CN110492214A - The power splitters such as square coaxial transmission line Terahertz - Google Patents
The power splitters such as square coaxial transmission line Terahertz Download PDFInfo
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- CN110492214A CN110492214A CN201910704717.7A CN201910704717A CN110492214A CN 110492214 A CN110492214 A CN 110492214A CN 201910704717 A CN201910704717 A CN 201910704717A CN 110492214 A CN110492214 A CN 110492214A
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- transmission line
- coaxial transmission
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- junction
- branch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
Abstract
The power splitters such as a kind of side's coaxial transmission line Terahertz disclosed by the invention, it is desirable to provide a kind of with low transmission loss, high isolation, power splitter.The technical scheme is that: common end side's coaxial transmission line passes through the public port channel of Terahertz power splitter, the coaxial T junction in the side of being vertically connected, the coaxial T junction two-way vertical branch transmission line in side forward passes through the connected branch side's coaxial transmission line of the match party coaxial transmission line of λ/4, and the side's of damaging coaxial transmission line by intersecting vertically in the coaxial T junction in branch side's coaxial transmission line coupled end side extends to function point port and constitutes power divider circuit；Signal is inputted by common end side's coaxial transmission line, in side, coaxial T junction moderate range function is divided into two-way, two-way branch signal is along after the match party coaxial transmission line impedance matching of λ/4, it is fed into full symmetric, the coaxial T junction in the identical coupled end side of potential exports two half-power signals by two support arms of branch-waveguide side's coaxial transmission line.
Description
Technical field
The equal power splitters for the signal power distribution that Terahertz system is mainly used in the present invention relates to a kind of.
Background technique
Power splitter is widely used in the field of wireless communication as a kind of microwave passive component, but with making
The requirement that user minimizes power splitter performance indicator and structure size is higher and higher, and traditional power splitter working frequency is low,
It is not able to satisfy user to the use demand of higher frequency.The most basic component of any communication network first is that allow signal send
There are many type to multiple users and the power divider (power splitter) of equipment, there is equal function point, function point (the not equal part power point such as not
Orchestration), the diversified forms such as three function point.The distribution and synthesis of power splitter being mainly used for realizing to a few roads of signal or multichannel, etc.
Power splitter is circuit most-often used in power splitter.The power splitters such as Terahertz are the basic equipments used in Terahertz network,
As the Primary Component of Terahertz channel, it is Terahertz application system that THz wave power splitter, which is a kind of important function element,
In indispensable component part, be widely used in the Terahertz system of various workbenches.The power splitters such as Terahertz are main
For terahertz signal power synthesis circuit, distributed air-defense circuit and terahertz antenna feeding network etc..Existing THz wave
Mostly there is structure is complicated, function component efficiency is low, the shortcomings such as at high cost for power splitter.
The power splitters such as traditional Terahertz are machined frequently with rectangular waveguide or microstrip circuit is realized, and with work frequency
The raising of rate, rectangular waveguide is smaller, and the tolerance that existing machinery machining accuracy is usually unable to satisfy Terahertz circuit design is wanted
It asks.And the isolation at function point end 7 cannot be provided based on rectangular waveguide Terahertz power splitter, when the load that function point end 7 connects is in the presence of certain
When mismatch, the electric property of the meeting entire circuit of severe exacerbation.The Terahertz power splitter processed using microstrip circuit, due to microstrip line
For opening structure, and two branch circuit must gather it is close could be connected with isolation resistance, i.e. gap very little between two branches,
But it can cause to export the close coupling between two branches so again, destroy desired function point ratio.If increasing gap, i.e., to lengthen electricity
The size and branch circuit of resistance, branch circuit is elongated, and the working frequency of power splitter will reduce, cause power splitter can not work to
Terahertz frequency range.
