CN106654567B - Capacitive and inductive surface coupling mechanism miniaturized high-performance high-frequency band communication radome - Google Patents
Capacitive and inductive surface coupling mechanism miniaturized high-performance high-frequency band communication radome Download PDFInfo
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- CN106654567B CN106654567B CN201710052102.1A CN201710052102A CN106654567B CN 106654567 B CN106654567 B CN 106654567B CN 201710052102 A CN201710052102 A CN 201710052102A CN 106654567 B CN106654567 B CN 106654567B
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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
- H01Q1/422—Housings not intimately mechanically associated with radiating elements, e.g. radome comprising two or more layers of dielectric material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a capacitive and inductive surface coupling mechanism miniaturized high-performance high-frequency band communication radome. The frequency selective surface is mainly composed of a periodic unit array, each periodic unit is divided into a dielectric layer and a metal layer, the dielectric layer comprises an upper dielectric layer, a lower dielectric layer and a dielectric layer in the middle of the upper dielectric layer, and the metal layer comprises a complete metal patch on the outer surfaces of the upper dielectric layer and the lower dielectric layer and a metal gap patch between the adjacent dielectric layers; and the electromagnetic waves in the free space are selectively filtered by the antenna housing and then output the electromagnetic waves in the required working frequency range. The invention is suitable for the design of the ultra-wideband communication radome with high angle and polarization stability, has small and stable insertion loss in the passband, has high-suppression wide stop band after the passband, has high conversion speed from the passband to the stop band working state, and has excellent angle and polarization stability. The method has great application value in the fields of modern communication, radar, military national defense and the like.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a miniaturized high-performance high-frequency band communication antenna housing of a capacitive and inductive surface coupling mechanism, which can be applied to high-frequency band 5G communication and radar.
Background
With the maturation of 4G communication technology to market, ultra-high speed 5G communication technology is a new generation communication technology meeting the requirement of higher mobile communication performance, and becomes a hot spot of research in the mobile communication industry nowadays, and the market goal of 5G mobile communication in 2020 also greatly promotes the research of 5G communication technology.
The 5G communication is more focused on user experience, improves the transmission rate of a communication network, reduces energy consumption, fully utilizes high-frequency spectrum resources, and realizes the wide application of 5G. Thus, 5G communication is required to have a higher transmission rate and a wider bandwidth. According to the transmission rate requirement of 10Gbit/s, a passband bandwidth of 2GHz is actually required, the insertion loss in the passband is required to be smaller than 0.8dB in order to ensure the communication quality, in addition, in actual communication, electromagnetic wave signals come from all directions, and equipment is required to have good angle stability so as to ensure the communication quality, and higher requirements are put on the design of an antenna housing.
Nowadays, the design of radomes is usually implemented by using frequency selective surface technology, and there are several years of researches on this technology at home and abroad. The traditional frequency selection surface structure can realize a narrower passband or stopband, a plurality of novel frequency selection surfaces are designed at present, a wider passband can be realized, but most of the frequency selection surface structure is limited to a low frequency band of 10GHz or even lower, in addition, the structure selection performance of the traditional frequency selection surface structure is still to be improved, the characteristics are mainly represented in that the insertion loss of the passband is overlarge, so that the communication quality is reduced, on the other hand, the edge of the passband is slow in descending speed, the conversion speed from the passband to the stopband is not fast enough, and the selectivity is poor. A more important problem is that the angular stability is a problem that is faced today, and when the angle of incidence of electromagnetic waves changes, a large offset is caused, which has a great influence on the transmission performance.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the miniaturized high-performance high-frequency band communication antenna housing with the capacitive and inductive surface coupling mechanism, and the smart coupling design of 4 metal layers has stable and efficient selective permeability for electromagnetic waves incident in multiple directions in space.
The technical scheme adopted by the invention for solving the technical problems is as follows:
1. a capacitive and inductive surface coupling mechanism miniaturized high-performance high-frequency band communication radome:
the antenna housing is a frequency selective surface mainly composed of a periodic unit array, each periodic unit is divided into a dielectric layer and a metal layer, the dielectric layer comprises an upper dielectric layer and a lower dielectric layer and a dielectric layer in the middle of the dielectric layer, and the metal layer comprises a complete metal patch on the outer surfaces of the upper dielectric layer and the lower dielectric layer and a metal gap patch between the adjacent dielectric layers; and after the electromagnetic waves in the free space are selectively filtered by the antenna housing, filtering out other clutters, and outputting the electromagnetic waves in the required working frequency range.
