CN209607914U - A kind of frequency-selective surfaces periodic unit - Google Patents
A kind of frequency-selective surfaces periodic unit Download PDFInfo
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- CN209607914U CN209607914U CN201920598754.XU CN201920598754U CN209607914U CN 209607914 U CN209607914 U CN 209607914U CN 201920598754 U CN201920598754 U CN 201920598754U CN 209607914 U CN209607914 U CN 209607914U
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Abstract
The utility model relates to electromagnetic wave technology field, especially a kind of frequency-selective surfaces particularly provide a kind of frequency-selective surfaces periodic unit.The frequency-selective surfaces periodic unit includes the first metal layer stacked gradually, first medium layer, second metal layer, second dielectric layer and third metal layer, the first metal layer and third metal layer are square structure, the second metal layer is cross-shaped structure, the first medium layer and second dielectric layer are square structure, the first metal layer, second metal layer and third metal layer with a thickness of 200~1000nm, the first medium layer and second dielectric layer with a thickness of 155~165 μm.The utility model realizes the characteristics such as highly transmissive in 75~105GHz, and with good stability.
Description
Technical field:
The utility model relates to electromagnetic wave technology field, especially a kind of frequency-selective surfaces particularly provide a kind of frequency
Rate selects surface period unit.
Background technique:
Frequency-selective surfaces (frequencyselectivesurface-FSS), referred to as FSS are a kind of weeks of multidimensional
Phase property structure, this selection structure has good selectivity the transmission and reflection of electromagnetic wave, in its bandpass range, electromagnetism
Wave can pass through FSS structure, and in its band resistance range, electromagnetic wave is then reflected back completely, by periodical knot
The adjustment of structure, design, available different band logical and with resistance range.Structurally, FSS structure is by several
A kind of periodic structure that FSS unit is formed by different permutation and combination, if the resonance of the frequency of electromagnetic wave and FSS unit frequency
Rate is identical, and total transmissivity or total reflection characteristic can be presented in FSS, and total reflection characteristic, aperture type is presented in the in general FSS of patch-type
FSS present total transmissivity characteristic.Frequency-selective surfaces are equivalent to the effect of a spatial filter, therefore it is widely used in light
Road system, the stealth material of aircraft or subreflector of radar etc..
Using the frequency selective characteristic of FSS, it can be designed that the microwave devices such as filter, and with material science and technology
With the rapid development of processing skill, the development of FSS is very fast, such as patent CN201711230299.X discloses a kind of be applicable in
Surface is selected in the active frequencies of electromagnetic switch, includes medium substrate, multiple first layer structural units and the first layer structure
The identical second layer structural unit of unit number, multiple first layer structural units and second layer structural unit are periodical respectively
It is arranged on the upper surface and lower surface of the medium substrate, the first layer structural unit wraps respectively with second layer structural unit
Multiple metal patches are included, the both ends of each metal patch are respectively equipped with metal throuth hole, are used to be connected to the first layer
The metal patch in metal patch and the second layer structural unit in structural unit, each metal patch are equipped with one
Gap, each gap location is managed equipped with a PIN, along the medium substrate on the upper surface or lower surface of the medium substrate
Edge is equipped with the edge feeder line being biased to each PIN pipe；In another example patent CN201810968674.9 discloses one kind
Novel multiband frequency selects surface cell comprising Waveguide Grid and oscillator structure, oscillator structure is by four E type oscillator groups
At four E type oscillators are set in Waveguide Grid, and four E type oscillators are simultaneously symmetrically arranged centered on Waveguide Grid center line
Column, each E type oscillator include the first outside oscillator, the second outside oscillator, center oscillator and linking arm, and each E type oscillator passes through
The end of center oscillator wave guide wall corresponding with Waveguide Grid is connected, the first outside oscillator and the second outside oscillator difference
The outside of two-way opening rectangular waveguide structure in Waveguide Grid, the first outside oscillator, the second outside oscillator and center oscillator
It is connected with linking arm, linking arm is parallel with wave guide wall, and the first outside oscillator, the second outside oscillator and center oscillator are mutually flat
Row；Disclose a kind of load lamped element frequency-selective surfaces there are also patent CN201810747997.5, including medium substrate and
It is tightly attached to inner metal patch, the outer ring metal patch of medium substrate upper surface, inner metal patch includes four first L-type gold
Belong to patch, side is vertical and side length is equal by two of each first L-type metal patch, two neighboring first L-type metal patch there are
Gap, each gap setting have first lumped inductance, and four the first L-type metal patches surround square-shaped metal ring, outer ring
Metal patch includes four second L-type metal patches, and two sides of each second L-type metal patch are vertical and side length is equal, phase
Adjacent two the second L-type metal patches are there are gap, and the adjacent gap setting of two of them has lumped capacity, other two is adjacent
Gap setting has the second lumped inductance, and four the second L-type metal patches surround square golden ring；These existing FSS, which exist, to be wanted
It is that volume is big, is not easy to conformal or is exactly to inhale the disadvantages of wavestrip width is small, practicability is not high.
