CN106876975A - A kind of individual layer double frequency assembled unit and the frequency-selective surfaces containing the unit - Google Patents
A kind of individual layer double frequency assembled unit and the frequency-selective surfaces containing the unit Download PDFInfo
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- CN106876975A CN106876975A CN201710124027.5A CN201710124027A CN106876975A CN 106876975 A CN106876975 A CN 106876975A CN 201710124027 A CN201710124027 A CN 201710124027A CN 106876975 A CN106876975 A CN 106876975A
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- frequency
- square
- individual layer
- layer double
- double frequency
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
Abstract
A kind of individual layer double frequency assembled unit and the frequency-selective surfaces containing the unit, are related to frequency selecting surface technique field.The present invention is to solve the problems, such as existing double frequency frequency-selective surfaces complex structure, making debugging difficulty.A kind of individual layer double frequency assembled unit of the present invention is rearranged by 4 square loops and cross oscillator, will obtain double frequency-band frequency selective characteristic.A kind of frequency-selective surfaces containing individual layer double frequency assembled unit, by multiple individual layer double frequency assembled units, close-packed arrays are constituted each other, and different incidence angles during for vertical polarization and horizontal polarization have good stability.The present invention can be applied to dual frequency equipment.
Description
Technical field
The invention belongs to frequency selecting surface technique field.
Background technology
Frequency-selective surfaces are a kind of two-dimensionally periodic structures that selection can be carried out to the frequency of electromagnetic wave, this structure by
Medium substrate and metal periodic structure layer composition, frequency selective characteristic are set up on its periodic structure.
With science and technology and expanding economy, the anti-electromagnetism of electromagnetic transmission, precision instrument between various information equipments is done
Disturb, human body anti-electromagnetic radiation etc. is required to realize electromagnetic signal transmission control or absorption loss.With band logical or band-stop response
Frequency-selective surfaces be widely used to the multiple fields such as communication, radar, electromagnetic compatibility.The design of novel cycle unit with should
With the development trend for being frequency-selective surfaces.Conventional frequency-selective surfaces such as crossed dipoles or Y-shaped structure only have one it is humorous
Vibration frequency, it is impossible to meet two-frequency operation characteristic.
In order to be applied to dual frequency equipment, double frequency frequency-selective surfaces are had begun working in recent years.It is existing at present several
Plant the method for obtaining dual-band characteristic, the multilayered cylindrical shell such as comprising model identical or complement mode, it is possible to obtain multiple
Resonant frequency.Another kind realizes that the method for multi resonant vibration frequency is that, using point shape unit, some helical structures can be produced in multiple
Frequency of heart.Existing double frequency frequency-selective surfaces are generally multi-layer compound structure, are lacked with complex structure, making debugging difficulty etc.
Point.
The content of the invention
The present invention is to solve the problems, such as existing double frequency frequency-selective surfaces complex structure, making debugging difficulty, now
A kind of individual layer double frequency assembled unit and the frequency-selective surfaces containing the unit are provided.
A kind of individual layer double frequency assembled unit includes：Substrate 1, cross oscillator 2 and 4 square loops 3；
The upper surface of substrate 1 is square, and cross oscillator 2 and 4 square loops 3 are each attached to the upper surface of substrate 1,
Four tunnel branches of cross oscillator 2 are overlapped with two center lines of substrate 1 respectively, and substrate 1 is divided into four
Part,
4 square loops 3 are located at tetrameric center on substrate 1 respectively, and square loop 3 includes end to end four
Side, square loop 3 while with substrate 1 while be parallel to each other, each edge includes two square recesses 4, and the width of square recess 4 is small
In the distance between two square recesses 4, place side is divided into three sections by two square recesses 4.
The length of side D of substrate 1 is 14.1-14.6mm.
Cross oscillator 2 includes two list structures, and two list structures are arranged in a mutually vertical manner, and midpoint is intersecting, often
The length L2 of individual list structure is 13-13.5mm, and width W2 is 0.2-0.4mm.
