CN106602252B - 2.5-dimensional ultra-wideband mobile communication radome with grid square ring loaded via hole structure - Google Patents
2.5-dimensional ultra-wideband mobile communication radome with grid square ring loaded via hole structure Download PDFInfo
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- CN106602252B CN106602252B CN201710041971.4A CN201710041971A CN106602252B CN 106602252 B CN106602252 B CN 106602252B CN 201710041971 A CN201710041971 A CN 201710041971A CN 106602252 B CN106602252 B CN 106602252B
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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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
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Abstract
The invention discloses a 2.5-dimensional ultra-wideband mobile communication antenna housing with a grid square ring loaded via structure. The periodic frequency selective surface mainly comprises a plurality of same periodic unit arrays, wherein each periodic unit mainly comprises an upper dielectric layer, a lower dielectric layer, a metal patch and a metal via hole which are arranged on the dielectric layer, and an air gap layer between the two dielectric layers; the electromagnetic field in the space is incident on the radome, and after selective filtration of the upper medium layer, the air gap layer and the lower medium layer, the electromagnetic field with the required frequency band is output from the lower medium layer, so that clutter energy can be inhibited under the condition that the incident angle of the electromagnetic wave is changed. The invention is suitable for the design of the ultra-wideband mobile communication radome, has large passband bandwidth, extremely small and stable in-band insertion loss, and particularly has stable wideband performance and good frequency selection performance when the incident electromagnetic wave changes at a large angle. Has great application value in the fields of mobile communication, radar, electromagnetic shielding and the like.
Description
Technical Field
The invention relates to an antenna device, in particular to a 2.5-dimensional ultra-wideband mobile communication antenna housing with a grid square ring loaded via structure, which can be used for ultra-wideband (5G) mobile communication.
Background
Currently, all large communication preparation companies around the world start to go without raining the silk-muir, and actively develop a 5G mobile communication network. China also starts the first-stage and second-stage research projects of the 5G mobile network in 2013 and 2014 and brings the first-stage and second-stage research projects into twelve-five and thirteenth-five plans. The 5G mobile network is used as the start of a new round of competition in the global mobile communication field, and has become the primary task of the development of the information technology in China.
Compared with 4G, 5G not only further improves the network experience of users, but also meets the application requirements of future everything interconnection. Compared with the peak rate of 4G/LTE (100 Mbit/s), the peak rate of 5G is expected to reach 10Gbit/s, and according to the fragrance formula, we can know that under the condition of ensuring a certain signal-to-noise ratio, the transmission rate is accelerated to need to increase the passband bandwidth. Therefore, higher requirements are put on hardware equipment for 5G practical application, especially a module of a radome. For 5G communication, it is necessary to design a passband satisfying a bandwidth of more than 2GHz, and to not distort signals, it is necessary to satisfy an insertion loss in such a broadband of at least less than 0.6dB. In addition, in the practical communication environment, when the designed radome needs to meet the large angle change of the incident electromagnetic wave, the selective permeability of the broadband can still reach the index, which is a new challenge.
The implementation of existing radomes generally employs a periodic frequency selective surface structure. Common single-layer or double-layer metal frequency selective surface structures can realize narrow-band spatial filtering or wide-passband spatial filtering with poor selectivity. The poor selectivity refers to unstable insertion loss in the passband, large insertion loss in the passband, excessively slow passband to stopband, and failure to ensure the stopband rejection performance. In addition, in order to ensure angular stability of the radome, more researchers aim to design more miniaturized radomes, while most of their research points focus on complicating the meandering of the structural design, thereby introducing discrete capacitances and inductances. However, as the 5G operating band increases, the periodic structure of the corresponding radome becomes very small, and thus the space available for the meandering design becomes very limited, so the limitations of similar approaches do not manifest themselves.
Disclosure of Invention
Aiming at how to improve the passband characteristic, stopband characteristic and frequency selectivity of the radome, in particular to the stability of electromagnetic waves when incident at a large angle, so as to meet the hardware index requirement of 5G mobile communication, the invention provides a 2.5-dimensional ultra-wideband mobile communication radome with a grid square ring loaded via hole structure.
The invention solves the technical problems by adopting the technical scheme that:
1. 2.5-dimensional ultra-wideband mobile communication antenna housing with grid square ring loaded via hole structure:
the antenna housing is a periodic frequency selective surface mainly composed of a plurality of same periodic unit arrays, and each periodic unit mainly comprises an upper dielectric layer, a lower dielectric layer, a metal patch and a metal via hole which are arranged on the dielectric layer, and an air gap layer between the two dielectric layers; the electromagnetic field in the space is incident on the radome, and after selective filtration of the upper medium layer, the air gap layer and the lower medium layer, the electromagnetic field with the required frequency band is output from the lower medium layer, and clutter energy can be restrained under the condition that the incident angle of the electromagnetic wave is changed.
