CN106025471A - Balanced filter branch line coupler - Google Patents
Balanced filter branch line coupler Download PDFInfo
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- CN106025471A CN106025471A CN201610343673.6A CN201610343673A CN106025471A CN 106025471 A CN106025471 A CN 106025471A CN 201610343673 A CN201610343673 A CN 201610343673A CN 106025471 A CN106025471 A CN 106025471A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
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Abstract
The invention discloses a balanced filter branch line coupler, and aims at solving the technical problems that the balanced filter branch line coupler in the prior art is of a dual-layer design and is complicated in structure and high in cost, and the frequency selectivity needs to be improved. The coupler comprises eight single ports (1-8), four half-wave coupled transmission lines (10, 20, 30 and 40) for connecting the single ports, and four quarter-wave uncoupled transmission lines (50, 60, 70 and 80) for connecting differential ports, wherein the single ports (1 and 2) form the differential port (A); the single ports (3 and 4) form the differential port (B); the single ports (5 and 6) form the differential port (C); and the single ports (7 and 8) form the differential port (D). The structure of the coupler is simplified and the processing cost is reduced when power distribution, filter processing and common-mode signal suppression on differential signals are achieved; and the technical effect of higher frequency selectivity can be obtained.
Description
Technical field
The present invention relates to technology for radio frequency field, particularly relate to a kind of balanced type filtering branch line bonder.
Background technology
Nowadays, along with the fast development of RF communication system, neutrodyne circuit is due to its electromagnetism interference energy
Power is strong, common mode inhibition good and facilitates with other neutrodyne circuit and the advantage such as is connected and is used widely.Branch
Line bonder as a class device important in microwave system, it be capable of microwave signal is carried out power with
Phase assignments, is realizing the microwave components of various function, in feeding network and complete machine, is playing important
Effect.Therefore, the design of balanced type branch line coupler seems critically important.
It addition, Combined design has more advantage in terms of multifunctional unit, its reason is that Combined design is permissible
Realize the multi-functional fusion of device, promote further miniaturization and integrated.Therefore, at balanced type branch line
In coupler design, for integrating filtering function, usually carry out Combined design.In recent years, existing balanced type
The relevant report of branch line coupler design, and the balanced type branch line constituted with four sections of coupled transmission lines is proposed
The design of bonder, but there is the defect not having common mode inhibition in it；This is pressed down to obtain high common mode
System and the bonder of fused filtering function, coupled structure is used to substitute coupled transmission line, its frequency selectivity
And common mode inhibition is greatly improved, but this type of design is all double layer design and structure complexity, cost height, frequency
Selectivity also has room for promotion.There is presently no the phase of single layer structure balanced type filtering branch line coupler design
Close report, it is proposed that a kind of altofrequency selective monolayer balanced type filtering branch line bonder is to have very much
Necessary.
Summary of the invention
The present invention is directed to present in prior art, balanced type filtering branch line bonder is double layer design and knot
Structure is complicated, cost is high, frequency selectivity has technical problem to be hoisted, it is provided that putting down of a kind of single layer structure
Weighing apparatus formula filtering branch line bonder, it is achieved differential signal is carried out power distribution, Filtering Processing and common-mode signal
While suppression, simplify the structure of bonder, reduce processing cost and be obtained in that higher frequency selectivity
Technique effect.