The length of side L1 of square loop 3 be 5.8-6.2mm, width W1 be 0.2-0.4mm, between two square recesses 4 away from
It is 1-1.5mm from S2, the width S 3 of square recess 4 is 0.2-0.4mm, and the depth D1 of square recess 4 is 0.8-1mm.
The distance between cross oscillator 2 and square loop 3 S4 are 0.4-0.6mm.
Frequency-selective surfaces containing above-mentioned individual layer double frequency assembled unit, including multiple individual layer double frequency assembled units, it is multiple
Individual layer double frequency assembled unit close-packed arrays each other.
A kind of individual layer double frequency assembled unit of the present invention, a kind of individual layer double frequency assembled unit by 4 square loops with
Crossed dipoles is rearranged, and will obtain dual-band performance.In order to increase its electrical length so that it is in the relatively low of same size
Operation at frequencies, is folded in each edge of square loop its inside, that is, constitute square recess.When physical dimension reduces
When, polarizer stability is accordingly improved.
The present invention tests working frequency and contains a kind of double frequency of individual layer double frequency assembled unit for 6.3GHz and 8.0GHz
Band resistance frequency-selective surfaces, the Double-frequency band elimination frequency-selective surfaces are closely arranged each other by multiple individual layer double frequency assembled units
Row composition, has good stability for different polarization and incidence angle.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the individual layer double frequency assembled unit described in specific embodiment one；
Fig. 2 is to contain a kind of artificial transmission charts for finned heat of the frequency-selective surfaces of individual layer double frequency assembled unit；
Fig. 3 is a kind of equivalent circuit diagram of individual layer double frequency assembled unit；
Fig. 4 is a kind of CURRENT DISTRIBUTION schematic diagram of individual layer double frequency assembled unit；
Fig. 5 is change curve of the transmission coefficient with cross oscillator length；
Fig. 6 is the transmission coefficient curve map that measurement is obtained；
Fig. 7 is to contain a kind of structure of the frequency-selective surfaces of individual layer double frequency assembled unit described in specific embodiment three
Schematic diagram.
Specific embodiment
Specific embodiment one：Reference picture 1 illustrates present embodiment, a kind of individual layer double frequency described in present embodiment
Assembled unit, including：Substrate 1, cross oscillator 2 and 4 square loops 3；
The upper surface of substrate 1 is square, and cross oscillator 2 and 4 square loops 3 are each attached to the upper surface of substrate 1,
Four tunnel branches of cross oscillator 2 are overlapped with two center lines of substrate 1 respectively, and substrate 1 is divided into four
Part,
4 square loops 3 are located at tetrameric center on substrate 1 respectively, and square loop 3 includes end to end four
Side, square loop 3 while with substrate 1 while be parallel to each other, each edge includes two square recesses 4, and the width of square recess 4 is small
In the distance between two square recesses 4, place side is divided into three sections by two square recesses 4.
A kind of individual layer double frequency assembled unit is rearranged by 4 square loops 3 and cross oscillator 2, will obtain double frequency
Band performance.In order to increase its electrical length so that it works under the lower frequency of same size, each edge of square loop 3
Its inside is folded in, that is, constitutes square recess 4.Frequency-selective surfaces are a planar structures, this planar structure be by
Periodicity metal patch on medium substrate is constituted.
Specific embodiment two：Reference picture 1 illustrates present embodiment, and present embodiment is to specific embodiment one
A kind of described individual layer double frequency assembled unit is described further, and in present embodiment, the length of side D of substrate 1 is 14.1-
14.6mm, cross oscillator 2 includes two list structures, and two list structures are arranged in a mutually vertical manner, and midpoint is intersecting, each
The length L2 of list structure is 13-13.5mm, and width W2 is 0.2-0.4mm, and the length of side L1 of square loop 3 is 5.8-6.2mm, wide
Degree W1 is 0.2-0.4mm, and the distance between two square recesses S2 is 1-1.5mm, and the width S 3 of square recess is 0.2-
0.4mm, the depth D1 of square recess is 0.8-1mm, and the distance between cross oscillator 2 and square loop 3 S4 are 0.4-
0.6mm, the distance of the outside of square recess 4 to its adjacent edge is S1mm.
