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Active frequency selection surface with broadband and angle stability

A frequency selective surface and angle technology, which is applied in the microwave field, can solve the problems of limiting the use occasion and practicability of the frequency selective surface, the inability to take into account the angle stability, and the influence of the performance of the frequency selective surface, etc., to achieve simple and easy processing and structure The Effects of Simplicity, Reduced Complexity and Cost

Inactive Publication Date: 2017-09-08
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] With the improvement of communication system requirements for the use of frequency selective surfaces, although there are many technical means to achieve good bandwidth of active frequency selective surfaces, these methods often cannot take into account the angular stability while achieving good bandwidth. When the direction of the incoming wave changes, the performance of the frequency selective surface will also be affected, which greatly limits the application occasions and practicability of the frequency selective surface

Method used

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  • Active frequency selection surface with broadband and angle stability
  • Active frequency selection surface with broadband and angle stability
  • Active frequency selection surface with broadband and angle stability

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Reference figure 1 with figure 2 , The present invention includes:

[0021] Periodic surface 1 and dielectric substrate 2. Periodic surface 1 is located on the upper surface of dielectric substrate 2. It consists of M×N square active resonant units 11 with side length p=20mm arranged periodically with side length p, where M =15, N=15, the relative permittivity of the dielectric substrate 2 ε'= 2.20, the electrical loss tangent tanδ D = 0.0007, thickness t = 0.8mm.

[0022] Each active resonant unit 11 is composed of a circular patch 111, a deformed X-shaped patch 112, and a varactor 113. The circular patch 111 and the deformed X-shaped patch 112 are located at the center, and the circular patch 111 It coincides with the center point of the deformed X-shaped patch 112, and each of the four ends of the deformed X-shaped patch 112 is connected to a varactor 113. The radius of the circular patch 111 is r=1 mm.

[0023] Reference image 3 , The deformed X-shaped patch 112 is comp...

Embodiment 2

[0026] The structure of this embodiment is the same as that of embodiment 1, and only the following parameters are adjusted:

[0027] The thickness of the dielectric substrate 2 is t=0.75mm, the length of the first straight section A is k=3.4mm, and the width w=0.5mm; the opening angle of the fan-shaped hairpin line is θ=60 ° , The bending angle is β=175°, the width of the fan-shaped hairpin line w1=0.4mm, the bending interval of the fan-shaped hairpin line dr=0.2mm; the length of the second straight line segment B k1=0.7mm, the width is the same as the first straight line segment A Same; the capacitance of the varactor is 0.1pf~1.0pf, the change step is 0.15pf, the length g=0.8mm, and the width w2=0.4mm.

Embodiment 3

[0029] The structure of this embodiment is the same as that of embodiment 1, and only the following parameters are adjusted:

[0030] The thickness of the dielectric substrate 2 is t = 1.05 mm, the length of the first straight line A is k = 3.6 mm, and the width w = 0.7 mm; the opening angle of the fan-shaped hairpin line is θ = 65°, the bending angle is β = 185°, the fan-shaped hairpin The width of the line w1=0.6mm, the bending interval of the fan-shaped hairpin line dr=0.4mm; the length of the second straight section B k1=1.1mm, the width is the same as the first straight section A; the capacitance of the varactor diode is 0.1pf~ 1.0pf, change step is 0.45pf, length g=1.2mm, width w2=0.6mm.

[0031] The technical effects of the present invention will be further described below in combination with the simulation results:

[0032] Simulation 1, based on the commercial simulation software HFSS_16.0 to simulate the transmission coefficient of the above embodiment 1, the results are a...

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Abstract

The invention discloses an active frequency selection surface with broadband and angle stability, and mainly aims to solve the problem that the existing frequency selection surface cannot take both of broadband and angle into consideration at the same time. The active frequency selection surface with broadband and angle stability comprises a periodical surface (1) and a dielectric substrate (2); the periodical surface is printed on the upper surface of the dielectric substrate, and is formed by M*N active resonant units (11) in periodical arrangement; each active resonant unit consists of a circular patch (111), a deformation X-shaped patch (112) and a variode (113); the circular patch and the deformation X-shaped patch are crossed in a central position and the geometrical central points of the two patches coincide; each deformation X-shaped patch consists of four branches; each branch consists of a first linear section, a fan-shaped clamping line and a second linear section connected in sequence; one ends of the four branches coincide in one point and in X-shaped distribution; and one end of each second linear section C is connected with the corresponding variode. The active frequency selection surface has high broadband and angle stability, and can be used for a reflector antenna and satellite communication.

Description

Technical field [0001] The invention belongs to the field of microwave technology, and relates to an active frequency selection surface, which can be used in many scenarios where the broadband and angular stability of the frequency selection surface are strictly required, such as reflector antennas and satellite communications. Background technique [0002] The frequency selective surface FSS is a two-dimensional periodic array structure. FSS itself does not absorb energy, but can effectively control the transmission and reflection of incident electromagnetic waves, so it can be regarded as a spatial filter. The frequency selective surface FSS has the characteristic of filtering electromagnetic waves according to frequency characteristics due to its different reflection ability to electromagnetic waves of different frequencies, thus playing an important role in the fields of electromagnetic compatibility, communication and navigation. [0003] Once the passive frequency selection ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20
CPCH01P1/20
Inventor 姜文张坤哲洪涛曹先博龚书喜
Owner XIDIAN UNIV
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