CN110994188A - Strong coupling frequency selective surface structure insensitive to incident electromagnetic wave full angle - Google Patents

Strong coupling frequency selective surface structure insensitive to incident electromagnetic wave full angle Download PDF

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CN110994188A
CN110994188A CN201911360644.0A CN201911360644A CN110994188A CN 110994188 A CN110994188 A CN 110994188A CN 201911360644 A CN201911360644 A CN 201911360644A CN 110994188 A CN110994188 A CN 110994188A
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patch
metal
frequency selective
electromagnetic wave
selective surface
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李尔平
李天武
秦鹏飞
樊宇迪
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Haining Liyi Electronic Technology Co ltd
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Haining Liyi Electronic Technology Co ltd
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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
    • H01Q15/0026—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 said selective devices having a stacked geometry or having multiple layers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/027—Constructional details of housings, e.g. form, type, material or ruggedness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/008—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with a particular shape

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

The invention discloses a strong coupling frequency selective surface structure insensitive to the full angle of incident electromagnetic waves. The metal chip comprises a plurality of closely arranged periodic unit structures, wherein each periodic unit structure comprises a top-bottom layer metal patch, a dielectric plate and upper and lower semi-metal through holes; the top and bottom metal patches are respectively stuck on the upper and lower surfaces of the dielectric slab and are three-dimensionally symmetrical with the center of the dielectric slab; the top and bottom metal patches comprise circular patches and rectangular patches which are connected; the circular patch is arranged at the center of the surface of the dielectric plate, the semimetal via hole is positioned in the middle of the upper edge/lower edge of the surface of the dielectric plate, and the circular patch is connected with the semimetal via hole through the rectangular patch. The invention is suitable for the design of a frequency selective surface with microminiaturization, ultrathin structure and stable wide incidence angle, the unit size and the thickness are extremely small, and the resonance frequency is stable and unchanged in the incidence angle range of 0-88 degrees.

Description

Strong coupling frequency selective surface structure insensitive to incident electromagnetic wave full angle
Technical Field
The invention relates to the technical field of super-surfaces, in particular to a strong coupling frequency selective surface structure insensitive to the full angle of incident electromagnetic waves, which can be applied to the design of frequency selective surfaces with microminiaturization, ultrathin structures and stable wide incident angles.
Background
Frequency selective surface fss (frequency selective surfaces), also known as spatial filters, is usually composed of a two-dimensional periodic structure. The antenna has the functions of transmitting, reflecting or absorbing incident electromagnetic waves under specific frequency, so that the antenna is widely applied to the design of high-performance radome radomes, antenna reflecting plates, space electromagnetic interference shields and absorbers and electromagnetic cloaking.
Over the past two decades, a large number of experts and scholars carry out deep research on the frequency selection surface, and numerous technical breakthroughs are made from a simple single-order resonance structure to multi-order wide-bandwidth adjustable function realization with a complex structure and then to work band edge steep-drop research. However, many studies have been conducted based on the case where electromagnetic waves are incident perpendicularly. With the rapid development of communication technology, in practical application, a functional device designed based on the FSS is not sensitive to an incident angle, so that the high-performance operation of the system can be guaranteed. However, FSS structures are often sensitive to the incident angle, and as the incident angle changes, the operating frequency of FSS will shift, resulting in degradation of system performance, so that how to improve the angular performance of the frequency selective surface becomes a challenge. In addition, with the development of communication towards high frequency and high speed, chip packaging and other functional devices towards high integration, the size of the traditional frequency selection surface structure based on fluctuation physical resonance needs to be comparable to the wavelength of the working frequency, so that the structure is huge, the requirements of engineering realization and system miniaturization are not facilitated, and the microminiaturization ultrathin FSS structure which can be applied to chip packaging and other narrow spaces becomes another great challenge. Therefore, how to design a microminiaturized and ultra-thin FSS structure which is not sensitive to the whole angle of the incident electromagnetic wave is crucial to the development of the new generation of mobile communication technology.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the strong coupling frequency selective surface structure insensitive to the whole angle of the incident electromagnetic wave, which makes full use of the strong electric coupling between structural layers, realizes the extremely high miniaturization degree of the structure and realizes the complete insensitivity of the structural resonance frequency to the incident electromagnetic wave. The invention is suitable for the design of a frequency selective surface with microminiaturization, ultrathin structure and stable wide incidence angle, the unit size and the thickness are extremely small, and the resonance frequency is stable and unchanged in the incidence angle range of 0-88 degrees.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the frequency selective surface structure comprises a plurality of closely arranged periodic unit structures, each periodic unit structure mainly comprises a dielectric layer, two metal layers and a metal through hole for connecting the two metal layers, wherein the two metal layers are respectively attached to the two surfaces of the dielectric layer; the periodic unit structure comprises a top metal patch P1Dielectric plate D0And a bottom metal patch P2And connecting the top metal patch P1And a bottom metal patch P2Upper and lower semi-metal via hole V between1And V2Composition is carried out; top metal patch P1Is adhered to a medium plate D0Upper surface, bottom metal patch P2Is adhered to a medium plate D0Lower surface, bottom layer metal patch P2Is a top metal patch P1With a dielectric plate D0The solid geometric center of the light-emitting diode is arranged in a three-dimensional symmetrical mode with the center as the center; the top metal patch P1Mainly composed of a top circular patch A1And top rectangular patch B1Are connected to form the product; top circular patch A1Arranged on a dielectric plate D0Lower half metal via hole V at center of upper surface1On the dielectric plate D0The middle of the lower edge of the upper surface is a top circular patch A1And a lower semi-metal via V1Pass through the top rectangle paster B1Connecting; the bottom metal patch P2Mainly composed of a bottom circular patch A2Square patch B with bottom2Are connected to form the product; bottom circular patch A2Arranged on a dielectric plate D0At the center of the lower surface, an upper semi-metal via V2On the dielectric plate D0Upper edge of lower surfaceMiddle, bottom circular patch A2And an upper half-metal via V2Through the bottom rectangular patch B2And (4) connecting.
The top circular patch A1And a bottom circular patch A2The circles are the same size.
The top rectangular patch B1Square patch B with bottom2With a dielectric plate D0The solid geometric center of the metal via hole is in solid symmetry with the center, and the lower half metal via hole V is in solid symmetry1Position and upper half-metal via V2Position by dielectric plate D0The geometric center of the solid is in central solid symmetry.
In the frequency selective surface structure, a plurality of periodic unit structures in the same column are connected, and a top rectangular patch B of a plurality of periodic unit structures in the same column1Square patch B with bottom2Are all arranged in parallel, so that the lower half metal via hole V of the periodic unit structure positioned at the upper side in two adjacent periodic unit structures1And an upper half metal via V of the periodic cell structure at the lower side2Butt-jointed to form a circular via hole, so that the top rectangular patch B of the periodic unit structure on the upper side1And a bottom rectangular patch B of a periodic unit structure on the lower side2Connected by circular vias.
The dielectric plate D0A Rogers RT5880 plate was used, the dielectric constant was 2.2 and the dielectric loss tangent was 0.0009.
The frequency of the electromagnetic wave incident on the frequency selective surface structure is 1GHz-5 GHz.
When the angle of the electromagnetic wave incident to the frequency selection surface structure is changed within the range of +/-88 degrees, the transmission zero point is always kept unchanged at 2.35 GHz.
The method is applied to the antenna housing insensitive to the angle, the radar cover and the full-angle stable absorber, and has great application value in the fields of modern communication, radar, military, national defense and the like.
The invention is a reflection-type FSS, when electromagnetic waves in free space are incident to the frequency selection surface structure, the selection characteristic is generated on the electromagnetic waves with specific incident frequency, so that electromagnetic wave signals in a working frequency band are totally reflected, out-of-band signals can pass through the frequency selection surface structure, and the structural resonance frequency is not sensitive to the incident angle.
The invention is suitable for the design of a frequency selective surface with microminiaturization, ultrathin structure and stable wide incidence angle, the unit size and the thickness are extremely small, and the resonance frequency is stable and unchanged in the incidence angle range of 0-88 degrees. The method can be well applied to the design of angle-insensitive antenna covers, radar covers and full-angle stable absorbers, and has great application value in the fields of modern communication, radars, military, national defense and the like.
