CN105846037A - Terahertz power divider design method based on machining - Google Patents
Terahertz power divider design method based on machining Download PDFInfo
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- CN105846037A CN105846037A CN201510814367.1A CN201510814367A CN105846037A CN 105846037 A CN105846037 A CN 105846037A CN 201510814367 A CN201510814367 A CN 201510814367A CN 105846037 A CN105846037 A CN 105846037A
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Abstract
The invention discloses a terahertz power divider design method based on machining. A power divider comprises an input end, a direct transmission end, an isolation end, and a coupling end. The part from the input end to the direct transmission end is a main waveguide, and the part from the isolation end to the coupling end is an auxiliary waveguide. At least two coupling branches are formed between the main waveguide and the auxiliary waveguide. The spacing between the main waveguide and the auxiliary waveguide is equal to a half waveguide, and the center-to-center spacing between the coupling branches is equal to a half waveguide. Under the condition of not changing the amplitude relationship between the main and auxiliary branches of the power divider, the spacing between the main and auxiliary waveguides and the spacing between the coupling gaps are respectively increased or simultaneously increased by a half wavelength. Because of size increase, the difficulty of machining is reduced effectively, and the power divider can bear stress. In addition, the larger the number of half wavelengths increased is, the lower the transmission bandwidth of the power divider is.
Description
Technical field
The invention belongs to THz communication technology field, a kind of Terahertz power splitter design adding realization based on machine
Method.
Technical background
The Terahertz power splitter that mechanically-based processing realizes is except needing to consider the signal transmission spy of power divider itself
Outside property, in addition it is also necessary to consider the realizability of machining.Due to the altofrequency of Terahertz, its wavelength reduces at power divider
In key structure, groove width and metal partion (metp) are all in 0.1mm magnitude, and machine adds error precision in 0.01mm magnitude, sets by tradition typical case
Meter, the spacing dimension of coupling unit is 0.1mm magnitude, error ratio 10%；Especially for the power divider having insulated degree requirement
For, realize generally by the slot-coupled between rectangular waveguide.
Traditional theory is thought, the spacing of its coupling slit centers and the spacing of major and minor branch road are quarter-wave,
The size in gap is determined by the degree of coupling.But, so result of design is that to result in the metallic walls between the spacing of gap the thinnest, difficult
To bear the stress of machining.
Summary of the invention
It is an object of the invention to overcome above-mentioned technical problem, it is provided that a kind of Terahertz power splitter adding realization based on machine
Method for designing, is not changing between the major and minor branch road of power divider in the case of amplitude relation, by major and minor waveguide spacing and coupling
Joint close gap spacing, both increase or increase simultaneously half wavelength respectively, and so, the increase of its size can effectively reduce machinery
The difficulty of processing, it is possible to meet with stresses；It addition, the half-wavelength quantity increased is the most, the transmission bandwidth of power splitter is the lowest.
Technical scheme is as follows:
Power divider based on waveguide bridge coupling, it is characterised in that: include input, direct transfer end, isolation end and coupled end,
Input is main waveguide to the end that direct transfers, and isolation end to coupled end is that complementary wave is led, described main waveguide be formed between complementary wave is led to
Few two-way coupling branch road, the spacing between main waveguide and complementary wave are led is half waveguide, simultaneously the center distance between coupling branch road
It it is half waveguide.
By the symmetry of its structure, the odd-even mode analytical method being similar in microstrip coupled provision of on-line analysis methodology can be used to enter
Row is analyzed.A part for main waveguide power is coupled to complementary wave and leads, and the size of coupled power is structure physical size and master
The function of waveguide power transmission direction.Even, the interaction of strange intermode can reduce the coupling between two transmission lines, and coupled structure is special
Property may, the linear combination of strange mould even by these describe.
For even mould, the plane of symmetry, i.e. input and coupled end present the face of constant amplitude cophase wave, become open circuit surface, magnetize wall
Effect.
Strange mould, i.e. input and coupled end then being occurred to the plane of symmetry of constant amplitude rp-wave, become a short circuit face, electrify wall
Effect.Therefore, directional coupler can be analyzed by a two-port network, and its overall response can be by dual module with strange
The comprehensive response that mould excitation calculates is tried to achieve.
