CN104143672B - A kind of two-frequency duplex device using racemosus nodel line to load matching network - Google Patents
A kind of two-frequency duplex device using racemosus nodel line to load matching network Download PDFInfo
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- CN104143672B CN104143672B CN201410348690.XA CN201410348690A CN104143672B CN 104143672 B CN104143672 B CN 104143672B CN 201410348690 A CN201410348690 A CN 201410348690A CN 104143672 B CN104143672 B CN 104143672B
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Abstract
The invention discloses a kind of two-frequency duplex device using racemosus nodel line to load matching network, microstrip line construction is used to realize, it is produced in the manner of a printed circuit board on double-sided copper-clad micro-strip plate, loading matching network including signal incoming feeder port port1, signal output feeder port port2 and port3, four path filters and racemosus nodel line, this matching network is made up of two short-circuited transmission lines and two open circuited transmission lines.Using racemosus nodel line to load the two-frequency duplex device of matching network, it is possible to when arbitrary group of resonator works, another group resonator is in open-circuit condition, improves the inhibition between passage；This matching network volume is little simultaneously, and design is simple, can be designed according to Design Theory formula, changes length value and the resistance value of transmission line, and the scope of application is the most more flexible.
Description
Technical field
The present invention relates to the technical field of FDD, use racemosus nodel line particularly to one
Load the two-frequency duplex device of matching network.
Background technology
Due to wireless communication technology develop rapidly and radio communication is needed day by day to increase, now by people
Market 2G, 3G, 4G network is also deposited, many wireless terminals, such as mobile phone, panel computer etc.,
Being intended to energy compatible multiple communication standards during design, this just can allow terminal use enjoy different operators simultaneously
The service provided.
FDD technology common in communication industry, it is desirable to there are two communication ports a: data feedback channel and one
Individual down going channel.Now, communication system is necessary for use duplexer.Traditional duplexer is only capable of working in
One group of up-downgoing frequency, the market coexisted for multiple communication standard, such duplexer can not meet requirement.
Two-frequency duplex device, i.e. four-way duplexer, can simultaneously work in two groups of up-downgoing frequencies, significantly drop
The volume of low communication system and cost.There is now multiple scholar and propose different four-way diplexer structures.Double
The design of multiplexer essentially consists in matching network.The core innovation of the present invention is that proposing one is applicable to four
The novel racemosus nodel line of double-channel duplex device loads matching network structure.The duplexer of many passbands requires multiple passbands
Between have preferable isolation effect, require that device size is the least simultaneously.
The high isolation microstrip duplexer of a kind of branched structure that data shows, the structure chart of this duplexer such as figure
Shown in 1, specifically refer to " number of patent application: 201310547087.X, patent name: branched structure
High isolation microstrip duplexer, patentee: the China Measures Institute ".Its matching network such as Fig. 1 used
In shown in 5 and 11, this matching network only uses two simple uniform transmission lines, therefore, is only capable of meeting
The requirement to isolation of the two passage duplexers, is but difficult to meet the insulated degree requirement of the duplexer of four-way.
The another kind that data shows micro-strip duplexer based on electromagnetism hybrid coupled, the structure chart of this duplexer is such as
Shown in Fig. 2, specifically refer to " number of patent application: 201310582773.0, patent name: a kind of based on
The micro-strip duplexer of electromagnetism hybrid coupled, patentee: South China Science & Engineering University ".Its matching network used
For T connector, as shown in Fig. 28.Although in the technical scheme of this patent use T connector as
Distribution network, is only capable of meeting the insulated degree requirement of double-channel duplex device equally, is but difficult to meet the duplex of four-way
The insulated degree requirement of device.
The duplexer of another four passband that data shows, the structure chart of this duplexer is as it is shown on figure 3, concrete
Refer to Hung-Wei Wu, Shih-Hua Huang and Yu-Fu Chen at the top periodical of the art "
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS " on deliver entitled " Design of
New Quad-Channel Diplexer With Compact Circuit Size " article.This duplex
Device is by two groups of resonators (being the most 2. a group, be the most 4. a group) and a matching network composition, matching network
Use T connector, such as the L in Fig. 33、L4Shown in.Such matching network, wherein one group humorous
During the device that shakes work, it is impossible to ensure that another group resonator is in open-circuit condition, therefore, it is difficult to it is equal to realize four passages
Obtain preferable isolation effect.
Summary of the invention
It is an object of the invention to the shortcoming overcoming prior art with not enough, it is provided that a kind of use racemosus nodel line adds
Carry the two-frequency duplex device of matching network, the duplexer of the present invention discloses the novel of a kind of racemosus nodel line loading
Matching network, can meet two passages, the insulated degree requirement of four-way duplexer, fills up prior art about double
The blank of diplexer matching system design frequently.
