CN109802213A - A kind of 90 degree of tri- port 3dB plane electric bridge - Google Patents
A kind of 90 degree of tri- port 3dB plane electric bridge Download PDFInfo
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- CN109802213A CN109802213A CN201811593516.6A CN201811593516A CN109802213A CN 109802213 A CN109802213 A CN 109802213A CN 201811593516 A CN201811593516 A CN 201811593516A CN 109802213 A CN109802213 A CN 109802213A
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Abstract
The invention discloses a kind of 90 degree of tri- port 3dB plane electric bridges, belong to microwave technical field, the plane electric bridge includes 180 degree balun and 90 degree of coupled mode phase shifters, 180 degree balun uses broadside coupled Manchand balun, 90 degree of coupled mode phase shifters use directional couple phase shifter, by the input terminal that one of balun uneven output port is connected to 90 degree of coupled mode phase shifters by connecting line, another uneven output end output phase differs 90 degree to phase shifter output end with balun, thus constitutes 90 degree of tri- port 3dB plane electric bridge.Plane electric bridge of the present invention is realized three-dimensionally integrated using low-temperature co-fired ceramics (LTCC) technology, realize the miniaturization of volume, with relatively flat in passband, return loss is small, the output signal power of output port is consistent, port match is good, stability is high, integrated level is high, the advantages such as easy to process, suitable for the communications fields such as radio frequency integrated system.
Description
Technical field
The invention belongs to microwave technical field, in particular to a kind of 90 degree of tri- port 3dB plane electric bridge.
Background technique
With the development of modern communications technology, for the miniaturization of passive electronic, high performance requirement also continuous
It improves.Electric bridge can regard a kind of special directional coupler as, directional coupler in microwave radio field using relatively broad,
Input signal is mainly carried out by power distribution according to desired direction and ratio.It is fixed as the core devices in radio frequency system
It is widely used in balanced type to coupler to switch, in the power device and radio-frequency system in signal generator.
Initial directional coupler mostly uses rectangular waveguide, but volume is very huge, extensive with microstrip line in strip line
After, the volume-diminished of element many, but since the medium substrate used is more traditional, still it is not suitable for three-dimensional knot
The design of structure or multilayered structure.Currently used 3dB directional coupler mainly has coupling line style directional coupler and micro-strip point
Branch coupler needs to increase coupling joint number to increase bandwidth of operation, will increase coupling in this way for coupling line style directional coupler
The volume of device；For microstrip branch coupler, since its medium used is non-uniform dielectric, although structure relatively easy one
A bit, but its frequency band is relatively narrow, and performance is poor.It is domestic at present also less for the exploitation of the correlative study of directional coupler, in coupling
It does not catch up with the leading level in the world in the miniaturization of clutch volume.
Summary of the invention
The technical issues of all solutions of the present invention be to provide it is a kind of have small in size, passband is flat, input vswr is small,
Insertion loss is small, stability is strong, 90 degree of tri- port the 3dB plane electric bridge of the advantages such as easy of integration.
The technical solution for realizing the aim of the invention is as follows: a kind of 90 degree of tri- port 3dB plane electric bridge, including is arranged in parallel
Bottom ground layer, intermediate grounded layer, top ground plane, and along perpendicular to ground plane direction be disposed adjacent be located at bottom
180 degree balun between ground plane and top ground plane, 90 degree of coupled modes between Bottom ground layer, intermediate grounded layer are moved
Phase device；
Close to 180 degree balun and far from the side of 90 degree of coupled mode phase shifters, first input port, the first output end are set
Mouthful；Close to 90 degree of coupled mode phase shifters and second output terminal mouth is arranged in the side far from balun；180 degree balun, 90 degree of coupled modes
The common side setting rear side ground terminal of phase shifter, common other side setting front side ground terminal；
The 180 degree balun includes being set between intermediate grounded layer and top ground plane and being parallel to the balun of ground plane
First segment coupling line, is set between Bottom ground layer and intermediate grounded layer and the balun second segment for being parallel to ground plane couples
Line；The balun first segment coupling line includes balun first segment lower layer's coupling line and in parallel and composition coupling relatively
Balun first segment upper layer coupling line；Balun second segment coupling line includes balun second segment lower layer's coupling line and in parallel
And balun second segment upper layer coupling line that is opposite and constituting coupling；Balun first segment lower layer's coupling line and balun second segment upper layer coupling
Zygonema is opposite in parallel；
90 degree of coupled mode phase shifters include being set between Bottom ground layer and intermediate grounded layer and being parallel to ground connection
The phase shifter coupling line of layer comprising phase shifter upper layer coupling line, the phase shifter lower layer coupling line being parallel to each other；
The first input port is connected by input port connecting line with one end of balun first segment lower layer coupling line, bar
The other end of human relations first segment lower layer coupling line is coupled by the second binding post through intermediate grounded layer with balun second segment upper layer
Line is connected；One end of balun first segment upper layer coupling line passes through the by the first ground line connection rear side ground terminal, the other end
One binding post, the first output port connecting line are connected with the first output port；One end of balun second segment lower layer coupling line passes through
Second ground line connection rear side ground terminal, the other end pass through third binding post, the 4th connecting line and phase shifter lower layer coupling line
One end be connected, the other end of phase shifter lower layer coupling line passes through the 4th ground line connection front side ground terminal；Phase shifter upper layer coupling
One end of zygonema is grounded connection front side ground terminal by third, and the other end is defeated by second output terminal mouth connecting line and second
Exit port is connected.
Compared with prior art, the present invention its remarkable advantage are as follows: 1) present invention uses low-temperature co-fired ceramics (LTCC) technique
Technology is realized three-dimensionally integrated, realizes that amplitude is approximately uniform using three ports, 90 degree of phase phase difference of two-way output signal；2) originally
Invention have passband in it is relatively flat, return loss is small, the output signal power phase of output port is consistent, port match is good,
The advantages such as stability height can be widely used in the communications fields such as communication radio frequency system.
The present invention is described in further detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the tri- 90 degree of plane electric bridges in port of 3dB of the present invention, wherein (a) is facing for plane electric bridge
Figure is (b) top view of plane electric bridge；It (c) is the primary structure schematic diagram of plane electric bridge.
Fig. 2 is the amplitude-versus-frequency curve figure of each output port in the plane electric bridge of 90 degree of tri- port 3dB in the embodiment of the present invention.
Fig. 3 is the standing wave curve graph of first input port in the plane electric bridge of 90 degree of tri- port 3dB in the embodiment of the present invention.
Fig. 4 is the output phase curve graph of each output port in the plane electric bridge of 90 degree of tri- port 3dB in the embodiment of the present invention.
Specific embodiment
In conjunction with Fig. 1, a kind of 90 degree of tri- port 3dB of the invention plane electric bridge, including Bottom ground layer sd2 disposed in parallel,
Intermediate grounded layer sd3, top ground plane sd1, and it is located at Bottom ground layer along what is be disposed adjacent perpendicular to ground plane direction
180 degree balun 1 between sd2 and top ground plane sd1,90 degree between Bottom ground layer sd2, intermediate grounded layer sd3
Coupled mode phase shifter 2；
Close to 180 degree balun 1 and far from the side of 90 degree of coupled mode phase shifters 2, first input port Input is set
Port, the first output port Output port 1；Close to 90 degree of coupled mode phase shifters 2 and the side far from 180 degree balun 1 is set
Set second output terminal mouth Output port 2；The common side setting rear side of 1,90 degree of coupled mode phase shifter 2 of 180 degree balun connects
Ground terminal GND1, common other side setting front side ground terminal GND2；
180 degree balun 1 includes being set between intermediate grounded layer sd3 and top ground plane sd1 and being parallel to ground plane
Balun first segment coupling line is set between Bottom ground layer sd2 and intermediate grounded layer sd3 and is parallel to the balun of ground plane
Two sections of coupling lines；Balun first segment coupling line include balun first segment lower layer coupling line BLla and it is in parallel and opposite and
Constitute the balun first segment upper layer coupling line BL1b of coupling；Balun second segment coupling line includes balun second segment lower layer coupling line
BL2a and balun second segment upper layer coupling line BL2b that is in parallel and opposite and constituting coupling；Balun first segment lower layer coupling
Zygonema BLla is parallel with balun second segment upper layer coupling line BL2b opposite；
90 degree of coupled mode phase shifters 2 include being set between Bottom ground layer sd2 and intermediate grounded layer sd3 and being parallel to connect
The phase shifter coupling line on stratum comprising phase shifter upper layer coupling line Cpl1, the phase shifter lower layer coupling line Cpl2 being parallel to each other；
First input port Input port passes through input port connecting line L1 and balun first segment lower layer coupling line BLla
One end be connected, the other end of balun first segment lower layer coupling line BLla passes through the second binding post for running through intermediate grounded layer sd3
H2 is connected with balun second segment upper layer coupling line BL2b；One end of balun first segment upper layer coupling line BL1b passes through the first ground line
Ground terminal GND1 on rear side of Ld1 connection, the other end pass through the first binding post H1, the first output port connecting line L2 and the first output
Port Output port 1 is connected；One end of balun second segment lower layer coupling line BL2a passes through the second ground line Ld2 connection rear side
Ground terminal GND1, one end that the other end passes through third binding post H3, the 4th connecting line L4 and phase shifter lower layer coupling line Cpl2
It is connected, the other end of phase shifter lower layer coupling line Cpl2 passes through ground terminal GND2 on front side of the 4th ground line Ld4 connection；On phase shifter
One end of layer coupling line Cpl1 is grounded ground terminal GND2 on front side of Ld3 connection by third, and the other end passes through second output terminal
Mouth connecting line L3 is connected with second output terminal mouth Output port 2.
Further, input port connecting line L1 is coupled by first input port connecting plate C1 with balun first segment lower layer
One end of line BLla is connected；First output port connecting line L2 passes through the first output port connecting plate C2 and the first output port
Output port 1 is connected；4th connecting line L4 passes through the 4th connecting plate C4, the 5th connecting plate C5 and phase shifter lower layer coupling line
One end of Cpl2 is connected；One end of phase shifter upper layer coupling line Cpl1 passes through second output terminal mouth connecting plate C3 and second output terminal
Mouth connecting line L3 is connected.
Further, balun first segment lower layer coupling line BLla and balun second segment upper layer coupling line BL2b forms half-wavelength
Coupling.
Further, balun first segment upper layer coupling line BL1b, balun first segment lower layer coupling line BL1a, balun second segment
Upper layer coupling line BL2b, balun second segment lower layer coupling line BL2a, phase shifter upper layer coupling line Cpl1, phase shifter lower layer coupling line
Cpl2 is quarter-wave coupling line.
Further, first input port Input port, the first output port Output port 1, second output terminal
The characteristic impedance of mouth Output port 2 is 50 ohm.
Further, first input port Input port, the first output port Output port 1, second output terminal
Mouthful Output port 2, front side ground terminal GND2, rear side ground terminal GND1, top ground plane sd1, Bottom ground layer sd2, in
It is indirect stratum sd3, input port connecting line L1, first input port connecting plate C1, the first output port connecting plate C2, second defeated
Exit port connecting plate C3, the first output port connecting line L2, second output terminal mouth connecting line L3, balun first segment upper layer coupling line
BL1b, balun first segment lower layer coupling line BL1a, balun second segment upper layer coupling line BL2b, balun second segment lower layer coupling line
BL2a, the 4th connecting line L4, the 4th connecting plate C4, the 5th connecting plate C5, phase shifter upper layer coupling line Cpl1, phase shifter lower layer coupling
Zygonema Cpl2, the first ground line Ld1, the second ground line Ld2, third ground line Ld3, the 4th ground line Ld4, the first binding post
H1, the second binding post H2, third binding post H3 pass through the realization of low-temperature co-fired ceramics LTCC technology.
Further, balun first segment upper layer coupling line BL1b, balun first segment lower layer coupling line BL1a, balun second segment
Upper layer coupling line BL2b, balun second segment lower layer coupling line BL2a are helix structure.
Further, phase shifter upper layer coupling line Cpl1, phase shifter lower layer coupling line Cpl2 are snakelike meander line structure.
90 degree of tri- port 3dB plane electric bridge of the invention, its working principle is that: balun part utilizes Marchand balun knot
Structure, by balun first segment upper layer coupling line BL1b, balun first segment lower layer coupling line BL1a, balun second segment upper layer coupling line
BL2b, balun second segment lower layer coupling line BL2a composition, above-mentioned four layers of coupling line is by quarter-wave coupling line structure
At signal is inputted from first input port Input port enters balun first segment lower layer by first input port connecting plate C1
The other end of coupling line BL1a, balun first segment lower layer coupling line BL1a connect the upper end of the second binding post H2, the second binding post
The lower end of H2 connects balun second segment upper layer coupling line BL2b, and the other end of balun second segment upper layer coupling line BL2b is opened a way, by
Two sections of quarter-wave coupling lines are connected the coupling line segment to form half-wavelength, balun first segment upper layer coupling line by this
BL1b is one section of quarter-wave coupling line, positioned at the top of balun first segment lower layer coupling line BLla, with balun first
Section lower layer coupling line BLla forms coupling, obtains energy, energy is by coupling the open circuit with balun second segment upper layer coupling line BL2b
The energy two parts being reflected back are held to constitute, balun first segment upper layer coupling line BL1b is exported by the first binding post H1 connection first
One end of port connecting line L2, the other end of the first output port connecting line L2 are connected to the first output port Output port
1, thus signal exports the signal for falling behind 270 ° of phases of input signal, balun second from the first output port Output port 1
Section lower layer coupling line BL2a is one section of quarter-wave coupling line, under the coupling line BL2b of balun second segment upper layer
Side couples, balun second segment lower layer coupling line BL2a connection third binding post with balun second segment upper layer coupling line BL2b composition
The port output phase of H3 falls behind 90 ° of signal, and signal is connected to the 4th connecting line L4, the 4th connection by third binding post H3
The other end of line L4 connects the 4th connecting plate C4, and the other end of the 4th connecting plate C4 passes through under the 5th connecting plate C5 connection phase shifter
One end of layer coupling line Cpl2, connection the 4th connects after the line segment that phase shifter lower layer coupling line Cpl2 passes through quarter-wave length
The other end connection front side ground terminal GND2, phase shifter upper layer coupling line Cpl1 of ground wire Ld4, the 4th ground line Ld4 are located at phase shift
The surface of device lower layer coupling line Cpl2, two sections of strip lines constitute coupling line, and signal makes phase through quarter-wave coupling line
Position falls behind 90 ° relatively, and one end of phase shifter upper layer coupling line Cpl1 is exported by second output terminal mouth connecting plate C3 connection second
The other end of one end of port connecting line L3, second output terminal mouth connecting line L3 connects second output terminal mouth Output port 2,
Signal is exported through second output terminal mouth Output port 2 falls behind 180 ° of input signal, as a result, first input port Output
Port 1 differs 90 ° with the signal output phase of second output terminal mouth Output port 2, and amplitude is roughly the same, realizes 3dB
Three 90 degree of port plane electric bridges.
One point of three road bandpass filtering power splitter based on LTCC is realized three-dimensional by low-temperature co-fired ceramics LTCC technology
It is three-dimensionally integrated, therefore have many advantages, such as that miniaturization, stability is strong, be easily integrated, production cost is low, with short production cycle.
Embodiment
The size of the tri- 90 degree of plane electric bridges in port of 3dB in the embodiment of the present invention is only 2.5mm × 5.6mm × 1.2mm, work
Working frequency is 1.74GHz~2.04GHz.The amplitude-versus-frequency curve figure of each output port of the plane electric bridge of acquisition, the first input
Standing wave curve graph, the output phase curve graph of each output port difference of port are as shown in Figure 2,3, 4.
The first output port Output port 1 and second output terminal mouth Output it can be seen from Fig. 2, Fig. 3, Fig. 4
2 output waveform of port is almost the same, and passband is relatively flat, and port insertion loss is less than 0.6dB, first input port INPUT's
Return loss is better than 16dB, and the phase difference output of output port is 90 °+10 °.
To sum up, the present invention is realized three-dimensionally integrated using low-temperature co-fired ceramics (LTCC) technology, realizes the small of volume
Type, have passband in it is relatively flat, return loss is small, the output signal power of output port is consistent, port match is good, stablize
Property it is high, integrated level is high, the advantages such as easy to process, suitable for the communications fields such as radio frequency integrated system.
