CN109858198A - A kind of microwave vacuum window design method of combination feed - Google Patents
A kind of microwave vacuum window design method of combination feed Download PDFInfo
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- CN109858198A CN109858198A CN201910287536.9A CN201910287536A CN109858198A CN 109858198 A CN109858198 A CN 109858198A CN 201910287536 A CN201910287536 A CN 201910287536A CN 109858198 A CN109858198 A CN 109858198A
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- vacuum window
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Abstract
The present invention relates to the microwave vacuum window design methods that one of receiver field combines feed, this method substitutes into microwave vacuum window in specific feed system, it is optimized using the gain of reflector antenna or G/T value as evaluation criterion, to fundamentally solves the problems, such as in the past design in microwave vacuum window on antenna performance influence missing or inaccuracy, antenna performance decline it is uncontrollable, the purpose that antenna performance is optimal in broadband is realized, the design suitable for various coolant receiver microwave vacuum windows.Breach the thinking for being designed illumination angle, irradiation level as the interface of microwave vacuum window and feed in existing method.
Description
Technical field
The present invention relates to the microwave vacuum window design methods that one of receiver field combines feed, dedicated for various
The design of coolant receiver microwave vacuum window.
Background technique
Microwave vacuum window assembly is the transmission window that signal enters feed in Dewar, is the key that cryogenic unit design portion
Point.The leakproofness of Dewar system, the transmission characteristic of microwave signal and microwave vacuum window are closely bound up.Low-loss pressure bearing and seal material
Selection, connect the selection of waveguide material, the structure design for connecting waveguide and microwave vacuum window is the design of vacuum sealing window assembly
With the key point of production.
Since the relative dielectric constant of microwave vacuum window is inconsistent with air, electromagnetic wave is caused to pass through microwave vacuum
It can be reflected when window, the loss of microwave vacuum window also results in the gain decline of antenna and the raising of noise temperature, from
And influence the overall performance of antenna.Traditional microwave vacuum window is usually to be designed based on Gaussian illumination, that is, is assumed
Feed directional diagram is Gaussian beam, ignores the presence of feed and reflector antenna, only guarantees that mounting flange does not hide in illumination angle
Gear, and it is thin as far as possible when meeting mechanical property, and it is optimal that the antenna performance designed in this way, which is difficult to ensure,.Especially exist
Broadband coolant receiver design in, describe feed directional diagram and microwave vacuum window unit for electrical property parameters with frequency variation compared with
Greatly, it is difficult to guarantee the performance of reflector antenna.
Summary of the invention
The object of the present invention is to provide a kind of microwave vacuum window design method of combination feed, this method is true by microwave
Empty window substitutes into specific feed system, optimizes using the gain of reflector antenna or G/T value as evaluation criterion, from
And microwave vacuum window influences missing to antenna performance in fundamentally solving previous design or inaccuracy, antenna performance decline can not
The problem of control, realizes the purpose that antenna performance is optimal in broadband, is suitable for various coolant receiver microwave vacuums
The design of window.It breaches in existing method and is designed using illumination angle, irradiation level as the interface of microwave vacuum window and feed
Thinking.
A kind of microwave vacuum window design method of combination feed of the present invention, follows these steps to carry out:
A, microwave vacuum window is chosen, using the parameter of microwave vacuum window as optimized variable, and gives the initial of these parameters
Value, obtains initial design parameters；
B, the initial design parameters for choosing step a carry out simulation analysis to the feed comprising microwave vacuum window, obtain work
The performance parameter for making feed in frequency band is antenna pattern and voltage standing wave ratio；
C, the performance parameter of feed obtained in step b is substituted into specific reflector antenna and carries out simulation calculation, obtained
To the antenna pattern of reflector antenna, the performance parameter for obtaining reflector antenna according to the antenna pattern of reflector antenna is
Gain, the first sidelobe level and G/T value；
D, using the performance parameter of reflector antenna as evaluation function, using optimization algorithm, to the part of microwave vacuum window
Or whole initial design parameters optimize, the microwave vacuum window after obtaining the optimization for being optimal reflector antenna performance
Parameter, and as the final design parameter of microwave vacuum window, to complete the design of microwave vacuum window.
The initial design parameters of microwave vacuum window in step a use the mechanical property of medium, to guarantee that it meets pressure-bearing
Requirement.
It include the thickness of every layer of medium for multilayered structure initial design parameters in step a microwave vacuum window, radius, opposite
Dielectric constant and loss tangent angle.
Optimization algorithm in step d is global and local optimization algorithm.
A kind of microwave vacuum window design method of combination feed of the present invention, the method for simulation calculation is removed in this method
Outside using the reflector antenna of practical application, equivalent parabola method, equivalent mouth face field method, focal plane field match party also can be used
Method or interarea occlusion method.
The invention has the following advantages over the prior art:
1. the present invention has broken original barrier of microwave vacuum window and feed, the two is considered as an entirety, with micro-
The feed of wave vacuum window is placed in reflector design, using the best performance of antenna as design criteria, and is carried out on this basis
The optimized design of the two, thus fundamentally solve previous microwave vacuum window design when antenna performance decline assessment missing or not
Accurately, antenna performance declines uncontrollable problem；
2. being suitable for the design of various coolant receiver feeds.
Detailed description of the invention
Fig. 1 is mentality of designing flow chart of the invention；
Fig. 2 is broadband feed optimization design flow chart of the invention.