The purpose of the present invention is achieved through the following technical solutions:
A kind of two-frequency duplex device using racemosus nodel line to load matching network, makes in the manner of a printed circuit board
On two-sided shoe copper micro-strip plate, the same face of described double-sided copper-clad micro-strip plate makes respectively and has signal input feedback
Line cap port1, signal output feeder port port2, signal output feeder port port3, first passage
Wave filter, second channel wave filter, third channel wave filter, fourth lane wave filter the first short-circuited transmission line,
Second short-circuited transmission line, the first open circuited transmission line, the second open circuited transmission line, the first output feeder, second defeated
Going out feeder line, the 3rd output feeder, the 4th output feeder, the another side of this double-sided copper-clad micro-strip plate connects for covering copper
Floor；The bottom of the first output feeder is vertical with the bottom of signal output feeder port port2 to be connected in reversely
L-type, the second output feeder is connected with the lower horizontal of signal output feeder port port2, simultaneously with first
The bottom of output feeder vertically connects, and the first output feeder and the second output feeder constitute an output feedback
Gauze network；The bottom of the 3rd output feeder is vertical with the bottom of signal output feeder port port3 to be connected in L
Type, the 4th output feeder is connected with the lower horizontal of signal output feeder port port3, the most defeated with the 3rd
The bottom going out feeder line vertically connects, and the 3rd output feeder and the 4th output feeder constitute an output feeder
Network；First short-circuited transmission line and the second short-circuited transmission line bottom connect and compose U-shaped, are positioned at the first output
Between feeder line and the 3rd output feeder, the centre, lower end of this U-shaped is vertical with feeder line port port1 to be connected,
First open circuited transmission line is vertical with the first short-circuited transmission line to be connected in reverse L-type, the second open circuited transmission line and
Two short-circuited transmission lines vertically connect L-shaped, and the second output feeder, the first open circuited transmission line, second open
Road transmission line, the 4th output feeder simultaneously horizontally set and be positioned on same level line, the second output feeder with
One end of first open circuited transmission line is adjacent exists coupling gap, the second open circuited transmission line and the 4th output feeder
One end is adjacent exists coupling gap；Described first passage wave filter, second channel wave filter are positioned at the first output
Between feeder line and the first short-circuited transmission line, wherein first passage wave filter is positioned at the second output feeder and first and opens
The surface of road transmission line, second channel wave filter is just being positioned at the second output feeder and the first open circuited transmission line
Lower section；Described third channel wave filter, fourth lane wave filter are positioned at the 3rd output feeder and the second short circuit passes
Between defeated line, wherein third channel wave filter is positioned at just going up of the second open circuited transmission line and the 4th output feeder
Side, fourth lane wave filter is positioned at the second open circuited transmission line and the underface of the 4th output feeder.
Preferably, on the same face of described double-sided copper-clad micro-strip plate also make have the 5th ground short circuit via and
6th ground short circuit via；Described first passage wave filter by the first micro-strip, the second micro-strip, the 3rd micro-strip,
4th micro-strip, the 5th micro-strip, the 6th micro-strip, the 7th micro-strip, the 8th micro-strip composition, wherein the first micro-strip,
3rd micro-strip, the 6th micro-strip, the 8th micro-strip are transverse horizontal, are parallel to the second output feeder and first and open
Road transmission line, the second micro-strip, the 4th micro-strip, the 5th micro-strip, the 7th micro-strip are longitudinal, are parallel to first
Output feeder and the first short-circuited transmission line, the two ends of the 3rd horizontal micro-strip and the second longitudinal micro-strip, the 4th
The top of micro-strip connects and composes inverted u-shaped, the two ends of the 6th horizontal micro-strip and the 5th longitudinal micro-strip, the
The top of seven micro-strip connects and composes inverted u-shaped, there is coupling gap between the 4th micro-strip and the 5th micro-strip, and
And the 4th the bottom of micro-strip and the 5th micro-strip connected by the 5th ground short circuit via, wherein the 5th ground short circuit
The surface of via coupling gap between the second output feeder and the first open circuited transmission line, the first micro-strip
Vertical with the bottom of the second micro-strip connecting and composing reverse L-type, the 8th micro-strip is vertical with the bottom of the 7th micro-strip to be connected
Connect composition L-type；
Described third channel wave filter by the 9th micro-strip, the tenth micro-strip, the 11st micro-strip, the 12nd micro-strip,
13rd micro-strip, the 14th micro-strip, the 15th micro-strip, the 16th micro-strip composition, wherein the 9th micro-strip, the
11 micro-strip, the 14th micro-strip, the 16th micro-strip are transverse horizontal, be parallel to the second open circuited transmission line and
4th output feeder, the tenth micro-strip, the 12nd micro-strip, the 13rd micro-strip, the 15th micro-strip are longitudinal,
It is parallel to the 3rd output feeder and the second short-circuited transmission line, the two ends of the 11st horizontal micro-strip and longitudinal the
Ten micro-strip, the top of the 12nd micro-strip connect and compose inverted u-shaped, and the two ends of the 14th horizontal micro-strip are with vertical
To the 13rd micro-strip, the top of the 15th micro-strip connect and compose inverted u-shaped, the 12nd micro-strip and the 13rd
There is coupling gap between micro-strip, and the bottom of the 12nd micro-strip and the 13rd micro-strip is short by the 6th ground connection
Passing by hole to connect, wherein the 6th ground short circuit via is between the second open circuited transmission line and the 4th output feeder
The surface of coupling gap, the 9th micro-strip is vertical with the bottom of the tenth micro-strip connects and composes reverse L-type,
16 micro-strip are vertical with the bottom of the 15th micro-strip connects and composes L-type.
Preferably, described second channel wave filter by the 17th micro-strip, the 18th micro-strip, the 19th micro-strip,
20th micro-strip, the 21st micro-strip, the 22nd micro-strip composition, wherein the 17th micro-strip, the 19th micro-
Band, the 20th micro-strip, the 22nd micro-strip are transverse horizontal, are parallel to the second open circuited transmission line and the 4th
Output feeder, the 24th micro-strip, the 27th micro-strip are longitudinal, are parallel to the first output feeder and
One short-circuited transmission line, the two ends of the 18th longitudinal micro-strip and 17 horizontal micro-strip, the end of the 19th micro-strip
End connects and composes the U-shaped of overturning shape to the left, and the two ends of the 21st longitudinal micro-strip are micro-with horizontal 20
Band, the bottom of the 22nd micro-strip connect and compose the U-shaped of overturning shape to the right, above-mentioned two U-shaped back to
Arrange, between the 18th micro-strip and the 21st micro-strip, there is coupling gap, be positioned at the second output feeder and the
The underface of the coupling gap between one open circuited transmission line.
