CN110690578B - Wave absorbing structure for solving problem that wave transmittance of antenna housing test for electronic warfare exceeds hundred - Google Patents
Wave absorbing structure for solving problem that wave transmittance of antenna housing test for electronic warfare exceeds hundred Download PDFInfo
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- CN110690578B CN110690578B CN201810742905.4A CN201810742905A CN110690578B CN 110690578 B CN110690578 B CN 110690578B CN 201810742905 A CN201810742905 A CN 201810742905A CN 110690578 B CN110690578 B CN 110690578B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
- H01Q15/0026—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective said selective devices having a stacked geometry or having multiple layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H01Q17/007—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with means for controlling the absorption
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- Aerials With Secondary Devices (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention relates to a wave absorbing structure for solving the problem that the wave transmittance of an electronic warfare antenna housing test exceeds one hundred, which is characterized in that: a broadband metamaterial wave absorber is arranged between a tool for installing a test antenna and the test antenna, the length of the broadband metamaterial wave absorber is the length of a radome, the width of the broadband metamaterial wave absorber is the width of the radome, and the thickness of the broadband metamaterial wave absorber is a quarter wavelength of a frequency difference between a test starting frequency and a test ending frequency. The broadband metamaterial wave absorber effectively eliminates reflected waves and clutter formed between an electronic warfare test antenna and an electronic warfare radome under the frequency of 20-40 Ghz. The data of the wave transmission rate of the electronic warfare radome is reduced, the test data are more accurate and reliable, and the electrical property of the radome can be more accurately reflected.
Description
Technical Field
The invention belongs to the technical field of electric performance testing of radar covers for electronic warfare, and relates to a wave absorbing structure for solving the problem that the wave penetration rate of a radar cover for electronic warfare is over one hundred.
Background
In the process of testing the wave transmittance of the electronic warfare radome, the working frequency of the electronic warfare test antenna is usually 20Ghz to 40Ghz, and in the process of testing the wave transmittance of the electronic warfare radome with a wide frequency band, a lot of reflected waves are formed between the electronic warfare test antenna and the electronic warfare radome. Under the influence of reflected waves and clutter interference, the wave transmittance of the tested electronic warfare radar cover exceeds one hundred, and therefore the real electrical property of the electronic warfare radar cover is influenced.
Disclosure of Invention
The purpose of the invention is: the wave absorbing structure solves the problem that the wave penetration rate of the electronic warfare radome is over one hundred in the test. Reflected waves and clutter formed between the electronic warfare test antenna and the electronic warfare radome are eliminated as much as possible. The test can truly reflect the electrical performance of the electronic warfare radome.
The technical scheme of the invention is as follows: the utility model provides a solve super hundred wave-absorbing structure of electron war antenna house test wave transmissivity which characterized in that: a broadband metamaterial wave absorber is arranged between a tool for installing a test antenna and the test antenna, the length of the broadband metamaterial wave absorber is the length of a radome, the width of the broadband metamaterial wave absorber is the width of the radome, and the thickness of the broadband metamaterial wave absorber is a quarter wavelength of a frequency difference between a test starting frequency and a test ending frequency.
The broadband metamaterial wave absorber is formed by overlapping 3 wave absorbing layers, and the wave absorbing layers are identical in structure.
The wave absorbing layer is formed by staggered arrangement of a plurality of longitudinally arranged horizontal opening circular electric resonance ring electromagnetic metamaterial units and vertical opening circular electric resonance ring electromagnetic metamaterial units, and the horizontal opening circular electric resonance ring electromagnetic metamaterial units and the vertical opening circular electric resonance ring electromagnetic metamaterial units are symmetrically printed on the front side and the back side of the FR4 board through metal films.
The electromagnetic metamaterial unit of the horizontal opening circular electric resonant ring and the electromagnetic metamaterial unit of the vertical opening circular electric resonant ring have the same specification and are arranged regularly and equidistantly.
The electromagnetic metamaterial unit with the horizontal opening and the circular electric resonance ring is composed of two 'mountain' -shaped metal films which are symmetrically arranged up and down, vertical edges in the middle of the two 'mountain' -shaped metal films are connected into a whole, and ends of the vertical edges on two sides are parallel to each other and are spaced.
The electromagnetic metamaterial unit with the vertical opening circular electric resonance ring is composed of two 'mountain' -shaped metal films which are arranged in bilateral symmetry, the middle vertical edges of the two 'mountain' -shaped metal films are connected into a whole, and the ends of the two vertical edges on the two sides are parallel to each other and leave a gap.
The horizontal opening circular electric resonance ring electromagnetic metamaterial unit and the vertical opening circular electric resonance ring electromagnetic metamaterial unit are symmetrically printed on the front side and the back side of an FR4 board through a layer of metal film to form a wave absorbing layer structure. The metal films are arranged at equal intervals.
The invention has the beneficial effects that: the broadband metamaterial wave absorber effectively eliminates reflected waves and clutter formed between an electronic warfare test antenna and an electronic warfare radome under the frequency of 20-40 Ghz. The data of the wave transmission rate of the electronic warfare radome is reduced, the test data are more accurate and reliable, and the electrical property of the radome can be more accurately reflected.