The ultra-wideband antenna housing is designed for ultra-wideband antenna housing with high requirements on angle and polarization stability in high-frequency band communication, insertion loss in a passband is small and stable, the passband is provided with a high-suppression wide stop band, the conversion speed from the passband to the band stop working state is high, and the angle, polarization stability and frequency selectivity are excellent.
The periodic unit comprises an upper layer metal patch P 1 Upper layer thin medium D 1 Upper metal slit sheet P 2 Medium D with middle layer thickness 2 Lower metal slit sheet P 3 Lower thin medium D 3 And a lower metal patch P 4 The method comprises the steps of carrying out a first treatment on the surface of the Upper layer metal patch P 1 Attached to the upper thin medium D 1 Upper surface, upper layer metal slit sheet P 2 Thin medium D on upper layer 1 With medium D of intermediate layer thickness 2 Between the lower metal slit sheet P 3 Thin medium D located at lower layer 3 With medium D of intermediate layer thickness 2 Between the lower metal patches P 4 Attached to the lower thin medium D 3 A lower surface; wherein the upper layer metal patch P 1 And the lower layer metal patch P 4 The structural dimensions are the same, and the upper metal slit sheet P 2 With underlying metal slit sheet P 3 The structural dimensions are the same, and the upper layer of thin medium D 1 With an underlying thin medium D 3 The structural dimensions are the same.
The upper metal slit sheet P 2 And a lower metal slit sheet P 3 Mainly comprises a duplex-character-shaped metal patch structure and a peripheral square ring metal patch and a gap between the two: the duplex-shaped metal patch is in a cross shape of a Yele scattering cold cross and is positioned at the center of the peripheral square ring metal patch; the peripheral square ring metal patch is positioned on the outer ring of the duplex-shaped metal patch, and the outer side length is the same as the side length of the periodic unit.
The upper layer metal patch P 1 And a lower metal patch P 4 Respectively arranged on the upper layer metal patches P 1 And the lower layer metal patch P 4 Is defined in the center of the (c).
Preferably, in particularImplemented upper thin medium D 1 Medium D with middle layer thickness 2 And an underlying thin medium D 3 The dielectric constant of (2) was 3.5, and the dielectric loss tangent was 0.0015.
Under the condition that space electromagnetic waves are vertically incident, the insertion loss is smaller than 0.4dB in the passband range of 27.15GHz-29.65GHz, and the suppression is larger than 20dB in the stopband range of 31.15GHz-33.52 GHz; when the space electromagnetic wave is incident at +/-45 degrees, the insertion loss is less than 1.5dB in the passband range of 27.08GHz-29.80 GHz; when the incident electromagnetic wave changes within the incident angle range of +/-85 degrees, the transmission pole and the zero point of the incident electromagnetic wave basically do not change, the angle and polarization stability are extremely high, the rapid conversion from the band to the band stop working state is realized, and the frequency selection performance is extremely good.
2. The radome is applied to modern communication of 5G, radar and military communication.
The antenna housing design adopts a miniaturized design, and the unit size is reduced by three times compared with the structural size designed by the traditional scheme, but is still suitable for processing and producing by the traditional PCB process.
Compared with the prior art, the invention has the beneficial effects that:
the square metal patch antenna with the upper layer and the lower layer and the periphery metal square ring with the gap layers in the middle provide a passband with very large bandwidth and extremely small insertion loss for the radome, and the insertion loss of the passband is smaller than 0.4dB in the range of 27.15GHz-29.65GHz frequency bands after electromagnetic waves vertically incident to the radome pass through each layer of structure of the radome in sequence.
The two middle metal gap layers provide the antenna housing with the stop band with wide bandwidth range and high suppression, and the design concept of the two metal gap layers further improves the conversion speed from the pass band to the stop band. For electromagnetic waves vertically incident to the antenna housing, the internal resistance band inhibition is more than 20dB in the frequency band range of 31.15GHz-33.52 GHz.
The invention has the unique structural design, so that the invention has extremely high angle stability, all performances of electromagnetic waves in space are extremely stable within the incident angle range of +/-60 degrees, and the transmission poles of the electromagnetic waves are quite stable within the incident angle range of +/-85 degrees, so that the transmission zeros of the electromagnetic waves are basically not deviated. In addition, the electromagnetic dual polarization performance of the invention is stable, and simultaneously supports TE and TM polarization modes.