Embodiments provide a kind of balanced type filtering branch line bonder, including:
The most spaced first single port, the second single port, the 3rd single port, the 4th single port,
Five single port, the 6th single port, the 7th single port and the 8th single port；
Described first single port is connected by the first transmission line with described second single port, described 3rd single port
Being connected by the second transmission line with described 4th single port, described 5th single port is led to described 6th single port
Crossing the 3rd transmission line to connect, described 7th single port is connected by the 4th transmission line with described 8th single port；
Wherein, described first is half-wavelength coupled transmission line to described 4th transmission line, and electrical length is first
Electrical length；
Described first single port and described second single port constitute the first difference port, described 3rd single port and
Described 4th single port constitutes the second difference port, and described 5th single port and described 6th single port constitute the
Three difference ports, described 7th single port and described 8th single port constitute the 4th difference port；
It is connected by the 5th transmission line between described first difference port with described second difference port, described
It is connected by the 6th transmission line between two difference ports with described 3rd difference port, described 3rd difference port
It is connected by the 7th transmission line with between described 4th difference port, described 4th difference port and described first
Connected by the 8th transmission line between difference port；Wherein, the described 5th it is four to described 8th transmission line
The non-coupled transmission line of/mono-wavelength, the electrical length of described 5th transmission line and described 7th transmission line is
Second electrical length, the electrical length of described 6th transmission line and described 8th transmission line is the 3rd electrical length.
Optionally, in described first to the 8th single port, the impedance of either port is 50 ohm, described first
Electrical length is specially 180 °, and described second electrical length is specially 90 °, and described 3rd electrical length is specially
90°。
Optionally, arbitrary described half-wavelength coupled transmission line includes: the first line segment, the second line segment and the 3rd line
Section；Described first line segment and described second line segment are arranged in same aspect, and described first line segment and described
A gap it is provided with between second line segment；Described 3rd line segment is arranged in another aspect；Described first line segment
With described second line segment arrange position and described 3rd line segment to arrange position relative.
Optionally, a length of first length of described first line segment, a length of the second of described second line segment is long
Degree, a length of 3rd length of described 3rd line segment；Described first length, the width in described gap and described
The summation of the second length three is equal with described 3rd length.
Optionally, described first difference port is connected with the signal input port of described bonder, and described
Two difference ports, described 3rd difference port and described 4th difference port all with the signal of described bonder
Output port is connected；Wherein, described 4th difference port is as isolated port.
Optionally, by the signal input port using described first difference port as described bonder, described
Second difference port, as the signal output port of described bonder, forms the first transmission for transmitting signal
Channel；By the signal input port using described first difference port as described bonder, described 3rd poor
Divide port as the signal output port of described bonder, form the second transmission channel for transmitting signal；
Described first transmission channel and described second transmission channel are respectively provided with four transmission zeros；By regulation
The odd, even mould impedance of described first transmission line, controls to adjust the bandwidth of described first transmission channel, described
The bandwidth of the second transmission channel, described first transmission channel fractional transmission zero point position and described second pass
The position of the fractional transmission zero point of defeated channel.
Optionally, by regulating the odd, even mould impedance of described second transmission line, described first is controlled to adjust
The bandwidth of transmission channel and the position of the fractional transmission zero point of described first transmission channel.
Optionally, by regulating the odd, even mould impedance of described 3rd transmission line, described second is controlled to adjust
The position of the fractional transmission zero point of transmission channel.
Optionally, by regulating the odd, even mould impedance of described 4th transmission line, described second is controlled to adjust
The bandwidth of transmission channel and the isolation of described 4th difference port.
Optionally, by regulation the described 5th to the impedance of at least one transmission line in described 8th transmission line, come
Control the power output ratio of the signal output port of described bonder.