Transmission line be to guide energy (electromagnetic energy, luminous energy, thermal energy even voice, image, data information) from one
It is transmitted to a kind of device at another place.The transmission line form for working in Terahertz frequency range mainly has rectangular waveguide, microstrip transmission line
With complanar line etc..Circle coaxial line typically operates in 0.1THz hereinafter, frequency is lifted up again, the internal diameter of circle coaxial transmission line and outer
Diameter become very into small, it is difficult to processing realization.And metal sputtering technique and silicon substrate photoetching process based on silicon base chip, design
Coaxial transmission line inner conductor and external conductor are square, and form Terahertz side's coaxial transmission line is implemented as possibility, are led to
Cross the processing and manufacturing of the photoetching side of may be implemented coaxial transmission line repeatedly.Based on square coaxial transmission line development Terahertz power splitter electricity
Road becomes a kind of feasible scheme.Square coaxial transmission line outer wall is metallic conductor, is enclosed construction, two adjacent branch circuits
There is no Space Couplings, avoid the crosstalk of two-way function sub-signal.Square coaxial inner is filled with air dielectric, and transmission loss is low,
But the low-loss design of existing Terahertz power splitter.The side's of damaging coaxial transmission is processed based on limited conductor material (such as tantalum nitride)
The true impedance design of Terahertz may be implemented in line, based on the Terahertz isolation resistance of this design, realizes the isolation of Terahertz power splitter
The realization of resistance.
Summary of the invention
The purpose of the present invention is in view of the shortcomings of the prior art place, it is desirable to provide one kind have low transmission loss,
High isolation, higher cutoff frequency, suitable for Terahertz integrated chip, the power splitters such as the Terahertz based on square coaxial transmission line.
Above-mentioned purpose of the invention can realize by following measures, a kind of function point such as side's coaxial transmission line Terahertz
Device, comprising: square coaxial transmission line and Terahertz power splitter with the coaxial internal and external conductor in side, it is characterised in that: common end side is same
Axis transmission line 1 passes through the public port 8 of Terahertz power splitter, vertically connects the coaxial T in side being built in power splitter rectangular cavities
Type knot 2, it is coaxial that the coaxial 2 two-way vertical branch transmission line of T junction in side forward passes through the match party of λ/4 being connected on upper/lower terminal point
Transmission line 3 is connected coupled end T junction 4, while forward connecting two branch side's coaxial transmission lines 6 by coupled end T junction 4, and two points
Branch side's coaxial transmission line 6 is intersected vertically the side's of damage coaxial transmission line 5 by upper and lower coupled end T junction 4, extends to two branch ends
The function point end 7 of mouth, exports half-power signal.
The present invention has the advantages that compared with the prior art.
It is lost with low transmission.The present invention is using full symmetric at the coaxial T junction in coupled end side, the identical two-way letter of potential
Number, without transmission in the side's of damaging coaxial transmission line 5, do not increase transmission loss.And square coaxial inner is filled with air dielectric, believes
It number is transmitted between square coaxial transmission line inner wall and outer wall, the side that the metal surface of quilt and outer wall is transmitted including this surface current
Formula, compared with traditional microstrip line, square coaxial transmission line is almost without dielectric loss, therefore the square coaxial transmission line ratio of equal length
Lossy microstrip transmission is lower, and function component efficiency is higher.
With high isolation, higher cutoff frequency.Input signal of the present invention is by common end side's coaxial feed, by first side
Coaxial T junction is divided into two-way, this two paths of signals passes through one section of match party coaxial transmission line impedence of λ/4 vertically bent respectively again
Match, then pass through a coaxial T junction in side respectively, 7 sides coaxially export respectively at function point end.Since two-way function sub-signal is damaging
The path that side passes by coaxial two sides is identical, so potential is identical, then function sub-signal is in the side of damaging is coaxial without transmission.And when function point
When holding 7 one termination mismatched load, signal is inputted from top set side coaxial 6, the signal Ae of inputjθA is amplitude, θ is that phase can be
The medium function of upper coupled end T junction 4 is divided into two paths of signalsTwo paths of signals constant amplitude in lower coupled end T junction 4 is reversely offset,
Signal is in branch-waveguide side's coaxial transmission line 6 without output, signal isolation of the realization side with shaft work point end 7.And square coaxial biography
It the cutoff frequency of defeated line and the coaxial inside and outside wall side length in side and is inversely proportional.The transmission mode of square coaxial transmission line is TEM mould, is had non-
Constant width bandwidth of operation and high cutoff frequency.