Described fourth lane wave filter by the 23rd micro-strip, the 24th micro-strip, the 25th micro-strip,
26 micro-strip, the 27th micro-strip, the 28th micro-strip composition, wherein the 23rd micro-strip, the 20th
Five micro-strip, the 26th micro-strip, the 28th micro-strip are transverse horizontal, be parallel to the second output feeder and
First open circuited transmission line, the 18th micro-strip, the 21st micro-strip are longitudinal, are parallel to the 3rd output feeder
With the second short-circuited transmission line, the two ends of the 24th longitudinal micro-strip and 23 horizontal micro-strip, the 20th
The bottom of five micro-strip connects and composes the U-shaped of overturning shape to the left, and the two ends of the 27th longitudinal micro-strip are with horizontal
To 26 micro-strip, the bottom of the 28th micro-strip connect and compose the U-shaped of overturning shape to the right, above-mentioned two
Back to setting, there is coupling gap between the 24th micro-strip and the 27th micro-strip in individual U-shaped, is positioned at
Coupling gap between two open circuited transmission lines and the 4th output feeder underface.
Preferably, described first short-circuited transmission line, the second short-circuited transmission line, the first open circuited transmission line and second
Open circuited transmission line collectively forms racemosus nodel line and loads matching network, and the microwave that above-mentioned four transmission lines use
Transmission structure includes microstrip line, strip line, coaxial line and the line of rabbet joint.
Preferably, (the Y of described first short-circuited transmission line1, θ1), (Y of the first open circuited transmission line2, θ2)、
(the Y of the second short-circuited transmission line3, θ3) and (Y of the second open circuited transmission line4, θ4) by equation group
-jY1cot(r3θ1)+jY2tan(r3θ2)=0
-jY1cot(r4θ1)+jY2tan(r4θ2)=0
-jY3cot(θ3)+jY4tan(θ4)=0
-jY3cot(r2θ3)+jY4tan(r2θ4)=0
Determine, f in equation group1, f2, f3, f4Respectively represent first passage wave filter, second channel wave filter,
Third channel wave filter, the passband central frequency of fourth lane wave filter, make r2=f2/f1,r3=f3/f1,
r4=f4/f1, above-mentioned Y1、θ1It is respectively Characteristic mobility and electrical length, the Y of the first short-circuited transmission line2、θ2
It is respectively Characteristic mobility and electrical length, the Y of the first open circuited transmission line3、θ3It is respectively the second short-circuited transmission line
Characteristic mobility and electrical length, Y4、θ4It is respectively Characteristic mobility and the electrical length of transmission line 4.
Preferably, the same face of described double-sided copper-clad micro-strip plate also makes have the first ground short circuit via, the
Two ground short circuit vias, the 3rd ground short circuit via, the 4th ground short circuit via, wherein the first ground short circuit
Via and the first output feeder top connect, and the second ground short circuit via and the first short-circuited transmission line top are even
Connecing, the 3rd ground short circuit via and the second short-circuited transmission line top connect, the 4th ground short circuit via and the 3rd
Output feeder top connects.
The present invention has such advantages as relative to prior art and effect:
1, the two-frequency duplex device of the matching network that the racemosus nodel line that the present invention uses loads, it is possible at arbitrary group
During resonator works, another group resonator is in open-circuit condition, improves the inhibition between passage.
2, the matching network volume that the present invention proposes is little, uses the size of duplexer of this matching network almost
Being only dependent upon filter size, matching network increase only a small amount of volume.
3. the matching network design process that the present invention proposes is simple, and design is unrelated with filter construction, all
Can be designed according to the Design Theory formula proposed, therefore this matching network is applied widely.
Accompanying drawing explanation
Fig. 1 is the structural representation of the high isolation microstrip duplexer of a kind of branched structure in prior art；
Fig. 2 is the structural representation of a kind of micro-strip duplexer based on electromagnetism hybrid coupled in prior art；
Fig. 3 is the structural representation of the duplexer of a kind of four passbands in prior art；
Fig. 4 is the structure chart that the racemosus nodel line in the duplexer design that the present invention proposes loads matching network；
Fig. 5 is the structural representation of a kind of two-frequency duplex device design that the present invention proposes；
Fig. 6 is the simulation result schematic diagram of a kind of two-frequency duplex device design that the present invention proposes；
In figure, reference is: 1-the first short-circuited transmission line, 2-the first open circuited transmission line, 3-the second short circuit
Transmission line, 4-the second open circuited transmission line, 5-first passage wave filter, 5-1-the first micro-strip, 5-2-second is micro-
Band, 5-3-the 3rd micro-strip, 5-4-the 4th micro-strip, 5-5-the 5th micro-strip, 5-6-the 6th micro-strip, 5-7-the 7th
Micro-strip, 5-8-the 8th micro-strip, 6-second channel wave filter, 6-1-the 17th micro-strip, 6-2-the 18th micro-strip,
6-3-the 19th micro-strip, 6-4-the 20th micro-strip, 6-5-the 21st micro-strip, 6-6-the 22nd micro-strip,
7-third channel wave filter, 7-1-the 9th micro-strip, 7-2-the tenth micro-strip, 7-3-the 11st micro-strip, 7-4-
12 micro-strip, 7-5-the 13rd micro-strip, 7-6-the 14th micro-strip, 7-7-the 15th micro-strip, 7-8-the 16th
Micro-strip, 8-fourth lane wave filter, 8-1-the 23rd micro-strip, 8-2-the 24th micro-strip, 8-3-second
15 micro-strip, 8-4-the 26th micro-strip, 8-5-the 27th micro-strip, 8-6-the 28th micro-strip, 9-
One output feeder, 10-the second output feeder, 11-the 3rd output feeder, 12-the 4th output feeder, 13-
One ground short circuit via, 14-the second ground short circuit via, 15-the 3rd ground short circuit via, 16-the 4th ground connection
Short circuit via, 17-the 5th ground short circuit via, 18-the 6th ground short circuit via, 19-signal incoming feeder end
Mouth port1,20-signal output feeder port port2,21-signal output feeder port port3.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but the embodiment party of the present invention
Formula is not limited to this.
