CN104143672A - Dual-frequency duplexer provided with branchy pitch line loading matching network - Google Patents
Dual-frequency duplexer provided with branchy pitch line loading matching network Download PDFInfo
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- CN104143672A CN104143672A CN201410348690.XA CN201410348690A CN104143672A CN 104143672 A CN104143672 A CN 104143672A CN 201410348690 A CN201410348690 A CN 201410348690A CN 104143672 A CN104143672 A CN 104143672A
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Abstract
The invention discloses a dual-frequency duplexer provided with a branchy pitch line loading matching network. The dual-frequency duplexer is implemented through a micro-strip line structure, and is manufactured on a micro-strip board with the double sides wrapped with copper in a printed circuit board mode. The dual-frequency duplexer comprises a signal input feeder port 1, a signal output feeder port 2, a signal output feeder port 3, four channel filters and the branchy pitch line loading matching network. The matching network is composed of two short-circuit transmission lines and two open-circuit transmission lines. According to the dual-frequency duplexer provided with the branchy pitch line loading matching network, when any set of resonators work, the other set of resonators are in an open-circuit state, and the inter-channel inhibition effect is improved. Meanwhile, the matching network is small in size and simple in design and can be designed according to a theoretical design formula, the length value and resistance value of the transmission lines can be changed, the application range is wide, and flexibility is high.
Description
Technical field
The present invention relates to the technical field of Frequency Division Duplexing (FDD), particularly a kind of double frequency duplexer that uses racemosus nodel line to load matching network.
Background technology
Due to developing rapidly and people need to day by day increase radio communication of wireless communication technology, current market 2G, 3G, 4G network are also deposited, many wireless terminals, such as mobile phone, panel computer etc., in the time of design, all wish the compatible multiple communication standards of energy, this just can allow terminal use enjoy the service that different operators provides simultaneously.
Common FDD technology in communication industry, requires to have two communication ports: a data feedback channel and a down going channel.Now, in communication system, just must use duplexer.Traditional duplexer only can work in one group of up-downgoing frequency, the market coexisting for multiple communication standard, and such duplexer can not meet the demands.
Double frequency duplexer, i.e. four-way duplexer can work in two groups of up-downgoing frequencies simultaneously, greatly reduces volume and the cost of communication system.Now existing multiple scholars propose different four-way diplexer structures.The design of duplexer is mainly matching network.Core innovation of the present invention is to propose a novel racemosus nodel line that is applicable to four-way duplexer and loads matching network structure.The duplexer of many passbands requires there is good isolation effect between multiple passbands, requires device size as far as possible little simultaneously.
The high-isolation micro-strip duplexer of a kind of branched structure that data shows, the structure chart of this duplexer as shown in Figure 1, specifically please refer to " number of patent application: 201310547087.X, patent name: the high-isolation micro-strip duplexer of branched structure, patentee: the China Measures Institute ".The matching network of its use is as shown in Fig. 15 and 11, and this matching network only uses two simple uniform transmission lines, therefore, only can meet two requirements of passage duplexer to isolation, is but difficult to the insulated degree requirement of the duplexer that meets four-way.
The micro-strip duplexer of the another kind that data shows based on electromagnetism hybrid coupled, the structure chart of this duplexer as shown in Figure 2, specifically please refer to " number of patent application: 201310582773.0, patent name: a kind of micro-strip duplexer based on electromagnetism hybrid coupled, patentee: South China Science & Engineering University ".The matching network of its use is T connector, as shown in Fig. 28.Although use T connector as matching network in the technical scheme of this patent, equally only can meet the insulated degree requirement of double-channel duplex device, be difficult to the insulated degree requirement of the duplexer that meets four-way.
The duplexer of another four-way band that data shows, the structure chart of this duplexer as shown in Figure 3, specifically please refer to Hung-Wei Wu, Shih-Hua Huang and Yu-Fu Chen deliver the article that is entitled as " Design of New Quad-Channel Diplexer With Compact Circuit Size " on the top periodical of the art " IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS ".This duplexer is by two groups of resonators (be 1. 2. a group, be 3. 4. a group) and a matching network composition, and what matching network used is T connector, as the L in Fig. 3
3, L
4shown in.Such matching network, when one group of resonator works, cannot ensure that another group resonator, in open-circuit condition, is therefore difficult to realize four passages and all obtains good isolation effect therein.
Summary of the invention
The shortcoming that the object of the invention is to overcome prior art is with not enough, a kind of double frequency duplexer that uses racemosus nodel line to load matching network is provided, the novel matching network that a kind of racemosus nodel line loads is disclosed in duplexer of the present invention, can meet the insulated degree requirement of two passages, four-way duplexer, fill up the blank of prior art about the design of double frequency duplexer matching network.
Object of the present invention is achieved through the following technical solutions:
A kind of double frequency duplexer that uses racemosus nodel line to load matching network, be produced on the micro-band plate of two-sided shoe copper in the mode of printed circuit board (PCB), on the same face of the micro-band plate of described double-sided copper-clad, be manufactured with respectively signal incoming feeder port port1, signal output feeder port port2, signal output feeder port port3, first passage filter, second channel filter, third channel filter, four-way filter the first short-circuited transmission line, the second short-circuited transmission line, the first open circuited transmission line, the second open circuited transmission line, the first output feeder, the second output feeder, the 3rd output feeder, the 4th output feeder, the another side of the micro-band plate of this double-sided copper-clad is for covering copper ground plate, the bottom of the first output feeder with vertical connection of bottom of signal output feeder port port2 be reverse L-type, the bottom level connection joint of the second output feeder and signal output feeder port port2, simultaneously with vertical connection of bottom of the first output feeder, and an output feeder network of the first output feeder and the second output feeder formation, the bottom of the 3rd output feeder with vertical connection of bottom of signal output feeder port port3 be L-type, the bottom level connection joint of the 4th output feeder and signal output feeder port port3, simultaneously with vertical connection of bottom of the 3rd output feeder, and an output feeder network of the 3rd output feeder and the 4th output feeder formation, the first short-circuited transmission line and the second short-circuited transmission line bottom connect and compose U font, between the first output feeder and the 3rd output feeder, centre, lower end and vertical connection of feeder line port port1 of this U font, the first open circuited transmission line is reverse L-type with vertical connection of the first short-circuited transmission line, the second open circuited transmission line is L-type with vertical connection of the second short-circuited transmission line, and the second output feeder, the first open circuited transmission line, the second open circuited transmission line, simultaneously horizontally set and being positioned on same level line of the 4th output feeder, the adjacent coupling gap that exists in one end of the second output feeder and the first open circuited transmission line, the adjacent coupling gap that exists in one end of the second open circuited transmission line and the 4th output feeder, described first passage filter, second channel filter are between the first output feeder and the first short-circuited transmission line, wherein first passage filter be positioned at the second output feeder and the first open circuited transmission line directly over, second channel filter be positioned at the second output feeder and the first open circuited transmission line under, described third channel filter, four-way filter are between the 3rd output feeder and the second short-circuited transmission line, wherein third channel filter be positioned at the second open circuited transmission line and the 4th output feeder directly over, four-way filter be positioned at the second open circuited transmission line and the 4th output feeder under.
Preferably, on the same face of the micro-band plate of described double-sided copper-clad, be also manufactured with the 5th ground short circuit via hole and the 6th ground short circuit via hole, described first passage filter is by first micro-band, second micro-band, the 3rd micro-band, the 4th micro-band, the 5th micro-band, the 6th micro-band, the 7th micro-band, the 8th micro-band composition, wherein first micro-band, the 3rd micro-band, the 6th micro-band, the 8th micro-band is transverse horizontal, is parallel to the second output feeder and the first open circuited transmission line, second micro-band, the 4th micro-band, the 5th micro-band, the 7th micro-band is longitudinal, is parallel to the first output feeder and the first short-circuited transmission line, the two ends of the 3rd horizontal micro-band and longitudinal second micro-band, the top of the 4th micro-band connects and composes inverted u-shaped, the two ends of the 6th horizontal micro-band and longitudinal the 5th micro-band, the top of the 7th micro-band connects and composes inverted u-shaped, between the 4th micro-band and the 5th micro-band, there is coupling gap, and the bottom of the 4th micro-band and the 5th micro-band is connected by the 5th ground short circuit via hole, wherein the 5th ground short circuit via hole is directly over the coupling gap between the second output feeder and the first open circuited transmission line, the bottom of first micro-band and second micro-band is vertical connects and composes reverse L-type, the vertical L-type that connects and composes in bottom of the 8th micro-band and the 7th micro-band,
Described third channel filter is by the 9th micro-band, the tenth micro-band, the 11 micro-band, the 12 micro-band, the 13 micro-band, the 14 micro-band, the 15 micro-band, the 16 micro-band composition, wherein the 9th micro-band, the 11 micro-band, the 14 micro-band, the 16 micro-band is transverse horizontal, is parallel to the second open circuited transmission line and the 4th output feeder, the tenth micro-band, the 12 micro-band, the 13 micro-band, the 15 micro-band is longitudinal, is parallel to the 3rd output feeder and the second short-circuited transmission line, the two ends of the 11 horizontal micro-band and longitudinal the tenth micro-band, the top of the 12 micro-band connects and composes inverted u-shaped, the two ends of the 14 horizontal micro-band and the 13 longitudinal micro-band, the top of the 15 micro-band connects and composes inverted u-shaped, between the 12 micro-band and the 13 micro-band, there is coupling gap, and the bottom of the 12 micro-band and the 13 micro-band is connected by the 6th ground short circuit via hole, wherein the 6th ground short circuit via hole is directly over the coupling gap between the second open circuited transmission line and the 4th output feeder, the bottom of the 9th micro-band and the tenth micro-band is vertical connects and composes reverse L-type, the vertical L-type that connects and composes in bottom of the 16 micro-band and the 15 micro-band.
Preferably, described second channel filter is by the 17 micro-band, the 18 micro-band, the 19 micro-band, the 20 micro-band, the 21 micro-band, the 22 micro-band composition, wherein the 17 micro-band, the 19 micro-band, the 20 micro-band, the 22 micro-band is transverse horizontal, be parallel to the second open circuited transmission line and the 4th output feeder, the 24 micro-band, the 27 micro-band is longitudinal, be parallel to the first output feeder and the first short-circuited transmission line, the two ends of the 18 longitudinal micro-band and 17 horizontal micro-bands, the bottom of the 19 micro-band connects and composes the U font of overturning shape left, the two ends of the 21 longitudinal micro-band and 20 horizontal micro-bands, the bottom of the 22 micro-band connects and composes the U font of overturning shape to the right, above-mentioned two U fonts are back to setting, between the 18 micro-band and the 21 micro-band, there is coupling gap, under the coupling gap between the second output feeder and the first open circuited transmission line.
Described four-way filter is by the 23 micro-band, the 24 micro-band, the 25 micro-band, the 26 micro-band, the 27 micro-band, the 28 micro-band composition, wherein the 23 micro-band, the 25 micro-band, the 26 micro-band, the 28 micro-band is transverse horizontal, be parallel to the second output feeder and the first open circuited transmission line, the 18 micro-band, the 21 micro-band is longitudinal, be parallel to the 3rd output feeder and the second short-circuited transmission line, the two ends of the 24 longitudinal micro-band and 23 horizontal micro-bands, the bottom of the 25 micro-band connects and composes the U font of overturning shape left, the two ends of the 27 longitudinal micro-band and 26 horizontal micro-bands, the bottom of the 28 micro-band connects and composes the U font of overturning shape to the right, above-mentioned two U fonts are back to setting, between the 24 micro-band and the 27 micro-band, there is coupling gap, the coupling gap between the second open circuited transmission line and the 4th output feeder under.
Preferably, described the first short-circuited transmission line, the second short-circuited transmission line, the first open circuited transmission line and the second open circuited transmission line jointly form racemosus nodel line and load matching network, and the microwave transmission structure that above-mentioned four transmission lines adopt comprises microstrip line, strip line, coaxial line and the line of rabbet joint.
Preferably, (the Y of described the first short-circuited transmission line
1, θ
1), (Y of the first open circuited transmission line
2, θ
2), (Y of the second short-circuited transmission line
3, θ
3) and (Y of the second open circuited transmission line
4, θ
4) by equation group
-jY
1cot(r
3θ
1)+jY
2tan(r
3θ
2)＝0
-jY
1cot(r
4θ
1)+jY
2tan(r
4θ
2)＝0
-jY
3cot(θ
3)+jY
4tan(θ
4)＝0
-jY
3cot(r
2θ
3)+jY
4tan(r
2θ
4)＝0
Determine f in equation group
1, f
2, f
3, f
4the passband central frequency that represents respectively first passage filter, second channel filter, third channel filter, four-way filter, makes r
2=f
2/ f
1, r
3=f
3/ f
1, r
4=f
4/ f
1, above-mentioned Y
1, θ
1be respectively feature admittance and the electrical length of the first short-circuited transmission line, Y
2, θ
2be respectively feature admittance and the electrical length of the first open circuited transmission line, Y
3, θ
3be respectively feature admittance and the electrical length of the second short-circuited transmission line, Y
4, θ
4be respectively feature admittance and the electrical length of transmission line 4.
Preferably, on the same face of the micro-band plate of described double-sided copper-clad, be also manufactured with the first ground short circuit via hole, the second ground short circuit via hole, the 3rd ground short circuit via hole, the 4th ground short circuit via hole, wherein the first ground short circuit via hole is connected with the first output feeder top, the second ground short circuit via hole is connected with the first short-circuited transmission line top, the 3rd ground short circuit via hole is connected with the second short-circuited transmission line top, and the 4th ground short circuit via hole is connected with the 3rd output feeder top.
The present invention has following advantage and effect with respect to prior art:
The double frequency duplexer of the matching network that the racemosus nodel line that 1, the present invention uses loads, can be in the time of arbitrary group of resonator works, and another group resonator, all in open-circuit condition, has improved the inhibition between passage.
2, the matching network volume that the present invention proposes is little, uses the size of the duplexer of this matching network almost only to depend on filter size, and matching network has only increased a small amount of volume.
3. the matching network design process that the present invention proposes is simple, and design and filter construction are irrelevant, all can design according to the Theoretical Design formula of proposition, and therefore this matching network is applied widely.
Brief description of the drawings
Fig. 1 is the structural representation of the high-isolation micro-strip 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 a kind of duplexer of four-way band in prior art;
Fig. 4 is the structure chart that the racemosus nodel line in the duplexer design that proposes of the present invention loads matching network;
Fig. 5 is the structural representation of a kind of double frequency duplexer design that proposes of the present invention;
Fig. 6 is the simulation result schematic diagram of a kind of double frequency duplexer design that proposes of the present invention;
In figure, Reference numeral is: 1-the first short-circuited transmission line, 2-the first open circuited transmission line, 3-the second short-circuited transmission line, 4-the second open circuited transmission line, 5-first passage filter, the micro-band of 5-1-first, the micro-band of 5-2-second, 5-3-the 3rd micro-band, 5-4-the 4th micro-band, 5-5-the 5th micro-band, 5-6-the 6th micro-band, 5-7-the 7th micro-band, 5-8-the 8th micro-band, 6-second channel filter, 6-1-the 17 micro-band, 6-2-the 18 micro-band, 6-3-the 19 micro-band, 6-4-the 20 micro-band, 6-5-the 21 micro-band, 6-6-the 22 micro-band, 7-third channel filter, 7-1-the 9th micro-band, 7-2-the tenth micro-band, 7-3-the 11 micro-band, 7-4-the 12 micro-band, 7-5-the 13 micro-band, 7-6-the 14 micro-band, 7-7-the 15 micro-band, 7-8-the 16 micro-band, 8-four-way filter, 8-1-the 23 micro-band, 8-2-the 24 micro-band, 8-3-the 25 micro-band, 8-4-the 26 micro-band, 8-5-the 27 micro-band, 8-6-the 28 micro-band, 9-the first output feeder, 10-the second output feeder, 11-the 3rd output feeder, 12-the 4th output feeder, 13-the first ground short circuit via hole, 14-the second ground short circuit via hole, 15-the 3rd ground short circuit via hole, 16-the 4th ground short circuit via hole, 17-the 5th ground short circuit via hole, 18-the 6th ground short circuit via hole, 19-signal incoming feeder port port1, 20-signal output feeder port port2, 21-signal output feeder port port3.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
The structure chart of a kind of double frequency duplexer that uses racemosus nodel line loading matching network that the present invention proposes as shown in Figure 5, be produced on the micro-band plate of two-sided shoe copper in the mode of printed circuit board (PCB), on the same face of the micro-band plate of described double-sided copper-clad, be manufactured with respectively signal incoming feeder port port1, signal output feeder port port2, signal output feeder port port3 (mark 19 in corresponding diagram respectively, 20, 21), first passage filter 5, second channel filter 6, third channel filter 7, four-way filter 8, the first short-circuited transmission line 1, the second short-circuited transmission line 3, the first open circuited transmission line 2, the second open circuited transmission line 4, the first output feeder 9, the second output feeder 10, the 3rd output feeder 11, the 4th output feeder 12, the another side of the micro-band plate of this double-sided copper-clad is for covering copper ground plate.
The bottom of the first output feeder 9 with vertical connection of bottom of signal output feeder port port2 be reverse L-type, the bottom level connection joint of the second output feeder 10 and signal output feeder port port2, simultaneously with vertical connection of bottom of the first output feeder 9, and the first output feeder 9 and the second output feeder 10 form an output feeder network;
The bottom of the 3rd output feeder 11 with vertical connection of bottom of signal output feeder port port3 be L-type, the bottom level connection joint of the 4th output feeder 12 and signal output feeder port port3, simultaneously with vertical connection of bottom of the 3rd output feeder 11, and the 3rd output feeder 11 and the 4th output feeder 12 form an output feeder network;
The first short-circuited transmission line 1 and the second short-circuited transmission line 3 bottoms connect and compose U font, between the first output feeder 9 and the 3rd output feeder 11, centre, lower end and vertical connection of feeder line port port1 of this U font, the first open circuited transmission line 2 is reverse L-type with vertical connection of the first short-circuited transmission line 1, the second open circuited transmission line 4 is L-type with vertical connection of the second short-circuited transmission line 3, and the second output feeder 10, the first open circuited transmission line 2, the second open circuited transmission line 4, the 4th output feeder 12 horizontally set and being positioned on same level line simultaneously, the adjacent coupling gap that exists in one end of the second output feeder 10 and the first open circuited transmission line 2, the adjacent coupling gap that exists in one end of the second open circuited transmission line 4 and the 4th output feeder 12,
Described first passage filter 5, second channel filter 6 are between the first output feeder 9 and the first short-circuited transmission line 1, wherein first passage filter 5 be positioned at the second output feeder 10 and the first open circuited transmission line 2 directly over, second channel filter 6 be positioned at the second output feeder 10 and the first open circuited transmission line 2 under; Described third channel filter 7, four-way filter 8 are between the 3rd output feeder 11 and the second short-circuited transmission line 3, wherein third channel filter 7 be positioned at the second open circuited transmission line 4 and the 4th output feeder 12 directly over, four-way filter 8 be positioned at the second open circuited transmission line 4 and the 4th output feeder 12 under.
On the same face of the micro-band plate of described double-sided copper-clad, be also manufactured with the 5th ground short circuit via hole (17) and the 6th ground short circuit via hole 18;
Described first passage filter 5 is by first micro-band 5-1, second micro-band 5-2, the 3rd micro-band 5-3, the 4th micro-band 5-4, the 5th micro-band 5-5, the 6th micro-band 5-6, the 7th micro-band 5-7, the 8th micro-band 5-8 composition, wherein first micro-band, the 3rd micro-band, the 6th micro-band, the 8th micro-band is transverse horizontal, is parallel to the second output feeder 10 and the micro-band of the first open circuited transmission line 2, the second, the 4th micro-band, the 5th micro-band, the 7th micro-band is longitudinal, is parallel to the first output feeder 9 and the first short-circuited transmission line 1, the two ends of the 3rd horizontal micro-band and longitudinal second micro-band, the top of the 4th micro-band connects and composes inverted u-shaped, the two ends of the 6th horizontal micro-band and longitudinal the 5th micro-band, the top of the 7th micro-band connects and composes inverted u-shaped, between the 4th micro-band and the 5th micro-band, there is coupling gap, and the bottom of the 4th micro-band and the 5th micro-band is connected by the 5th ground short circuit via hole, wherein the 5th ground short circuit via hole is directly over the coupling gap between the second output feeder 10 and the first open circuited transmission line 2, the bottom of first micro-band and second micro-band is vertical connects and composes reverse L-type, the vertical L-type that connects and composes in bottom of the 8th micro-band and the 7th micro-band,
Described third channel filter 7 is by the 9th micro-band 7-1, the tenth micro-band 7-2, the 11 micro-band 7-3, the 12 micro-band 7-4, the 13 micro-band 7-5, the 14 micro-band 7-6, the 15 micro-band 7-7, the 16 micro-band 7-8 composition, wherein the 9th micro-band, the 11 micro-band, the 14 micro-band, the 16 micro-band is transverse horizontal, is parallel to the second open circuited transmission line 4 and the 4th output feeder 12, the ten micro-bands, the 12 micro-band, the 13 micro-band, the 15 micro-band is longitudinal, is parallel to the 3rd output feeder 11 and the second short-circuited transmission line 3, the two ends of the 11 horizontal micro-band and longitudinal the tenth micro-band, the top of the 12 micro-band connects and composes inverted u-shaped, the two ends of the 14 horizontal micro-band and the 13 longitudinal micro-band, the top of the 15 micro-band connects and composes inverted u-shaped, between the 12 micro-band and the 13 micro-band, there is coupling gap, and the bottom of the 12 micro-band and the 13 micro-band is connected by the 6th ground short circuit via hole, wherein the 6th ground short circuit via hole is directly over the coupling gap between the second open circuited transmission line 4 and the 4th output feeder 12, the bottom of the 9th micro-band and the tenth micro-band is vertical connects and composes reverse L-type, the vertical L-type that connects and composes in bottom of the 16 micro-band and the 15 micro-band.
Described second channel filter 6 is by the 17 micro-band 6-1, the 18 micro-band 6-2, the 19 micro-band 6-3, the 20 micro-band 6-4, the 21 micro-band 6-5, the 22 micro-band 6-6 composition, wherein the 17 micro-band, the 19 micro-band, the 20 micro-band, the 22 micro-band is transverse horizontal, be parallel to the second open circuited transmission line 4 and the 4th output feeder 12, the 24 micro-band, the 27 micro-band is longitudinal, be parallel to the first output feeder 9 and the first short-circuited transmission line 1, the two ends of the 18 longitudinal micro-band and 17 horizontal micro-bands, the bottom of the 19 micro-band connects and composes the U font of overturning shape left, the two ends of the 21 longitudinal micro-band and 20 horizontal micro-bands, the bottom of the 22 micro-band connects and composes the U font of overturning shape to the right, above-mentioned two U fonts are back to setting, between the 18 micro-band and the 21 micro-band, there is coupling gap, under the coupling gap between the second output feeder 10 and the first open circuited transmission line 2.
Described four-way filter 8 is by the 23 micro-band 8-1, the 24 micro-band 8-2, the 25 micro-band 8-3, the 26 micro-band 8-4, the 27 micro-band 8-5, the 28 micro-band 8-6 composition, wherein the 23 micro-band, the 25 micro-band, the 26 micro-band, the 28 micro-band is transverse horizontal, is parallel to the second output feeder 10 and the first open circuited transmission line 2, the 18 micro-bands, the 21 micro-band is longitudinal, is parallel to the 3rd output feeder 11 and the second short-circuited transmission line 3, the two ends of the 24 longitudinal micro-band and horizontal 23 micro-bands, the bottom of the 25 micro-band connects and composes the U font of overturning shape left, the two ends of the 27 longitudinal micro-band and horizontal 26 micro-bands, the bottom of the 28 micro-band connects and composes the U font of overturning shape to the right, above-mentioned two U fonts are back to setting, between the 24 micro-band and the 27 micro-band, there is coupling gap, the coupling gap between the second open circuited transmission line 4 and the 4th output feeder 12 under.
On the same face of the micro-band plate of described double-sided copper-clad, be also manufactured with the first ground short circuit via hole 13, the second ground short circuit via hole 14, the 3rd ground short circuit via hole 15, the 4th ground short circuit via hole 16, wherein the first ground short circuit via hole is connected with the first output feeder top, the second ground short circuit via hole is connected with the first short-circuited transmission line top, the 3rd ground short circuit via hole is connected with the second short-circuited transmission line top, and the 4th ground short circuit via hole is connected with the 3rd output feeder top.
Described the first short-circuited transmission line 1, the second short-circuited transmission line 3, the first open circuited transmission line 2 and the second open circuited transmission line 4 are common forms racemosus nodel line loading matching network, and the microwave transmission structure that above-mentioned four transmission lines adopt comprises microstrip line, strip line, coaxial line and the line of rabbet joint.The structure chart of the racemosus nodel line loading matching network in the duplexer design that the present invention proposes as shown in Figure 4.
The method for designing of this matching network is specific as follows:
Make f
1, f
2, f
3, f
4the passband central frequency that represents respectively first passage filter, second channel filter, third channel filter, four-way filter, makes r
2=f
2/ f
1, r
3=f
3/ f
1, r
4=f
4/ f
1, (the Y of described the first short-circuited transmission line
1, θ
1), (Y of the first open circuited transmission line
2, θ
2), (Y of the second short-circuited transmission line
3, θ
3) and (Y of the second open circuited transmission line
4, θ
4) by equation group
-jY
1cot(r
3θ
1)+jY
2tan(r
3θ
2)＝0 (1)
-jY
1cot(r
4θ
1)+jY
2tan(r
4θ
2)＝0 (2)
-jY
3cot(θ
3)+jY
4tan(θ
4)＝0 (3)
-jY
3cot(r
2θ
3)+jY
4tan(r
2θ
4)＝0 (4)
Determine f in equation group
1, f
2, f
3, f
4the passband central frequency that represents respectively first passage filter, second channel filter, third channel filter, four-way filter, makes r
2=f
2/ f
1, r
3=f
3/ f
1, r
4=f
4/ f
1, above-mentioned Y
1, θ
1be respectively feature admittance and the electrical length of the first short-circuited transmission line, Y
2, θ
2be respectively feature admittance and the electrical length of the first open circuited transmission line, Y
3, θ
3be respectively feature admittance and the electrical length of the second short-circuited transmission line, Y
4, θ
4be respectively feature admittance and the electrical length of transmission line 4.
In this double frequency duplexer, in the time that channel bandpass filter 5 or channel bandpass filter 6 are worked, the network that the second short-circuited transmission line 3 and the second open circuited transmission line 4 form is all in open-circuit condition, and therefore channel bandpass filter 7 and channel bandpass filter 8 are not worked; Same, in the time that channel bandpass filter 7 or channel bandpass filter 8 are worked, the network that the first short-circuited transmission line 1 and the first open circuited transmission line 2 form is all in open-circuit condition, and therefore channel bandpass filter 3 and channel bandpass filter 4 are not worked.So than conventional T connector matching network or other prior aries, the racemosus nodel line loading matching network being made up of transmission line 1,2,3,4 can meet the insulated degree requirement of four-way duplexer better.
The operating frequency of this double frequency duplexer is designed to 1.8GHz, 2.2GHz, 3.5GHz, 4.0GHz, and the design parameter that can obtain racemosus nodel line loading matching network according to formula (1)-(4) is Z
1=1/Y
1=32 Ω, Z
2=1/Y
2=131 Ω, θ
1=θ
2=52 °, Z
3=1/Y
3=40 Ω, Z
4=1/Y
4=131 Ω, θ
3=θ
4=61 °, wherein Z
1, θ
1be respectively impedance and the electrical length of transmission line 1, Z
2, θ
2be respectively impedance and the electrical length of transmission line 2, Z
3, θ
3be respectively impedance and the electrical length of transmission line 3, Z
4, θ
4be respectively impedance and the electrical length of transmission line 4, θ
1, θ
2, θ
3, θ
4all be defined in 1.8GHz.
As shown in Figure 6, transverse axis represents the signal frequency of this double frequency duplexer to the emulated data of this double frequency duplexer, and the longitudinal axis represents amplitude, comprises insertion loss (S
21and S
31) amplitude, return loss (S
11) amplitude, isolation (S
32) amplitude, wherein S
21represent the insertion loss of port1 to port2, S
31represent the insertion loss of port1 to port3, S
11represent the return loss of port1, S
32represent the isolation between port2 and port3, its corresponding mathematical function is as follows: power output/input power=20*log|S
21| (or 20*log|S
31|), reflection power/incident power=20*log|S
11|, power output/input power=20*log|S
32|.
As can be drawn from Figure 6, in four passbands, return loss | S
11| and S
33absolute value be greater than 17DB, insertion loss S
13absolute value be less than 2DB.From the frequency range of 0-3.5Ghz, the isolation S of duplexer
23absolute value be greater than 50DB.From the frequency range of 1-5Ghz, the isolation S of duplexer
23absolute value be greater than 30DB.Meet the insulated degree requirement of two passages, four-way duplexer.In addition, each passband both sides of this duplexer can produce several transmission zeros, have greatly improved Out-of-band rejection.
The present invention includes and be not limited in the above-mentioned embodiment providing; those skilled in the art are under design of the present invention; under the premise without departing from the principles of the invention; can make different distortion and replacement; for example transmission line is changed into other resistance values or length value; four minor matters lines of signal are loaded to matching network and change the matching network that more racemosus nodel line loads into; use other transmission line type (as strip line, coaxial line) to realize the structure etc. that the present invention proposes, these distortion and replace and also belong to this patent protection range.
Claims (6)
1. a double frequency duplexer that uses racemosus nodel line to load matching network, be produced on the micro-band plate of two-sided shoe copper in the mode of printed circuit board (PCB), it is characterized in that: on the same face of the micro-band plate of described double-sided copper-clad, be manufactured with respectively signal incoming feeder port port1 (19), signal output feeder port port2 (20), signal output feeder port port3 (21), first passage filter (5), second channel filter (6), third channel filter (7), four-way filter (8), the first short-circuited transmission line (1), the second short-circuited transmission line (3), the first open circuited transmission line (2), the second open circuited transmission line (4), the first output feeder (9), the second output feeder (10), the 3rd output feeder (11), the 4th output feeder (12), the another side of the micro-band plate of this double-sided copper-clad is for covering copper ground plate, the bottom of the first output feeder (9) with vertical connection of bottom of signal output feeder port port2 (20) be reverse L-type, the bottom level connection joint of the second output feeder (10) and signal output feeder port port2 (20), simultaneously with vertical connection of bottom of the first output feeder (9), and the first output feeder (9) forms an output feeder network with the second output feeder (10), the bottom of the 3rd output feeder (11) with vertical connection of bottom of signal output feeder port port3 (21) be L-type, the bottom level connection joint of the 4th output feeder (12) and signal output feeder port port3 (21), simultaneously with vertical connection of bottom of the 3rd output feeder (11), and the 3rd output feeder (11) forms an output feeder network with the 4th output feeder (12), the first short-circuited transmission line (1) connects and composes U font with the second short-circuited transmission line (3) bottom, be positioned between the first output feeder (9) and the 3rd output feeder (11), centre, lower end and vertical connection of feeder line port port1 of this U font, the first open circuited transmission line (2) is reverse L-type with vertical connection of the first short-circuited transmission line (1), the second open circuited transmission line (4) is L-type with vertical connection of the second short-circuited transmission line (3), and the second output feeder (10), the first open circuited transmission line (2), the second open circuited transmission line (4), simultaneously horizontally set and being positioned on same level line of the 4th output feeder (12), the adjacent coupling gap that exists in one end of the second output feeder (10) and the first open circuited transmission line (2), the adjacent coupling gap that exists in one end of the second open circuited transmission line (4) and the 4th output feeder (12), described first passage filter (5), second channel filter (6) are positioned between the first output feeder (9) and the first short-circuited transmission line (1), wherein first passage filter (5) be positioned at the second output feeder (10) and the first open circuited transmission line (2) directly over, second channel filter (6) be positioned at the second output feeder (10) and the first open circuited transmission line (2) under, described third channel filter (7), four-way filter (8) are positioned between the 3rd output feeder (11) and the second short-circuited transmission line (3), wherein third channel filter (7) be positioned at the second open circuited transmission line (4) and the 4th output feeder (12) directly over, four-way filter (8) is positioned under the second open circuited transmission line (4) and the 4th output feeder (12).
2. a kind of double frequency duplexer that uses racemosus nodel line to load matching network according to claim 1, is characterized in that: on the same face of the micro-band plate of described double-sided copper-clad, be also manufactured with the 5th ground short circuit via hole (17) and the 6th ground short circuit via hole (18);
Described first passage filter (5) is by first micro-band (5-1), second micro-band (5-2), the 3rd micro-band (5-3), the 4th micro-band (5-4), the 5th micro-band (5-5), the 6th micro-band (5-6), the 7th micro-band (5-7), the 8th micro-band (5-8) composition, wherein first micro-band, the 3rd micro-band, the 6th micro-band, the 8th micro-band is transverse horizontal, is parallel to the second output feeder (10) and the first open circuited transmission line (2), second micro-band, the 4th micro-band, the 5th micro-band, the 7th micro-band is longitudinal, is parallel to the first output feeder (9) and the first short-circuited transmission line (1), the two ends of the 3rd horizontal micro-band and longitudinal second micro-band, the top of the 4th micro-band connects and composes inverted u-shaped, the two ends of the 6th horizontal micro-band and longitudinal the 5th micro-band, the top of the 7th micro-band connects and composes inverted u-shaped, between the 4th micro-band and the 5th micro-band, there is coupling gap, and the bottom of the 4th micro-band and the 5th micro-band is connected by the 5th ground short circuit via hole, wherein the 5th ground short circuit via hole be positioned at coupling gap between the second output feeder (10) and the first open circuited transmission line (2) directly over, the bottom of first micro-band and second micro-band is vertical connects and composes reverse L-type, the vertical L-type that connects and composes in bottom of the 8th micro-band and the 7th micro-band,
Described third channel filter (7) is by the 9th micro-band (7-1), the tenth micro-band (7-2), the 11 micro-band (7-3), the 12 micro-band (7-4), the 13 micro-band (7-5), the 14 micro-band (7-6), the 15 micro-band (7-7), the 16 micro-band (7-8) composition, wherein the 9th micro-band, the 11 micro-band, the 14 micro-band, the 16 micro-band is transverse horizontal, is parallel to the second open circuited transmission line (4) and the 4th output feeder (12), the tenth micro-band, the 12 micro-band, the 13 micro-band, the 15 micro-band is longitudinal, is parallel to the 3rd output feeder (11) and the second short-circuited transmission line (3), the two ends of the 11 horizontal micro-band and longitudinal the tenth micro-band, the top of the 12 micro-band connects and composes inverted u-shaped, the two ends of the 14 horizontal micro-band and the 13 longitudinal micro-band, the top of the 15 micro-band connects and composes inverted u-shaped, between the 12 micro-band and the 13 micro-band, there is coupling gap, and the bottom of the 12 micro-band and the 13 micro-band is connected by the 6th ground short circuit via hole, wherein the 6th ground short circuit via hole be positioned at coupling gap between the second open circuited transmission line (4) and the 4th output feeder (12) directly over, the bottom of the 9th micro-band and the tenth micro-band is vertical connects and composes reverse L-type, the vertical L-type that connects and composes in bottom of the 16 micro-band and the 15 micro-band.
3. a kind of double frequency duplexer that uses racemosus nodel line to load matching network according to claim 1, it is characterized in that: described second channel filter (6) is by the 17 micro-band (6-1), the 18 micro-band (6-2), the 19 micro-band (6-3), the 20 micro-band (6-4), the 21 micro-band (6-5), the 22 micro-band (6-6) composition, wherein the 17 micro-band, the 19 micro-band, the 20 micro-band, the 22 micro-band is transverse horizontal, be parallel to the second open circuited transmission line (4) and the 4th output feeder (12), the 24 micro-band, the 27 micro-band is longitudinal, be parallel to the first output feeder (9) and the first short-circuited transmission line (1), the two ends of the 18 longitudinal micro-band and 17 horizontal micro-bands, the bottom of the 19 micro-band connects and composes the U font of overturning shape left, the two ends of the 21 longitudinal micro-band and 20 horizontal micro-bands, the bottom of the 22 micro-band connects and composes the U font of overturning shape to the right, above-mentioned two U fonts are back to setting, between the 18 micro-band and the 21 micro-band, there is coupling gap, be positioned at coupling gap between the second output feeder (10) and the first open circuited transmission line (2) under.
