CN108023562A - Areflexia lattice filter - Google Patents
Areflexia lattice filter Download PDFInfo
- Publication number
- CN108023562A CN108023562A CN201711361899.XA CN201711361899A CN108023562A CN 108023562 A CN108023562 A CN 108023562A CN 201711361899 A CN201711361899 A CN 201711361899A CN 108023562 A CN108023562 A CN 108023562A
- Authority
- CN
- China
- Prior art keywords
- network
- single port
- circuit sub
- areflexia
- port
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0153—Electrical filters; Controlling thereof
Landscapes
- Filters And Equalizers (AREA)
Abstract
The invention discloses a kind of areflexia lattice filter, including four independent single-port circuit sub-networks, input port, output ports, wherein each single port circuit sub-network is respectively provided with two endpoints；Four single ports circuit sub-network passes sequentially through respective endpoint and is linked in sequence in a ring, and an endpoint of the input port is connected to the public point of the first and second single port circuit sub-networks, and another endpoint of input port is connected to the public point of the third and fourth single port circuit sub-network；One endpoint of the output port be connected to second and the 3rd single port circuit sub-network public point, and another endpoint of output port be connected to first and the 4th single port circuit sub-network public point, to form lattice filter circuit.The present invention can flexibly realize all kinds of filter responses, realize unreflected high-performance filter response, and the wave filter which is suitable for various frequency ranges designs, and has the advantages that simple in structure, excellent performance.
Description
Technical field
The present invention relates to a kind of areflexia lattice filter, belong to the technical field of electronic circuit.
Background technology
Wave filter is a kind of electronic device, is widely used in various electronic systems.Such devices generally have two ports,
Allow the electric signal in the passband lossless or low damage pass through, and forbid electric signal in suppressed frequency band between two ports into
Row transmission.
Most wavenumber filter is reflective.In such wave filter, according to law of conservation of energy, the input electricity of input terminal
Signal is as in passband, being then transmitted to output terminal；When in stopband, being then all-trans and be incident upon input terminal, output terminal is without letter at this time
Number output.The signal power such as reflected is larger, is back to after input terminal, can cause uncertain shadow to circuit afterwards
Ring, can especially destroy the stability of active circuit.In addition, because the reflection between level can cause the deterioration that wave filter responds, reflection
The shortcomings that formula wave filter, further includes the response that cannot strengthen wave filter by directly cascading.
Reflectionless filter, as its name suggests, no matter in passband or stopband, the equal areflexia signal of its input terminal or very little,
And do not influence the transmission response in passband.Traditional reflectionless filter depends on some special network topology structures, is limited
In this, the species of its filter response is very limited, it is impossible to meets the needs of actual use.In addition, it can also add filter by isolator
Reflectionless filter is realized in the combination of ripple device, but wave filter at this time is orientation, and adds insertion loss.As traditional
Reflecting filter is the same, how to realize the reflectionless filter with customized responses, has great social demand, and one
The technical barrier that a industry is generally acknowledged.
The content of the invention
The technical problems to be solved by the invention are to overcome the deficiencies of the prior art and provide a kind of areflexia bridge-type filtering
Device, realizes the reflectionless filter with customizable response, and single to solve existing reflectionless filter response, design is cumbersome
The problems such as.
It is of the invention that above-mentioned technical problem is specifically solved using following technical scheme：
Areflexia lattice filter, including first to fourth independent single port circuit sub-network, input port, output terminal
Mouthful, wherein each single port circuit sub-network is respectively provided with two endpoints；Four single ports circuit sub-network passes sequentially through respectively
From endpoint be linked in sequence in a ring, and the input port an endpoint be connected to the first and second single port circuits
The public point of network, and another endpoint of input port is connected to the common port of the third and fourth single port circuit sub-network
Point；One endpoint of the output port be connected to second and the 3rd single port circuit sub-network public point, and output terminal
Mouthful another endpoint be connected to first and the 4th single port circuit sub-network public point, with form lattice filter electricity
Road.
Further, as a preferred technical solution of the present invention：Each single port circuit sub-network at least contains
There is a lossless device and at least one have consumption device.
Further, as a preferred technical solution of the present invention：The reference resistance of the input port and output port
It is anti-identical and be pure resistance.