Embodiment
The structure chart of a kind of two-frequency duplex device using racemosus nodel line to load matching network that the present invention proposes is such as
Shown in Fig. 5, it is produced in the manner of a printed circuit board on two-sided shoe copper micro-strip plate, described double-sided copper-clad micro-strip
On the same face of plate respectively make have signal incoming feeder port port1, signal output feeder port port2,
Signal output feeder port port3 (respectively corresponding diagram in labelling 19,20,21), first passage wave filter 5,
Second channel wave filter 6, third channel wave filter 7, fourth lane wave filter the 8, first short-circuited transmission line 1,
Second short-circuited transmission line the 3, first open circuited transmission line the 2, second open circuited transmission line the 4, first output feeder 9,
Second output feeder the 10, the 3rd output feeder the 11, the 4th output feeder 12, this double-sided copper-clad micro-strip plate
Another side is for covering copper earth plate.
The bottom of the first output feeder 9 is vertical with the bottom of signal output feeder port port2 to be connected in reversely
L-type, the second output feeder 10 is connected with the lower horizontal of signal output feeder port port2, simultaneously with the
The bottom of one output feeder 9 vertically connects, and the first output feeder 9 is constituted with the second output feeder 10
One output feeder network；
The bottom of the 3rd output feeder 11 is vertical with the bottom of signal output feeder port port3 to be connected in L
Type, the 4th output feeder 12 is connected with the lower horizontal of signal output feeder port port3, simultaneously with the
The bottom of three output feeders 11 vertically connects, and the 3rd output feeder 11 and the 4th output feeder 12 structure
Become an output feeder network；
First short-circuited transmission line 1 and the second short-circuited transmission line 3 bottom connect and compose U-shaped, are positioned at first defeated
Go out between feeder line 9 and the 3rd output feeder 11, hang down with feeder line port port1 in the middle of the lower end of this U-shaped
Direct-connected connecing, the first open circuited transmission line 2 is vertical with the first short-circuited transmission line 1 to be connected in reverse L-type, and second opens
Road transmission line 4 is vertical with the second short-circuited transmission line 3 be connected L-shaped, and the second output feeder 10, first
Open circuited transmission line the 2, second open circuited transmission line the 4, the 4th output feeder 12 simultaneously horizontally set and be positioned at same
On horizontal line, the second output feeder 10 is adjacent with one end of the first open circuited transmission line 2 exists coupling gap,
Second open circuited transmission line 4 is adjacent with one end of the 4th output feeder 12 exists coupling gap；
It is short with first that described first passage wave filter 5, second channel wave filter 6 are positioned at the first output feeder 9
Between road transmission line 1, wherein first passage wave filter 5 is positioned at the second output feeder 10 and the first open circuit passes
The surface of defeated line 2, second channel wave filter 6 is positioned at the second output feeder 10 and the first open circuited transmission line 2
Underface；Described third channel wave filter 7, fourth lane wave filter 8 are positioned at the 3rd output feeder 11
And between the second short-circuited transmission line 3, wherein third channel wave filter 7 is positioned at the second open circuited transmission line 4 and
The surface of four output feeders 12, it is defeated with the 4th that fourth lane wave filter 8 is positioned at the second open circuited transmission line 4
Go out the underface of feeder line 12.
