include a radio frequency path, the first resonant element, the second resonant element and the 3rd resonant element, described radio frequency leads to
Road includes that electric capacity C10, electric capacity C12, electric capacity C14, amplifier U1, mirror filter FL4 and high pass filter FL5, radio frequency are input into
Signal accesses electric capacity C10, electric capacity C10 series capacitance C12, electric capacity C14, amplifier U1, mirror filter FL4 and high pass filters successively
Ripple device FL5, one end of the first resonant element are accessed between electric capacity C10 and electric capacity C12, and the other end connects control voltage VTUNE1；
One end of second resonant element is accessed between electric capacity C12 and electric capacity C14, and the other end connects control voltage VTUNE2；3rd resonance
One end of unit is accessed between electric capacity C14 and amplifier U1, and the other end connects control voltage VTUNE3.
4. a kind of broadband electrically tunable filter circuit according to claim 3, it is characterised in that the first described resonant element
Including electric capacity C7, resistance R7, varactor CR7, electric capacity C11 resonators FL1, one end ground connection of described electric capacity C7, another
One end is connected between varactor CR7 and electric capacity C11 by resistance R7, and varactor CR7 is mutual with electric capacity C11 negative poles
Connection, the plus earth of varactor CR7, electric capacity C11 positive poles are connected between electric capacity C10 and electric capacity C12, resonator FL1 one end
Ground connection, another terminate between electric capacity C10 and electric capacity C12, control voltage VTUNE1 is connected between electric capacity C7 and resistance R7；Institute
The second resonant element that states includes electric capacity C8, resistance R8, varactor CR8, electric capacity C13 resonators FL2, described electric capacity
C8 one end ground connection, the other end be connected between varactor CR8 and electric capacity C13 by resistance R8, varactor CR8 and
Electric capacity C13 negative poles are interconnected, and the plus earth of varactor CR8, electric capacity C13 positive poles are connected between electric capacity C12 and electric capacity C14,
Resonator FL2 one end ground connection, another terminate between electric capacity C12 and electric capacity C14, control voltage VTUNE2 be connected to electric capacity C8 with
Between resistance R8；The 3rd described resonant element includes electric capacity C9, resistance R9, varactor CR9, electric capacity C15 resonators
One end of FL3, described electric capacity C9 is grounded, the other end is connected between varactor CR9 and electric capacity C15 by resistance R9,
Varactor CR9 is interconnected with electric capacity C15 negative poles, and the plus earth of varactor CR9, electric capacity C15 positive poles are connected on electric capacity C14
Between amplifier U1, resonator FL3 one end ground connection, another terminate between electric capacity C14 and amplifier U1, control voltage
VTUNE3 is connected between electric capacity C9 and resistance R9.
5. a kind of broadband electrically tunable filter circuit, it is characterised in that the circuit includes controller, D/A conversion chips, ratio fortune
Put, be input into gated beam switch, output gated beam switch and multiple independent electrically tunable filters, each electrically tunable filter is responsible for
The Filtering Processing of one frequency range；Described controller control D/A conversion chips produce VTUNE1～VTUNE4 totally four tunnels control electricity
Pressure, four tunnel control voltages are tuned to the plurality of independent electrically tunable filter after ratio amplifier amplification；Described many
The input of individual independent electrically tunable filter is connected with the input gated beam switch, outfan is gated with the output
Electrical switch connects；The controller carries out gating control to being input into gated beam switch, output gated beam switch respectively；Institute
The multiple independent electrically tunable filter that states is using the wave filter of inductive mode；The wave filter of described inductive mode
Including a coupling path, the first resonant element, the second resonant element and the 3rd resonant element, the coupling path includes inductance
L7, inductance L8, inductance L9, inductance L10, inductance L11, inductance L12 and inductance L13, radio-frequency input signals are connect using tap mode
Enter between inductance L7 and inductance L8, the other end of inductance L8 is sequentially connected inductance L9, inductance L11 and inductance L12, inductance L12's
The other end exports radiofrequency signal, and first described resonant element one end is connected between inductance L8 and inductance L9, and described second
Resonant element and inductance L10 are both connected between inductance L9 and inductance L11, and the other end ground connection of inductance L10, described the 3rd are humorous
The unit that shakes is connected between inductance L11 and inductance L12, one end ground connection of described inductance L13, other end inductance L12 outfans.