Further, as a preferred technical solution of the present invention：Not phase in four single ports circuit sub-network
The network topology of two adjacent single port circuit sub-networks is identical with corresponding component value.
Further, as a preferred technical solution of the present invention：Not phase in four single ports circuit sub-network
The network topology of two adjacent single port circuit is different, and the input impedance in each frequency is identical.
Further, as a preferred technical solution of the present invention：The lossless device is selected to be made of following
Set：Inductor, capacitor, resonator, varactor, transmission line element, equivalent distributed device, discontinuity, draw
The ghost effect of line, the equivalent lossless device of single port and combinations thereof.
Further, as a preferred technical solution of the present invention：It is described to there is consumption element to be selected from by following collection formed
Close：Resistor, rheostat, single port areflexia network, the absorption network of single port, single port matched load, external circuit
The combination of the antenna and foregoing circuit after input port, matching after matching somebody with somebody.
Further, as a preferred technical solution of the present invention：The filter response of the lattice filter includes one
Rank wave filter, second order filter and higher order filter.
Further, as a preferred technical solution of the present invention：The filter response of the lattice filter includes low
Logical, band logical, high pass, band resistance, more band logicals, more band resistances and combinations thereof.
Further, as a preferred technical solution of the present invention：The lattice filter is used for same side
The lattice filter of mouth impedance is cascaded, to change filter response.
The present invention uses above-mentioned technical proposal, can produce following technique effect：
Input impedance value of the invention by rationally setting each single port circuit sub-network, can obtain a new class of without anti-
Formula wave filter is penetrated, can flexibly realize all kinds of filter responses, such as Bart irrigates hereby type, Chebyshev type and Elliptic Function Type,
It is suitable for various frequency ranges suitable for various filtering occasions, the structures such as low pass, band logical, high pass, band resistance, more band logicals and more band resistances
Wave filter designs, and has the advantages that simple in structure, excellent performance.
The areflexia lattice filter of the present invention has the characteristics that in Whole frequency band reflection coefficient be zero, is actually using
When, without consider filter cell to integrated circuit due to reflection and caused by harmful effect, can also easily cascade with into
One step improves the working performance of wave filter.Reflectionless filters different from existing reflectionless filter, being proposed in the present invention
Have the advantages that response can be customized arbitrarily.In theory, all circuits for being capable of physics realization are responded using in the present invention
Bridge architecture and sub-network collocation method realize areflexia.Furthermore it is possible to make full use of existing single port circuit network
The design data of Synthesized design method and traditional Two-port netwerk reflecting filter, realizes the quick design and system of reflectionless filter
Make.
Brief description of the drawings
Fig. 1 is the circuit module figure of areflexia lattice filter of the present invention.
Fig. 2 is the structure chart that single port circuit sub-network uses Two-port netwerk filter network in the present invention.
Fig. 3 (a) and Fig. 3 (b) be respectively in the embodiment of the present invention one single port circuit sub-network mutual antithesis is respectively adopted
The structure diagram using preferable lc circuit.Fig. 3 (c) is reflectionless filter of the embodiment of the present invention one using mutual antithesis
Structure diagram.
Fig. 4 is the simulated response curve for the reflectionless filter that the present invention is realized using preferable lc circuit.
Fig. 5 (a) and Fig. 5 (b) is respectively structure diagram of the embodiment of the present invention two using the transmission line sub-network of antithesis；
Fig. 5 (c) and Fig. 5 (d) is respectively the transmission circuit network structure diagram for having in the embodiment of the present invention two minor matters line in parallel；Fig. 5
(e) the reflectionless filter structure diagram realized for the embodiment of the present invention two using transmission line.
Fig. 6 is the response curve for the reflectionless filter that the present invention is realized using transmission line.
Embodiment
Embodiments of the present invention are described with reference to Figure of description.