Also make on the same face of described double-sided copper-clad micro-strip plate and have the 5th ground short circuit via (17) and the
Six ground short circuit vias 18；
Described first passage wave filter 5 by the first micro-strip 5-1, the second micro-strip 5-2, the 3rd micro-strip 5-3,
Four micro-strip 5-4, the 5th micro-strip 5-5, the 6th micro-strip 5-6, the 7th micro-strip 5-7, the 8th micro-strip 5-8 composition,
Wherein the first micro-strip, the 3rd micro-strip, the 6th micro-strip, the 8th micro-strip are transverse horizontal, are parallel to second defeated
Going out feeder line 10 and the first open circuited transmission line 2, the second micro-strip, the 4th micro-strip, the 5th micro-strip, the 7th micro-strip are
Longitudinal, it is parallel to the first output feeder 9 and the first short-circuited transmission line 1, the two ends of the 3rd horizontal micro-strip
Inverted u-shaped, the two of the 6th horizontal micro-strip are connected and composed with the second longitudinal micro-strip, the top of the 4th micro-strip
End connects and composes inverted u-shaped with the 5th longitudinal micro-strip, the top of the 7th micro-strip, the 4th micro-strip and the 5th micro-
There is coupling gap between band, and the bottom of the 4th micro-strip and the 5th micro-strip is by the 5th ground short circuit via
Connecting, wherein the 5th ground short circuit via is between the second output feeder 10 and the first open circuited transmission line 2
The surface of coupling gap, the first micro-strip is vertical with the bottom of the second micro-strip connects and composes reverse L-type,
Eight micro-strip are vertical with the bottom of the 7th micro-strip connects and composes L-type；
Described third channel wave filter 7 by the 9th micro-strip 7-1, the tenth micro-strip 7-2, the 11st micro-strip 7-3,
12nd micro-strip 7-4, the 13rd micro-strip 7-5, the 14th micro-strip 7-6, the 15th micro-strip 7-7, the 16th
Micro-strip 7-8 forms, and wherein the 9th micro-strip, the 11st micro-strip, the 14th micro-strip, the 16th micro-strip are horizontal
Level, be parallel to the second open circuited transmission line 4 and the 4th output feeder 12, the tenth micro-strip, the 12nd micro-strip,
13rd micro-strip, the 15th micro-strip are longitudinal, are parallel to the 3rd output feeder 11 and the second short circuit transmission
Line 3, the two ends of the 11st horizontal micro-strip are connected structure with the tenth longitudinal micro-strip, the top of the 12nd micro-strip
Become inverted u-shaped, the two ends of the 14th horizontal micro-strip and the 13rd longitudinal micro-strip, the top of the 15th micro-strip
End connects and composes inverted u-shaped, there is coupling gap, and the tenth between the 12nd micro-strip and the 13rd micro-strip
The bottom of two micro-strip and the 13rd micro-strip is connected by the 6th ground short circuit via, wherein the 6th ground short circuit mistake
The surface of hole coupling gap between the second open circuited transmission line 4 and the 4th output feeder 12, the 9th
Micro-strip is vertical with the bottom of the tenth micro-strip connects and composes reverse L-type, the 16th micro-strip and the end of the 15th micro-strip
End vertically connects and composes L-type.
Described second channel wave filter 6 is by the 17th micro-strip 6-1, the 18th micro-strip 6-2, the 19th micro-strip
6-3, the 20th micro-strip 6-4, the 21st micro-strip 6-5, the 22nd micro-strip 6-6 composition, wherein the tenth
Seven micro-strip, the 19th micro-strip, the 20th micro-strip, the 22nd micro-strip are transverse horizontal, are parallel to second
Open circuited transmission line 4 and the 4th output feeder 12, the 24th micro-strip, the 27th micro-strip are longitudinal, flat
Row is in the first output feeder 9 and the first short-circuited transmission line 1, and the two ends of the 18th longitudinal micro-strip are with horizontal
17 micro-strip, the bottom of the 19th micro-strip connect and compose the U-shaped of overturning shape to the left, longitudinal the 21st
The two ends of micro-strip and 20 horizontal micro-strip, the bottom of the 22nd micro-strip connect and compose the U of overturning shape to the right
Font, above-mentioned two U-shaped, back to setting, exists between the 18th micro-strip and the 21st micro-strip between coupling
Gap, the underface of the coupling gap between the second output feeder 10 and the first open circuited transmission line 2.
Described fourth lane wave filter 8 by the 23rd micro-strip 8-1, the 24th micro-strip 8-2, the 20th
Five micro-strip 8-3, the 26th micro-strip 8-4, the 27th micro-strip 8-5, the 28th micro-strip 8-6 composition,
Wherein the 23rd micro-strip, the 25th micro-strip, the 26th micro-strip, the 28th micro-strip are transverse horizontal
, it is parallel to the second output feeder 10 and the first open circuited transmission line the 2, the 18th micro-strip, the 21st micro-strip
It is longitudinal, is parallel to the 3rd output feeder 11 and the second short-circuited transmission line 3, the 24th longitudinal micro-strip
Two ends and 23 horizontal micro-strip, the bottom of the 25th micro-strip connect and compose the U-shaped of overturning shape to the left
Type, the two ends of the 27th longitudinal micro-strip connect with the bottom of 26 horizontal micro-strip, the 28th micro-strip
Connect the U-shaped constituting overturning shape to the right, above-mentioned two U-shaped back to setting, the 24th micro-strip and second
Coupling gap is there is, between the second open circuited transmission line 4 and the 4th output feeder 12 between 17 micro-strip
Coupling gap underface.
Also make on the same face of described double-sided copper-clad micro-strip plate and have first ground short circuit via the 13, second ground connection
Short circuit via the 14, the 3rd ground short circuit via the 15, the 4th ground short circuit via 16, wherein the first ground connection is short
Passing by hole to be connected with the first output feeder top, the second ground short circuit via and the first short-circuited transmission line top are even
Connecing, the 3rd ground short circuit via and the second short-circuited transmission line top connect, the 4th ground short circuit via and the 3rd
Output feeder top connects.
Described first short-circuited transmission line the 1, second short-circuited transmission line the 3, first open circuited transmission line 2 and second is opened
Road transmission line 4 collectively forms racemosus nodel line and loads matching network, and the microwave that above-mentioned four transmission lines use
Transmission structure includes microstrip line, strip line, coaxial line and the line of rabbet joint.In the duplexer design that the present invention proposes
Racemosus nodel line load matching network structure chart as shown in Figure 4.