Drawings
FIG. 1 is a schematic composition diagram of the present invention;
FIG. 2 is a composition diagram of a wave-absorbing structural layer in the present invention;
FIG. 3 is a schematic diagram of a horizontal open circular electrical resonant ring electromagnetic metamaterial unit;
FIG. 4 is a schematic diagram of a vertical open circular electrical resonant ring electromagnetic metamaterial unit;
FIG. 5 is a graph showing the results of the example.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
Referring to fig. 1, a broadband metamaterial wave absorber is arranged between a tool for installing a test antenna and the test antenna, the length of the broadband metamaterial wave absorber is the length of a radome, the width of the broadband metamaterial wave absorber is the width of the radome, and the thickness of the broadband metamaterial wave absorber is a quarter wavelength of a frequency difference between a test starting frequency and a test ending frequency;
referring to fig. 2, the wave-absorbing structure body is formed by adding 3 layers of wave-absorbing layers with the same wave-absorbing structure, wherein the wave-absorbing layer is formed by alternately arranging 2 wave-absorbing structure units of a horizontal opening circular electric resonant ring electromagnetic metamaterial unit and a vertical opening circular electric resonant ring electromagnetic metamaterial unit;
referring to fig. 3, the horizontal open circular electric resonant ring electromagnetic metamaterial unit is symmetrically printed on the front and back sides of an FR4 board through a metal film;
referring to fig. 4, the vertical open circular electrical resonant ring electromagnetic metamaterial unit is symmetrically printed on the front and back sides of an FR4 board through a metal film.
Examples
The broadband metamaterial wave absorber is arranged between a tool for mounting a test antenna and the test antenna, the frequency is set to be 20-40 Ghz, the azimuth angle of the rotary table is set to be-60 degrees, and the angle interval is 1 degree. And carrying out the empty platform test. After the electronic warfare radome is worn, carrying out a radome test, and calculating the wave transmission rate of the radome at each angle; the effect is shown in figure 5.
Claims (2)
1. The utility model provides a solve super hundred wave-absorbing structure of electron war antenna house test wave transmissivity which characterized in that: the broadband metamaterial wave absorber is arranged between a tool for installing a test antenna and the test antenna, the broadband metamaterial wave absorber is long and wide, the width of the radome is wide, the thickness of the broadband metamaterial wave absorber is a quarter wavelength of a frequency difference between a test starting frequency and a test stopping frequency, the broadband metamaterial wave absorber is formed by overlapping 3 wave absorbing layers, the wave absorbing layers are identical in structure, each wave absorbing layer is formed by arranging a plurality of longitudinally-arranged horizontal opening circular electric resonance ring electromagnetic metamaterial units and a plurality of longitudinally-arranged vertical opening circular electric resonance ring electromagnetic metamaterial units in a staggered mode, the horizontal opening circular electric resonance ring electromagnetic metamaterial units and the vertical opening circular electric resonance ring electromagnetic metamaterial units are symmetrically printed on the front surface and the back surface of an FR4 board through metal films, and the horizontal opening circular electric resonance ring electromagnetic metamaterial units are composed of two metal films which are in a shape like a Chinese character 'shan' and are symmetrically arranged up and down, the middle vertical edges of the two L-shaped metal films are connected into a whole, the ends of the vertical edges at two sides are parallel to each other and are spaced, the vertical opening circular electric resonance ring electromagnetic metamaterial unit consists of two L-shaped metal films which are symmetrically arranged at left and right, the middle vertical edges of the two L-shaped metal films are connected into a whole, and the ends of the vertical edges at two sides are parallel to each other and are provided with gaps; the metal films are arranged at equal intervals.
2. The absorbing structure of claim 1, wherein: the electromagnetic metamaterial unit of the horizontal opening circular electric resonant ring and the electromagnetic metamaterial unit of the vertical opening circular electric resonant ring have the same specification and are arranged regularly and equidistantly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810742905.4A CN110690578B (en) | 2018-07-06 | 2018-07-06 | Wave absorbing structure for solving problem that wave transmittance of antenna housing test for electronic warfare exceeds hundred |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810742905.4A CN110690578B (en) | 2018-07-06 | 2018-07-06 | Wave absorbing structure for solving problem that wave transmittance of antenna housing test for electronic warfare exceeds hundred |
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| Publication Number | Publication Date |
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| CN110690578A CN110690578A (en) | 2020-01-14 |
| CN110690578B true CN110690578B (en) | 2021-04-20 |
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| CN201810742905.4A Active CN110690578B (en) | 2018-07-06 | 2018-07-06 | Wave absorbing structure for solving problem that wave transmittance of antenna housing test for electronic warfare exceeds hundred |
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| CN111983574B (en) * | 2020-07-31 | 2024-04-09 | 中国航空工业集团公司济南特种结构研究所 | Method for improving performance of RCS test dead zone |
| CN114336070A (en) * | 2021-12-10 | 2022-04-12 | 重庆邮电大学 | Miniature broadband metamaterial wave absorber |
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