As shown in Figure 1, the present invention devises areflexia lattice filter, include first to fourth four independent single-ports
Circuit sub-network, input port 5, output port 6, wherein the first single port circuit sub-network 1, the second single port circuit sub-network
2nd, the 3rd single port circuit sub-network 3, the 4th single port circuit sub-network 4 are respectively provided with two endpoints；Four single port electricity
Way network passes sequentially through respective endpoint and is linked in sequence in a ring, and an endpoint of the input port 5 is connected to
The public point of one single port circuit sub-network 1 and the second single port circuit sub-network 2, and another endpoint connection of input port
In the public point of the 3rd single port circuit sub-network 3 and the 4th single port circuit sub-network 4；One of the output port 6
Endpoint is connected to the public point of the second single port circuit sub-network 2 and the 3rd single port circuit sub-network 3, and output port 6
Another endpoint be connected to the public point of the first single port circuit sub-network 1 and the 4th single port circuit sub-network 4, foundation
Above-mentioned connection mode, to form lattice filter circuit.
Wherein, the input port 5 is identical with the reference impedance of output port 6, and is pure resistance, is denoted as R0；Four lists
The input impedance of port circuit sub-network 1,2,3 and 4 is remembered respectively successively：Z1、Z2、Z3And Z4.It is single-ended to realize filter function
In mouthful circuit sub-network 1,2,3 and 4, at least containing a lossless device and at least one there is consumption device.Therefore, Z1、Z2、
Z3And Z4It is the plural number that real part is always more than zero, and is the function of frequency.By rationally set each sub-network network topology and
Component value so that：
In the ideal case, on optional frequency f：
Under normal circumstances, then only need to be in required working frequency, including passband and stopband：
The design of reflectionless filter can be achieved.At this time, it is R to access resistance value in output port 60Load and excitation end
5 internal resistance is also R0When, the modulus value of the filter reflection coefficients | S11| it is zero or near zero, that is, realizes unreflected design.
And transmission coefficient S21It is numerically R to resistance value with the second single port circuit sub-network 2 or the 4th single port circuit sub-network 40
Load reflectance factor Γ2It is equal or roughly equal, i.e.,：
Upper limitation according to this, on the premise of port reference impedance determines, the transmission response of the wave filter is completely single by second
The input impedance Z of port circuit sub-network 22Determine.Z2It is the function of frequency, its characteristic is by the second single port circuit sub-network 2
Network topology structure and element value determine.According to circuit network comprehensive theory, by being carried out to target response function
Comprehensive design, can be derived that the topological structure and element value of the second single port circuit sub-network 2, as long as function to be integrated is expired
Sufficient physics can realize the property of circuit network, and specific comprehensive designing method is not thoroughly discussed herein.When the second single port
When 2 single reflectance factor of circuit sub-network is certain filter response, then the transmission response of overall network is also identical filtering
Response, while overall network reflectance factor is zero.
To meet Z1And Z3All frequencies fully or substantially on it is equal, can be by non-conterminous two single port circuits
Network topology is identical with corresponding component value used by sub-network.Following technological means can be used：First single port circuit
1 and the 3rd single port circuit sub-network 3 of network using the species of identical network topology and counter element, type, value,
Implementation is identical with type selecting.Or the network topology of non-conterminous two single port circuits is different, and in each frequency
Input impedance in rate is identical, can use following technological means：First single port circuit sub-network 1 and the 3rd single port circuit
Network 3 using different network topologies, after network equivalent, can accomplish in each frequency, the first single port electricity
The input impedance of way network 1 and the 3rd single port circuit sub-network 3 is identical.Each body of element during in view of specific implementation
Difference and various uncertainties, the input impedance of the first single port circuit sub-network 1 and the 3rd single port circuit sub-network 3 are done
To it is roughly the same also can, the reflectance factor of wave filter is close to zero at this time.
To meet Z2And Z4All frequencies fully or substantially on it is equal, can be by non-conterminous two single port circuits
Network topology is identical with corresponding component value used by sub-network.Following technological means can be used：Second single port circuit
2 and the 4th single port circuit sub-network 4 of network using the species of identical network topology and counter element, type, value,
Implementation is identical with type selecting；Or the network topology of non-conterminous two single port circuits is different, and in each frequency
Input impedance in rate is identical, can use following technological means：Second single port circuit sub-network 2 and the 4th single port circuit
Network 4 uses not exactly the same network topology, after network equivalent, can accomplish in each frequency, second is single-ended
Mouth circuit sub-network 2 is identical with the input impedance of the 4th single port circuit sub-network 4.Element during in view of specific implementation
Each body difference and various uncertainties, the input resistance of the second single port circuit sub-network 2 and the 4th single port circuit sub-network 4
It is anti-accomplish it is roughly the same also can, the reflectance factor of wave filter is close to zero at this time.