The method for designing of this matching network is specific as follows:
Make f1, f2, f3, f4Represent first passage wave filter, second channel wave filter, third channel respectively
Wave filter, the passband central frequency of fourth lane wave filter, make r2=f2/f1,r3=f3/f1,r4=f4/
f1, (the Y of described first short-circuited transmission line1, θ1), (Y of the first open circuited transmission line2, θ2), second
(the Y of short-circuited transmission line3, θ3) and (Y of the second open circuited transmission line4, θ4) by equation group
-jY1cot(r3θ1)+jY2tan(r3θ2)=0 (1)
-jY1cot(r4θ1)+jY2tan(r4θ2)=0 (2)
-jY3cot(θ3)+jY4tan(θ4)=0 (3)
-jY3cot(r2θ3)+jY4tan(r2θ4)=0 (4)
Determine, f in equation group1, f2, f3, f4Respectively represent first passage wave filter, second channel wave filter,
Third channel wave filter, the passband central frequency of fourth lane wave filter, make r2=f2/f1,r3=f3/f1,
r4=f4/f1, above-mentioned Y1、θ1It is respectively Characteristic mobility and electrical length, the Y of the first short-circuited transmission line2、θ2
It is respectively Characteristic mobility and electrical length, the Y of the first open circuited transmission line3、θ3It is respectively the second short-circuited transmission line
Characteristic mobility and electrical length, Y4、θ4It is respectively Characteristic mobility and the electrical length of transmission line 4.
In this two-frequency duplex device, when channel bandpass filter 5 or channel bandpass filter 6 work,
The network of the second short-circuited transmission line 3 and the second open circuited transmission line 4 composition is in open-circuit condition, therefore passage
Band filter 7 and channel bandpass filter 8 do not work；Same, when channel bandpass filter 7 or
When channel bandpass filter 8 works, the first short-circuited transmission line 1 and the network of the first open circuited transmission line 2 composition
Being in open-circuit condition, therefore channel bandpass filter 3 and channel bandpass filter 4 do not work.So,
Compared to conventional T connector matching network or other prior aries, by transmission line 1,2,3,4 groups
The racemosus nodel line become loads matching network can preferably meet the insulated degree requirement of four-way duplexer.
The operating frequency of this two-frequency duplex device is designed as 1.8GHz, 2.2GHz, 3.5GHz, 4.0GHz,
The design parameter that can obtain racemosus nodel line loading matching network according to formula (1)-(4) is Z1=1/Y1=32 Ω,
Z2=1/Y2=131 Ω, θ1=θ2=52 °, Z3=1/Y3=40 Ω, Z4=1/Y4=131 Ω, θ3=θ4=61 °,
Wherein Z1, θ1It is respectively impedance and electrical length, the Z of transmission line 12, θ2It is respectively the impedance of transmission line 2
And electrical length, Z3, θ3It is respectively impedance and electrical length, the Z of transmission line 34, θ4It is respectively transmission line 4
Impedance and electrical length, θ1, θ2, θ3, θ4All it is defined on 1.8GHz.
As shown in Figure 6, transverse axis represents the signal frequency of this two-frequency duplex device to the emulation data of this two-frequency duplex device,
The longitudinal axis represents amplitude, including insertion loss (S21And S31) amplitude, return loss (S11) amplitude,
Isolation (S32) amplitude, wherein S21Represent the insertion loss of port1 to port2, S31Represent port1
To the insertion loss of port3, S11Represent the return loss of port1, S32Represent port2 and port3 it
Between isolation, its corresponding mathematical function is as follows: output/input power=20*log | S21| (or
20*log|S31|), reflection power/incident power=20*log | S11|, output/input power
=20*log | S32|。
As can be drawn from Figure 6, in four passbands, return loss | S11| and S33Absolute value more than 17DB,
Insertion loss S13Absolute value less than 2DB.In terms of the frequency range of 0 3.5Ghz, the isolation of duplexer
Degree S23Absolute value more than 50DB.In terms of the frequency range of 1 5Ghz, the isolation S of duplexer23's
Absolute value is more than 30DB.Meet two passages, the insulated degree requirement of four-way duplexer.It addition, this duplexer
Each passband both sides can produce several transmission zero, substantially increase Out-of-band rejection.
The present invention includes being not limited in the above-mentioned embodiment provided, and those skilled in the art are the present invention's
Under design, under the premise without departing from the principles of the invention, different deformation and replacement can be made, such as, will pass
Defeated line changes other resistance values or length value into, four minor matters lines of signal is loaded matching network and changes more minor matters into
The matching network that line loads, uses other transmission line type (such as strip line, coaxial line) to realize the present invention and carries
The structure etc. gone out, these deformation and replacement fall within this patent protection domain.