The coaxial isolation in power splitter side of the present invention is provided by damage side's coaxial transmission line, and the function of the grade power splitters divides port 7
Between isolation by the side's of damaging coaxial transmission line characteristic impedance and internal conductor material resistivity codetermine.2 equal function point
The isolation at device end can adjust isolation by adjusting the length of square coaxial inner wall side length and the resistivity of internal conductor material.It can also
With the isolation of the resistivity design power splitter of characteristic impedance and inner wall conductor by adjusting the side's of damaging coaxial transmission line.Due to
Damage side's coaxial transmission line inner wall conductor uses limited conducting material (such as tantalum nitride) sputter, when TEM electromagnetic wave is in inner wall conductor shape
Ohmic loss, the real part of increase side's coaxial inner TEM electromagnetic transmission coefficient are generated when at surface current, so that the side of decaying is coaxial
Internal TEM electromagnetic wave realizes power splitter isolation.Theoretical and simulation result shows that input terminal matching is good, and two outputs
Realize isolation in end.Simulation result and notional result trend are coincide, and the feasibility of this method is demonstrated.
It is with good expansibility.The present invention is identical using the coaxial outer wall side length in the side of each built-up circuit of power splitter
And central coaxial, have convenient for multiple equal cascade characteristics of power splitters, can be expanded by cascade and realize 2nMultichannel function point, have
Good multichannel expansion.In the case where square coaxial inner wall side length and constant outer wall side length ratio, reduce inner and outer wall side
The working frequency of power splitter can be improved in long sum.
Structure is simple.The present invention is identical using the coaxial outer wall conductor outer dimension in power splitter side, leads by adjusting inner wall
The characteristic impedance of the outer dimension change side coaxial circuit of body, realization side's coaxial nature impedance design, and realization easy to process.It is public
Total end side coaxial transmission line 1 divides the match party of λ/4 coaxial transmission line 3 by the coaxial connection of T junction 2 in side, passes through upper and lower branch coax
Defeated line connects coupled end T junction 4, and is crossed to form the closed loop being parallel to each other with the side's of damaging coaxial transmission line 5；The knot of power splitter
Configuration formula is simple, and size is small, at low cost, it is easy to accomplish.The coaxial outer wall side length in the side of each built-up circuit of power splitter it is identical and
Central coaxial, design is convenient, without debugging, and has adjustability.The working frequency of the equal power splitters can be by adjusting λ/4
It is formulated the length of transmission line of coaxial transmission line 3, changes power splitter working frequency.Length shortens, and working frequency rises；Length becomes
It is long, working frequency decline.
Detailed description of the invention
Fig. 1 is the organigram of the power splitters such as present invention side's coaxial transmission line Terahertz.
Fig. 2 is the schematic block circuit diagram of Fig. 1.
In figure: 1 common end side's coaxial transmission line, the coaxial T junction of 2 sides, the match party coaxial transmission line of 3 λ/4,4, coupled end side
Coaxial T junction, 5 side's of damaging coaxial transmission lines, 6 branch side's coaxial transmission lines, 7 function point end, 8 public ports.
The present invention will be further explained below with reference to the attached drawings.