To meet Z1And Z2In the product and R of all frequencies0Square completely mutually or substantially etc., following technology hand can be used
Section：
The network topology using antithesis of first single port circuit sub-network 1 and the second single port circuit sub-network 2, example
Such as：Series and parallel exchanges；The species of counter element is exchanged at the same time：I.e. inductance capacitance exchanges, and resistance conductance is exchanged；Component value at the same time
To R0It is reciprocal each other after normalization.
The network topology of the use of first single port circuit sub-network 1 and the second single port circuit sub-network 2 not antithesis, leads to
Cross after network equivalent, can accomplish in each frequency, the first single port circuit sub-network 1 and the second single port circuit subnet
The product and R of the input impedance of network 20It is square equal.
During the realization of areflexia lattice filter, lossless element therein is selected from the collection being made of following device
Close：Equivalent lossless device of inductor, capacitor, resonator, varactor, transmission line element, single port and combinations thereof；Wherein
There is consumption element to be selected from the set that is made of following device：Resistor, rheostat, single port areflexia network, single port absorb
The combination of input port after formula network, single port matched load, external circuit matching, antenna and foregoing circuit after matching.
Each element can be definite value or tunable, to facilitate the later stage debugging to wave filter or change operating mode.
Combination of devices herein refers to multiple and different devices and forms a new simulator by modes such as in parallel, series connection and cascades
Part.
According to above description, the transmission response of areflexia lattice filter is completely by the second single port circuit sub-network 2 or the
The reflex response of four single port circuit sub-networks 4 determines.Therefore, particularly, when the realization side of the second single port circuit sub-network 2
Formula for terminating load traditional Two-port netwerk net resistance filter network 7 when, as shown in Fig. 2, the sound of this Two-port netwerk filter network 7
There should be one-to-one relation with the transmission response of the areflexia lattice filter of synthesis, this is involved in a kind of present invention
The simplification design method of reflectionless filter.Specifically, when the transmission response of Two-port netwerk filter network 7 be respectively low pass, band logical,
When high pass, band resistance, more band logicals and more band resistances, after termination matching load, according to the reflection of law of conservation of energy, then its other end
It is respectively high pass, band resistance, low pass, band logical, more band resistances and more band logicals that coefficient, which is rung,.At this time, according to the Two-port netwerk of this terminating load
Filter network 7 is used as the second single port circuit sub-network 2 or the 4th single port circuit sub-network 4, correspondingly, the first single port is electric
1 or the 3rd single port circuit sub-network 3 of way network takes the dual network of Two-port netwerk filter network 7, then this areflexia bridge-type is filtered
The transmission response of ripple device is also respectively high pass, band resistance, low pass, band logical, more band resistances and more band logicals.Based on above-mentioned consideration, areflexia
The design of bridge-type filtering can be used for reference to be designed with reference to existing, ripe reflective Two-port netwerk wave filter.In the case of more common,
The design of second single port circuit sub-network 2 can be from the limitation of reflective Two-port netwerk wave filter design, more flexibly
Freely, therefore, areflexia lattice filter is than the transmission response more horn of plenty of conventional reflective Two-port netwerk wave filter, and design is more
Flexibly.
Preferably, the overall filter response of areflexia lattice filter can be the wave filter of single order, second order and high-order, this
The exponent number at place refers to the minimum value in the exponent number of single port circuit sub-network.
Between areflexia lattice filter with identical response can it is parallel with one another or series connection, carry out power expansion
Hold, after the load resistance value of change port accordingly, have no effect on unreflected property, and filter response and original identical.
For example, after two wave filter parallel connections of the same race with reference to 50Ohm impedances, reference impedance is changed into 25Ohm, and filter response is constant.