6. a kind of broadband electrically tunable filter circuit according to claim 5, it is characterised in that the first described resonant element
Including electric capacity C16, resistance R10, varactor CR10, electric capacity C17, electric capacity C18, varactor CR11, resistance R11 and electricity
One end of appearance C19, described electric capacity C16 is grounded, the other end is connected to varactor CR10 and electric capacity C17 by resistance R10
Between, described varactor CR10 is interconnected with electric capacity C17 negative poles, the plus earth of varactor CR10, electric capacity C17's
Positive pole is connected between inductance L8 and inductance L9, and one end ground connection of described electric capacity C19, the other end are connected to by resistance R11
Between electric capacity C18 and varactor CR11, electric capacity C18 is interconnected with varactor CR11 negative poles, varactor CR11's
Plus earth, the positive pole of electric capacity C18 are connected between varactor CR10 and electric capacity C17, and control voltage VTUNE1 is connected to
Between electric capacity C16 and resistance R10, control voltage VTUNE4 is connected between resistance R11 and electric capacity C19；The second described resonance
Unit includes electric capacity C20, resistance R12, varactor CR12, electric capacity C21, electric capacity C22, varactor CR13, resistance R13
With electric capacity C23, one end ground connection of described electric capacity C20, the other end are connected to varactor CR12 and electric capacity by resistance R12
Between C21, described varactor CR12 is interconnected with electric capacity C21 negative poles, the plus earth of varactor CR12, electric capacity
The positive pole of C21 is connected between inductance L9 and inductance L11, and one end ground connection of described electric capacity C23, the other end pass through resistance R13
It is connected between electric capacity C22 and varactor CR13, electric capacity C22 is interconnected with varactor CR13 negative poles, varactor
The plus earth of CR13, the positive pole of electric capacity C22 are connected between varactor CR12 and electric capacity C21, control voltage VTUNE2
It is connected between electric capacity C20 and resistance R12, control voltage VTUNE4 is connected between resistance R13 and electric capacity C23；Described
Three resonant elements include electric capacity C24, resistance R14, varactor CR14, electric capacity C25, electric capacity C26, varactor CR15,
One end of resistance R15 and electric capacity C27, described electric capacity C26 is grounded, the other end is connected to varactor by resistance R14
Between CR14 and electric capacity C25, described varactor CR14 is interconnected with electric capacity C25 negative poles, the positive pole of varactor CR14
Ground connection, the positive pole of electric capacity C25 is connected between inductance L11 and inductance L12, and one end ground connection of described electric capacity C27, the other end lead to
Cross resistance R15 to be connected between electric capacity C26 and varactor CR15, electric capacity C26 is interconnected with varactor CR15 negative poles, become
Hold the plus earth of diode CR15, the positive pole of electric capacity C26 is connected between varactor CR14 and electric capacity C25, control electricity
Pressure VTUNE4 is connected between electric capacity C24 and resistance R14, and control voltage VTUNE4 is connected between resistance R15 and electric capacity C27.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410228625.3A CN104022750B (en) | 2014-05-28 | 2014-05-28 | A kind of broadband electrically tunable filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410228625.3A CN104022750B (en) | 2014-05-28 | 2014-05-28 | A kind of broadband electrically tunable filter circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104022750A CN104022750A (en) | 2014-09-03 |
| CN104022750B true CN104022750B (en) | 2017-03-15 |
Family