Table I gives one group of dimensional parameters of preferred individual layer double frequency assembled unit, as follows：
The dimensional parameters of Table I frequency-selective surfaces
| Parameter | L1 | L2 | S1 | S2 | S3 |
| Numerical value (mm) | 6 | 13.2 | 1.2 | 1.2 | 0.3 |
| Parameter | S4 | W1 | W2 | D1 | D |
| Numerical value (mm) | 0.5 | 0.3 | 0.3 | 0.9 | 14.4 |
Frequency-selective surfaces are emulated using the parameter be given in Table I.Under different incidence angles and polarization condition
Simulation frequency response curve is as shown in Fig. 2 wherein (a) represents vertical polarization, (b) expression parallel polarization.
Frequency-selective surfaces are operated in two frequencies 6.3GHz and 8.0GHz as can see from Figure 2.In vertical polarization,
It is incident with 15 °, 30 °, 45 ° and 60 ° of angle, first resonant frequency offset by respectively 0MHz, 50MHz, 100MHz,
100MHz.Incident with 60 ° of angle in parallel polarization, second resonance frequency shift is about 100MHz.
In order to illustrate resonance mechanism, the equivalent circuit of the frequency-selective surfaces is as shown in Figure 3.
If LpIt is known, uses ωz1、ωz2And ωp2C is calculated by formula (1)-(3)p、CsAnd Ls, LpCan pass through
Iterative calculation is obtained.
ωz1、ωz2And ωp2It is the zero point and limit of equivalent circuit impedance.
ω as can be seen from Figure 2z1、ωz2And ωp2Respectively 6.3GHz, 8.0GHz and 6.7GHz (ωp1It is 0).Result is
Lp=52nH, Cp=10.5nH, Cs=0.42nH, Ls=1.1pH.
Equivalent circuit in Fig. 3 can be verified by the CURRENT DISTRIBUTION of two resonant frequencies shown in Fig. 4.
In Fig. 4 (a), CURRENT DISTRIBUTION mainly on an arm of cross oscillator and square loop two adjacent sides
On, and these constitute LpAnd LsA part.In Fig. 4 (b), electric current is distributed only on square loop, is equivalent to Ls.Due to handing over
Fork cross-shaped oscillator only influences Lp, it mainly influences first resonance frequency omegaz1.As shown in figure 4, cross oscillator is only
There is CURRENT DISTRIBUTION in one resonant frequency, and square loop has CURRENT DISTRIBUTION in two centre frequencies, therefore can draw
Conclusion：Cross oscillator mainly influences first resonant frequency.
In order to prove this conclusion, Fig. 5 give parameter L2 from 13.2mm be changed into 12.0mm and 10.8mm when frequency ring
Answer curve map.In Figure 5, first resonant frequency is significantly changed into 6.7GHz from 6.3GHz, and 7.2GHz is then changed into again.And the
Two resonant frequency changes only change to 8.1GHz from 8.0GHz, then change to 8.2GHz.Therefore it is concluded that：L2 master
Influence first resonant frequency.
Specific embodiment three：Reference picture 7 illustrates present embodiment, and present embodiment is to contain specific embodiment
A kind of frequency-selective surfaces of the individual layer double frequency assembled unit described in, in present embodiment, the frequency-selective surfaces include
Multiple individual layer double frequency assembled units, multiple individual layer double frequency assembled units close-packed arrays each other.
It is illustrated in figure 7 the frequency-selective surfaces that size is 500mm × 500mm, altogether comprising 34 × 34 units, the present invention
Individual layer Double-frequency band elimination frequency-selective surfaces be made of PCB technology.
Measurement obtain different with the horizontal polarization angle of vertical polarization as shown in Figure 6 it is incident when transmission coefficient, transmission is
Number is measured by the N5227A vector network analyzers of Agilent Technologies, and transmitting antenna and reception antenna are double ridged horns day
Line.