It can improve filter response or generation by cascading between areflexia lattice filter with identical port Impedance
Increasingly complex filter response, unreflected property are constant.For example, by cascading two identical areflexias of port Impedance
Wave filter can produce more precipitous and deeper Out-of-band rejection, and insertion loss also accordingly becomes higher.For another example, cascaded lowpass and height are passed through
Logical reflectionless filter, it is possible to achieve bandpass filter.Areflexia property is constant in above-mentioned two.
The reflectionless filter of the present invention has the characteristics that in Whole frequency band reflection coefficient be zero, in actual use, nothing
Need to consider filter cell to integrated circuit due to reflection and caused by harmful effect, can also easily cascade further to change
The working performance of kind wave filter.
In order to verify that the present invention can realize the reflectionless filter with customizable response, spy's row for two example two into
Row explanation.
Embodiment one,
In the present embodiment, as shown in Fig. 2, each single port circuit sub-network make use of the reflective filter of the Two-port netwerk of terminating load
Ripple device network 7 is realized that the present invention is not limited thereof.
The port reference impedance of 50Ohm, i.e. R are employed in the present embodiment0=50 Ω, the present invention are not limited thereof.
In the present embodiment, employ based on lamped element elliptic Function Bandpass Filters design, the present invention not to its into
Row limits.
In the present embodiment, identical single port circuit sub-network circuit design, i.e. the first single port circuit are employed
1 or the 3rd single port circuit sub-network 3 of sub-network is identical, the second single port circuit sub-network 2 or the 4th single port circuit
Sub-network 4 is identical, and the present invention is not limited thereof.
In the present embodiment, the design of adjacent single port circuit sub-network circuit antithesis each other, i.e. the first single port are employed
1 and second single port circuit sub-network of circuit sub-network, 2 mutual antithesis, the present invention are not limited thereof.
In the present embodiment, design object be lumped parameter (standard) elliptic Function Bandpass Filters, center operating frequency
In 1GHz, with respect to bandwidth of operation 4%.Second single port circuit sub-network 2 is to port reference impedance R0The reflex response of=50Ohm
The transmission response of as overall filter network.Therefore, when the reflex response of the second single port circuit sub-network 2 is oval for (standard)
Function bandpass filter, and when circuit element is lumped parameter formula, you can meet design requirement.Consider for design is simplified,
Specific implementation method of the Two-port netwerk filter network of maturation as the second single port circuit sub-network 2 is employed in this sample,
As shown in Figure 2.When the termination 50Ohm loads of this Two-port netwerk filter network 7, that is, constitute single port circuit sub-network circuit.
When 7 reflex response of Two-port netwerk filter network of terminating load is (standard) elliptic Function Bandpass Filters, according to the conservation of energy
Relational expression can show that the transmission response of Two-port netwerk filter network 7 at this time should be (standard) elliptic function bandstop filter.Cause
This, need to only design satisfactory (standard) elliptic function bandstop filter, and realize using lumped-parameter element, you can complete
The design of second single port circuit sub-network 2.
To simplify overall circuit design, in specific implementation process, the present embodiment employs identical and antithesis
Single port circuit sub-network designs, i.e., non-conterminous single port circuit sub-network is identical, and adjacent single port circuit sub-network is complete
Full antithesis, 8 and 9 its structure of single port circuit sub-network is respectively as shown in Fig. 3 (a) and Fig. 3 (b).The wave filter being finally completed
Shown in circuit structure diagram such as Fig. 3 (c).In the filter circuit, four single port circuit sub-networks are reduced to two kinds, both
Between mutual antithesis, i.e. single port circuit sub-network 8 and 9 in Fig. 3, wherein, the value of each element is as shown in table 1.
Table 1
Using ADS simulation softwares, emulation is simulated to foregoing circuit schematic diagram, obtained S parameter curve such as Fig. 4 institutes
Show.From transmission coefficient S21Curve is understood, at 1.0GHz, which forms a passband, its bandwidth is 4% or so, together
When also possess two out-of-band transmission zero points, meet design requirement.The artificial reflections coefficient S of the wave filter11It is small in Whole frequency band
In -100dB, unreflected property is demonstrated.
Embodiment two,
In the present embodiment, as shown in Fig. 5 (e), using desired transmission cable architecture, the present invention devises a kind of areflexia filtering
Device, including：Input port 5 and output port 6, two single port transmission line sub-networks 12 and 13；Its bridge-type connection mode is the same as real
Example 1 is applied, is no longer described in detail herein, such as Fig. 1.The specific design method of such line filter is briefly described below.