Claims (6)
1. use racemosus nodel line to load a two-frequency duplex device for matching network, in the manner of a printed circuit board
It is produced on two-sided shoe copper micro-strip plate, it is characterised in that: divide on the same face of described double-sided copper-clad micro-strip plate
Zhi Zuo there be signal incoming feeder port port1 (19), signal output feeder port port2 (20), letter
Number output feeder port port3 (21), first passage wave filter (5), second channel wave filter (6),
Triple channel wave filter (7), fourth lane wave filter (8), the first short-circuited transmission line (1), the second short circuit pass
Defeated line (3), the first open circuited transmission line (2), the second open circuited transmission line (4), the first output feeder (9),
Second output feeder (10), the 3rd output feeder (11), the 4th output feeder (12), this double-sided copper-clad
The another side of micro-strip plate is for covering copper earth plate；The bottom of the first output feeder (9) and signal output feeder end
The bottom of mouth port2 (20) vertically connects in reverse L-type, and the second output feeder (10) exports with signal
The lower horizontal of feeder line port port2 (20) connects, the most vertical with the bottom of the first output feeder (9)
Connect, and the first output feeder (9) constitutes an output feeder network with the second output feeder (10)；
The bottom of the 3rd output feeder (11) is vertical with the bottom of signal output feeder port port3 (21) to be connected
L-shaped, the 4th output feeder (12) connects with the lower horizontal of signal output feeder port port3 (21)
Connect, simultaneously the most vertical with the bottom of the 3rd output feeder (11) be connected, and the 3rd output feeder (11) with
4th output feeder (12) constitutes an output feeder network；First short-circuited transmission line (1) is short with second
Road transmission line (3) bottom connects and composes U-shaped, is positioned at the first output feeder (9) and the 3rd output feeder
(11), between, the centre, lower end of this U-shaped is vertical with feeder line port port1 to be connected, the first open-circuit transfer
Line (2) is vertical with the first short-circuited transmission line (1) to be connected in reverse L-type, the second open circuited transmission line (4)
Vertical with the second short-circuited transmission line (3) be connected L-shaped, and the second output feeder (10), first open circuit
Transmission line (2), the second open circuited transmission line (4), the 4th output feeder (12) horizontally set simultaneously and be positioned at
On same level line, the adjacent existence in one end of the second output feeder (10) and the first open circuited transmission line (2)
Coupling gap, the second open circuited transmission line (4) is adjacent with one end of the 4th output feeder (12) exists coupling
Gap；Described first passage wave filter (5), second channel wave filter (6) are positioned at the first output feeder (9)
And between the first short-circuited transmission line (1), wherein first passage wave filter (5) is positioned at the second output feeder (10)
With the surface of the first open circuited transmission line (2), second channel wave filter (6) is positioned at the second output feeder (10)
Underface with the first open circuited transmission line (2)；Described third channel wave filter (7), fourth lane filtering
Device (8) is positioned between the 3rd output feeder (11) and the second short-circuited transmission line (3), wherein third channel
Wave filter (7) is positioned at the surface of the second open circuited transmission line (4) and the 4th output feeder (12), and the 4th
Path filter (8) is positioned at the underface of the second open circuited transmission line (4) and the 4th output feeder (12).
A kind of two-frequency duplex device using racemosus nodel line to load matching network the most according to claim 1,
It is characterized in that: also making on the same face of described double-sided copper-clad micro-strip plate has the 5th ground short circuit via
And the 6th ground short circuit via (18) (17)；
Described first passage wave filter (5) is by the first micro-strip (5-1), the second micro-strip (5-2), the 3rd micro-
Band (5-3), the 4th micro-strip (5-4), the 5th micro-strip (5-5), the 6th micro-strip (5-6), the 7th micro-strip (5-7),
8th micro-strip (5-8) composition, wherein the first micro-strip, the 3rd micro-strip, the 6th micro-strip, the 8th micro-strip are horizontal
To level, it is parallel to the second output feeder (10) and the first open circuited transmission line (2), the second micro-strip,
Four micro-strip, the 5th micro-strip, the 7th micro-strip are longitudinal, are parallel to the first output feeder (9) short with first
Road transmission line (1), the two ends of the 3rd horizontal micro-strip connect with the top of the second longitudinal micro-strip, the 4th micro-strip
Connect composition inverted u-shaped, the two ends of the 6th horizontal micro-strip and the 5th longitudinal micro-strip, the top of the 7th micro-strip
Connect and compose inverted u-shaped, between the 4th micro-strip and the 5th micro-strip, there is coupling gap, and the 4th micro-strip and
The bottom of the 5th micro-strip is connected by the 5th ground short circuit via, and wherein the 5th ground short circuit via is positioned at second
The surface of the coupling gap between output feeder (10) and the first open circuited transmission line (2), the first micro-strip
Vertical with the bottom of the second micro-strip connecting and composing reverse L-type, the 8th micro-strip is vertical with the bottom of the 7th micro-strip to be connected
Connect composition L-type；
Described third channel wave filter (7) by the 9th micro-strip (7-1), the tenth micro-strip (7-2), the 11st
Micro-strip (7-3), the 12nd micro-strip (7-4), the 13rd micro-strip (7-5), the 14th micro-strip (7-6),
15 micro-strip (7-7), the 16th micro-strip (7-8) composition, wherein the 9th micro-strip, the 11st micro-strip, the
14 micro-strip, the 16th micro-strip are transverse horizontal, are parallel to the second open circuited transmission line (4) and the 4th defeated
Going out feeder line (12), the tenth micro-strip, the 12nd micro-strip, the 13rd micro-strip, the 15th micro-strip are longitudinal,
It is parallel to the 3rd output feeder (11) and the second short-circuited transmission line (3), the two ends of the 11st horizontal micro-strip
Inverted u-shaped, the 14th horizontal micro-strip is connected and composed with the tenth longitudinal micro-strip, the top of the 12nd micro-strip
Two ends connect and compose inverted u-shaped with the 13rd longitudinal micro-strip, the top of the 15th micro-strip, the 12nd is micro-
There is coupling gap between band and the 13rd micro-strip, and the bottom of the 12nd micro-strip and the 13rd micro-strip is passed through
6th ground short circuit via connect, wherein the 6th ground short circuit via be positioned at the second open circuited transmission line (4) and
The surface of the coupling gap between the 4th output feeder (12), the 9th micro-strip is vertical with the bottom of the tenth micro-strip
Directly connecting and composing reverse L-type, the 16th micro-strip is vertical with the bottom of the 15th micro-strip connects and composes L-type.