Claims (6)
1. a kind of individual layer double frequency assembled unit, it is characterised in that including：Substrate (1), cross oscillator (2) and 4 Q-RINGs
Road (3)；
Substrate (1) upper surface is square, and cross oscillator (2) and 4 square loops (3) are each attached to substrate (1) upper table
Face,
Four tunnel branches of cross oscillator (2) are overlapped with two center lines of substrate (1) respectively, and substrate (1) is divided into
Four parts,
4 square loops (3) are located at tetrameric center on substrate (1) respectively, and square loop (3) includes end to end four
Side, square loop (3) while with substrate (1) while be parallel to each other, each edge include two square recesses (4), square recess (4)
Width less than the distance between two square recesses (4), place side is divided into three sections by two square recesses (4).
2. a kind of individual layer double frequency assembled unit according to claim 1, it is characterised in that the length of side D of substrate (1) is
14.1-14.6mm。
3. a kind of individual layer double frequency assembled unit according to claim 1, it is characterised in that cross oscillator (2) includes
Two list structures, two list structures are arranged in a mutually vertical manner, and midpoint is intersecting, and the length L2 of each list structure is 13-
13.5mm, width W2 are 0.2-0.4mm.
4. a kind of individual layer double frequency assembled unit according to claim 1, it is characterised in that the length of side L1 of square loop (3)
It is 5.8-6.2mm, width W1 is 0.2-0.4mm, the distance between two square recesses (4) S2 is 1-1.5mm, square recess
(4) width S 3 is 0.2-0.4mm, and the depth D1 of square recess (4) is 0.8-1mm.
5. a kind of individual layer double frequency assembled unit according to claim 1, it is characterised in that cross oscillator (2) and side
The distance between shape loop (3) S4 is 0.4-0.6mm.
6. the frequency-selective surfaces of the individual layer double frequency assembled unit described in claim 1 are contained, it is characterised in that including multiple single
Layer double frequency assembled unit, multiple individual layer double frequency assembled units close-packed arrays each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710124027.5A CN106876975A (en) | 2017-03-03 | 2017-03-03 | A kind of individual layer double frequency assembled unit and the frequency-selective surfaces containing the unit |
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| CN201710124027.5A CN106876975A (en) | 2017-03-03 | 2017-03-03 | A kind of individual layer double frequency assembled unit and the frequency-selective surfaces containing the unit |
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| CN201710124027.5A Pending CN106876975A (en) | 2017-03-03 | 2017-03-03 | A kind of individual layer double frequency assembled unit and the frequency-selective surfaces containing the unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107946761A (en) * | 2017-11-03 | 2018-04-20 | 吉林化工学院 | A kind of iron-based wave-absorber based on bandpass-type frequency-selective surfaces |
| CN111009734A (en) * | 2019-10-24 | 2020-04-14 | 西安电子科技大学 | Dual-frequency FSS with closely spaced frequency response characteristics and unit structure thereof |
| US10826189B2 (en) | 2016-10-09 | 2020-11-03 | Huawei Technologies Co., Ltd. | Frequency selective surface |
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| US20070273608A1 (en) * | 2006-05-25 | 2007-11-29 | Schaffner James H | Anisotropic frequency selective ground plane for orthogonal pattern control of windshield antenna |
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| US20070273608A1 (en) * | 2006-05-25 | 2007-11-29 | Schaffner James H | Anisotropic frequency selective ground plane for orthogonal pattern control of windshield antenna |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10826189B2 (en) | 2016-10-09 | 2020-11-03 | Huawei Technologies Co., Ltd. | Frequency selective surface |
| CN107946761A (en) * | 2017-11-03 | 2018-04-20 | 吉林化工学院 | A kind of iron-based wave-absorber based on bandpass-type frequency-selective surfaces |
| CN111009734A (en) * | 2019-10-24 | 2020-04-14 | 西安电子科技大学 | Dual-frequency FSS with closely spaced frequency response characteristics and unit structure thereof |
| CN111009734B (en) * | 2019-10-24 | 2021-09-03 | 西安电子科技大学 | Dual-frequency FSS with closely spaced frequency response characteristics and unit structure thereof |
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