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Double-layer frequency selection surface wave filter with frequency conversation function

A frequency selective surface and filter technology, applied in the microwave field, can solve the problems of not being able to shield, lose the stealth function, and the shielding room cannot choose different passband ranges, so as to achieve convenient operation, simple structure, and improve practical applicability and reliability. Effect

Inactive Publication Date: 2013-05-08
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] But when the above products are prepared, the band-pass filtering characteristics realized by FSS cannot be changed.
For the hybrid radome, frequency conversion radar cannot be used due to its single-passband characteristics. If the frequency band of the enemy's detection radar is the same as that of the own guidance radar, the stealth function will be lost due to the inability to shield the electromagnetic waves in this frequency band; when the feed source of the Cassegrain system When the frequency changes, the dichroic sub-reflector cannot be dynamically adjusted according to the change of the feed frequency; and the traditional shielding room cannot select different passband ranges according to actual needs
These limitations make it difficult for FSS as a spatial filter to meet the actual needs in the application

Method used

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  • Double-layer frequency selection surface wave filter with frequency conversation function
  • Double-layer frequency selection surface wave filter with frequency conversation function

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specific Embodiment approach 1

[0011] Specific implementation mode 1. Combination figure 1 Description of this embodiment, a double-layer frequency selective surface filter with frequency conversion function, including a frequency selective surface base layer 1, a frequency selective surface metal layer 2, a BST interlayer 3, a wire 4 and a voltage source 5; the BST interlayer 3 and the two The frequency selective surface metal layer 2 on the side is in close contact, and the frequency selective surface metal layer 2 is in close contact with the frequency selective surface base layer 1; the DC voltage source 5 is connected to the metal part of the frequency selective surface metal layer 2 through a wire 4.

[0012] The manufacturing method of the BST interlayer described in the present embodiment is:

[0013] Step 1, adding barium acetate, strontium acetate and titanium isopropoxide into acetic acid solution to dissolve respectively; mixing the three dissolved solutions to obtain barium strontium titanate s...

specific Embodiment approach 2

[0015] Specific embodiment two, combine figure 1 and figure 2 Describe this embodiment mode, this embodiment mode is the manufacturing method of a kind of double-layer frequency selective surface filter with frequency conversion function described in specific embodiment one, the BST material molecular formula required in this implementation is Ba 0.6 Sr 0.4 TiO 3 , according to the ratio relationship between the elements to prepare the amount of raw materials, including barium acetate, strontium acetate and titanium isopropoxide. Add barium acetate into the acetic acid solution, keep at 60°C for five minutes, then the barium acetate dissolves, add strontium acetate into the acetic acid solution, keep at 120°C for ten minutes, then dissolve the strontium acetate, add titanium isopropoxide to the acetic acid solution , and mix the three solutions to finally form a BST material; use the spin coating method to prepare the BST film, first introduce an appropriate amount of solu...

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Abstract

The invention discloses a double-layer frequency selection surface wave filter with a frequency conversation function and relates to the technical field of microwaves. The problem that band pass wave filtering characteristics achieved by using a fixed satellite service (FSS) can not be changed in the prior art is solved. A high Q value characteristic of the wave filter is achieved through the adoption of a double-layer frequency selection surface. Ferroelectric material barium strontium titanate (BST) thin film is adopted as an interlayer of the double-layer frequency selection surface, metal layers of the double-layer frequency selection surface are adopted as a positive electrode of the BST interlayer and a negative electrode of the BST interlayer, different voltages are applied on the BST thin film through direct current voltage source, relative dielectric constant of the BST thin film is enabled to change along with change of the voltage, and therefore the frequency conversation function of the wave filter is achieved.

Description

technical field [0001] The invention relates to the field of microwave technology, in particular to a double-layer frequency selective surface filter with frequency conversion function. Background technique [0002] Frequency Selective Surface (FSS) is a two-dimensional periodic array structure composed of periodically arranged metal patch units or periodically arranged opening units on a metal screen, which can make electromagnetic waves at the resonant frequency Total reflection or total transmission occurs, so it is a spatial filter that has a selective effect on the frequency of electromagnetic waves. [0003] As a spatial filter, FSS has a wide range of applications in the microwave field. For example, FSS technology is used to prepare hybrid radomes, which can reduce the out-of-band radar scattering cross-section of flying weapon guidance antennas, thereby enhancing its defense penetration capabilities; FSS filtering characteristics are used to prepare dichroic sub-re...

Claims

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Application Information

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IPC IPC(8): H01P1/20H01P11/00
Inventor 高劲松陈新徐念喜方春易
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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