The one or more technical schemes provided in the present invention, at least have the following technical effect that or advantage:
Due in the present invention, balanced type filtering branch line bonder, including: the most spaced
One single port, the second single port, the 3rd single port, the 4th single port, the 5th single port, the 6th single port,
7th single port and the 8th single port；Described first single port and described second single port are by the first transmission line
Connecting, described 3rd single port is connected by the second transmission line with described 4th single port, described 5th single-ended
Mouth is connected by the 3rd transmission line with described 6th single port, described 7th single port and described 8th single port
Connected by the 4th transmission line；Wherein, described first it is half-wavelength coupled transfer to described 4th transmission line
Line；Described first single port and described second single port constitute the first difference port, described 3rd single port and
Described 4th single port constitutes the second difference port, and described 5th single port and described 6th single port constitute the
Three difference ports, described 7th single port and described 8th single port constitute the 4th difference port；Described first
Be connected by the 5th transmission line between difference port with described second difference port, described second difference port with
Being connected by the 6th transmission line between described 3rd difference port, described 3rd difference port is 4th poor with described
Divide and connected by the 7th transmission line, between described 4th difference port and described first difference port between port
Connected by the 8th transmission line；Wherein, the described 5th it is quarter-wave to described 8th transmission line
Non-coupled transmission line.It is to say, by building monolayer balanced type filtering branch line coupler structure, and
Merge balanced type filter structure thereon, it is achieved differential signal is carried out power distribution, Filtering Processing and common mode
While signal suppression, simplify bonder structure, reduce processing cost and this design have many transmission zeros,
The technique effect that frequency selectivity is good.Efficiently solving balanced type branch line filter couplers is double layer design
And structure is complicated, cost is high, frequency selectivity has technical problem to be hoisted.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only embodiments of the invention, for those of ordinary skill in the art, do not paying wound
On the premise of the property made work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.
The structural representation of a kind of balanced type filtering branch line bonder that Fig. 1 provides for the embodiment of the present invention；
The structural representation of the half-wavelength coupled transmission line that Fig. 2 provides for the embodiment of the present invention；
The balanced type filter of the half-wavelength coupled transmission line shown in employing Fig. 2 that Fig. 3 provides for the embodiment of the present invention
The structural representation of wavelength-division branch-line coupler；
The scale diagrams of a kind of balanced type filtering branch line bonder that Fig. 4 provides for the embodiment of the present invention；
The emulation differential-mode response of a kind of balanced type filtering branch line bonder that Fig. 5 provides for the embodiment of the present invention
Figure；
Two difference output of a kind of balanced type filtering branch line bonder that Fig. 6 provides for the embodiment of the present invention
The emulation phase contrast response diagram of port；
The emulation common-mode response of a kind of balanced type filtering branch line bonder that Fig. 7 provides for the embodiment of the present invention
Figure.
Detailed description of the invention
The embodiment of the present invention, by providing a kind of balanced type filtering branch line bonder, solves in prior art
Balanced type branch line filter couplers is that double layer design and structure are complicated, cost is high, frequency selectivity needs to be carried
The technical problem risen, it is achieved that differential signal is carried out power distribution, Filtering Processing and common-mode signal suppression
Meanwhile, simplify the structure of bonder, reduce processing cost and be obtained in that the technology of higher frequency selectivity
Effect.
The technical scheme of the embodiment of the present invention is for solving above-mentioned technical problem, and general thought is as follows:
Embodiments provide a kind of balanced type filtering branch line bonder, including: interval sets successively
The first single port of putting, the second single port, the 3rd single port, the 4th single port, the 5th single port, the 6th
Single port, the 7th single port and the 8th single port；Described first single port and described second single port are by the
One transmission line connects, and described 3rd single port is connected by the second transmission line with described 4th single port, described
5th single port is connected by the 3rd transmission line with described 6th single port, described 7th single port and described the
Eight single port are connected by the 4th transmission line；Wherein, described first it is half-wavelength to described 4th transmission line
Coupled transmission line, and electrical length is the first electrical length；Described first single port and described second single port structure
Becoming the first difference port, described 3rd single port and described 4th single port constitute the second difference port, described
5th single port and described 6th single port constitute the 3rd difference port, described 7th single port and the described 8th
Single port constitutes the 4th difference port；By the between described first difference port and described second difference port
Five transmission lines connect, between described second difference port and described 3rd difference port by the 6th transmission line even
Connecing, described 3rd difference port is connected by the 7th transmission line between described 4th difference port, and described
It is connected by the 8th transmission line between four difference ports with described first difference port；Wherein, the described 5th to
Described 8th transmission line is quarter-wave non-coupled transmission line, described 5th transmission line and described
The electricity that the electrical length of seven transmission lines is the second electrical length, described 6th transmission line and described 8th transmission line is long
Degree is the 3rd electrical length.
Visible, in embodiments of the present invention, tie by building monolayer balanced type filtering branch line bonder
Structure, and merge balanced type filter structure thereon, it is achieved differential signal is carried out at power distribution, filtering
While reason and common-mode signal suppression, simplify the structure of bonder, reduction processing cost and this design and have many
The technique effect that transmission zero, frequency selectivity are good.Efficiently solve balanced type branch line filter couplers
, cost height, frequency selectivity complicated for double layer design and structure have technical problem to be hoisted.
In order to be better understood from technique scheme, below in conjunction with Figure of description and concrete embodiment party
Technique scheme is described in detail by formula, it should be understood that the tool in the embodiment of the present invention and embodiment
Body characteristics is to describe technical scheme in detail rather than restriction to technical scheme,
In the case of not conflicting, the technical characteristic in the embodiment of the present invention and embodiment can be mutually combined.
Embodiment one
Refer to Fig. 1, embodiments provide a kind of balanced type filtering branch line bonder, including:
The most spaced first single port the 1, second single port the 2, the 3rd single port the 3, the 4th single port
4, the 5th single port the 5, the 6th single port the 6, the 7th single port 7 and the 8th single port 8；Wherein, first
To the 8th single port (1～8), the impedance of either port is 50 ohm；
First single port 1 is connected by the first transmission line 10 with the second single port 2, the 3rd single port 3 with
4th single port 4 is connected by the second transmission line 20, and the 5th single port 5 and the 6th single port 6 pass through the
Three transmission lines 30 connect, and the 7th single port 7 is connected by the 4th transmission line 40 with the 8th single port 8；Its
In, first to fourth transmission line (10,20,30,40) is half-wavelength coupled transmission line, and electrical length
It is the first electrical length (concretely 180 °)；
First single port 1 and the second single port 2 constitute the first difference port A, the 3rd single port 3 and the 4th
Single port 4 constitutes the second difference port B, and the 5th single port 5 and the 6th single port 6 constitute the 3rd differential ends
Mouth C, the 7th single port 7 and the 8th single port 8 constitute the 4th difference port D；
Being connected by the 5th transmission line 50 between first difference port A and the second difference port B, second is poor
Connected by the 6th transmission line 60 point between port B and the 3rd difference port C, the 3rd difference port C with
Connected by the 7th transmission line 70 between 4th difference port D, the 4th difference port D and the first differential ends
Connected by the 8th transmission line 80 between mouth A；Wherein, the 5th to the 8th transmission line (50,60,70,
80) it is quarter-wave non-coupled transmission line, the 5th transmission line 50 and the electricity of the 7th transmission line 70
Length is the second electrical length (concretely 90 °), the 6th transmission line 60 and the electricity of the 8th transmission line 80
Length is the 3rd electrical length (concretely 90 °).
Refer to Fig. 2, in a kind of detailed description of the invention of the application, arbitrary described half-wavelength coupled transfer
Line includes: the first line segment a, the second line segment b and the 3rd line segment c；
First line segment a and the second line segment b is arranged in same aspect P1, and the first line segment a and the second line
It is provided with a gap d between section b；3rd line segment c is arranged in another aspect P2；First line segment a and
Two line segment b are arranged in the primary importance of aspect P1, and the 3rd line segment c is arranged on the second position of aspect P2
On, described primary importance is relative with the described second position.In specific implementation process, aspect P1 and aspect
P2 can be interval and two parallel aspects；A length of first length of the first line segment a, the second line segment b
A length of second length, a length of 3rd length of the 3rd line segment c, described first length, gap d
The summation of width and described second length three is equal with described 3rd length.
Further, refer to Fig. 3, first to described 4th transmission line (10,20,30,40) be as
The coupled transmission line of the structure shown in Fig. 2.Concrete, the first transmission line 10 include line segment 11, line segment 12,
Line segment 13 and gap 14；Second transmission line 20 includes line segment 21, line segment 22, line segment 23 and gap 24；
3rd transmission line 30 includes line segment 31, line segment 32, line segment 33 and gap 34；4th transmission line 40 includes
Line segment 41, line segment 42, line segment 43 and gap 44；Wherein, line segment (11,21,31,41) is the most right
Answer the first line segment a in Fig. 2, the second line segment in line segment (12,22,32,42) corresponding diagram 2 respectively
B, the 3rd line segment c in line segment (13,23,33,43) respectively corresponding diagram 2, gap (14,24,34,
44) gap d in difference corresponding diagram 2.The odd mode impedance of the first transmission line 10 is Zo1, even mode impedance be
Ze1, the odd mode impedance of the second transmission line 20 is Zo2, even mode impedance be Ze2, the strange mould of the 3rd transmission line 30
Impedance is Zo3, even mode impedance be Ze3, the odd mode impedance of the 4th transmission line 40 is Zo4, even mode impedance be
Ze4。
In specific implementation process, the signal input port phase of the first difference port A and described bonder
Even, the second difference port B, the 3rd difference port C and the 4th difference port D all with the letter of described bonder
Number output port is connected；Wherein, the 4th difference port D is as isolated port.
Concrete, by the signal input port using the first difference port A as described bonder, second poor
Divide port B as the signal output port of described bonder, form the first transmission channel for transmitting signal
CBA；By the signal input port using the first difference port A as described bonder, the 3rd difference port
C, as the signal output port of described bonder, forms the second transmission channel C for transmitting signalCA；
First transmission channel CBAWith the second transmission channel CCAIt is respectively provided with (two the outside transmission of four transmission zeros
Zero point and two transmitted inwards zero points).It is noted that
(1) by regulating the odd, even mould impedance Z of the first transmission line 10o1、Ze1, control to adjust first
Transmission channel CBABandwidth, the second transmission channel CCABandwidth, the first transmission channel CBAPart pass
The position of defeated zero point (concretely two outside transmission zeros) and the second transmission channel CCAFractional transmission
The position of zero point (concretely two outside transmission zeros)；
(2) by regulating the odd, even mould impedance Z of the second transmission line 20o2、Ze2, control to adjust first
Transmission channel CBABandwidth, the first transmission channel CBAFractional transmission zero point (concretely two inner sides
Transmission zero) position and the second transmission channel CCABandwidth；
(3) by regulating the odd, even mould impedance Z of the 3rd transmission line 30o3、Ze3, control to adjust second
Transmission channel CCAThe position of fractional transmission zero point (concretely two outside transmission zero)；
(4) by regulating the odd, even mould impedance Z of the 4th transmission line 40o4、Ze4, control to adjust second
Transmission channel CCABandwidth and the isolation of the 4th difference port D.
It addition, by least one transmission in regulation the 5th to described 8th transmission line (50,60,70,80)
The impedance of line, controls the power output ratio of the signal output port of described bonder, such as, by adjusting
The impedance of the 5th transmission line 50 is equal to equal to the impedance of the 7th transmission line 70, the impedance of the 6th transmission line 60
The impedance of the 8th transmission line 80, makes the output of the second difference port B and the defeated of the 3rd difference port C
Go out the half that power is the input power of the first difference port A.In specific implementation process, the 5th transmission
Line and the 7th transmission line impedance is identical (is set as Z2), the 6th transmission line and the 8th transmission line impedance is identical (sets
It is set to Z3)；According to above Controlling principle, can be according to the pre-set bandwidths of design, dead-center position and power
Output ratio, obtains concrete Ze1、Zo1、Ze2、Zo2、Ze3、Zo3、Ze4、Zo4、Z2、Z3Value, and
The balanced type branch coupler material object meeting index request is designed based on these occurrences.