ID=51439358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410228625.3A Active CN104022750B (en) | 2014-05-28 | 2014-05-28 | A kind of broadband electrically tunable filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104022750B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406833B (en) * | 2015-12-15 | 2018-07-06 | 成都九洲迪飞科技有限责任公司 | A kind of intermediate frequency electrically adjusted band-pass filter with fixed inductance amount |
| CN107181029A (en) * | 2017-05-27 | 2017-09-19 | 中国电子科技集团公司第四十研究所 | A kind of wide-band double-tuned YIG-filter quickly tuned |
| CN108173529A (en) * | 2017-12-20 | 2018-06-15 | 北京遥感设备研究所 | A kind of ultra-wide band radio-frequency electric tuning filter network |
| CN108923767A (en) * | 2018-06-06 | 2018-11-30 | 武汉博畅通信设备有限责任公司 | The electrically tunable filter of 25 ~ 2500MHZ based on single-chip microcontroller F330 |
| CN111835308B (en) * | 2020-07-15 | 2023-09-05 | 武汉博畅通信设备有限责任公司 | Numerical control electrically tunable filter |
| CN112073030A (en) * | 2020-08-12 | 2020-12-11 | 武汉博畅通信设备有限责任公司 | Electrically tunable filter |
| CN115833789B (en) * | 2023-02-09 | 2023-05-02 | 成都湖山电子科技有限公司 | Switch filtering system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1450486A1 (en) * | 2003-02-20 | 2004-08-25 | TDK Corporation | Multi-Mode Filter |
| CN103117427A (en) * | 2013-02-05 | 2013-05-22 | 江苏万邦微电子有限公司 | Wideband mini low temperature co-fired ceramic balance filter |
| CN103117428A (en) * | 2013-02-05 | 2013-05-22 | 江苏奕扬电子科技股份有限公司 | Miniature band-pass filter of 60G millimeter waves |
| CN103107393A (en) * | 2013-02-05 | 2013-05-15 | 江苏万邦微电子有限公司 | Multi-octave suppression miniature-cavity filter |
-
2014
- 2014-05-28 CN CN201410228625.3A patent/CN104022750B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104022750A (en) | 2014-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104022750B (en) | A kind of broadband electrically tunable filter circuit | |
| US7218185B2 (en) | Impedance circuit, and filter circuit, amplifier circuit, semiconductor integrated circuit, electronic component, and wireless communications device using the same | |
| US20190180904A1 (en) | Tunable Inductor Arrangement, Transceiver, Method and Computer Program | |
| US10283252B2 (en) | Tunable inductor arrangement, transceiver, method and computer program | |
| CN109150227B (en) | Multi-mode radio frequency front-end circuit and control method thereof | |
| CN102571134B (en) | Radio frequency front-end integrated circuit structure with high-frequency selectivity | |
| WO2015109943A1 (en) | Antenna system and terminal | |
| CN110474657B (en) | High-frequency transceiving switch integrated circuit and method thereof | |
| WO2020062077A1 (en) | Circuit and electronic device | |
| CN111431488A (en) | Radio frequency power amplifier and communication equipment | |
| CN113346852A (en) | Fully-integrated band-pass filtering radio frequency power amplifier chip | |
| CN107565912A (en) | A kind of amplifier circuit in low noise with AF panel | |
| CN102315854B (en) | Agile ultrashort wave numerical control tracking tuning amplifying circuit with high anti-interference | |
| CN111884597A (en) | Terahertz broadband even harmonic mixing circuit based on distributed radio frequency loop and mixer | |
| CN111865263A (en) | Double-circuit numerical control frequency hopping trapper | |
| CN102751553B (en) | Small four-stop-band filter | |
| CN110021803A (en) | There are three the ultra-wide band filters of trap frequency point for tool | |
| CN206790446U (en) | A kind of low-noise amplifier applied to civil aviaton's frequency range | |
| WO2024159675A1 (en) | Ipd technology-based nb-system passive chip circuit, and chip module | |
| CN112953407A (en) | Low-noise amplifier chip with W-band filtering structure | |
| CN107634729A (en) | A kind of multi-octave ultra-wideband amplifier circuit | |
| CN204304932U (en) | Radio-frequency power amplifier output matching circuit | |
| CN215187067U (en) | Filter circuit and television antenna amplifier | |
| CN110492207B (en) | Gyromagnetic filter ring-ball multi-coupling switching resonant circuit | |
| CN109728829B (en) | High-performance broadband radio frequency receiving module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |