CN206134906U - Miniaturized 3dB directional coupler - Google Patents
Miniaturized 3dB directional coupler Download PDFInfo
- Publication number
- CN206134906U CN206134906U CN201621140525.6U CN201621140525U CN206134906U CN 206134906 U CN206134906 U CN 206134906U CN 201621140525 U CN201621140525 U CN 201621140525U CN 206134906 U CN206134906 U CN 206134906U
- Authority
- CN
- China
- Prior art keywords
- parallel arm
- transmission line
- microstrip line
- fan
- minor matters
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a miniaturized 3dB directional coupler, including two first transmission lines and second transmission line that the symmetry is parallel, first transmission line both ends are connected with the first microstrip line and second microstrip line of symmetry respectively, second transmission line both ends are connected with the third microstrip line and fourth microstrip line of symmetry respectively, first microstrip line port is signal input part, second microstrip line port is signal output part, third microstrip line port is the coupling end, fourth microstrip line port is held for keeping apart, characterized by, first transmission line with the first parallel arm of inwards buckling and second parallel arm of connecting two symmetries between the second transmission line, the first fan -shaped minor matters and the fan -shaped minor matters of second that inwards are equipped with the symmetry are put with second parallel arm central point to first parallel arm. Have and compensate phase place, integration processing, avoid coupling, power distribution accuracy and the high characteristics of output phase precision, can reach better electric property.
Description
Technical field
This utility model is related to a kind of directional coupler, belongs to microwave technical field.
Background technology
In microwave regime, directional coupler is a kind of broad-spectrum four port devices, electronic countermeasure, communication system,
It is indispensable in radar system and surveying instrument.Its main uses has synthesis and distribution power, expands power range, prison
Depending on power and frequency spectrum, reflection coefficient is measured by directional coupler and constitutes balanced mixer and impedance measuring bridge etc..Tradition
The size of directional coupler receives theoretic restriction, can reach the quarter-wave size in dielectric material, therefore low
Frequency range size can be required than larger to board dimension, is unfavorable for integrated.One United States Patent (USP) US5191349《Apparatus
and Method for an Amplitude Monopulse Directional Antenna》In it is small-sized to directional coupler
Change the method that actual capacitance is added using bending microstrip line, the precision of power distribution is not high, exports the power error of two-port also
It is, than larger, to need to add electric capacity, increased loss, reality processing also needs to adjustment, the self-resonant frequency of actual capacitance itself
Also to consider, be not necessarily institute's target value.
The content of the invention
Technical problem to be solved in the utility model be to provide it is a kind of can compensate phase place and integration processing it is little
Type 3dB directional coupler；A kind of longitudinally wide little, small volume miniaturization 3dB directional couplers are further provided；Enter one
A kind of miniaturization 3dB directional couplers for being avoided that coupling of offer of step, further providing one kind can improve power distribution
Precision, output phase precision, can reach the miniaturization 3dB directional couplers of preferable electric property.
To solve above-mentioned technical problem, the technical solution adopted in the utility model is：
A kind of miniaturization 3dB directional couplers, including two symmetrical parallel the first transmission lines and the second transmission line, it is described
First transmission line two ends are connected to symmetrical the first microstrip line and the second microstrip line, and the second transmission line two ends connect respectively
It is connected to symmetrical the 3rd microstrip line and the 4th microstrip line, the first microstrip line port is signal input part, second micro-strip
Line end mouth is signal output part, and the 3rd microstrip line port is coupled end, and the 4th microstrip line port is isolation end, described
Connect two symmetrical the first parallel arms for bending inwards and the second parallel arm between first transmission line and second transmission line,
The fan-shaped minor matters of symmetrical first are provided inwardly with first parallel arm and the second parallel arm center with the second fan-shaped minor matters.
First parallel arm and the second parallel arm are bent inwardly to " several " shape.
The electrical length of the parallel arm for bending inwards is defined as to bend depth, first parallel arm and the second parallel arm
Bending depth is 5～8mm, and live width is 0.5～0.56mm, first transmission line and the second transmission line live width for 1.08～
1.35mm。
The bending depth of described and the first parallel arm and the second parallel arm is 7.6mm, and live width is 0.5mm, and described first passes
Defeated line and the second transmission line live width are 1.3mm.
Described first fan-shaped minor matters are 1～3.5mm with the radius of the second fan-shaped minor matters, and central angle is 18 °～36 °.
Described first fan-shaped minor matters are 3mm with the radius of the second fan-shaped minor matters, and central angle is 24 °.
The beneficial effect that this utility model is reached：
The 1st, the phase place that can be used for compensating bending parallel arm is set using fan-shaped minor matters, moreover it is possible to which solving bending parallel arm may be because
It is the problem of the too near coupling of distance, and can be with integration processing, simple structure, it is not necessary to actual capacitance is added, reduces loss,
Also need not consider to add self-resonant frequency caused by actual capacitance, only by microstrip line form identical work(can be just realized
Energy.
2nd, the setting of " several " shape is curved using two parallel arms, the longitudinal size of 3dB directional couplers can be reduced, it is real
Existing miniaturization, with the further miniaturization of size, return loss S11 designed in frequency band can be deteriorated therewith, with S11 less than-
14dB or so is defined, correspondence standing-wave ratio below 1.5, it is minimum under this index can be compact in size to 28% by one direction.
3rd, the bending depth of two parallel arms is further limited, can avoid bend depth it is too short be unfavorable for miniaturization mend
Phase place is repaid, it is long, two parallel arm distances can be caused too near, there is coupling.The original micro-strip line impedance of parallel arm is theoretically
50 ohm, transmission line is 35.35 ohm, after bending microstrip line compensation phase place, according to electrical lengthWherein f
It is mid frequency, the inductance and capacitance characteristic of L microstrip lines corresponding with C, bending microstrip line realizes miniaturization, but LC product meetings
Diminish therewith, that is, the resonance point of microstrip line can be less than normal, needs to retract this center frequency points, can be by adjusting transmission line
With the live width of parallel arm, the live width difference of two microstrip lines is bigger in actual design, and effect is better after combination.
4th, to the further restriction of fan-shaped minor matters size, phase accuracy and power distribution precision can be improved, wherein fan-shaped
Minor matters radius will be with reference to the bending depth of two parallel arms and reality processing, and general bending depth is less, fan-shaped minor matters radius
Less, fan-shaped minor matters central angle is less, better for power distribution precision, it is also contemplated that size is facilitated implementation in actual design.
Description of the drawings
Fig. 1 is the circuit diagram of 3dB directional couplers of the present utility model；
Fig. 2 is this utility model signal input port return loss S (1,1) simulation result figure；
Fig. 3 is the insertion loss S (2,1) and S (3,1) simulation result figure of this utility model output port；
Fig. 4 is the corresponding phase shift simulation result figure of S (2,1) and S (3,1) of this utility model coupled end；
Fig. 5 is S (4,1) the simulation result figure corresponding to the slotting isolation of this utility model isolation end；
Fig. 6 is this utility model standing-wave ratio VSWR simulation result figure.
Specific embodiment
This utility model is further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating this
The technical scheme of utility model, and protection domain of the present utility model can not be limited with this.
A kind of miniaturization 3dB directional couplers as shown in Figure 1, including two the first symmetrical parallel transmission line TL7With
Two transmission line TL8, the first transmission line TL7Two ends are connected to the first symmetrical microstrip line TL1With the second microstrip line TL2, institute
State the second transmission line TL8Two ends are connected to the 3rd symmetrical microstrip line TL3With the 4th microstrip line TL4, first microstrip line
TL1Port be signal input part 1, the second microstrip line port TL2For signal output part 2, the 3rd microstrip line port TL3For
Coupled end 3, the 4th microstrip line port TL4For isolation end 4, the first transmission line TL7With the second transmission line TL8Between
Two symmetrical the first parallel arm T for bending inwards of connectionL5With the second parallel arm TL6, the first parallel arm TL5With second simultaneously
Joint arm TL6Fan-shaped minor matters T of symmetrical first are provided inwardly with centerL9With the second fan-shaped minor matters TL10, the described first fan-shaped branch
Section TL9With the second fan-shaped minor matters TL10Can be used to compensate the first parallel arm T for bending inwardsL5With the second parallel arm TL6Phase place, and
And can be with integration processing, the first parallel arm TL5With the second parallel arm TL6It is bent inwardly to " several " shape, it is described and first simultaneously
Joint arm TL5With the second parallel arm TL6Bending depth be 5～8mm, bending depth less than 5mm be then unfavorable for miniaturization compensation phase
Position, higher than 8mm the first parallel arm T can be then causedL5With the second parallel arm TL6Distance is too near, coupling occurs.It is described and first in parallel
Arm TL5With the second parallel arm TL6Live width be 0.5～0.56mm, the first transmission line TL7With the second transmission line TL8Live width
For 1.08～1.35mm, according to electrical lengthReduce described and the first parallel arm TL5With the second parallel arm TL6
Size, in addition it is also necessary to adjust the first parallel arm TL5With the second parallel arm TL6Live width and the first transmission line TL7With described second
Transmission line TL8Live width, the live width difference of two microstrip lines is bigger, and effect is better after combination.Described first fan-shaped minor matters TL9
With the second fan-shaped minor matters TL10Radius be 1～3.5mm, central angle is 18 °～36 °, first fan-shaped minor matters TL9With the second fan
Shape minor matters TL10The radius of minor matters will be with reference to the first parallel arm TL5With the second parallel arm TL6Bending depth and reality processing, bending
Depth is less, the described first fan-shaped minor matters TL9With the second fan-shaped minor matters TL10The radius of minor matters is also less, the described first fan-shaped minor matters
TL9With the second fan-shaped minor matters TL10The central angle of minor matters is less, better for power distribution precision, it is also contemplated that chi in actual design
Very little to facilitate implementation, this utility model is defined by return loss S11 less than -14dB or so, and correspondence standing-wave ratio is below 1.5, this index
Under the minimum single side size miniaturization that can reach to full-sized 28%.
This utility model optimal technical scheme is the first parallel arm TL5With the second parallel arm TL6Bending depth be 7.6mm,
Live width is 0.5mm, the first transmission line TL7With the second transmission line TL8Live width is 1.3mm.Described first fan-shaped minor matters TL9With
Two fan-shaped minor matters TL10Radius be 3mm, central angle be 24 °, it is possible to achieve single side size miniaturization to full-sized 38% is left
It is right.
With reference to Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, it can be seen that in the range of bandwidth 1.03gHz to 1.09gHz, this practicality is new
The return loss of the 3dB directional couplers signal input part 1 of type design is less than -18dB, and the isolation of isolation end 4 is higher than 21dB,
Signal output part 2 and the power distribution of coupled end 3 are balanced, in the range of the upper and lower 0.1dB of -3.15dB, two port phase differences
90 °, phase accuracy is maintained within 1 °, and standing-wave ratio is less than 1.35, balanced with power distribution, the characteristics of high precision.
The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from this utility model know-why, some improvement and deformation can also be made, these change
Enter and deform also to should be regarded as protection domain of the present utility model.
Claims (6)
1. a kind of miniaturization 3dB directional couplers, including two the first symmetrical parallel transmission line (TL7) and the second transmission line
(TL8), the first transmission line (TL7) two ends are connected to the first symmetrical microstrip line (TL1) and the second microstrip line (TL2), institute
State the second transmission line (TL8) two ends are connected to the 3rd symmetrical microstrip line (TL3) and the 4th microstrip line (TL4), described first
Microstrip line（TL1）Port is signal input part（1）, the second microstrip line port（TL2）For signal output part（2）, the described 3rd
Microstrip line port（TL3）For coupled end（3）, the 4th microstrip line port（TL4）For isolation end（4）, it is characterized in that, described
One transmission line (TL7) with the second transmission line (TL8) between connect two symmetrical the first parallel arm (T for bending inwardsL5) with
Second parallel arm (TL6), the first parallel arm (TL5) and the second parallel arm (TL6) symmetrical is provided inwardly with center
One fan-shaped minor matters (TL9）Minor matters (T fan-shaped with secondL10）.
2. a kind of miniaturization 3dB directional couplers according to claim 1, is characterized in that, the first parallel arm (TL5)
With the second parallel arm (TL6) it is bent inwardly to " several " shape.
3. a kind of miniaturization 3dB directional couplers according to claim 1, is characterized in that, the first parallel arm (TL5)
With the second parallel arm (TL6) bending depth be 5～8mm, live width be 0.5～0.56mm, the first transmission line (TL7) and the
Two transmission line (TL8) live width be 1.08～1.35mm.
4. a kind of miniaturization 3dB directional couplers according to claim 1, is characterized in that, the first parallel arm (TL5)
With the second parallel arm (TL6) bending depth be 7.6mm, live width is 0.5mm, the first transmission line (TL7) and the second transmission line
(TL8) live width be 1.3mm.
5. a kind of miniaturization 3dB directional couplers according to any one of claim 1-4, is characterized in that, first fan
Shape minor matters (TL9）Minor matters (T fan-shaped with secondL10）Radius be 1～3.5mm, central angle be 18 °～36 °.
6. a kind of miniaturization 3dB directional couplers according to claim 5, is characterized in that, the described first fan-shaped minor matters
(TL9）Minor matters (T fan-shaped with secondL10）Radius be 3mm, central angle be 24 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621140525.6U CN206134906U (en) | 2016-10-20 | 2016-10-20 | Miniaturized 3dB directional coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621140525.6U CN206134906U (en) | 2016-10-20 | 2016-10-20 | Miniaturized 3dB directional coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206134906U true CN206134906U (en) | 2017-04-26 |
Family
ID=58574712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621140525.6U Expired - Fee Related CN206134906U (en) | 2016-10-20 | 2016-10-20 | Miniaturized 3dB directional coupler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206134906U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134175A (en) * | 2017-12-11 | 2018-06-08 | 南京理工大学 | A kind of miniaturization orthogonal wideband electric bridge |
| WO2019029126A1 (en) * | 2017-08-09 | 2019-02-14 | 深圳市景程信息科技有限公司 | Graphene-based coupler with adjustable broadband power distribution ratio |
| CN109687081A (en) * | 2018-12-13 | 2019-04-26 | 南京理工大学 | Novel 3dB180 degree plane electric bridge based on LTCC |
| CN111193088A (en) * | 2018-11-14 | 2020-05-22 | 南宁富桂精密工业有限公司 | Branch line coupler |
| CN111261990A (en) * | 2020-01-16 | 2020-06-09 | 东方红卫星移动通信有限公司 | Complementary reconfigurable power divider based on reflection-type phase shifter |
| CN114094298A (en) * | 2021-11-05 | 2022-02-25 | 中国航空工业集团公司雷华电子技术研究所 | Microstrip branch bridge |
| CN114444429A (en) * | 2021-12-22 | 2022-05-06 | 北京无线电测量研究所 | Chip filter manufacturing method and system |
| CN115347342A (en) * | 2021-05-12 | 2022-11-15 | 南宁富联富桂精密工业有限公司 | Branch coupler |
| US11870125B2 (en) | 2021-05-12 | 2024-01-09 | Nanning Fulian Fugui Precision Industrial Co., Ltd. | Branch-line coupler |
-
2016
- 2016-10-20 CN CN201621140525.6U patent/CN206134906U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019029126A1 (en) * | 2017-08-09 | 2019-02-14 | 深圳市景程信息科技有限公司 | Graphene-based coupler with adjustable broadband power distribution ratio |
| CN108134175A (en) * | 2017-12-11 | 2018-06-08 | 南京理工大学 | A kind of miniaturization orthogonal wideband electric bridge |
| CN111193088A (en) * | 2018-11-14 | 2020-05-22 | 南宁富桂精密工业有限公司 | Branch line coupler |
| CN111193088B (en) * | 2018-11-14 | 2021-12-21 | 南宁富桂精密工业有限公司 | Branch line coupler |
| CN109687081A (en) * | 2018-12-13 | 2019-04-26 | 南京理工大学 | Novel 3dB180 degree plane electric bridge based on LTCC |
| CN111261990A (en) * | 2020-01-16 | 2020-06-09 | 东方红卫星移动通信有限公司 | Complementary reconfigurable power divider based on reflection-type phase shifter |
| CN115347342A (en) * | 2021-05-12 | 2022-11-15 | 南宁富联富桂精密工业有限公司 | Branch coupler |
| US11870125B2 (en) | 2021-05-12 | 2024-01-09 | Nanning Fulian Fugui Precision Industrial Co., Ltd. | Branch-line coupler |
| CN114094298A (en) * | 2021-11-05 | 2022-02-25 | 中国航空工业集团公司雷华电子技术研究所 | Microstrip branch bridge |
| CN114444429A (en) * | 2021-12-22 | 2022-05-06 | 北京无线电测量研究所 | Chip filter manufacturing method and system |
| CN114444429B (en) * | 2021-12-22 | 2023-09-01 | 北京无线电测量研究所 | Chip filter manufacturing method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206134906U (en) | Miniaturized 3dB directional coupler | |
| EP2109180B1 (en) | A directional coupler and a receiving or transmitting device | |
| US7443263B2 (en) | Wide-bandwidth balanced transformer | |
| TWI700858B (en) | Branch-line coupler | |
| KR101061873B1 (en) | Design Method of Microstrip Directional Coupler | |
| CN109687081A (en) | Novel 3dB180 degree plane electric bridge based on LTCC | |
| CN108470968B (en) | Termination equal complex impedance crossing directional coupler | |
| CN103022616A (en) | Double-frequency four-way power divider based on low temperature co-fired ceramic technology | |
| CN104993205A (en) | Microstrip fold line directional coupler | |
| CN110247145B (en) | Bandwidth-adjustable broadband filtering balun with in-band good matching and isolation | |
| TWI703819B (en) | Dual-band transformer structure | |
| WO2001056108A9 (en) | Balun formed from symmetrical couplers and method for making same | |
| CN108346845A (en) | A kind of ultra-wideband high power miniaturization power splitter | |
| CN210006879U (en) | Miniaturized broadband coupler of thin film integration technology | |
| US8587388B2 (en) | Multi-section velocity compensated microstrip directional coupler | |
| CN201638921U (en) | Asymmetric coplanar waveguide directional coupler | |
| CN208570879U (en) | X-band large size mixing plane circuit power splitter | |
| US8314664B2 (en) | Microstrip technology hyperfrequency signal coupler | |
| CN208806350U (en) | A kind of pulse combiner | |
| US9966646B1 (en) | Coupler with lumped components | |
| CN111786067A (en) | Broadband directional coupling circuit structure suitable for radio frequency front end | |
| CN216488454U (en) | Coupler and coupling circuit and communication equipment thereof | |
| CN214797681U (en) | Dual-band Wilkinson power divider with dual-coupling line and open-circuit line structure | |
| CN212626002U (en) | Broadband directional coupling circuit structure suitable for radio frequency front end | |
| CN212257645U (en) | Embedded multimode coupler, radio frequency module and communication equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170426 Termination date: 20181020 |