The invention has extremely high application value in modern communication such as miniaturization of antenna devices, 5G and the like, radar and military communication.
Drawings
Fig. 1 is a three-dimensional block diagram of a radome according to an embodiment of the present invention.
Fig. 2 is a three-dimensional structural view of the unit structure of the present invention.
Fig. 3 is a front view of the unit structure of the present invention.
Fig. 4 is a top view of the cell structure of the present invention.
Fig. 5 is a view of an intermediate metal slit layer of the cell structure of the present invention.
Fig. 6 is a graph showing the effect of changing the size of a square metal patch on the transmission performance of a radome of the present invention.
Fig. 7 is a graph of the transmission performance of the radome of the present invention for normal incidence TE, TM polarization modes.
Fig. 8 is a graph showing the effect of TE polarization mode electromagnetic wave incidence angle on radome performance in the present invention.
Fig. 9 is a graph showing the effect of TM polarized electromagnetic wave incidence angle on radome performance in the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the radome is a frequency selective surface consisting essentially of an array of periodic elements. Each periodic unit is divided into a dielectric layer and a metal layer, the dielectric layer comprises an upper dielectric layer, a lower dielectric layer and a dielectric layer in the middle of the dielectric layer, and the metal layer comprises a complete metal patch on the outer surfaces of the upper dielectric layer and the lower dielectric layer and a metal gap patch between the adjacent dielectric layers.
As shown in fig. 2 and 3, the periodic unit includes an upper metal patch P 1 Upper layer thin medium D 1 Upper metal slit sheet P 2 Medium D with middle layer thickness 2 Lower metal slit sheet P 3 Lower thin medium D 3 And lower partLayer metal patch P 4 The method comprises the steps of carrying out a first treatment on the surface of the Upper layer metal patch P 1 Attached to the upper thin medium D 1 Upper surface, upper layer metal slit sheet P 2 Thin medium D on upper layer 1 With medium D of intermediate layer thickness 2 Between the lower metal slit sheet P 3 Thin medium D located at lower layer 3 With medium D of intermediate layer thickness 2 Between the lower metal patches P 4 Attached to the lower thin medium D 3 A lower surface; wherein the upper layer metal patch P 1 And the lower layer metal patch P 4 The upper metal slit sheet P has the same structural dimensions and the same positions on the surface 2 With underlying metal slit sheet P 3 The structural dimensions are the same, and the upper layer of thin medium D 1 With an underlying thin medium D 3 The structural dimensions are the same.
Radome medium D with middle layer thickness 2 The upper and lower surfaces are respectively stuck with an upper metal slit sheet P 2 And a lower metal slit sheet P 3 Wherein the upper metal slit sheet P 2 And a lower metal slit sheet P 3 Mainly comprises a duplex-shaped metal patch structure a, a peripheral square ring metal patch b and a gap between the two. As shown in fig. 5, the duplex-shaped metal patch a is in a cross shape of a cross, is positioned at the center of the peripheral square ring metal patch b, and is specifically formed by uniformly distributing four T-shaped units at intervals along the circumferential direction in a spiral center symmetry manner. The peripheral square ring metal patch b is positioned on the outer ring of the duplex-shaped metal patch a, and the outer side length is the same as the side length of the periodic unit, so that the metal square ring is a standard metal square ring.
As shown in fig. 4, the upper metal patch P 1 And a lower metal patch P 4 Square metal patches which are positioned in the center of the unit structure and are respectively arranged on the upper metal patches P 1 And the lower layer metal patch P 4 Is defined in the center of the (c).
The working principle of the antenna housing of the invention is as follows:
when the incidence angle of electromagnetic waves in the space is theta, the periodic size of the antenna housing unit determines the phase difference between the electromagnetic waves reaching the surface of each unit, and the larger the phase difference is, the larger the deviation of transmission performance is caused when the electromagnetic waves are perpendicularly incident, so that the influence of the electromagnetic waves on the transmission performance of the antenna housing under the condition of multi-angle incidence is overcome.
