CN112255603A - Multi-band double-layer FSS design based on Jaumann screen - Google Patents
Multi-band double-layer FSS design based on Jaumann screen Download PDFInfo
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- 238000013461 design Methods 0.000 title claims abstract description 39
- 238000004088 simulation Methods 0.000 claims abstract description 19
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 238000012795 verification Methods 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 40
- 239000002356 single layer Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 230000002068 genetic effect Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 claims 2
- 238000005260 corrosion Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 claims 1
- 230000005684 electric field Effects 0.000 claims 1
- 238000013031 physical testing Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000012938 design process Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 238000003486 chemical etching Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/27—Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06N—COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
- G06N3/00—Computing arrangements based on biological models
- G06N3/12—Computing arrangements based on biological models using genetic models
- G06N3/126—Evolutionary algorithms, e.g. genetic algorithms or genetic programming
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
- G01S7/4082—Means for monitoring or calibrating by simulation of echoes using externally generated reference signals, e.g. via remote reflector or transponder
- G01S7/4086—Means for monitoring or calibrating by simulation of echoes using externally generated reference signals, e.g. via remote reflector or transponder in a calibrating environment, e.g. anechoic chamber
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
- G01S7/4082—Means for monitoring or calibrating by simulation of echoes using externally generated reference signals, e.g. via remote reflector or transponder
- G01S7/4095—Means for monitoring or calibrating by simulation of echoes using externally generated reference signals, e.g. via remote reflector or transponder the external reference signals being modulated, e.g. rotating a dihedral reflector or modulating a transponder for simulation of a Doppler echo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/10—Numerical modelling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/18—Manufacturability analysis or optimisation for manufacturability
Abstract
The invention relates to a double-layer Frequency Selective Surface (FSS) which is designed based on a Jaumann screen and can be used for multi-band wave absorption. The improved structure allows greater design freedom in terms of overall depth and width. The overall design process comprises the following steps: the structure comprises a double-layer structure design, a modeling simulation, a circuit test verification, a real object manufacturing and a verification test, and the final structure can realize the effect of simultaneously absorbing electromagnetic waves in multiple bands.
Description
Technical Field
The invention relates to the field of aircraft radar stealth, in particular to a multi-band double-layer FSS design based on a Jaumann screen.
Background
From the fact that maxwell predicts the existence of electromagnetic waves by formula, the electromagnetic waves play an important role in the fields of human communication, broadcasting and information nowadays, and the electromagnetic waves play an increasingly important role in human production and life.
In the military field, Radar Cross Section (RCS) technology is also becoming increasingly important in stealth use of fighters. With the continuous development of the working frequency band of the radar, the traditional single-layer single-frequency-band wave absorber designed according to the Salisbury screen is difficult to meet the current requirements.
Disclosure of Invention
The invention designs a multiband double-layer Frequency Selective Surface (FSS) based on the design principle of a Jaumann screen, can realize the effect of simultaneously absorbing electromagnetic waves in a plurality of wave bands, and comprises the following specific design steps:
step 1, designing a double-layer structure. The wave absorbing body is designed into a wave absorbing body which can simultaneously have wave absorbing effect in two frequency bands through two-layer superposition design.
And 2, HFSS modeling simulation. For the earlier-stage design scheme, simulation tests are respectively carried out on the single-layer model and the superposed double-layer model of the upper layer and the lower layer on the HFSS. In the simulation modeling process, the problem that whether the sizes of the upper layer and the lower layer are in proportion in the simulation reality needs to be adjusted is solved.
And 3, testing the simulation circuit based on the ADS. Abstracting the simulation model of the HFSS into a parameter model, and establishing a parameter circuit diagram. The parameter value is manually adjusted through the parameter adjuster, the influence of the specific parameter adjusting direction on the whole result is obtained according to the curve change of the result after the parameter adjustment, and the pattern updating is guided.
And 4, manufacturing a model object. For the model designed by HFSS, a physical model was made by chemical etching.
And 5, testing and verifying. And (4) carrying out object test on the manufactured and molded object in a microwave dark room.
The invention has the advantages that: the multi-band wave absorbing body realized based on the Jaumann screen design principle can realize the absorption of electromagnetic waves at a plurality of frequency bands simultaneously, and greatly improves the practicability of the wave absorbing body in the radar stealth field. Meanwhile, on the basis of the design principle of the Jaumann screen, the Salisbury screen design principle is locally combined, the overall wave absorbing width is increased, and the design difficulty is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is an overall flow chart of the present invention.
FIG. 2 is a diagram of a two-layer model of the present invention.
Detailed Description
In order to make the usage purpose, technical solution and practical features of the present invention more detailed and easier to understand, the following describes each module structure and function of the present invention in detail with reference to the accompanying drawings in the embodiment of the present invention. It is to be understood that this description is directed to only some examples of the invention and not to all examples. Any embodiment based on the invention belongs to the protection scope of the invention without proposing the innovation of the technology.
The Salisbury screen is designed by a structure that the middle of an upper layer canvas is empty and a bottom layer is a metal floor, and the upper layer canvas is placed at the position, corresponding to the quarter wavelength of an absorption center frequency point, of the bottom layer metal plate, so that the magnitude of electromagnetic conversion is increased. The Jaumann screen is designed for a double-layer structure, and each layer adopts a single-layer design principle to carry out wave-absorbing design. And under the condition that each wave band of the single-layer structure reaches the optimum, the two-layer structure is superposed, and finally the double-layer wave-absorbing effect is achieved. In the design of single-layer to double-layer stacking, the following problems need to be considered:
when the wave absorbing structure is designed on both sides, the lower wave absorbing structure is equivalent to the metal bottom plate on the upper layer, which requires that the lower wave absorbing body is similar to a piece of metal in the working frequency band of the upper wave absorbing body, namely, the wave is completely reflected. This requires that the lower layer pattern be designed with respect to its own wave-absorbing properties and the upper layer reflective properties.
When designing a double layer, in order to facilitate the feasibility of modeling a double layer pattern in simulation, a certain multiple relationship between an upper pattern and a lower pattern needs to be ensured.
And (5) simulation verification. The capacitance C and the inductance L are determined in accordance with the following formula in the case of a known frequency band. According to the capacitance and inductance, the approximate pattern is designed by combining the past design experience.
The design part can also adopt a simple design pattern, and ergodic parameter searching is realized through a genetic algorithm within a certain parameter setting range. Through the verification in the early stage, the ergodic parameter searching is possible to achieve the local optimal solution, and the global optimal solution can be obtained through a Newton method. This method is not described for the time being.
Simulation model of HFSS design as shown in FIG. 1
And (5) designing a circuit model. And carrying out abstract circuit design on the model structure designed by the HFSS, and carrying out circuit simulation design on the abstract structure through ADS. The design aims at guiding the improvement direction of pattern design by observing the influence of the adjustment parameter values on the final result through the circuit abstract design and embodying parameters such as capacitance and inductance in the pattern design into parameter values which can be adjusted one by one.
Template preparation and actual measurement verification. And (4) according to the model design result, making a model by using CAD. And carrying out experimental test on the manufactured model template, and carrying out interactive verification on the obtained test result and the simulation result.
Claims (4)
1. A multi-band double-layer FSS design based on a Jaumann screen comprises the following design and verification processes:
a) the double-layer structure design is characterized in that single-layer structures are respectively and independently designed, good wave absorbing effects are respectively and independently realized on two wave absorbing frequency bands, and the two wave absorbing frequency bands are fused into a double-layer wave absorber with wave absorbing effects in the two frequency bands through a two-layer superposition design;
b) carrying out HFSS modeling simulation, respectively carrying out simulation tests on a single-layer model and a superposed double-layer model on HFSS simulation software based on the design scheme of the previous step, and adjusting the sizes of an upper layer and a lower layer in the simulation design through simulation;
c) on the basis of ADS circuit simulation test, abstracting an HFSS simulation model into an electric field parameter model and designing a circuit diagram, manually adjusting the parameter value through a parameter adjuster, and obtaining the influence of a specific parameter on the overall result according to the change of a result curve after parameter adjustment to guide pattern adjustment;
d) manufacturing a real object, namely manufacturing a design pattern into a real model by a chemical corrosion method, and taking a honeycomb as an actual substitute in an air cavity in simulation;
e) and (4) experimental testing, namely placing the manufactured model in a microwave darkroom for physical testing.
2. The multiband double-layer FSS design based on the Jaumann screen is characterized in that the wave absorbing body at the lower layer in the step a) is in a wave absorbing action frequency band of the wave absorbing body at the upper layer, the whole structure is the Jaumann wave absorbing body, and the wave absorbing body can be similar to the Salisbury screen wave absorbing body between the upper layer and the lower layer and between the lower layer and the metal bottom plate.
3. The multi-band double-layer FSS design based on the Jaumann screen is characterized in that the step b) is that under the condition of a known frequency band according to a formula, the sizes of a capacitor C and an inductor L are calculated through simulation verification, and a pattern is designed according to the sizes of the capacitor and the inductor;
4. the multi-band double-layer FSS design based on the Jaumann screen as claimed in claim 1, wherein the step b) can adopt a simple design pattern, set a certain parameter range, and perform ergodic parameter searching through a genetic algorithm, so as to obtain a global optimal solution through a Newton method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011145139.7A CN112255603A (en) | 2020-10-23 | 2020-10-23 | Multi-band double-layer FSS design based on Jaumann screen |
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| CN202011145139.7A CN112255603A (en) | 2020-10-23 | 2020-10-23 | Multi-band double-layer FSS design based on Jaumann screen |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140266849A1 (en) * | 2013-03-15 | 2014-09-18 | Flextronics Ap, Llc | Method and apparatus for creating perfect microwave absorbing skins |
| CN104485516A (en) * | 2014-12-09 | 2015-04-01 | 汤炜 | Broadband wave absorbing layer structure based on bow tie type patches |
| CN104809270A (en) * | 2015-03-19 | 2015-07-29 | 南京理工大学 | Design method for square ring array electromagnetic absorber integrating equivalent circuit with genetic algorithm |
| WO2016121375A1 (en) * | 2015-01-26 | 2016-08-04 | 日本電気株式会社 | Frequency selective surface, wireless communication device and radar device |
| CN107946762A (en) * | 2017-11-15 | 2018-04-20 | 哈尔滨工业大学 | X-band based on C-type clamp layer radome wall construction minimizes high wave transparent FSS |
| CN108170950A (en) * | 2017-12-27 | 2018-06-15 | 电子科技大学 | Multilayer Frequency-Selective Surfaces absorbing material modeling optimization method based on neural network |
| CN211404744U (en) * | 2019-12-25 | 2020-09-01 | 海宁利伊电子科技有限公司 | Strong coupling frequency selection surface structure insensitive to incident electromagnetic wave full angle |
-
2020
- 2020-10-23 CN CN202011145139.7A patent/CN112255603A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140266849A1 (en) * | 2013-03-15 | 2014-09-18 | Flextronics Ap, Llc | Method and apparatus for creating perfect microwave absorbing skins |
| CN104485516A (en) * | 2014-12-09 | 2015-04-01 | 汤炜 | Broadband wave absorbing layer structure based on bow tie type patches |
| WO2016121375A1 (en) * | 2015-01-26 | 2016-08-04 | 日本電気株式会社 | Frequency selective surface, wireless communication device and radar device |
| CN104809270A (en) * | 2015-03-19 | 2015-07-29 | 南京理工大学 | Design method for square ring array electromagnetic absorber integrating equivalent circuit with genetic algorithm |
| CN107946762A (en) * | 2017-11-15 | 2018-04-20 | 哈尔滨工业大学 | X-band based on C-type clamp layer radome wall construction minimizes high wave transparent FSS |
| CN108170950A (en) * | 2017-12-27 | 2018-06-15 | 电子科技大学 | Multilayer Frequency-Selective Surfaces absorbing material modeling optimization method based on neural network |
| CN211404744U (en) * | 2019-12-25 | 2020-09-01 | 海宁利伊电子科技有限公司 | Strong coupling frequency selection surface structure insensitive to incident electromagnetic wave full angle |
Non-Patent Citations (3)
| Title |
|---|
| GHAFFER I. KIANI ET AL.: "Oblique Incidence Performance of a Novel Frequency Selective Surface Absorber", 《 IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》 * |
| 冯卫森: "多频段双层频率选择表面吸波体设计", 《中国优秀博硕士学位论文全文数据库（硕士） 信息科技辑》 * |
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