The antenna housing of the invention has the following working principle:
when electromagnetic waves in space reach the surface of the structure at different angles theta, different modes of the electromagnetic waves are excited on the structure, so that equivalent parameters of the structure are changed under different incident angles, the performance of the structure is changed, and in order to overcome the incident angle problem, the design concept of the strong coupling frequency selection surface is provided to improve the angle stability of the FSS structure;
the invention provides a design concept of a strong coupling frequency selection surface, wherein circular patches A are respectively distributed on top layer metal and bottom layer metal at the geometric center of a unit structure1And A2And because the design adopts a very thin dielectric layer, a very strong coupling effect exists between the circular metals corresponding to the top layer and the bottom layer, and an electric field is always bound between the two wafers, so that a strong coupling capacitor is formed, and the strong coupling cannot be changed by incident electromagnetic waves even in oblique incidence and always keeps a stable mode, so that the proposed strong coupling frequency selection surface has good angle stability.
As shown in FIG. 6, the electric field distribution at the middle of the medium at the resonant frequency of 2.35GHz can be found to be completely confined to the top circular patch A1And the bottom circular patch A2It can be equivalent to a large capacitance Cs from the viewpoint of an equivalent circuit.
The structural current distribution at the resonant frequency of 2.35GHz of the frequency selective surface structure is shown in FIG. 7, and the current is mainly concentrated in the upper and lower layers of rectangular patches B1And B2And a metal via hole connecting the upper and lower layers. Therefore, the rectangular metal patch can be regarded as the inductor L0Likewise, a metal via is also equivalent to an inductor Lv. The equivalent circuit model of the proposed structure is shown in fig. 2, the inductance L0And LvCan be equivalent to an inductor LsInductance LsAnd a coupling capacitor CsConstituting an LC series resonant circuit so as to be at the resonant frequency
Figure BDA0002337083000000031
A stop band is formed nearby, so that the incident electromagnetic wave in the frequency band is reflected.
The equivalent circuit parameters of the invention are calculated by the following formula:
Figure BDA0002337083000000032
Figure BDA0002337083000000041
Figure BDA0002337083000000042
Figure BDA0002337083000000043
Ls＝L0+Lv(5)
wherein epsilon0Denotes the dielectric constant in free space, ReRepresenting the effective coupling radius, h, after considering the edge effect of the circular patch0Denotes the thickness of the medium, r0Denotes the physical radius, ε, of the circular patchrDenotes the relative dielectric constant of the dielectric, r1 denotes the metal via radius at the cell structure edge, p denotes the structural cell period, μ0Denotes the permeability in free space, w0Representing the width of the rectangular metal patch;
metal via hole V for connecting upper and lower layers of rectangular patches1And V2Stability to angleThe principle of structural resonance belongs to the wave physics without the metal via hole, and the resonance is mainly influenced by the size and length of the structural point and is particularly sensitive to the incident angle; and the existence of the metal via hole ensures that the structure is always in the circuit physics and ensures the angle stability of the structure.
The invention has the beneficial effects that:
the strong coupling frequency selective surface of the invention adopts an interlayer strong coupling mechanism to realize the microminiaturization design of a frequency selective surface structure, the final unit size is about 0.07 lambda, more units can be placed in a narrow space, and thus, the manufactured board is closer to an infinite periodic structure.
The structure of the invention can be equivalent to an LC series resonance circuit, a stable stop band is generated near the resonance frequency of 2.35GHz, wherein the-10 dB inhibition bandwidth reaches 2GHz (1.5 GHz-3.5 GHz), and the invention has good inhibition effect on incident electromagnetic waves in the frequency band.
The invention has excellent angle stability performance due to the unique structural design, the transmission zero point of the invention is quite stable within the incident angle range of +/-88 degrees, the resonance frequency is still stable at 2.35GHz even when the angle is close to 90 degrees, and the insensitivity to the full angle of incident electromagnetic waves is realized.
The design of the radar antenna has great breakthrough and has great application value in the fields of modern communication, radar, military, national defense and the like.
The strong coupling frequency selection surface provided by the invention can be widely expanded in the design of high-performance antenna covers and radar covers which are insensitive to angles and full-angle stable absorbers, and has extremely high application value in modern communication, radar and military communication such as miniaturization of FSS functional devices and 5G.
In summary, the invention is suitable for the design of a frequency selective surface with microminiaturization, ultrathin structure and stable wide incidence angle, the resonance frequency of the frequency selective surface can be kept unchanged in the full angle range of [ 0-90 degrees ], the limitation of the traditional FSS structure on the sensitivity of the incidence angle is broken through, and a design scheme and theoretical guidance are provided for the design of a high-performance FSS functional device. The method has great application value in the fields of modern communication, radar, military, national defense and the like.
Drawings
Fig. 1 is a three-dimensional structural view of an antenna cover according to an embodiment of the present invention;
FIG. 2 is a three-dimensional view of the cell structure of the present invention and its corresponding equivalent circuit model;
FIG. 3 is a front view of the cell structure of the present invention;
FIG. 4 is a top metal structure view of the cell structure of the present invention;
FIG. 5 is a view of the underlying metal structure of the cell structure of the present invention;
FIG. 6 is a graph of the electric field distribution in the medium at 2.35GHz for the cell structure of the present invention;
FIG. 7 is a diagram of the current distribution in the top metal structure at 2.35GHz for the inventive cell structure;
FIG. 8 is a transmission spectrum of the present invention when an incident electromagnetic wave is incident from multiple angles;
FIG. 9 is a graph comparing the simulation results of the equivalent circuit model according to the present invention with the full-wave simulation results.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the embodied frequency selective surface structure includes a plurality of closely arranged periodic unit structures, each of which mainly comprises a dielectric layer, two metal layers and a metal via hole connecting the two metal layers, wherein the two metal layers are respectively attached to two surfaces of the dielectric layer.
As shown in fig. 2 and 3, the periodic unit structure includes a top metal patch P1Dielectric plate D0And a bottom metal patch P2And connecting the top metal patch P1And a bottom metal patch P2Upper and lower semi-metal via hole V between1And V2Composition is carried out; top metal patch P1Is adhered to a medium plate D0Upper surface, bottom metal patch P2Is adhered to a medium plate D0Lower surface, bottom layer metal patch P2Is a top metal patch P1With a dielectric plate D0Is arranged in a three-dimensional symmetrical way with the solid geometric center as the center.
As shown in fig. 4, the top metal patch P1Mainly composed of a top circular patch A1And top rectangular patch B1Are connected to form the product; top circular patch A1Arranged on a dielectric plate D0Lower half metal via hole V at center of upper surface1On the dielectric plate D0The middle of the lower edge of the upper surface is a top circular patch A1And a lower semi-metal via V1Pass through the top rectangle paster B1And (4) connecting. As shown in fig. 5, the bottom metal patch P2Mainly composed of a bottom circular patch A2Square patch B with bottom2Are connected to form the product; bottom circular patch A2Arranged on a dielectric plate D0At the center of the lower surface, an upper semi-metal via V2On the dielectric plate D0Middle, bottom circular patch A of upper edge of lower surface2And an upper half-metal via V2Through the bottom rectangular patch B2And (4) connecting.
As shown in fig. 2, a top circular patch a1And a bottom circular patch A2The circular patch B with the same size and rectangular top1Square patch B with bottom2With a dielectric plate D0The solid geometric center of the metal via hole is in solid symmetry with the center, and the lower half metal via hole V is in solid symmetry1Position and upper half-metal via V2Position by dielectric plate D0The geometric center of the solid is in central solid symmetry.
In the frequency selective surface structure, a plurality of periodic unit structures in the same row are not connected, a plurality of periodic unit structures in the same column are connected, and a top rectangular patch B of the plurality of periodic unit structures in the same column is connected1Square patch B with bottom2Are all arranged in parallel, so that the lower half metal via hole V of the periodic unit structure positioned at the upper side in two adjacent periodic unit structures1And an upper half metal via V of the periodic cell structure at the lower side2Butt-jointed to form a circular via hole, so that the top rectangular patch B of the periodic unit structure on the upper side1And is located belowBottom rectangular patch B of side periodic unit structure2Through circular via hole connection, the top layer is connected with the bottom layer metal through the metal via hole at the edge of the structure, and the semi-metal via holes on the upper side and the lower side of the connected upper side and lower side of the plurality of periodic unit structures in the same row are respectively connected with the head-tail semi-metal via holes of the adjacent unit structures.
In the embodiment, the dielectric plate D0A Rogers RT5880 plate was used, the dielectric constant was 2.2 and the dielectric loss tangent was 0.0009.