The square metal patch layers on the two outermost sides of the radome are periodically arranged to form a capacitive surface, and electric field energy is stored; the peripheral square ring metal in the middle two metal gap layers can be equivalent to inductance to form an inductive surface for storing magnetic field energy. The coupling mechanism of the capacitive surface and the inductive surface suppresses the fluctuation of electromagnetic waves, breaks through the limitation that the cell size is consistent with the resonance wavelength, and thus realizes the miniaturization design of the structural unit.
The outermost two side square metal patch layers can be considered as transmitting and receiving antennas, respectively, which can themselves be equivalent to series resonant loops. The peripheral square ring metal of the middle two metal gap layers is an inductive structure, and forms an LC parallel resonant circuit with square metal patches on the two outermost sides, so that a bandpass effect is formed. The peripheral square ring metal of the middle two metal gap layers and the double-word-shaped structure of the middle metal gap layer form a capacitive structure, and the double-word-shaped structure is inductive, so that the structure is regarded as an LC series resonant circuit, and a transmission zero point is generated at the descending position of the passband, so that the rapid descending of the edges of the passband is realized.
The antenna housing provided by the invention has the advantages that on one hand, the design of the bimetal gap layer is adopted, the high-order filtering effect is formed, the bandwidth is widened, the flatness in the working frequency band is increased, and the selectivity of the antenna housing is improved; on the other hand, the design concept of complete symmetry is adopted, and the dual polarization stability design under TE and TM modes of electromagnetic waves is realized.
The embodiment of the invention takes the antenna housing applied to the 5G communication frequency band as an example, and specifically illustrates the implementation of each part of the invention and the influence of each structural parameter on the transmission performance of the antenna housing:
with the rapid development of 5G communication technology, the related standard is gradually formed, and now it appears that the 2GHz frequency band before and after 28.5GHz is the most likely working frequency band of 5G communication, and meanwhile, the passband insertion loss in the frequency band needs to be less than 0.8dB, and in addition, the frequency band has good angle and polarization stability. The invention adopts the capacitive, inductive surface coupling and AFFA technology to realize the miniaturized high-performance design of the 5G communication high-frequency range radome, and the radome has stable transmission performance within the incident angle range of +/-60 degrees, realizes the rapid conversion from band to band-stop working state, and has good frequency selection performance.
As shown in fig. 1, the embodiment employs a 32 x 32 periodic cell array, square metal patches P on both outermost sides of the periodic cell structure 1 And P 2 All were squares with a side length of 1.73 mm. The selection of the dimensions may be made in practice according to the specific design passband objectives. Its dimensional change affects the change of the two transmission poles of the passband. When the size of the square metal patch increases, the entire passband is shifted in the low frequency direction, and the passband bandwidth decreases, but the passband insertion loss decreases. This is mainly because as the size of the square metal patch increases, its resonant frequency decreases, so the passband shifts to the low frequency direction; under the condition that the structure size of other parts is not changed, the coupling strength between the square patch and the metal gap layer is increased due to the increase of the size of the square patch, so that the insertion loss of a pass band is reduced, and the stability in the pass band is improved at the expense of the bandwidth of the pass band. But the dimensional change of the square metal patch has no effect on the radome transmission zero, mainly because the transmission zero is mainly controlled by the intermediate metal slot layer. Fig. 6 specifically illustrates the effect of square metal patch size variation on passband effects.
Upper layer thin medium D 1 Medium D with middle layer thickness 2 Lower layer thin medium D 3 All are Rogers RO3035 sheets with a periodic unit size of 2.53mm. The plate has the characteristics of smaller dielectric loss, so that the insertion loss of the passband is less affected. However, the price of the plate is relatively high, and in practical application, the plate with the dielectric constant similar to that of the material can be selected for design processing, so that the production cost is reduced.
As shown in fig. 2, 3 and 4, the radome intermediate layer thickness medium D 2 The two side surfaces are respectively stuck with upper metal gap piece P 2 And a lower metal slit sheet P 3 These two metal gap layers are the design core of the present invention. Firstly, for the outermost square annular metal patch structure b, the outer side length thereof is 2.53mm, namely the size of the periodic unit structure. The size of the structure b and the two outermost layers of square metal patches P 1 And P 4 The size determines the working frequency band of the radome, and the increase of the structure size of the periodic unit can lead the passband to move towards the low frequency direction, so that the insertion loss in the passband is increased, and the bandwidth of the passband is widened. This is mainly an increase in cell period, so that the coupling strength between cells decreases, and the passband insertion loss increases; the increase in the outer length of structure b causes the resonant frequency to decrease and the passband to move in the low frequency direction. Similarly, the change of the inner side length of the square annular metal patch at the outermost periphery also affects the passband.