Refer to Fig. 4, for a kind of coupling corresponding with the filtering branch coupler structure of monolayer balanced type shown in Fig. 3
Clutch hardware domain.In conjunction with Fig. 3 and Fig. 4, one end of the line segment 11 of the first transmission line 10 is respectively with first
Single port 1 and the 8th transmission line 80 connect, the line segment 12 of the first transmission line 10 away from the one of line segment 11
End be connected with the second single port 2 and the 5th transmission line 50 respectively, line segment 13 respectively with line segment 11 and line segment
12 parallel interval are arranged；One end of the line segment 21 of the second transmission line 20 respectively with the 3rd single port 3 and the 5th
Transmission line 50 connects, and one end away from line segment 21 of the line segment 22 of the second transmission line 20 is single with the 4th respectively
Port 4 and the 6th transmission line 60 connect, and line segment 23 is arranged with line segment 21 and line segment 22 parallel interval respectively；
One end of the line segment 31 of the 3rd transmission line 30 is connected with the 5th single port 5 and the 6th transmission line 60 respectively,
One end away from line segment 31 of the line segment 32 of the 3rd transmission line 30 passes with the 6th single port 6 and the 7th respectively
Defeated line 70 connects, and line segment 33 is arranged with line segment 31 and line segment 32 parallel interval respectively；4th transmission line 40
One end of line segment 41 be connected with the 7th single port 7 and the 7th transmission line 70 respectively, the 4th transmission line 40
One end away from line segment 41 of line segment 42 be connected with the 8th single port 8 and the 8th transmission line 80 respectively,
Line segment 43 is arranged with line segment 41 and line segment 42 parallel interval respectively.
Wherein, the length of line segment 13 passes through L1Represent, between line segment 11 (or line segment 12) and line segment 13
Away from passing through S1Representing, line segment (11,12,13) width is equal and all passes through W1Represent；Line segment 23
Length passes through L2Representing, line segment 21 (or line segment 22) passes through S with the spacing of line segment 232Represent, line segment
(21,22,23) width is equal and all passes through W2Represent；The length of line segment 33 passes through L3Represent, line
Section 31 (or line segments 32) pass through S with the spacing of line segment 333Represent, line segment (31,32,33) width phase
Deng and all pass through W3Represent；The length of line segment 43 passes through L4Represent, line segment 41 (or line segment 42) and line
The spacing of section 43 passes through S4Representing, line segment (41,42,43) width is equal and all passes through W4Represent；
It addition, the 5th transmission line 50 and the 7th transmission line 70 is equivalently-sized, length is determined by its electrical length
And pass through L5Representing, width passes through W5Represent；6th transmission line 60 and the size phase of the 8th transmission line 80
With, length is determined by its electrical length and passes through L6Representing, width passes through W6Represent；Line segment 11 and line segment
Between 12, the width in gap 14 passes through L7Representing, between line segment 21 and line segment 22, the width in gap 24 leads to
Cross L8Representing, between line segment 31 and line segment 32, the width in gap 34 passes through L9Represent, line segment 41 and line
Between section 42, the width in gap 44 passes through L10Represent.
Below in conjunction with the coupler structure figure shown in Fig. 4, provide the internal structure parameter of described bonder, with
Mid frequency 1.71GHz realizes the balanced type filtering branch line coupling with filter function described above
Clutch.Its concrete structure parameter is: L1=52mm, L2=51mm, L3=55.4mm, L4=50.8
Mm, L5=24.7mm, L6=24.8mm, L7=0.4mm, L8=0.4mm, L9=0.4mm,
L10=0.6mm, W1=1.8mm, W2=2.9mm, W3=0.2mm, W4=2.5mm, W5=6.74
Mm, W6=4.2mm, S1=0.5mm, S2=0.5mm, S3=0.7mm, S4=1.94mm.
According to above-mentioned a series of design parameters, emulator is used to emulate to obtain to designed bonder
Obtaining simulation result, simulation result is as shown in Figure 5-Figure 7.Curve in Fig. 5-Fig. 7 is according to the S parameter of signal
Drawing, S parameter i.e. scattering parameter, is an important parameter in microwave transmission.Fig. 5 is above-mentioned concrete chi
The differential-mode response figure of very little bonder, SddRepresent the S parameter of the differential signal of the design bonder, when its work
Mid frequency when 1.71GHz, it is achieved that the distribution of the constant power of difference mode signal, insertion loss is 1dB,
Differential mode return loss is less than 10dB in 1.68GHz to 1.73GHz.Fig. 6 is the coupling of above-mentioned concrete size
The phase contrast response diagram of device, in passband, poor (the ∠ S of B, C port phaseddCA-∠SddBA) be (90 ±
10s)°.Fig. 7 is the common-mode response figure of above-mentioned concrete size couplers, SccRepresent the design bonder
The S parameter of common-mode signal, in passband, common-mode signal suppresses all at more than 20dB.