The embodiment of the present invention takes a total angle reflector as an example, and specifically describes the implementation of each part of the present invention and the influence of each structural parameter on the model performance:
as shown in fig. 1, the embodiment employs a 20 × 20 periodic cell array, the cell period in the present invention is 10mm, the structural size of each part is shown in table 1, and the corresponding size can be selected according to specific design targets in practical application. When the top layer is a circular metal patch A1And the bottom layer circular metal patch A2The relative area of the stop band is increased, so that the stop band moves towards the low frequency direction, which is mainly caused by A1And A2The size of the strong coupling capacitance is controlled, and when the relative areas of the strong coupling capacitance and the strong coupling capacitance are increased, the corresponding capacitance C is controlledsIncreasing, thereby causing the resonant frequency to shift to a lower frequency; similarly, when the top metal patch B1Or top metal patch B2When the width increases, the stop band will move towards high frequencies, mainly due to the fact that when B is increased1Or B2When the width is increased, the equivalent inductance of the transformer is correspondingly reduced, so that the transmission zero point is increased.
In addition, the dielectric of the structure has a large impact on the frequency selective surface properties because the dielectric constant and dielectric thickness of the dielectric will control the coupling between the top and bottom metal wafers. As the dielectric constant increases, the resonant frequency will shift to lower frequencies, and likewise, as the thickness of the medium increases, the coupling will be reduced, causing the resonant frequency to shift to higher frequencies. The important influence of the medium adds an important reference point for the adjustment of the performance of the frequency selective surface, so that the design of the target structure is more flexible.
Table 1 dimensions of the various parts of the structure of the invention
Figure BDA0002337083000000061
Figure BDA0002337083000000071
The periodic unit size of the Rogers RT5880 plate adopted by the medium plate is 10 mm. The plate is characterized by very low dielectric loss and thus less impact on the insertion loss of the pass band. However, the sheet material is relatively expensive, and in practical use, the type of medium can be appropriately selected and designed according to a predetermined target.
The strongly coupled frequency selective surface is a design and method innovation of the invention. The design of the traditional frequency selection surface mainly considers the coupling between structures in the same layer, and is different from the traditional design. In addition, the introduced strong coupling between layers is very beneficial to the miniaturization design of the structure, the miniaturization degree of the structure can be extremely small, the structure is not sensitive to the incident angle, and the structural design with stable full angle is further realized. The thinner the dielectric thickness is, the more beneficial to the miniaturized design of the structure, so that the structure can be miniaturized in the transverse direction and can be designed to be ultrathin in the longitudinal direction. Table 2 specifically describes the effect of metal circular patch radius and dielectric constant, dielectric thickness on transmission performance.
TABLE 2 influence of radius of metal circular patch, dielectric constant and dielectric thickness on transmission performance
Figure BDA0002337083000000072
The transmission spectrum of the embodiment when the electromagnetic wave is incident from multiple angles is shown in fig. 8, and it can be found that the resonant frequency is always kept at 2.35GHz within the full-angle range [ 0-90 °), thereby realizing the design of insensitivity to the full-angle of incidence. Meanwhile, fig. 9 depicts the comparison of the simulation result of the equivalent circuit model with the full-wave simulation result, and in the traditional FSS structural design, the equivalent circuit model can only simulate the transmission performance of vertical incidence, and it can be found that the equivalent circuit in the invention is equivalent to the vertical incidence condition, and the equivalent result in multi-angle incidence is completely consistent with all the simulation results, thereby fully verifying the theoretical analysis of the proposed strong coupling frequency selection surface.
Therefore, the invention realizes the design of a microminiaturized and ultrathin frequency selective surface structure insensitive to the whole angle of the incident electromagnetic wave.

