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Frequency reconfigurable antenna based on mechanical type movement

A reconfigurable antenna, mechanical technology, applied to the antenna, the device that enables the antenna to work in different bands at the same time, the structural form of the radiating element, etc., to achieve the effect of high directivity

Inactive Publication Date: 2011-08-17
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a frequency reconfigurable antenna based on mechanical movement, which uses the direction of mechanical movement to adjust Change the resonant frequency of the antenna, and then get an antenna that works at multiple discrete frequency points. If the antenna operating frequency is selected to be within the near-zero refractive index frequency band of the material, a highly directional frequency reconfigurable antenna can be obtained.

Method used

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  • Frequency reconfigurable antenna based on mechanical type movement
  • Frequency reconfigurable antenna based on mechanical type movement

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Embodiment 1

[0032] Such as figure 1 Shown, the present invention realizes as follows:

[0033] (1) The operating frequency range of the antenna is selected to be 12GHz-18GHz, and the corresponding center wavelength is 20mm.

[0034] (2) The metal material is selected as copper, and the unit structure is a square structure, such as figure 2 . When the relative displacement of the front and rear two layers of materials is selected as 0, the geometric parameters such as the appropriate unit period, metal line width and thickness are determined through simulation, so that the corresponding refractive index of the material at 18GH is between 0.1-0.5. The simulation can be simulated by the HFSS software of Ansoft Company, and the electromagnetic scattering parameters of the unit are calculated first. Then extract the equivalent refractive index of the scattering parameter reduction unit. The finally optimized unit period a=5.85mm, metal line width w=0.85mm, and metal h=0.2mm.

[0035] (3)...

Embodiment 2

[0041] (1) The operating frequency range of the antenna is selected as X-band, the frequency range is 8-12GHz, and the center wavelength is 30mm.

[0042] (2) The metal material is selected as metal aluminum, and the unit structure is also a square structure. When there is no offset, in order to make the material at 11.5GH, the corresponding refractive index is between 0.1-0.5. The finally optimized unit period a=7.6mm, metal line width w=0.9mm, metal h=0.24mm.

[0043] (3) Select two layers of materials, the interval between the metal grids is 6.9mm, and the foam material with a dielectric constant of 1.08 is filled between the metal grid intervals.

[0044](4) When there is no relative movement between the two layers of metal grids, the simulation is carried out by HFSS software and the equivalent refractive index is restored: when the frequency is 11.5GHz, the corresponding real part of the refractive index is 0.15, which is a low-refractive material .

[0045] (5) Perio...

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Abstract

The invention relates to a frequency reconfigurable antenna based on mechanical type movement. The antenna is obtained by the following steps of: (1) initially confirming the working frequency range of the antenna; (2) confirming that the shape of an artificial structure material metal structure is a metal fishing net structure; (3) confirming geometric parameters, such as artificial structure material unit cycle, metal material, substrate material, metal structure size, substrate size, and the like; (4) folding a well-shaped material into two layers in the front and at the back; (5) when two layers of front and back metal structures do not generate relative displacement, carrying out numerical simulation on two front and back unit structures by utilizing electromagnetic simulation software and reducing the equivalent refractive index of the material according to the calculated S parameter and utilizing a reducing program; (6) when two layers of front and back materials generate relative movement in parallel, recording the S parameter and reducing the refractive index; (7) selecting a frequency point of which the refractive index is similar to zero as working frequency according to S parameter reducing refractive index of unit stimulation; and (8) carrying out cycle arrangement on the designed artificial structure material unit in a two-dimensional plane for assembling the antenna. A high-directivity frequency reconfigurable antenna can be obtained through the invention.

Description

technical field [0001] The invention relates to an antenna design method, in particular to a novel antenna design method based on mechanical movement and reconfigurable working frequency. Background technique [0002] Since the pioneering research work of British scientist Pendry and American scientist Smith on artificial materials, artificial structural materials with negative permittivity and negative magnetic permeability have attracted a large number of researchers' research interests. Because of the unique electromagnetic properties of artificial structure materials (negative refractive index, low refractive index, high refractive index) and other characteristics, artificial structure materials have great potential application value in the microwave band. Therefore, scientists have designed a wide variety of electromagnetic resonators. They are all similar to a combination of split rings and metal breaks, such as S-type, Ω-type, and H-type resonators. A lot of attract...

Claims

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Application Information

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IPC IPC(8): H01Q5/00H01Q1/36H01Q1/38
Inventor 杜春雷王义富董小春袁桂山史立芳
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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