Specific embodiment
Refering to fig. 1, Fig. 2.In preferred embodiment described below, a kind of power splitters such as side's coaxial transmission line Terahertz,
It include: square coaxial transmission line and Terahertz power splitter with the coaxial internal and external conductor in side, it is characterised in that: common end side coaxially passes
Defeated line 1 passes through the public port 8 of Terahertz power splitter, vertically connects the coaxial T junction in side being built in power splitter rectangular cavities
2, the coaxial 2 two-way vertical branch transmission line of T junction in side forward passes through the match party coaxial transmission of λ/4 being connected on upper/lower terminal point
Line 3 is connected coupled end T junction 4, while forward connecting two branch side's coaxial transmission lines 6, two branch sides by coupled end T junction 4
Coaxial transmission line 6 is intersected vertically the side's of damage coaxial transmission line 5 by upper and lower coupled end T junction 4, extends to two branch ports
Function point end 7, output power signal.Terahertz signal is inputted by common end side's coaxial transmission line 1, and in side, coaxial T junction 2 is medium
Amplitude function is divided into two-way, and two-way branch signal is full symmetric along being fed into after 3 impedance matching of the match party of λ/4 coaxial transmission line,
The identical coupled end T junction 4 of potential exports two half-power signals by 6 two support arms of branch-waveguide side's coaxial transmission line.
In an alternative embodiment, the characteristic impedance of common end side's coaxial transmission line 1, branch side's coaxial transmission line 6 is 50 Ω,
The characteristic impedance of the 2 sections of match party of λ/4 coaxial transmission lines 3 is about 70 Ω, and the characteristic impedance of the side's of damaging coaxial transmission line 6 is about 100
Ω。
Preferably the inner wall conductor of the side's of damaging coaxial transmission line 5 is limited conductor material, and the limited conductor material is nitrogen
Change tantalum, and the inner wall conductor of other circuits is good conductor.It is led by adjusting the characteristic impedance and inner wall of the side's of damaging coaxial transmission line 5
The resistivity of body can design the isolation of power splitter.
Common end side's coaxial transmission line 1 terminates the two sections of match party of λ/4 coaxial transmission lines 3 by the coaxial T junction 2 in side, through too
The branch coax cavity up and down of the power splitter of hertz connects coupled end T junction 4, and is crossed to form with the side's of damaging coaxial transmission line 5
The closed loop circuit being parallel to each other；Coupled end T junction 4 is connected to export too by adjacent 6 two support arms of branch side's coaxial transmission line
Hertz wave energy, THz wave energy divide 7 half-power of port to export from side according to the ratio of 1:1 with shaft work.
When signal is transmitted to the side of damaging 6 both ends of coaxial transmission line along match party coaxial transmission line 3, due to two paths of signals
Full symmetric, potential is identical, therefore does not transmit in the side's of damaging coaxial transmission line 6.
In an alternative embodiment, power divider circuit is realized based on square coaxial transmission line circuit form, in square coaxial transmission line
Wall and outer wall are square, and two square centers are overlapped.The characteristic impedance of square coaxial transmission line is by inner wall square side
Long and outer wall square side length codetermines, and characteristic impedance and the inner wall square side length of square coaxial transmission line are inversely proportional, and outer
Wall square side length is directly proportional.
Refering to Fig. 2.Terahertz signal is inputted from common end side's coaxial transmission line 1, is believed using A as amplitude, θ for the input of phase
Number Aejθ, the medium function of the coaxial T junction 2 of classical prescription is divided into two paths of signalsThe match party of λ/4 coaxial transmission line 3 is coupled in branch, and two
Road terahertz signal is flowed into the 7 output half-power letter of function point end of two branch ports of power splitter by coupled end T junction 4
Number.
Terahertz signal is inputted from top set side's coaxial transmission line 6, is the input signal Ae of phase by amplitude, θ of Ajθ, lead to
The function such as overcoupling end T junction 4 are divided into two paths of signalsAll the waySignal first passes through 3 branch of the match party of λ/4 coaxial transmission line
The coaxial T junction 2 in the side of being coupled to, function is divided intoIt is flowed into lower coupled end T junction 4；And another wayIt is coaxial in the side of damaging
5 amplitude fading 3dB of transmission line becomesThe signal of coupled end T junction 4 is under reachingTwo paths of signals is same in lower section
Constant amplitude is reversely offset in axis T junction 4, and coaxial transmission line 6 signal in branch-waveguide side's is without output, letter of the realization side with shaft work point end 7
Number isolation, wherein e is constant, and j is imaginary unit.