Sum it up, in embodiments of the present invention, tie by building monolayer balanced type filtering branch line bonder
Structure, and merge balanced type filter structure thereon, it is achieved differential signal is carried out at power distribution, filtering
While reason and common-mode signal suppression, simplify the structure of bonder, reduction processing cost and this design and have many
The technique effect that transmission zero, frequency selectivity are good.Efficiently solve balanced type branch line filter couplers
, cost height, frequency selectivity complicated for double layer design and structure have technical problem to be hoisted.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know base
This creativeness concept, then can make other change and amendment to these embodiments.So, appended right is wanted
Ask and be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a balanced type filtering branch line bonder, it is characterised in that including:
The most spaced first single port (1), the second single port (2), the 3rd single port (3),
Four single port (4), the 5th single port (5), the 6th single port (6), the 7th single port (7) and the 8th
Single port (8)；
Described first single port (1) is connected by the first transmission line (10) with described second single port (2),
Described 3rd single port (3) is connected by the second transmission line (20) with described 4th single port (4), institute
State the 5th single port (5) to be connected by the 3rd transmission line (30) with described 6th single port (6), described
7th single port (7) is connected by the 4th transmission line (40) with described 8th single port (8)；Wherein,
Described first is half-wavelength coupled transmission line, and electricity to described 4th transmission line (10,20,30,40)
Length is the first electrical length；
Described first single port (1) and described second single port (2) constitute the first difference port (A), institute
State the 3rd single port (3) and described 4th single port (4) constitutes the second difference port (B), the described 5th
Single port (5) and described 6th single port (6) constitute the 3rd difference port (C), described 7th single port
(7) and described 8th single port (8) constitute the 4th difference port (D)；
By the 5th transmission line between described first difference port (A) and described second difference port (B)
(50) connect, between described second difference port (B) and described 3rd difference port (C), pass through the
Six transmission lines (60) connect, described 3rd difference port (C) and described 4th difference port (D) it
Between connected by the 7th transmission line (70), described 4th difference port (D) and described first difference port
(A) connected by the 8th transmission line (80) between；Wherein, the described 5th to described 8th transmission line (50,
60,70,80) it is quarter-wave non-coupled transmission line, described 5th transmission line (50) and institute
State the electrical length of the 7th transmission line (70) and be the second electrical length, described 6th transmission line (60) and described
The electrical length of the 8th transmission line (80) is the 3rd electrical length.
2. balanced type filtering branch line bonder as claimed in claim 1, it is characterised in that described the
In one to the 8th single port (1～8), the impedance of either port is 50 ohm, and described first electrical length is specially
180 °, described second electrical length is specially 90 °, and described 3rd electrical length is specially 90 °.
3. balanced type filtering branch line bonder as claimed in claim 1, it is characterised in that Ren Yisuo
State half-wavelength coupled transmission line to include: the first line segment (a), the second line segment (b) and the 3rd line segment (c)；
Described first line segment (a) and described second line segment (b) are arranged in same aspect, and described first line segment
It is provided with a gap (d) between (a) and described second line segment (b)；Described 3rd line segment (c) is arranged
In another aspect；Described first line segment (a) and described second line segment (b) position and described the is set
Three line segments (c) to arrange position relative.
4. balanced type filtering branch line bonder as claimed in claim 3, it is characterised in that described the
A length of first length of one line segment (a), a length of second length of described second line segment (b), described
A length of 3rd length of the 3rd line segment (c)；Described first length, the width of described gap (d) and institute
The summation stating the second length three is equal with described 3rd length.