A kind of two-frequency duplex device using racemosus nodel line to load matching network the most according to claim 1,
It is characterized in that: described second channel wave filter (6) by the 17th micro-strip (6-1), the 18th micro-strip (6-2),
19th micro-strip (6-3), the 20th micro-strip (6-4), the 21st micro-strip (6-5), the 22nd micro-strip
(6-6) composition, wherein the 17th micro-strip, the 19th micro-strip, the 20th micro-strip, the 22nd micro-strip are
Transverse horizontal, it is parallel to the second open circuited transmission line (4) and the 4th output feeder (12), the 18th micro-strip,
21st micro-strip is longitudinal, is parallel to the first output feeder (9) and the first short-circuited transmission line (1),
The two ends of the 18th longitudinal micro-strip and 17 horizontal micro-strip, the bottom of the 19th micro-strip connect and compose to the left
The U-shaped of overturning shape, the two ends of the 21st longitudinal micro-strip and 20 horizontal micro-strip, the 22nd micro-
The bottom of band connects and composes the U-shaped of overturning shape to the right, and above-mentioned two U-shaped is back to setting, and the 18th is micro-
There is coupling gap between band and the 21st micro-strip, be positioned at the second output feeder (10) and pass with the first open circuit
The underface of the coupling gap between defeated line (2)；
Described fourth lane wave filter (8) by the 23rd micro-strip (8-1), the 24th micro-strip (8-2),
25th micro-strip (8-3), the 26th micro-strip (8-4), the 27th micro-strip (8-5), the 28th
Micro-strip (8-6) form, wherein the 23rd micro-strip, the 25th micro-strip, the 26th micro-strip, second
18 micro-strip are transverse horizontal, are parallel to the second output feeder (10) and the first open circuited transmission line (2),
24th micro-strip, the 27th micro-strip are longitudinal, are parallel to the 3rd output feeder (11) short with second
Road transmission line (3), the two ends of the 24th longitudinal micro-strip and 23 horizontal micro-strip, the 25th micro-
The bottom of band connects and composes the U-shaped of overturning shape to the left, and the two ends of the 27th longitudinal micro-strip are with horizontal
26 micro-strip, the bottom of the 28th micro-strip connect and compose the U-shaped of overturning shape to the right, above-mentioned two U
Back to setting, there is coupling gap between the 24th micro-strip and the 27th micro-strip in font, is positioned at second and opens
Coupling gap between road transmission line (4) and the 4th output feeder (12) underface.
A kind of two-frequency duplex device using racemosus nodel line to load matching network the most according to claim 1,
It is characterized in that: described first short-circuited transmission line (1), the second short-circuited transmission line (3), the first open circuit pass
Defeated line (2) and the second open circuited transmission line (4) collectively form racemosus nodel line and load matching network, and above-mentioned
The microwave transmission structure that four transmission lines use includes microstrip line, strip line, coaxial line or the line of rabbet joint.
A kind of two-frequency duplex device using racemosus nodel line to load matching network the most according to claim 1,
It is characterized in that: (the Y of described first short-circuited transmission line1, θ1), (Y of the first open circuited transmission line2, θ2)、
(the Y of the second short-circuited transmission line3, θ3) and (Y of the second open circuited transmission line4, θ4) by equation group
-jY1cot(r3θ1)+jY2tan(r3θ2)=0
-jY1cot(r4θ1)+jY2tan(r4θ2)=0
-jY3cot(θ3)+jY4tan(θ4)=0
-jY3cot(r2θ3)+jY4tan(r2θ4)=0
Determine, f in equation group1, f2, f3, f4Respectively represent first passage wave filter, second channel wave filter,
Third channel wave filter, the passband central frequency of fourth lane wave filter, make r2=f2/f1,r3=f3/f1,
r4=f4/f1, above-mentioned Y1、θ1It is respectively Characteristic mobility and electrical length, the Y of the first short-circuited transmission line2、θ2
It is respectively Characteristic mobility and electrical length, the Y of the first open circuited transmission line3、θ3It is respectively the second short-circuited transmission line
Characteristic mobility and electrical length, Y4、θ4It is respectively Characteristic mobility and the electrical length of the second open circuited transmission line.
6. described a kind of use racemosus nodel line to load the double of matching network according to claims 1 to 3 is arbitrary
Frequently duplexer, it is characterised in that: also make on the same face of described double-sided copper-clad micro-strip plate and have the first ground connection
Short circuit via (13), the second ground short circuit via (14), the 3rd ground short circuit via (15), the 4th connect
Ground short circuit via (16), wherein the first ground short circuit via and the first output feeder top connect, and second connects
Ground short circuit via and the first short-circuited transmission line top connect, the 3rd ground short circuit via and the second short-circuited transmission line
Top connects, and the 4th ground short circuit via and the 3rd output feeder top connect.
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| CN105489980A (en) * | 2015-12-18 | 2016-04-13 | 华南理工大学 | High-isolation low-pass and band-pass triplexer |
| CN107146931B (en) * | 2017-05-08 | 2019-10-18 | 华南理工大学 | A kind of adjustable micro-strip duplexer of four-way |
| CN112865716B (en) * | 2020-12-31 | 2023-03-28 | 四川天巡半导体科技有限责任公司 | Broadband high-efficiency power device based on multi-step branch matching network |
| CN112910435B (en) * | 2021-01-25 | 2023-03-17 | 武汉光谷航天三江激光产业技术研究院有限公司 | Duplexer device and network implementation method thereof |
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