The above is present pre-ferred embodiments, it has to be noted that the present invention will be described for above-described embodiment, so
And the present invention is not limited thereto, and those skilled in the art can be designed when being detached from scope of the appended claims
Alternative embodiment.For those skilled in the art, without departing from the spirit and substance in the present invention,
Various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. power splitters such as a kind of side's coaxial transmission line Terahertzs, comprising: square coaxial transmission line with the coaxial internal and external conductor in side and
Terahertz power splitter, it is characterised in that: common end side's coaxial transmission line (1) passes through the public port (8) of Terahertz power splitter, hangs down
It is direct-connected to connect the coaxial T junction (2) in the side being built in power splitter rectangular cavities, coaxial T junction (2) the two-way vertical branch transmission line in side
Forward it is connected coupled end T junction (4) by the match party of λ/4 coaxial transmission line (3) being connected on upper/lower terminal point, while forward
Two branch side's coaxial transmission lines (6) are connected by coupled end T junction (4), two branch side's coaxial transmission lines (6) pass through upper and lower coupling
It closes end T junction (4) to intersect vertically the side's of damage coaxial transmission line (5), extends to the function point end (7) of two branch ports, constitute output
The power divider circuit of power signal.
2. power splitters such as side's coaxial transmission line Terahertzs as described in claim 1, it is characterised in that: square coaxial transmission line inner wall
It is square with outer wall, and two square centers are overlapped.
3. power splitters such as side's coaxial transmission line Terahertzs as claimed in claim 2, it is characterised in that: the spy of square coaxial transmission line
Property impedance codetermined by inner wall square side length and outer wall square side length, the characteristic impedance of square coaxial transmission line and inner wall are just
Quad Sides length is inversely proportional, directly proportional to outer wall square side length.
4. power splitters such as side's coaxial transmission line Terahertzs as described in claim 1, it is characterised in that: common end side's coaxial transmission
The characteristic impedance of line (1), branch side's coaxial transmission line (6) is 50 Ω, the characteristic impedance of the 2 sections of match party of λ/4 coaxial transmission lines (3)
For 70 Ω, the characteristic impedance of the side's of damaging coaxial transmission line (5) is 100 Ω.
5. power splitters such as side's coaxial transmission line Terahertzs as described in claim 1, it is characterised in that: common end side's coaxial transmission
Line (1) terminates the two sections of match party of λ/4 coaxial transmission lines (3) by the coaxial T junction (2) in side and connects coupled end T junction (4), and with
The side's of damaging coaxial transmission line (5) is crossed to form the closed loop circuit being parallel to each other.
6. power splitters such as side's coaxial transmission line Terahertzs as described in claim 1, it is characterised in that: coupled end T junction (4) is logical
Cross adjacent branch side's coaxial transmission line (6) two support arms output THz wave energy, THz wave energy according to 1:1 ratio
Half-power is exported respectively from two sides with shaft work point port 7.
7. power splitters such as side's coaxial transmission line Terahertzs as described in claim 1, it is characterised in that: power divider circuit is based on side
Coaxial transmission line circuit form is realized.
8. power splitters such as side's coaxial transmission line Terahertzs as described in claim 1, it is characterised in that: terahertz signal passes through public affairs
Total end side coaxial transmission line (1) input, in side, coaxially T junction (2) moderate range function is divided into two-way, two-way branch signal edge through λ/
After 4 match party coaxial transmission line (3) impedance matchings, it is fed into full symmetric, the identical coupled end T junction (4) of potential, through excessive
Coaxial transmission line (6) two support arms in branch waveguide side export two half-power signals.