This implementation sample target is the areflexia bandpass filter of transmission line structure, to simplify design cycle, this implementation sample
Example employs the terminal load and input/output referencing port that normalized impedance is 1Ohm；It is mutually right to employ sub-network
Even, the non-conterminous identical overall network design of sub-network.The present invention is not limited thereof.
As shown in Fig. 5 (a), transmission line sub-network 10 is that the transmission line of generation is directly converted using Richard (Richard)
Network, its prototype are the three rank chebyshev function low-pass filter of Two-port netwerk of single-termination load, its component value is normalized value.
The reflection coefficient curve of the network 10 can be considered a bandpass filter.Using Dual Principle, can directly generate corresponding another
Transmission line sub-network 11, this network is also three rank chebyshev function low-pass filters of terminating load, such as Fig. 5 (b).
Converted using black field (Kuroda), transmission line sub-network 10 and 11 can be converted into minor matters line only in parallel
Transmission circuit network, forms the transmission circuit network 12 such as Fig. 5 (c) and the transmission circuit network 13 such as Fig. 5 (d), transmission at this time respectively
Each reactance component is separated by unit element in gauze network, is conducive to microwave realization.
Particularly, after Kuroda transform, transmission circuit network 12 and 13 has not been proper in structure
Dual network, simply its input impedance is reciprocal each other.The element value of above-mentioned each circuit network refers to table 2.
Table 2
Transmission circuit network 12 and 13 is bridged in the way of in Fig. 5 (e), while port Impedance is arranged to 1Ohm,
It can complete the prototype of transmission line type band logical (high pass) wave filter., first, need to be by respectively when practical filter processing is realized
The characteristic impedance of element transmission line carries out renormalization operation using desired reference impedance, such as：50Ohm, the present invention be not right
It describes in detail.During physics realization, microstrip line, coaxial line, the line of rabbet joint, co-planar waveguide, two-sided parallel strips etc. can be used
Transmission line is designed, and Mixed Design can be also carried out to it, and the present invention is not limited it.
As shown in fig. 6, using ADS softwares, the complete response of the circuit can be obtained.There is a passband at 1GHz,
In the amplitude S of Whole frequency band reflection coefficient11Respectively less than -70dB, close to areflexia, herein the undesirable property of reflectance factor be by
Caused by truncated error when line characteristic impedance is being calculated, impedance value precision is emulated by improving, can be reduced anti-
Penetrate coefficient.Similarly, in actual circuit processing and fabricating, the size of above-mentioned reflectance factor is related with machining accuracy, and with designing nothing
Close.
To sum up, the bandpass filter of the invention based on transmission line structure can realize that unreflected high-performance filtering is rung
Should, it is simple in structure with being zero in Whole frequency band reflection coefficient, the advantages that excellent performance.This present invention has widely
Application prospect.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementation
Mode, within the knowledge of a person skilled in the art, can also be on the premise of present inventive concept not be departed from
Make a variety of changes.
Claims (10)
1. areflexia lattice filter, it is characterised in that including first to fourth independent single port circuit sub-network, input terminal
Mouth, output port, wherein each single port circuit sub-network is respectively provided with two endpoints；Four single port circuit sub-networks according to
It is secondary to be linked in sequence in a ring by respective endpoint, and to be connected to first and second single-ended for an endpoint of the input port
The public point of mouth circuit sub-network, and another endpoint of input port is connected to the third and fourth single port circuit sub-network
Public point；One endpoint of the output port be connected to second and the 3rd single port circuit sub-network public point, and
Another endpoint of output port be connected to first and the 4th single port circuit sub-network public point, with form bridge-type filtering
Device circuit.
2. areflexia lattice filter according to claim 1, it is characterised in that：Each single port circuit sub-network is extremely
Containing a lossless device and at least one there is consumption device less.
3. areflexia lattice filter according to claim 1, it is characterised in that：The ginseng of the input port and output port
It is identical and be pure resistance to examine impedance.
