Double-screen frequency selective surface capable of optimizing electromagnetic transmission characteristics

A technology of frequency selective surface and transmission characteristics, applied in circuits, electrical components, radiation unit enclosures, etc., can solve problems such as deterioration of passband performance, and achieve the effects of shortened processing cycle, simple structure, and excellent frequency response characteristics

Active Publication Date: 2015-12-16
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that the passband performance of the dual-screen FSS is extremely deteriorated when it is irradiated at a large angle in the prior art, and to provide a dual-screen frequency selective surface with optimized electromagnetic transmission characteristics

Method used

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  • Double-screen frequency selective surface capable of optimizing electromagnetic transmission characteristics
  • Double-screen frequency selective surface capable of optimizing electromagnetic transmission characteristics
  • Double-screen frequency selective surface capable of optimizing electromagnetic transmission characteristics

Examples

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Embodiment 1

[0041] Assuming that the passband is 7GHz±500MHz, the 0°-70° transmittance is required to be ≥85%, the stop band is 2GHz-4GHz, and the 0°-70° reflectance is required to be ≥90%. Next, how to implement the present invention will be shown by taking the technical index requirement as an example.

[0042] According to Munk and Mittra's research on FSS theory, it can be seen that the resonance size in the FSS pattern is consistent with the working wavelength λ. In order to verify the accuracy of the method, the first frequency selective surface layer 3 and the second frequency selective surface layer 7 adopt a simple Ring gap unit, its size satisfies λ≈2π(R in +R out ), where R in is the inner radius of the ring and R out is the outer radius.

[0043] Combined with the requirements of each layer, the structure of the dual-screen frequency selective surface for optimizing the electromagnetic transmission characteristics of Design Example 1 is as follows:

[0044] The thickness ...

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Abstract

The invention discloses a double-screen frequency selective surface (FSS) capable of optimizing electromagnetic transmission characteristics, belongs to the field of microwave technology, and solves the technical problem that the passband property is extremely deteriorated when the double-screen frequency selective surface (FSS) is under large-angle irradiation in the prior art. The double-screen frequency selective surface comprises a first dielectric layer, a first adhesive layer, a first frequency selective surface layer, a second frequency selective surface layer, a fourth adhesive layer and a second dielectric layer arranged in sequence; the double-screen frequency selective surface also comprises a dielectric cylinder layer arranged between the first frequency selective surface layer and the second frequency selective surface layer; the dielectric cylinder layer comprises dielectric cylinders arranged periodically; and the two ends of the dielectric cylinders are fixed on patches in annular gap units of the first frequency selective surface layer and the second frequency selective surface layer respectively. When the double-screen frequency selective surface is under irradiation of TE 70 degrees, the passband and stop band can still keep the excellent frequency response characteristics; and in addition, the double-screen frequency selective surface is light in weight, simple in structure, low in cost and easy to process.

Description

technical field [0001] The invention relates to a double-screen frequency selective surface with optimized electromagnetic transmission characteristics, which belongs to the field of microwave technology. Background technique [0002] A radome is an enclosure used to protect the antenna or the entire microwave system from environmental influences and is widely used in wireless systems. The radome is located in the near-field region of the antenna, so it will inevitably have several adverse effects on the performance of the antenna. Therefore, when designing the structure of the radome, it is necessary to minimize its impact on the performance of the antenna and improve certain performances of the antenna. The Frequency Selective Surface (FSS) is composed of periodically arranged metal patch units or periodically arranged aperture units on a metal screen, which can exhibit total reflection (patch type) or full transmission characteristics (aperture type) near the resonant fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H01Q1/42
Inventor 徐念喜高劲松
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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