9. power splitters such as side's coaxial transmission line Terahertzs as described in claim 1, it is characterised in that: terahertz signal is from public
Square coaxial transmission line (1) input, is the input signal Ae of phase by amplitude, θ of Ajθ, the coaxial T junction of classical prescription (2) medium function is divided into
Two paths of signalsThe match party of λ/4 coaxial transmission line (3) is coupled in branch, and two-way terahertz signal passes through coupled end T junction
(4) it is flowed into function point end (7) the output half-power signal of two branch ports of power splitter.
10. the power splitters such as square coaxial transmission line Terahertz described in requiring 1, it is characterised in that: terahertz signal is from top set side
Coaxial transmission line (6) input, is the input signal Ae of phase by amplitude, θ of Ajθ, it is divided by function such as upper coupled end T junctions (4)
Two paths of signalsAll the waySignal first passes through the coaxial T junction in the match party of λ/4 coaxial transmission line (3) side of being coupled to, branch
(2), function is divided intoIt is flowed into lower coupled end T junction (4)；And another wayCoaxial transmission line (5) in the side of damaging
Amplitude fading 3dB becomesThe signal of coupled end T junction (4) is under reachingTwo paths of signals is in the coaxial T in lower section
Constant amplitude is reversely offset in type knot (4), and coaxial transmission line (6) signal in branch-waveguide side's is without output, letter of the realization side with shaft work point end 7
Number isolation, wherein e is constant, and j is imaginary unit.
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| CN201910704717.7A CN110492214A (en) | 2019-07-31 | 2019-07-31 | The power splitters such as square coaxial transmission line Terahertz |
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| CN201910704717.7A CN110492214A (en) | 2019-07-31 | 2019-07-31 | The power splitters such as square coaxial transmission line Terahertz |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111146549A (en) * | 2020-01-14 | 2020-05-12 | 电子科技大学 | Grounding coplanar waveguide power distribution/synthesis network based on coupling structure |
| CN111540997A (en) * | 2020-04-29 | 2020-08-14 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Integrated vertical transition power divider |
| CN113067155A (en) * | 2021-02-26 | 2021-07-02 | 成都天马微电子有限公司 | Transmission line structure, manufacturing method thereof and liquid crystal antenna |
| CN113612000A (en) * | 2021-07-31 | 2021-11-05 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Rectangular waveguide I-shaped isolation network double-microstrip converter |
| CN114421110A (en) * | 2022-01-21 | 2022-04-29 | 陈晨 | Power divider for equally distributing power and voltage |
| CN114976556A (en) * | 2022-05-23 | 2022-08-30 | 赛莱克斯微系统科技（北京）有限公司 | Micro-electromechanical system (MEMS) micro-coaxial power divider |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111146549A (en) * | 2020-01-14 | 2020-05-12 | 电子科技大学 | Grounding coplanar waveguide power distribution/synthesis network based on coupling structure |
| CN111146549B (en) * | 2020-01-14 | 2021-04-20 | 电子科技大学 | Grounding coplanar waveguide power distribution/synthesis network based on coupling structure |
| CN111540997A (en) * | 2020-04-29 | 2020-08-14 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Integrated vertical transition power divider |
| CN113067155A (en) * | 2021-02-26 | 2021-07-02 | 成都天马微电子有限公司 | Transmission line structure, manufacturing method thereof and liquid crystal antenna |
| CN113612000A (en) * | 2021-07-31 | 2021-11-05 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Rectangular waveguide I-shaped isolation network double-microstrip converter |
| CN113612000B (en) * | 2021-07-31 | 2022-06-14 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Rectangular waveguide I-shaped isolation network double-microstrip converter |
| CN114421110A (en) * | 2022-01-21 | 2022-04-29 | 陈晨 | Power divider for equally distributing power and voltage |
| CN114421110B (en) * | 2022-01-21 | 2023-08-11 | 北京汇芯通电子科技有限公司 | Power divider capable of equally distributing power voltage |
| CN114976556A (en) * | 2022-05-23 | 2022-08-30 | 赛莱克斯微系统科技（北京）有限公司 | Micro-electromechanical system (MEMS) micro-coaxial power divider |
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