In symmetric directional coupler, even, strange mould transmission coefficient and reflection coefficient is usually utilized to seek its response relation.
Beneficial effects of the present invention is as follows:
1, present configuration is compact, simple possible, functional；The spacing of major-minor waveguide is set to half waveguide long, simultaneously
The coupling gap spacing of major-minor waveguide can also be also configured as half waveguide long, such size is arranged can effectively reduce machine
The difficulty of tool processing, it is possible to meet with stresses；The design of such structure can be realized by machining, it is simple to commercialization；Reduce
The difficulty of machining；The integral multiple of half-wavelength is sized to easily realize in the processing of Terahertz frequency range.
2, after in present configuration, the size of coupling unit changes increase, spacing dimension is 0.5mm magnitude, and error ratio is
2%, so will be substantially reduced the mismachining tolerance impact on Terahertz power divider transmission performance.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the present invention；
Fig. 2-5 is the even and odd mode analysis principle schematic of the present invention；
Fig. 6 is input port S11 of the present invention and the schematic diagram of isolated port S12；
Fig. 7 is the schematic diagram of merit point two-port amplitude of the present invention；
Fig. 8 is the schematic diagram of merit point two-port phase place of the present invention；
Fig. 9 is the basic model schematic diagram of the 0.34THz directional coupler that the present invention builds；
Figure 10 is the circuit size schematic diagram of the specific design 0.34THz manifold type power splitter of the present invention；
Figure 11 is the back-to-back measured result schematic diagram that the present invention realizes 0.14THz power divider；
Figure 12 is that the present invention realizes 0.34THz power divider back-to-back measured result schematic diagram.
Detailed description of the invention
As it is shown in figure 1, the present invention is power divider based on waveguide bridge coupling, including input, the end that direct transfers, isolation
End and coupled end, input is main waveguide to the end that direct transfers, and isolation end to coupled end is that complementary wave is led, and described main waveguide leads it in complementary wave
Between be formed at least two-way coupling branch road, the spacing between main waveguide and complementary wave are led is half waveguide, simultaneously coupling branch road between
Center distance be half waveguide.
By the symmetry of its structure, the odd-even mode analytical method being similar in microstrip coupled provision of on-line analysis methodology can be used to enter
Row is analyzed.A part for main waveguide power is coupled to complementary wave and leads, and the size of coupled power is structure physical size and master
The function of waveguide power transmission direction.Even, the interaction of strange intermode can reduce the coupling between two transmission lines, and coupled structure is special
Property may, the linear combination of strange mould even by these describe.
For said structure, can be as having the four-pole network of the plane of symmetry, as shown in Figure 2-5, its port 1,2,3,4 is respectively
Corresponding input port, the port that direct transfers, isolated port, coupling port.
For even mould, as it is shown on figure 3, plane of symmetry port 1 and port 4 present the face of constant amplitude cophase wave, i.e. become open circuit surface,
Magnetize wall effect.
For strange mould, as shown in Figure 4, port 1 and port 4 then occur the plane of symmetry of constant amplitude rp-wave, become a short circuit
Face, electrify wall effect.Therefore, directional coupler can be analyzed by a two-port network, and its overall response can be passed through
The comprehensive response that dual module and Qi Mo excitation calculate is tried to achieve.
In symmetric directional coupler, even, strange mould transmission coefficient and reflection coefficient is usually utilized to seek its response relation.
In the design, according to the reciprocity of structure, do not considering loss, dispersion etc. ideally, following S can be written
Parameters relationship:
S11=0
S12=Te
S13=Γe
S14=0
Wherein, S11Represent the reflection coefficient of port 1, S12Represent to the transmission coefficient of port 2, S13Represent the transmission system to port 3
Number, S14Represent the transmission coefficient to port 4, TeAnd ΓeIt is respectively transmission coefficient and the reflection coefficient of every transmission lines.
As shown in figs 6-8, ideally, signal is after input feed-in bonder, and isolation end mates completely does not has energy anti-
Penetrate, isolate with input port；Coupled end, direct transfer phase 90 ° between port, and power magnitude sum is equal to total input of input
Power, can carry out required power distribution by adjusting the change of the degree of coupling.
When designing as power splitter, as long as the control degree of coupling is to 3dB, i.e. available required result.