Specific embodiment
A kind of microwave vacuum window design method of combination feed of the present invention, such as Fig. 1:
A, the form for choosing microwave vacuum window, using the parameter of microwave vacuum window as optimized variable, and gives these parameters
Initial value, obtain initial design parameters, wherein the initial design parameters of microwave vacuum window need to consider the power for the medium that it is used
Performance is learned, to guarantee that it meets the requirement of pressure-bearing；For the microwave vacuum window of multilayered structure, initial design parameters include every layer of Jie
Thickness, radius, relative dielectric constant and the loss tangent angle of matter；
B, according to the initial design parameters of selection, simulation analysis is carried out to the feed comprising microwave vacuum window, obtains work
The performance parameter of feed in frequency band；The performance parameter of feed includes antenna pattern and voltage standing wave ratio；
C, the performance parameter of feed obtained in step b is substituted into specific reflector antenna and carries out simulation calculation, obtained
To the antenna pattern of reflector antenna, the performance parameter of reflector antenna is obtained according to the antenna pattern of reflector antenna,
The performance parameter of reflector antenna includes gain, the first sidelobe level and G/T value, and wherein the method for simulation calculation is removed using practical
Outside the reflector antenna of application, equivalent parabola method, equivalent mouth face field method, focal plane field matching method or interarea also can be used
Occlusion method；
D, using the performance parameter of reflector antenna as evaluation function, using optimization algorithm, to the part of microwave vacuum window
Or whole initial design parameters optimize, the microwave vacuum window after obtaining the optimization for being optimal reflector antenna performance
Parameter and final design parameter as microwave vacuum window, to complete the design of microwave vacuum window；
By taking genetic algorithm as an example, as shown in Fig. 2, if one group of parameter is not present in initial design parameters population, if wanting to make this
The corresponding microwave vacuum window of group parameter meets design requirement, then executes selection operator to initial design parameters, design to judge
Whether parameter is selected；If selected, the laggard row variation judgement of crossover operator is executed, if do not selected,
Directly carry out variation judgement；If it is determined that variation, then execute mutation operator and carry out the feed with new microwave vacuum window
Can emulation, if it is determined that and it is unmanifest, then directly carry out with new microwave vacuum window feed source performance emulate；Feed is imitated later
True result substitutes into reflector antenna and is analyzed, and then returns to rejudge whether meet design requirement.
Claims (4)
1. a kind of microwave vacuum window design method of combination feed, it is characterised in that follow these steps to carry out:
A, microwave vacuum window is chosen, using the parameter of microwave vacuum window as optimized variable, and the initial value of these parameters is given, obtains
To initial design parameters；
B, the initial design parameters for choosing step a carry out simulation analysis to the feed comprising microwave vacuum window, obtain work frequency
Performance parameter with interior feed is antenna pattern and voltage standing wave ratio；
C, the performance parameter of feed obtained in step b is substituted into specific reflector antenna and carries out simulation calculation, obtained anti-
The antenna pattern for penetrating surface antenna obtains the performance parameter of reflector antenna according to the antenna pattern of reflector antenna to increase
Benefit, the first sidelobe level and G/T value；
D, the part or complete using the performance parameter of reflector antenna as evaluation function, using optimization algorithm, to microwave vacuum window
Portion's initial design parameters optimize, the ginseng of the microwave vacuum window after obtaining the optimization for being optimal reflector antenna performance
Number, and as the final design parameter of microwave vacuum window, to complete the design of microwave vacuum window.
2. the microwave vacuum window design method of a kind of combination feed according to claim 1, it is characterised in that micro- in step a
The initial design parameters of wave vacuum window use the mechanical property of medium, to guarantee that it meets the requirement of pressure-bearing.
3. the microwave vacuum window design method of a kind of combination feed according to claim 1, it is characterised in that step a microwave is true
It include the thickness, radius, relative dielectric constant and loss tangent of every layer of medium for multilayered structure initial design parameters in empty window
Angle.
4. the microwave vacuum window design method of a kind of combination feed according to claim 1, it is characterised in that excellent in step d
Change algorithm is global and local optimization algorithm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910287536.9A CN109858198A (en) | 2019-04-11 | 2019-04-11 | A kind of microwave vacuum window design method of combination feed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910287536.9A CN109858198A (en) | 2019-04-11 | 2019-04-11 | A kind of microwave vacuum window design method of combination feed |
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| Publication Number | Publication Date |
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| CN109858198A true CN109858198A (en) | 2019-06-07 |
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| CN201910287536.9A Pending CN109858198A (en) | 2019-04-11 | 2019-04-11 | A kind of microwave vacuum window design method of combination feed |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356068A (en) * | 2015-10-12 | 2016-02-24 | 中国电子科技集团公司第五十四研究所 | Optimum design method for broadband feed source |
| CN106129634A (en) * | 2016-07-14 | 2016-11-16 | 东南大学 | A kind of gain optimization method of difunctional holographic reflections array antenna based on Array Method |
| CN106207475A (en) * | 2016-07-26 | 2016-12-07 | 北京理工大学 | A kind of multiband complete polarization antenna feed device of Shared aperture multiplexing |
-
2019
- 2019-04-11 CN CN201910287536.9A patent/CN109858198A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356068A (en) * | 2015-10-12 | 2016-02-24 | 中国电子科技集团公司第五十四研究所 | Optimum design method for broadband feed source |
| CN106129634A (en) * | 2016-07-14 | 2016-11-16 | 东南大学 | A kind of gain optimization method of difunctional holographic reflections array antenna based on Array Method |
| CN106207475A (en) * | 2016-07-26 | 2016-12-07 | 北京理工大学 | A kind of multiband complete polarization antenna feed device of Shared aperture multiplexing |
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Application publication date: 20190607 |
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