4. areflexia lattice filter according to claim 1, it is characterised in that：In four single ports circuit sub-network
The network topology of non-conterminous two single ports circuit sub-network is identical with corresponding component value.
5. areflexia lattice filter according to claim 1, it is characterised in that：In four single ports circuit sub-network
The network topology of non-conterminous two single port circuits is different, and the input impedance in each frequency is identical.
6. areflexia lattice filter according to claim 2, it is characterised in that：The lossless device is selected from by following structures
Into set：It is inductor, capacitor, resonator, varactor, transmission line element, equivalent distributed device, discontinuous
Property, the ghost effect of lead, the equivalent lossless device of single port and combinations thereof.
7. areflexia lattice filter according to claim 2, it is characterised in that：It is described have consumption element be selected from be made of following
Set：Resistor, rheostat, single port areflexia network, the absorption network of single port, single port matched load, external electrical
The combination of the antenna and foregoing circuit after input port, matching after the matching of road.
8. areflexia lattice filter according to claim 1, it is characterised in that：The overall filtering of the lattice filter is rung
It should include firstorder filter, second order filter and higher order filter.
9. areflexia lattice filter according to claim 1, it is characterised in that：The transmission response bag of the lattice filter
Include low pass, band logical, high pass, band resistance, more band logicals, more band resistances and combinations thereof.
10. areflexia lattice filter according to claim 1, it is characterised in that：The lattice filter be used for
The lattice filter of identical port Impedance is cascaded, to change filter response.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711361899.XA CN108023562A (en) | 2017-12-18 | 2017-12-18 | Areflexia lattice filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711361899.XA CN108023562A (en) | 2017-12-18 | 2017-12-18 | Areflexia lattice filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108023562A true CN108023562A (en) | 2018-05-11 |
Family
ID=62074101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711361899.XA Pending CN108023562A (en) | 2017-12-18 | 2017-12-18 | Areflexia lattice filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108023562A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004912A (en) * | 2018-07-18 | 2018-12-14 | 南京邮电大学 | The low reflection-absorption formula filter of symmetrical dual-port |
| CN109217836A (en) * | 2018-09-03 | 2019-01-15 | 南京邮电大学 | Four port low-reflection type duplexer filters |
| CN109742497A (en) * | 2019-02-28 | 2019-05-10 | 南京邮电大学 | A kind of four port reflectionless filter of transmission line |
| CN109871573A (en) * | 2018-12-27 | 2019-06-11 | 西北核技术研究所 | A kind of modeling method of No. eight power combiner |
| CN113346860A (en) * | 2021-05-12 | 2021-09-03 | 南京邮电大学 | Bandwidth-adjustable non-reflection filter of open-circuit short-circuit mixed branch transmission line |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201203506Y (en) * | 2008-05-28 | 2009-03-04 | 苏州试验仪器总厂 | Power output circuit of electric oscillating table |
| CN101694898A (en) * | 2009-10-16 | 2010-04-14 | 南京邮电大学 | Bimodule annular resonant cavity band-pass filter with direct feed planar structure |
| CN102323645A (en) * | 2011-05-11 | 2012-01-18 | 上海大学 | Mach-Zehnder interferometer-type optical trap filter based on dual-loop coupling structures |
| CN102365784A (en) * | 2009-02-09 | 2012-02-29 | 联合大学公司 | Reflectionless filters |
| US20160381745A1 (en) * | 2015-06-26 | 2016-12-29 | EPtronics, Inc. | Led driver which can be used with either trailing edge or leading edge dimmers |
| CN106840470A (en) * | 2017-01-19 | 2017-06-13 | 北京机械设备研究所 | A kind of bridge type pressure sensor output signal harvester and method |
-
2017