Claims (9)
1. a kind of 90 degree of tri- port 3dB plane electric bridge, which is characterized in that including Bottom ground layer (sd2) disposed in parallel, centre
Ground plane (sd3), top ground plane (sd1), and it is located at Bottom ground layer along what is be disposed adjacent perpendicular to ground plane direction
(sd2) the 180 degree balun (1) between top ground plane (sd1), be located at Bottom ground layer (sd2), intermediate grounded layer (sd3)
Between 90 degree of coupled mode phase shifters (2)；
Close to 180 degree balun (1) and far from the side of 90 degree of coupled mode phase shifters (2), first input port (Input is set
Port), the first output port (Output port 1)；Close to 90 degree of coupled mode phase shifters (2) and far from 180 degree balun (1)
Second output terminal mouth (Output port 2) is arranged in side；180 degree balun (1), 90 degree of common sides of coupled mode phase shifter are set
It postpones and flanks ground terminal (GND1), common other side setting front side ground terminal (GND2)；
The 180 degree balun (1) includes being set between intermediate grounded layer (sd3) and top ground plane (sd1) and being parallel to connect
The balun first segment coupling line on stratum, is set between Bottom ground layer (sd2) and intermediate grounded layer (sd3) and is parallel to ground connection
The balun second segment coupling line of layer；The balun first segment coupling line includes balun first segment lower layer coupling line (BLla), and
Balun first segment upper layer coupling line (BL1b) that is in parallel and opposite and constituting coupling；Balun second segment coupling line includes balun
Second segment lower layer coupling line (BL2a) and balun second segment upper layer coupling line that is in parallel and opposite and constituting coupling
(BL2b)；Balun first segment lower layer coupling line (BLla) is parallel with balun second segment upper layer coupling line (BL2b) opposite；
90 degree of coupled mode phase shifters (2) include being set between Bottom ground layer (sd2) and intermediate grounded layer (sd3) and putting down
Row is in the phase shifter coupling line of ground plane comprising phase shifter upper layer coupling line (Cpl1), the phase shifter lower layer coupling being parallel to each other
Zygonema (Cpl2)；
The first input port (Input port) passes through input port connecting line (L1) and balun first segment lower layer coupling line
(BLla) one end is connected, and the other end of balun first segment lower layer coupling line (BLla) passes through through intermediate grounded layer (sd3)
Second binding post (H2) is connected with balun second segment upper layer coupling line (BL2b)；The one of balun first segment upper layer coupling line (BL1b)
End passes through the first binding post (H1), the first output by the first ground line (Ld1) connection rear side ground terminal (GND1), the other end
Port connecting line (L2) is connected with the first output port (Output port 1)；Balun second segment lower layer coupling line (BL2a)
One end is connected by the second ground line (Ld2) connection rear side ground terminal (GND1), the other end by third binding post (H3), the 4th
Wiring (L4) is connected with one end of phase shifter lower layer coupling line (Cpl2), and the other end of phase shifter lower layer coupling line (Cpl2) passes through
4th ground line (Ld4) connection front side ground terminal (GND2)；One end of phase shifter upper layer coupling line (Cpl1) is grounded by third
Line (Ld3) connection front side ground terminal (GND2), the other end pass through second output terminal mouth connecting line (L3) and second output terminal mouth
(Output port 2) is connected.
2. 90 degree of tri- port 3dB according to claim 1 plane electric bridge, which is characterized in that the 180 degree balun (1) is adopted
With broadside coupled Manchand balun, 90 degree of coupled mode phase shifters (2) use 90 degree of directional coupled phase shifters.
3. 90 degree of tri- port 3dB according to claim 1 or 2 plane electric bridge, which is characterized in that the input port connection
Line (L1) is connected by first input port connecting plate (C1) with one end of balun first segment lower layer coupling line (BLla)；First is defeated
Exit port connecting line (L2) is connected by the first output port connecting plate (C2) with the first output port (Output port 1)；
One end that 4th connecting line (L4) passes through the 4th connecting plate (C4), the 5th connecting plate (C5) and phase shifter lower layer coupling line (Cpl2)
It is connected；One end of phase shifter upper layer coupling line (Cpl1) is connect by second output terminal mouth connecting plate (C3) with second output terminal mouth
Line (L3) is connected.
4. 90 degree of tri- port 3dB according to claim 3 plane electric bridge, which is characterized in that balun first segment lower layer
Coupling line (BLla) forms half-wavelength with balun second segment upper layer coupling line (BL2b) and couples.
5. 90 degree of tri- port 3dB according to claim 4 plane electric bridge, which is characterized in that balun first segment upper layer
Coupling line (BL1b), balun first segment lower layer coupling line (BL1a), balun second segment upper layer coupling line (BL2b), balun second segment
Lower layer's coupling line (BL2a), phase shifter upper layer coupling line (Cpl1), phase shifter lower layer coupling line (Cpl2) are quarter-wave
Long coupling line.
6. 90 degree of tri- port 3dB according to claim 5 plane electric bridge, which is characterized in that the first input port
The feature resistance of (Input port), the first output port (Output port 1), second output terminal mouth (Output port 2)
Anti- is 50 ohm.
7. 90 degree of tri- port 3dB according to claim 6 plane electric bridge, which is characterized in that the first input port
(Input port), the first output port (Output port 1), second output terminal mouth (Output port 2), front side ground connection
It holds (GND2), rear side ground terminal (GND1), top ground plane (sd1), Bottom ground layer (sd2), intermediate grounded layer (sd3), defeated
Inbound port connecting line (L1), first input port connecting plate (C1), the first output port connecting plate (C2), second output terminal mouth connect
Fishplate bar (C3), the first output port connecting line (L2), second output terminal mouth connecting line (L3), balun first segment upper layer coupling line
(BL1b), balun first segment lower layer coupling line (BL1a), balun second segment upper layer coupling line (BL2b), balun second segment lower layer coupling
Zygonema (BL2a), the 4th connecting line (L4), the 4th connecting plate (C4), the 5th connecting plate (C5), phase shifter upper layer coupling line
(Cpl1), phase shifter lower layer coupling line (Cpl2), the first ground line (Ld1), the second ground line (Ld2), third ground line
(Ld3), the 4th ground line (Ld4), the first binding post (H1), the second binding post (H2), third binding post (H3) pass through low temperature
Common burning porcelain (LTCC) technology is realized.
8. 90 degree of tri- port 3dB according to claim 7 plane electric bridge, which is characterized in that balun first segment upper layer
Coupling line (BL1b), balun first segment lower layer coupling line (BL1a), balun second segment upper layer coupling line (BL2b), balun second segment
Lower layer's coupling line (BL2a) is helix structure.
9. 90 degree of tri- port 3dB according to claim 7 plane electric bridge, which is characterized in that the phase shifter upper layer coupling
Line (Cpl1), phase shifter lower layer coupling line (Cpl2) are snakelike meander line structure.
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Cited By (4)
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| CN111029686A (en) * | 2019-12-16 | 2020-04-17 | 南京航空航天大学 | Single-circuit double-bit phase shifter |
| CN111029692A (en) * | 2019-11-25 | 2020-04-17 | 南京理工大学 | Novel absorption formula band pass filter based on LTCC |
| CN111029693A (en) * | 2019-11-25 | 2020-04-17 | 南京理工大学 | S-band reflection-free band-pass filter |
| CN113097682A (en) * | 2021-04-29 | 2021-07-09 | 中国电子科技集团公司第四十三研究所 | Miniature multilayer ceramic 3dB electric bridge |
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| YONGSHENG DAI 等: "A LTCC Miniaturized Broadband Modified Marchand Balun", 《2012 INTERNATIONAL SYMPOSIUM ON COMMUNICATIONS AND INFORMATION TECHNOLOGIES》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029692A (en) * | 2019-11-25 | 2020-04-17 | 南京理工大学 | Novel absorption formula band pass filter based on LTCC |
| CN111029693A (en) * | 2019-11-25 | 2020-04-17 | 南京理工大学 | S-band reflection-free band-pass filter |
| CN111029686A (en) * | 2019-12-16 | 2020-04-17 | 南京航空航天大学 | Single-circuit double-bit phase shifter |
| CN113097682A (en) * | 2021-04-29 | 2021-07-09 | 中国电子科技集团公司第四十三研究所 | Miniature multilayer ceramic 3dB electric bridge |
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