Intermediate two metal gap layers P 1 And P 2 In addition to the effect on the passband, it is also decisive for the stopband after the passband. As shown in fig. 5, the size of the intermediate duplex-shaped metal structure a determines the variation of the stop band. When the main structure length L of the structure a increases, the stop band moves in the low frequency direction. This is mainly because when the structure of the other part is not changed but L is increased, the gap between the structure a and the structure b is reduced, the distance between the two polar plates corresponding to the capacitance is reduced, so that the capacitance is enhanced, the resonance frequency generated by the LC series resonant circuit is reduced, and the stop band is shifted to the low frequency direction. When the arm length J of the double-sided zigzag metal structure a increases, the corresponding stop band also moves in the low frequency direction. This is mainly due to the increase in J in structure a, which corresponds to an increase in the plate area of the capacitor, thus resulting in an increase in the capacity and a decrease in the resonant frequency. Table 1 specifically describes the effect of a dimensional change of the "double i" shaped metal structure a on the stop band effect.
TABLE 1 influence of dimensional changes of double I-shaped Metal Structure a on stopband Effect
As shown in FIG. 7, the transmission characteristic curve of the embodiment is that the insertion loss is less than 0.4dB in the passband of the bandwidth of 27.45 GHz-29.52 GHz, and the insertion loss is less than 0.8dB in the bandwidth of 27.19 GHz-29.64 GHz; in addition, the example has excellent frequency selectivity, and is particularly characterized in that the falling speed of the falling edge of the pass band is very fast, so that the rapid conversion from the pass band to the stop band is realized; the stop band suppression of the bandwidth of 31.18 GHz-33.53 GHz is more than 20dB, and meanwhile, the transmission effects of TE and TM in two polarization modes can be found to be completely matched, so that the design requirement of the 5G communication radome is well met.
As shown in fig. 8 and 9, the influence of the radome of the embodiment on the transmission performance of the radome when the incident angle of the electromagnetic wave is changed is described. The graph can find that the transmission characteristic curve basically coincides with the transmission characteristic curve under normal incidence within the incidence angle range of +/-45 degrees, and has quite stable transmission performance. In addition, as the incident angle increases further, the wave impedance changes when the incident angle increases, which causes unavoidable problems such as an increase in passband insertion loss in the TE mode and a decrease in passband bandwidth in the TM mode, but it can be seen that the increase in angle does not substantially shift the transmission pole or zero in either the TE mode or the TM mode.
Therefore, through the implementation, the invention realizes the design of the high-performance miniaturized radome with wide passband insertion loss, wide stopband high suppression, steep passband falling edge and quite stable angle and dual polarization performance in high-frequency communication.
Claims (5)
1. A capacitive and inductive surface coupling mechanism miniaturized high-performance high-frequency band communication antenna housing is characterized in that: the antenna housing is a frequency selective surface mainly composed of a periodic unit array, each periodic unit is divided into a dielectric layer and a metal layer, the dielectric layer comprises an upper dielectric layer and a lower dielectric layer and a dielectric layer in the middle of the dielectric layer, and the metal layer comprises a complete metal patch on the outer surfaces of the upper dielectric layer and the lower dielectric layer and a metal gap patch between the adjacent dielectric layers; the electromagnetic wave in the free space is selectively filtered by the antenna housing and then the electromagnetic wave in the required working frequency band is output;
the periodic unit comprises an upper layer metal patch P 1 Upper layer thin medium D 1 Upper metal slit sheet P 2 Medium D with middle layer thickness 2 Lower metal slit sheet P 3 Lower thin medium D 3 And a lower metal patch P 4 The method comprises the steps of carrying out a first treatment on the surface of the Upper layer metal patch P 1 Attached to the upper thin medium D 1 Upper surface, upper layer metal slit sheet P 2 Thin medium D on upper layer 1 With medium D of intermediate layer thickness 2 Between the lower metal slit sheet P 3 Thin medium D located at lower layer 3 With medium D of intermediate layer thickness 2 Between the lower metal patches P 4 Attached to the lower thin medium D 3 A lower surface; wherein the upper layer metal patch P 1 And the lower layer metal patch P 4 The structural dimensions are the same, and the upper metal slit sheet P 2 With underlying metal slit sheet P 3 The structural dimensions are the same, and the upper layer of thin medium D 1 With an underlying thin medium D 3 The structural dimensions are the same;
the upper metal slit sheet P 2 And a lower metal slit sheet P 3 Mainly comprises a duplex-character-shaped metal patch structure (a), a peripheral square ring metal patch (b) and a gap between the two:
the duplex-shaped metal patch (a) is in a cross shape of a Yellow cooling and is positioned in the center of the peripheral square ring metal patch (b); the peripheral square ring metal patch (b) is positioned on the outer ring of the duplex-shaped metal patch (a), and the outer side length is the same as the side length of the periodic unit.