Concrete design example is as follows:
According to aforementioned schemes, carrying out the design of 0.34THz directional coupler, basic threedimensional model is illustrated in fig. 9 shown below, specific design
Process is as follows:
(1) determine the bandwidth of operation of bonder, and calculate the waveguide wavelength of frequency centered by 0.34THz；
(2) according to typical waveguide bridge design theory, the design of preliminary waveguide coupler is completed；
(3) according to the numerical value of waveguide wavelength, major-minor waveguide spacing and coupling gap spacing are increased；
(4) model after improving is re-started Electromagnetic Simulation meter and close optimization；
(5) matching section is increased at each port, can good connection with standard waveguide；
(6) complete is designed a model in importing machining design software, complete structure design, and processing of publishing picture；
(7) use vector network analyzer to test the device after processing, obtain test result.
The design circuit size of 0.34THz manifold type power splitter, as shown in Figure 10:
It addition, the half-wavelength quantity increased is the most, the transmission bandwidth of power divider is the lowest, therefore, only increases a half-wavelength
It is suitable.
Through experiment test, 0.14THz and 0.34THz frequency range all achieves above-mentioned design, and ensure that about
The bandwidth of 10%, its back-to-back test result is as depicted in figs. 11-12.
Claims (2)
1. the Terahertz power splitter method for designing adding realization based on machine, it is characterised in that: include input, the end that direct transfers, every
From end and coupled end, input is main waveguide to the end that direct transfers, and isolation end to coupled end is that complementary wave is led, and described main waveguide is led in complementary wave
Between be formed at least two-way coupling branch road, the spacing between main waveguide and complementary wave are led is half waveguide.
A kind of Terahertz power splitter method for designing adding realization based on machine the most according to claim 1, it is characterised in that: institute
The center distance stated between coupling branch road is half waveguide.
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| CN201510814367.1A CN105846037A (en) | 2015-11-23 | 2015-11-23 | Terahertz power divider design method based on machining |
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| CN201510814367.1A CN105846037A (en) | 2015-11-23 | 2015-11-23 | Terahertz power divider design method based on machining |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558749A (en) * | 2016-11-04 | 2017-04-05 | 成都九洲迪飞科技有限责任公司 | A kind of waveguide bridge with high pass filter function |
| CN106921015A (en) * | 2017-04-14 | 2017-07-04 | 重庆邮电大学 | The road power splitter of branch line electric bridge Terahertz four |
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|---|---|---|---|---|
| US20090273532A1 (en) * | 2008-05-02 | 2009-11-05 | William Marsh Rice University | Ultra Low Loss Waveguide for Broadband Terahertz Radiation |
| US7907032B2 (en) * | 2009-01-06 | 2011-03-15 | Mitsubishi Electric Corporation | Directional coupler |
| CN103579732A (en) * | 2013-09-18 | 2014-02-12 | 电子科技大学 | Millimeter wave high-isolation 3dB directional coupler |
| CN104810591A (en) * | 2015-04-17 | 2015-07-29 | 中国工程物理研究院电子工程研究所 | Cross-I-shaped bridge terahertz waveguide directional coupler |
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2015
- 2015-11-23 CN CN201510814367.1A patent/CN105846037A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090273532A1 (en) * | 2008-05-02 | 2009-11-05 | William Marsh Rice University | Ultra Low Loss Waveguide for Broadband Terahertz Radiation |
| US7907032B2 (en) * | 2009-01-06 | 2011-03-15 | Mitsubishi Electric Corporation | Directional coupler |
| CN103579732A (en) * | 2013-09-18 | 2014-02-12 | 电子科技大学 | Millimeter wave high-isolation 3dB directional coupler |
| CN104810591A (en) * | 2015-04-17 | 2015-07-29 | 中国工程物理研究院电子工程研究所 | Cross-I-shaped bridge terahertz waveguide directional coupler |
Non-Patent Citations (1)
| Title |
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| 康小克 等: "基于3dB 定向耦合器的0.14THz 功率分配器设计方法", 《红外与激光》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558749A (en) * | 2016-11-04 | 2017-04-05 | 成都九洲迪飞科技有限责任公司 | A kind of waveguide bridge with high pass filter function |
| CN106921015A (en) * | 2017-04-14 | 2017-07-04 | 重庆邮电大学 | The road power splitter of branch line electric bridge Terahertz four |
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