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Double-frequency-band submillimeter wave FSS (frequency selective surface) with loading fractal structure

A frequency-selective surface and sub-millimeter wave technology, which is applied to waveguide devices, electrical components, circuits, etc., can solve the problem of the absence of dual-band band-pass sub-millimeter wave spatial filters, and achieve excellent frequency selectivity and filter characteristic drift small, simple structure

Active Publication Date: 2013-06-12
NAT SPACE SCI CENT CAS
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Problems solved by technology

[0010] There is no dual-band bandpass submillimeter wave spatial filter for center frequencies of 424GHz and 556GHz in the prior art

Method used

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  • Double-frequency-band submillimeter wave FSS (frequency selective surface) with loading fractal structure
  • Double-frequency-band submillimeter wave FSS (frequency selective surface) with loading fractal structure
  • Double-frequency-band submillimeter wave FSS (frequency selective surface) with loading fractal structure

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Embodiment Construction

[0035] The present invention will be further described now in conjunction with accompanying drawing.

[0036] The frequency selective surface of the present invention has two kinds of central operating frequencies, wherein the first central operating frequency is 424GHz (O 2 absorption peak), the 3dB operating frequency band is 387-452GHz; the second central operating frequency is 556GHz (H 2 O absorption peak), the 3dB operating frequency band is 538-593GHz. figure 1 A schematic side view of the overall layered structure of the frequency selection surface of the present invention (for the convenience of illustration, the five-layer structure is separated in the right figure, and the five-layer structure is closely connected and cascaded together in practical applications, without intervals), such as this As shown in the figure, the frequency selective surface of the present invention includes in order from top to bottom: a first silicon material layer, a first metal layer, a...

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Abstract

The invention relates to a submillimeter wave FSS (frequency selective surface) with a loading fractal structure, wherein the submillimeter wave FSS has double frequency band-pass characters, the first central operating frequency is 424GHz, and the 3dB operating frequency is 387-452GHz; the second central operating frequency is 556GHz, and the 3dB operating frequency is 538-593GHz; the device is realized by an array consisting of multiple periodic resonance units, the center of each periodic resonance unit is provided with a Y-shaped three-arm seam, and one three-arm fractal seam pattern is loaded around each Y-shaped seam at every 120 degrees; and the FSS comprises a first silicon material layer, a first metal layer, a second silicon material layer, a second metal layer and a third silicon material layer, the structures of the five layers are cascaded, and the adjacent layers are tightly adhered.

Description

technical field [0001] The invention relates to the technical fields of electromagnetic fields and microwaves, in particular to a dual-band submillimeter wave frequency selective surface loaded with a fractal structure. Background technique [0002] Frequency Selective Surfaces (FSS) is usually a two-dimensional periodic structure with frequency selective properties. As a new type of frequency-selective device, it has a good transmission or suppression effect on electromagnetic waves in its working frequency band, and has the function of spatial filtering. Because it has more advantages than traditional filters in the millimeter wave band and submillimeter wave band, it is widely used in military and civilian fields. [0003] With the advancement of microwave remote sensing technology, millimeter-wave and submillimeter-wave spaceborne detection systems have become a mainstream trend, and their operating frequency is developing in the direction of terahertz. By using frequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20
Inventor 夏步刚张德海孟进黄健
Owner NAT SPACE SCI CENT CAS
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