Utility model content:
Technical problem to be solved in the utility model be for existing frequency-selective surfaces exist be not easy to it is conformal or
The disadvantages of practicability is not high provides a kind of frequency-selective surfaces periodic unit.
To achieve the above objectives, the present invention adopts the following technical solutions: a kind of frequency-selective surfaces periodic unit,
It is characterized in that: including the first metal layer, first medium layer, second metal layer, second dielectric layer and the third metal stacked gradually
Layer, the first metal layer and third metal layer are square structure, and the second metal layer is cross-shaped structure, and described first
Dielectric layer and second dielectric layer are square structure, the first metal layer, second metal layer and third metal layer with a thickness of
200~1000nm, the first medium layer and second dielectric layer with a thickness of 155~165 μm.
Preferably, the first metal layer, second metal layer and third metal layer are layer gold, the first medium layer and the
Second medium layer is quartz layer.
Preferably, the side length of the first metal layer and third metal layer is equal, the first medium layer and second medium
The side length of layer is equal, and the length of the cross-shaped structure of the second metal layer is equal with the side length of the first medium layer.
Preferably, four sides of the first metal layer and third metal layer respectively with the first medium layer and second medium
Layer four Bian Pinghang, the cross-shaped structure of the second metal layer on one side with the first medium layer while it is parallel.
Preferably, the side length of the first metal layer and third metal layer is 335~345 μm.
Preferably, the side length of the first medium layer and second dielectric layer is 400 μm.
Preferably, the width of the cross-shaped structure of the second metal layer is 28~32 μm.
The utility model has the following beneficial effects: due to taking above-mentioned technical proposal
A kind of frequency-selective surfaces periodic unit described in the utility model, is capable of forming resonance frequency in 75~105GHz
Frequency range, -2dB bandwidth are about 30GHz, and transmissivity basically reaches 100% frequency-selective surfaces, realizes in 75~105GHz
The characteristics such as highly transmissive, and it is with good stability.
Detailed description of the invention:
Fig. 1 is a kind of structural schematic diagram of frequency-selective surfaces periodic unit described in the utility model；
Fig. 2 is the schematic top plan view of the first metal layer described in the utility model and first medium layer；
Fig. 3 is the schematic top plan view of second metal layer described in the utility model and second dielectric layer；
Fig. 4 is the schematic top plan view of third metal layer and second dielectric layer described in the utility model；
Fig. 5 is the structural schematic diagram of one embodiment of frequency-selective surfaces described in the utility model；
Fig. 6 is the transfer curve of the electromagnetic wave normal incidence of frequency-selective surfaces described in the utility model.
Specific embodiment:
It is described further below in conjunction with content of the attached drawing to the utility model.
As shown in Figure 1, a kind of frequency-selective surfaces periodic unit described in the utility model, including stack gradually first
Metal layer 1, first medium layer 2, second metal layer 3, second dielectric layer 4 and third metal layer 5, the first metal layer 1, second
Metal layer 3 and third metal layer 5 with a thickness of 200~1000nm, the first medium layer 2 and second dielectric layer 4 with a thickness of
155~165 μm, such as 160 μm.Preferably, the first metal layer 1, second metal layer 3 and third metal layer 5 are layer gold, institute
It states first medium layer 2 and second dielectric layer 4 is quartz layer；More specifically, the material that the quartz layer uses is for dielectric constant
3.75 quartz.