Described four-way filter (8) is by the 23 micro-band (8-1), the 24 micro-band (8-2), the 25 micro-band (8-3), the 26 micro-band (8-4), the 27 micro-band (8-5), the 28 micro-band (8-6) composition, wherein the 23 micro-band, the 25 micro-band, the 26 micro-band, the 28 micro-band is transverse horizontal, be parallel to the second output feeder (10) and the first open circuited transmission line (2), the 18 micro-band, the 21 micro-band is longitudinal, be parallel to the 3rd output feeder (11) and the second short-circuited transmission line (3), the two ends of the 24 longitudinal micro-band and 23 horizontal micro-bands, the bottom of the 25 micro-band connects and composes the U font of overturning shape left, the two ends of the 27 longitudinal micro-band and 26 horizontal micro-bands, the bottom of the 28 micro-band connects and composes the U font of overturning shape to the right, above-mentioned two U fonts are back to setting, between the 24 micro-band and the 27 micro-band, there is coupling gap, be positioned at coupling gap between the second open circuited transmission line (4) and the 4th output feeder (12) under.
4. a kind of double frequency duplexer that uses racemosus nodel line to load matching network according to claim 1, it is characterized in that: described the first short-circuited transmission line (1), the second short-circuited transmission line (3), the first open circuited transmission line (2) and the second open circuited transmission line (4) jointly form racemosus nodel line and load matching network, and the microwave transmission structure that above-mentioned four transmission lines adopt comprises microstrip line, strip line, coaxial line and the line of rabbet joint.
5. a kind of double frequency duplexer that uses racemosus nodel line to load matching network according to claim 1, is characterized in that: (the Y of described the first short-circuited transmission line
1, θ
1), (Y of the first open circuited transmission line
2, θ
2), (Y of the second short-circuited transmission line
3, θ
3) and (Y of the second open circuited transmission line
4, θ
4) by equation group
-jY
1cot(r
3θ
1)+jY
2tan(r
3θ
2)＝0
-jY
1cot(r
4θ
1)+jY
2tan(r
4θ
2)＝0
-jY
3cot(θ
3)+jY
4tan(θ
4)＝0
-jY
3cot(r
2θ
3)+jY
4tan(r
2θ
4)＝0
Determine f in equation group
1, f
2, f
3, f
4the passband central frequency that represents respectively first passage filter, second channel filter, third channel filter, four-way filter, makes r
2=f
2/ f
1, r
3=f
3/ f
1, r
4=f
4/ f
1, above-mentioned Y
1, θ
1be respectively feature admittance and the electrical length of the first short-circuited transmission line, Y
2, θ
2be respectively feature admittance and the electrical length of the first open circuited transmission line, Y
3, θ
3be respectively feature admittance and the electrical length of the second short-circuited transmission line, Y
4, θ
4be respectively feature admittance and the electrical length of transmission line 4.
6. according to the arbitrary described a kind of double frequency duplexer that uses racemosus nodel line to load matching network of claims 1 to 3, it is characterized in that: on the same face of the micro-band plate of described double-sided copper-clad, be also manufactured with the first ground short circuit via hole (13), the second ground short circuit via hole (14), the 3rd ground short circuit via hole (15), the 4th ground short circuit via hole (16), wherein the first ground short circuit via hole is connected with the first output feeder top, the second ground short circuit via hole is connected with the first short-circuited transmission line top, the 3rd ground short circuit via hole is connected with the second short-circuited transmission line top, the 4th ground short circuit via hole is connected with the 3rd output feeder top.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048029A (en) * | 2015-08-27 | 2015-11-11 | 华南理工大学 | Miniaturized duplexer with wide stop band and high isolation characteristic |
| CN105489980A (en) * | 2015-12-18 | 2016-04-13 | 华南理工大学 | High-isolation low-pass and band-pass triplexer |
| CN107146931A (en) * | 2017-05-08 | 2017-09-08 | 华南理工大学 | A kind of adjustable micro-strip duplexer of four-way |
| CN112865716A (en) * | 2020-12-31 | 2021-05-28 | 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 |
| CN112910435A (en) * | 2021-01-25 | 2021-06-04 | 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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|---|---|---|---|---|
| JP2004336605A (en) * | 2003-05-12 | 2004-11-25 | Toshiba Corp | Band pass filter |
| CN204067530U (en) * | 2014-07-21 | 2014-12-31 | 华南理工大学 | A kind of two-frequency duplex device using racemosus nodel line to load matching network |
-
2014
- 2014-07-21 CN CN201410348690.XA patent/CN104143672B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004336605A (en) * | 2003-05-12 | 2004-11-25 | Toshiba Corp | Band pass filter |
| CN204067530U (en) * | 2014-07-21 | 2014-12-31 | 华南理工大学 | A kind of two-frequency duplex device using racemosus nodel line to load matching network |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048029A (en) * | 2015-08-27 | 2015-11-11 | 华南理工大学 | Miniaturized duplexer with wide stop band and high isolation characteristic |
| CN105048029B (en) * | 2015-08-27 | 2019-05-14 | 华南理工大学 | A kind of miniaturized duplexer with Wide stop bands high isolation characteristic |
| CN105489980A (en) * | 2015-12-18 | 2016-04-13 | 华南理工大学 | High-isolation low-pass and band-pass triplexer |
| CN107146931A (en) * | 2017-05-08 | 2017-09-08 | 华南理工大学 | A kind of adjustable micro-strip duplexer of four-way |
| CN107146931B (en) * | 2017-05-08 | 2019-10-18 | 华南理工大学 | A kind of adjustable micro-strip duplexer of four-way |
| CN112865716A (en) * | 2020-12-31 | 2021-05-28 | 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 |
| CN112910435A (en) * | 2021-01-25 | 2021-06-04 | 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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|---|---|
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