- 2017-12-18 CN CN201711361899.XA patent/CN108023562A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201203506Y (en) * | 2008-05-28 | 2009-03-04 | 苏州试验仪器总厂 | Power output circuit of electric oscillating table |
| CN102365784A (en) * | 2009-02-09 | 2012-02-29 | 联合大学公司 | Reflectionless filters |
| CN101694898A (en) * | 2009-10-16 | 2010-04-14 | 南京邮电大学 | Bimodule annular resonant cavity band-pass filter with direct feed planar structure |
| CN102323645A (en) * | 2011-05-11 | 2012-01-18 | 上海大学 | Mach-Zehnder interferometer-type optical trap filter based on dual-loop coupling structures |
| US20160381745A1 (en) * | 2015-06-26 | 2016-12-29 | EPtronics, Inc. | Led driver which can be used with either trailing edge or leading edge dimmers |
| CN106840470A (en) * | 2017-01-19 | 2017-06-13 | 北京机械设备研究所 | A kind of bridge type pressure sensor output signal harvester and method |
Non-Patent Citations (1)
| Title |
|---|
| 金秀华: "小型环形结构微波滤波器研究", 《中国博士学位论文全文数据库 信息科技辑》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004912A (en) * | 2018-07-18 | 2018-12-14 | 南京邮电大学 | The low reflection-absorption formula filter of symmetrical dual-port |
| CN109217836A (en) * | 2018-09-03 | 2019-01-15 | 南京邮电大学 | Four port low-reflection type duplexer filters |
| CN109217836B (en) * | 2018-09-03 | 2022-05-31 | 南京邮电大学 | Four-port low-reflection duplex filter |
| CN109871573A (en) * | 2018-12-27 | 2019-06-11 | 西北核技术研究所 | A kind of modeling method of No. eight power combiner |
| CN109871573B (en) * | 2018-12-27 | 2022-11-04 | 西北核技术研究所 | Modeling method of eight-path power synthesizer |
| CN109742497A (en) * | 2019-02-28 | 2019-05-10 | 南京邮电大学 | A kind of four port reflectionless filter of transmission line |
| CN113346860A (en) * | 2021-05-12 | 2021-09-03 | 南京邮电大学 | Bandwidth-adjustable non-reflection filter of open-circuit short-circuit mixed branch transmission line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108023562A (en) | Areflexia lattice filter | |
| JP6652970B2 (en) | Transmission line anti-reflection filter | |
| US10230348B2 (en) | Sub-network enhanced reflectionless filter topology | |
| US10516378B2 (en) | Optimal response reflectionless filter topologies | |
| CN105529515B (en) | A kind of tunable band-pass bandstop filter based on open circuit minor matters loading | |
| CN109742497A (en) | A kind of four port reflectionless filter of transmission line | |
| CN104078726B (en) | Parallel connection type one side elliptic function line filter | |
| Hagensen | NARROWBAND MICROWAVE BANDPASS FILTER DESIGN BY COUPLING MATRIX SYNTHESIS. | |
| CN107565929B (en) | Filter generalized synthesis method | |
| Sarkar | Sharp Rejection Wideband Band Pass Filter in Suspended Substrate Stripline Realization | |
| CN102622492A (en) | Method for constructing planar microstrip Marchand balun equivalent circuit model | |
| CN104078727B (en) | Tandem type one side elliptic function line filter | |
| CN113435147B (en) | Lumped parameter negative group delay circuit and chip | |
| He et al. | Input-Absorptive Quasi-Elliptic-Type Cavity Bandpass Filter Design | |
| CN209046602U (en) | A kind of absorption-type low-pass filter | |
| Macchiarella et al. | Synthesis of microwave duplexers using fully canonical microstrip filters | |
| Macchiarella et al. | Synthesis of microwave filters with “reactive” nodes | |
| CN104577273B (en) | Plane low pass band logical double frequency filter | |
| Hu et al. | Dual-port Quasi-absorptive Microstrip Bandpass Filters with Excellent All-band Reflectionless | |
| Ulinic | Advanced filter response based on the reflectionless concept | |
| Ariturk et al. | Cross-Coupling Simplification in Asymmetric Acoustic-Electromagnetic Filters | |
| Ma et al. | High Isolation Integrated Passive Micro-Diplexer with Low Loss for Mobile Communication Applications | |
| Yuan et al. | Novel Bandstop Filter with Improved Flat NGD Characteristics and Signal Attenuation in Passband | |
| CN117131835A (en) | Modeling method for complex four-wire electromagnetic hybrid coupling structure and chip structure | |
| Li et al. | Design of the micro lumped balun based on LTCC technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180511 |
|
| RJ01 | Rejection of invention patent application after publication |