As shown in Figure 2, Figure 3 and Figure 4, the first metal layer 1 and third metal layer 5 are square structure, and described second
Metal layer 3 is cross-shaped structure, and the first medium layer 2 and second dielectric layer 4 are square structure；Preferably, described first
Metal layer 1 is equal with the side length of third metal layer 5, and the first medium layer 2 is equal with the side length of second dielectric layer 4, and described
The length of the cross-shaped structure of two metal layers 3 is equal with the side length of the first medium layer 2；Meanwhile 1 He of the first metal layer
Four sides of third metal layer 5, four Bian Pinghang with the first medium layer 2 and second dielectric layer 4 respectively, the second metal layer 3
Cross-shaped structure on one side with the first medium layer 2 while it is parallel；Specifically, the first metal layer 1 and third gold
The side length for belonging to layer 5 is 335~345 μm, such as 340 μm, the side length of the first medium layer 2 and second dielectric layer 4 is 400 μm,
The width of the cross-shaped structure of the second metal layer 3 is 28~32 μm, such as 30 μm.
As shown in figure 5, frequency-selective surfaces periodic unit described in the utility model is according to 400 microns of the period where it
Two-dimensional array is arranged in plane, to form the frequency-selective surfaces shown in Fig. 5.Electromagnetic wave is carried out to the frequency-selective surfaces
The measuring transmission loss of normal incidence, as a result as described in Figure 6, what frequency-selective surfaces periodic unit described in the utility model was formed
Frequency-selective surfaces realize resonance frequency in 75~105GHz frequency range, and -2dB bandwidth is about 30GHz, and transmissivity basically reaches
100%.
The above content is to a kind of frequency-selective surfaces periodic unit described in the utility model make it is further in detail
Illustrate, not the scope of the utility model is defined, without departing from the concept of the premise utility, this field is common
The various changes and improvements that technical staff makes according to the technical solution of the utility model, are regarded as belonging to the utility model
Protection scope.
Claims (7)
1. a kind of frequency-selective surfaces periodic unit, it is characterised in that: including the first metal layer, the first medium stacked gradually
Layer, second metal layer, second dielectric layer and third metal layer, the first metal layer and third metal layer are square structure,
The second metal layer is cross-shaped structure, and the first medium layer and second dielectric layer are square structure, first gold medal
Belong to layer, second metal layer and third metal layer with a thickness of 200~1000nm, the thickness of the first medium layer and second dielectric layer
Degree is 155~165 μm.
2. frequency-selective surfaces periodic unit according to claim 1, it is characterised in that: the first metal layer, second
Metal layer and third metal layer are layer gold, and the first medium layer and second dielectric layer are quartz layer.
3. frequency-selective surfaces periodic unit according to claim 1, it is characterised in that: the first metal layer and third
The side length of metal layer is equal, and the side length of the first medium layer and second dielectric layer is equal, the cross of the second metal layer
The length of structure is equal with the side length of the first medium layer.
4. frequency-selective surfaces periodic unit according to claim 1, it is characterised in that: the first metal layer and third
Four sides of metal layer, four Bian Pinghang with the first medium layer and second dielectric layer respectively, the cross of the second metal layer
Structure on one side with the first medium layer while it is parallel.
5. frequency-selective surfaces periodic unit according to claim 1, it is characterised in that: the first metal layer and third
The side length of metal layer is 335~345 μm.
6. frequency-selective surfaces periodic unit according to claim 1, it is characterised in that: the first medium layer and second
The side length of dielectric layer is 400 μm.
7. frequency-selective surfaces periodic unit according to claim 1, it is characterised in that: the cross of the second metal layer
The width of shape structure is 28~32 μm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803171A (en) * | 2019-11-14 | 2021-05-14 | 南京理工大学 | Electromagnetic lens with miniaturized frequency selective surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803171A (en) * | 2019-11-14 | 2021-05-14 | 南京理工大学 | Electromagnetic lens with miniaturized frequency selective surface |
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