Claims (8)

1. A strong coupling frequency selective surface structure insensitive to the whole angle of incident electromagnetic waves comprises a plurality of closely arranged periodic unit structures, each periodic unit structure mainly comprises a dielectric layer, two metal layers and a metal via hole for connecting the two metal layers, wherein the two metal layers are respectively attached to the two surfaces of the dielectric layer; the method is characterized in that: the periodic unit structure comprises a top metal patch P1Dielectric plate D0And a bottom metal patch P2And connecting the top metal patch P1And a bottom metal patch P2Upper and lower semi-metal via hole V between1And V2Composition is carried out; top metal patch P1Is adhered to a medium plate D0Upper surface, bottom metal patch P2Is adhered to a medium plate D0Lower surface, bottom layer metal patch P2Is a top metal patch P1With a dielectric plate D0The solid geometric center of the light-emitting diode is arranged in a three-dimensional symmetrical mode with the center as the center; the top metal patch P1Mainly composed of a top circular patch A1And top rectangular patch B1Are connected to form the product; top circular patch A1Arranged on a dielectric plate D0Lower half metal via hole V at center of upper surface1On the dielectric plate D0Middle of the lower edge of the upper surface, top circleShaped paster A1And a lower semi-metal via V1Pass through the top rectangle paster B1Connecting; the bottom metal patch P2Mainly composed of a bottom circular patch A2Square patch B with bottom2Are connected to form the product; bottom circular patch A2Arranged on a dielectric plate D0At the center of the lower surface, an upper semi-metal via V2On the dielectric plate D0Middle, bottom circular patch A of upper edge of lower surface2And an upper half-metal via V2Through the bottom rectangular patch B2And (4) connecting.
2. A strongly coupled frequency selective surface structure insensitive to the total angle of an incident electromagnetic wave, as claimed in claim 1, characterized in that: the top circular patch A1And a bottom circular patch A2The circles are the same size.
3. A strongly coupled frequency selective surface structure insensitive to the total angle of an incident electromagnetic wave, as claimed in claim 1, characterized in that: the top rectangular patch B1Square patch B with bottom2With a dielectric plate D0The solid geometric center of the metal via hole is in solid symmetry with the center, and the lower half metal via hole V is in solid symmetry1Position and upper half-metal via V2Position by dielectric plate D0The geometric center of the solid is in central solid symmetry.
4. A strongly coupled frequency selective surface structure insensitive to the total angle of an incident electromagnetic wave, as claimed in claim 1, characterized in that: in the frequency selective surface structure, a plurality of periodic unit structures in the same column are connected, and a top rectangular patch B of a plurality of periodic unit structures in the same column1Square patch B with bottom2Are all arranged in parallel, so that the lower half metal via hole V of the periodic unit structure positioned at the upper side in two adjacent periodic unit structures1And an upper half metal via V of the periodic cell structure at the lower side2Butt-jointed to form a circular via hole, so that the top rectangular patch B of the periodic unit structure on the upper side1And a bottom rectangle of the periodic unit structure at the lower sidePaster B2Connected by circular vias.
5. A strongly coupled frequency selective surface structure insensitive to the total angle of an incident electromagnetic wave, as claimed in claim 1, characterized in that: the dielectric plate D0A Rogers RT5880 plate was used, the dielectric constant was 2.2 and the dielectric loss tangent was 0.0009.
6. A strongly coupled frequency selective surface structure insensitive to the total angle of an incident electromagnetic wave, as claimed in claim 1, characterized in that: the frequency of the electromagnetic wave incident on the frequency selective surface structure is 1GHz-5 GHz.
7. A strongly coupled frequency selective surface structure insensitive to the total angle of an incident electromagnetic wave, as claimed in claim 1, characterized in that: when the angle of the electromagnetic wave incident to the frequency selection surface structure is changed within the range of +/-88 degrees, the transmission zero point is always kept unchanged at 2.35 GHz.
8. Use of a strongly coupled frequency selective surface structure insensitive to the total angle of an incident electromagnetic wave, according to claims 1 to 7, characterized in that: the method is applied to the antenna housing insensitive to the angle, the radar cover and the full-angle stable absorber.
CN201911360644.0A 2019-12-25 2019-12-25 Strong coupling frequency selective surface structure insensitive to incident electromagnetic wave full angle Pending CN110994188A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112688044A (en) * 2020-11-24 2021-04-20 锐石创芯（深圳）科技有限公司 Integrated circuit chip and radio frequency module
CN113451784A (en) * 2021-07-14 2021-09-28 海宁利伊电子科技有限公司 High-performance packaging radiation absorption structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112688044A (en) * 2020-11-24 2021-04-20 锐石创芯（深圳）科技有限公司 Integrated circuit chip and radio frequency module
CN112688044B (en) * 2020-11-24 2021-07-23 锐石创芯（深圳）科技有限公司 Integrated circuit chip and radio frequency module
CN113451784A (en) * 2021-07-14 2021-09-28 海宁利伊电子科技有限公司 High-performance packaging radiation absorption structure

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