5. balanced type filtering branch line bonder as claimed in claim 1, it is characterised in that described the
One difference port (A) is connected with the signal input port of described bonder, described second difference port (B),
Described 3rd difference port (C) and described 4th difference port (D) are all defeated with the signal of described bonder
Go out port to be connected；Wherein, described 4th difference port (D) is as isolated port.
6. balanced type filtering branch line bonder as claimed in claim 1, it is characterised in that by with
Described first difference port (A) is as the signal input port of described bonder, described second difference port
(B) as the signal output port of described bonder, the first transmission channel for transmitting signal is formed；
By the signal input port using described first difference port (A) as described bonder, described 3rd poor
Divide port (C) as the signal output port of described bonder, form the second transmission for transmitting signal
Channel；
Described first transmission channel and described second transmission channel are respectively provided with four transmission zeros；By regulation
The odd, even mould impedance of described first transmission line (10), control to adjust described first transmission channel bandwidth,
The bandwidth of described second transmission channel, the position and described of fractional transmission zero point of described first transmission channel
The position of the fractional transmission zero point of two transmission channels.
7. balanced type filtering branch line bonder as claimed in claim 6, it is characterised in that by adjusting
Save the odd, even mould impedance of described second transmission line (20), control to adjust the band of described first transmission channel
The position of the fractional transmission zero point of wide and described first transmission channel.
8. balanced type filtering branch line bonder as claimed in claim 6, it is characterised in that by adjusting
Save the odd, even mould impedance of described 3rd transmission line (30), control to adjust the portion of described second transmission channel
Divide the position of transmission zero.
9. balanced type filtering branch line bonder as claimed in claim 6, it is characterised in that by adjusting
Save the odd, even mould impedance of described 4th transmission line (40), control to adjust the band of described second transmission channel
The isolation of wide and described 4th difference port (D).
10. balanced type filtering branch line bonder as claimed in claim 1, it is characterised in that by adjusting
Save the described 5th to the impedance of at least one transmission line in described 8th transmission line (50,60,70,80), come
Control the power output ratio of the signal output port of described bonder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610343673.6A CN106025471A (en) | 2016-05-23 | 2016-05-23 | Balanced filter branch line coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610343673.6A CN106025471A (en) | 2016-05-23 | 2016-05-23 | Balanced filter branch line coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106025471A true CN106025471A (en) | 2016-10-12 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610343673.6A Pending CN106025471A (en) | 2016-05-23 | 2016-05-23 | Balanced filter branch line coupler |
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| CN (1) | CN106025471A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111613857A (en) * | 2020-05-25 | 2020-09-01 | 南京师范大学 | Novel dual-passband filtering coupler adopting double-layer slotted circular patch |
| CN116111970A (en) * | 2023-03-28 | 2023-05-12 | 南通大学 | Eight-port 3dB coupler based on lumped elements |
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| CN104953225A (en) * | 2015-05-29 | 2015-09-30 | 南通大学 | Balance-type branch line coupler with filter function |
| CN105244589A (en) * | 2015-10-19 | 2016-01-13 | 南通大学 | Branch line coupler and manufacture method thereof |
| CN105591182A (en) * | 2016-02-25 | 2016-05-18 | 南通大学 | Balance type-single ended filter anti-phase power divider |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111613857A (en) * | 2020-05-25 | 2020-09-01 | 南京师范大学 | Novel dual-passband filtering coupler adopting double-layer slotted circular patch |
| CN111613857B (en) * | 2020-05-25 | 2022-02-01 | 南京师范大学 | Double-passband filtering coupler adopting double-layer slotted circular patch |
| CN116111970A (en) * | 2023-03-28 | 2023-05-12 | 南通大学 | Eight-port 3dB coupler based on lumped elements |
| CN116111970B (en) * | 2023-03-28 | 2023-08-04 | 南通大学 | Eight-port 3dB coupler based on lumped elements |
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