2. The capacitive, inductive surface coupling mechanism miniaturized high-performance high-band communications radome of claim 1, wherein: the upper layer metal patch P 1 And a lower metal patch P 4 Respectively arranged on upper thin medium D 1 With an underlying thin medium D 3 Is defined in the center of the (c).
3. A capacitive and inductive surface coupling mechanism as claimed in claim 1 which is compactThe high-performance high-frequency band communication antenna housing is characterized in that: the upper layer thin medium D 1 Medium D with middle layer thickness 2 And an underlying thin medium D 3 The dielectric constant of (2) was 3.5, and the dielectric loss tangent was 0.0015.
4. A capacitive, inductive surface coupling mechanism miniaturized high-performance high-band communications radome as defined in any one of claims 1-3, wherein: for electromagnetic waves vertically incident to the radome, after passing through each layer of structure of the radome in sequence, the insertion loss of the passband is less than 0.4dB in the range of 27.15GHz-29.65GHz frequency band, and the stop band suppression is more than 20dB in the range of 31.15GHz-33.52GHz frequency band; when the incident electromagnetic wave changes within the incidence angle range of +/-85 DEG of the normal incidence angle, the transmission pole and the zero point of the incident electromagnetic wave are not changed, and the angle and the polarization stability are extremely high.
5. The application of the capacitive and inductive surface coupling mechanism miniaturized high-performance high-frequency band communication antenna housing as claimed in claims 1 to 4, which is characterized in that: the radome is applied to modern communications of 5G, radar and military communications.
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| CN107404005B (en) * | 2017-09-05 | 2023-09-29 | 杭州泛利科技有限公司 | Novel high-selectivity frequency selective surface based on single-layer PCB process |
| CN109509978A (en) * | 2018-12-21 | 2019-03-22 | 海宁利伊电子科技有限公司 | High-performance mobile communication antenna cover |
| CN112421239B (en) * | 2020-11-13 | 2022-02-01 | 中国人民解放军空军工程大学 | Radio frequency inductive coupling plasma superposition broadband band-pass frequency selection surface structure |
| CN113067158B (en) * | 2021-03-02 | 2022-06-17 | 中国人民解放军军事科学院国防科技创新研究院 | Broadband electromagnetic phase-adjustable super-surface structure |
| CN116093590B (en) * | 2023-03-16 | 2023-06-02 | 广东工业大学 | Dual-broadband dual-polarized antenna |
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| CN104617361A (en) * | 2015-03-01 | 2015-05-13 | 中国人民解放军国防科学技术大学 | Three-way bandwidth frequency band frequency selecting surface structure and antenna cover |
| CN104993249A (en) * | 2015-07-23 | 2015-10-21 | 中国人民解放军国防科学技术大学 | Single-passband bilateral wave-absorbing composite metamaterial and radome and antenna system including same |
| CN105244619A (en) * | 2015-11-12 | 2016-01-13 | 电子科技大学 | Double-frequency-band broadband frequency selective surface |
| CN105609903A (en) * | 2015-12-23 | 2016-05-25 | 西安电子科技大学 | Frequency selective surface with high selectivity and angle stability |
| CN105846017A (en) * | 2016-04-19 | 2016-08-10 | 成都德杉科技有限公司 | Frequency selective surface structure with wide passband and ultra-wide stopband |
| CN106025564A (en) * | 2016-06-13 | 2016-10-12 | 西安电子科技大学 | Transmission beam control method employing multi-layer FSSs |
| CN206412472U (en) * | 2017-01-20 | 2017-08-15 | 浙江大学 | Capacitive, perceptual surface coupling mechanism miniaturisation high-performance high band communication antenna cover |
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