The number of the periodic unit structures of the present invention may be selected to be between 20×20 and 40×40 according to practical use.
The periodic unit comprises an upper metal patch, an upper dielectric plate, an air gap layer, a lower dielectric plate and a lower metal patch, wherein a gap serving as the air gap layer is arranged between the upper dielectric plate and the lower dielectric plate; the electromagnetic field in the space is incident from the upper dielectric plate, and the antenna housing sequentially passes through the upper metal patch, the upper metal via hole, the air gap layer, the lower metal via hole and the lower metal patch for selective filtering, and then outputs the electromagnetic field with the required frequency band from the lower metal patch, so that the clutter energy can be greatly restrained within the incidence wide angle variation range.
The upper layer metal patch comprises an upper layer metal patch inner square ring and an upper layer metal patch outer square ring which are square-shaped and respectively arranged inside and outside the center of the upper surface of the upper layer dielectric plate, the outer side lengths of the upper layer metal patch outer square ring and the upper layer dielectric plate are the side lengths of periodic units, and the upper layer metal patch inner square ring and the upper layer metal patch outer square ring are concentrically arranged; the lower metal patch comprises a square ring-shaped lower metal patch inner square ring and a lower metal patch outer square ring which are respectively arranged inside and outside the center of the lower surface of the lower dielectric plate, the outer side lengths of the lower metal patch outer square ring and the lower dielectric plate are the side lengths of periodic units, and the lower metal patch inner square ring and the lower metal patch outer square ring are concentrically arranged.
The arrangement structure and the size of the upper metal via holes and the lower metal via holes are the same, namely the distribution mode of the lower metal via holes and the upper metal via holes are symmetrically distributed in the Z direction, and the sizes of the lower metal via holes and the upper metal via holes are the same.
The upper metal via holes comprise four inner metal via holes which are respectively arranged at four corners of an inner square ring of the upper metal patch and eight outer metal via holes which are respectively arranged at four corners of an outer square ring of the upper metal patch, the eight outer metal via holes are formed in pairs by two pairs, the four pairs of outer metal via holes are respectively positioned near the four corners of the outer square ring of the upper metal patch, and each pair of outer metal via holes is respectively positioned on extension lines of two edges of the corresponding inner square ring of the upper metal patch.
The lower metal via holes comprise four inner metal via holes which are respectively arranged at four corners of an inner square ring of the lower metal patch and eight outer metal via holes which are respectively arranged at four corners of an outer square ring of the lower metal patch, the eight outer metal via holes are formed in pairs, the four pairs of outer metal via holes are respectively positioned near the four corners of the outer square ring of the lower metal patch, and each pair of outer metal via holes are respectively positioned on extension lines of two sides of the corresponding inner square ring of the lower metal patch.
Preferably, the dielectric constants of the upper dielectric plate and the lower dielectric plate are 2.2 and the dielectric loss tangent is 0.0009. The losses are small relative to other media.
The metal through holes penetrating the upper surface and the lower surface along the normal direction (Z coordinate direction) of the dielectric plate can increase the effective inductance and capacitance of the metal patch, the size of the periodic unit is greatly reduced by the metal through holes in the other dimension along the normal direction of the dielectric plate in the limited space of the periodic unit, the incident electromagnetic wave is enabled to change within the angle range of 60 degrees along the normal direction of the dielectric plate, and the antenna housing still maintains the selective permeability of the bandwidth.
2. The invention relates to an application of a 2.5-dimensional ultra-wideband mobile communication antenna housing with a grid square ring loaded via hole structure in 5G mobile communication.
The antenna cover has high and stable selective permeability to electromagnetic waves in space through ingenious insertion of the metal via holes in the Z coordinate direction and combination of the grid square ring type metal patch structure, and the antenna cover still maintains the selective permeability of bandwidth when the incident electromagnetic waves change from-60 degrees to +60 degrees in a large angle.
Under the condition of normal incidence of space electromagnetic waves, the insertion loss smaller than 0.6dB is realized within a wide passband range of 26.9 GHz-29.5 GHz, and the stop band suppression within the range of 30.5 GHz-43.0 GHz out of band is more than 20dB while the passband requirement is met. And the descent speed of the passband to the stopband is very fast, and the passband has good frequency selectivity. Finally, the method can be widely applied to 5G mobile communication.
The antenna housing structure is suitable for processing and realizing the traditional PCB technology.
The invention has the beneficial effects that:
the two-level linkage mode of the external square ring junction metal via hole designed by the invention provides a passband with stable and extremely small insertion loss and large bandwidth for the radome, and the insertion loss is less than 0.6dB in the passband range of 26.9 GHz-29.5 GHz under the condition of normal incidence of electromagnetic waves; in the passband range of 26.0 GHz-30.0 GHz, the insertion loss is extremely small and less than 3dB, and particularly, the broadband performance of the incident electromagnetic wave is stable when the incident electromagnetic wave changes at a large angle, and the frequency selection performance is good. .
The two-level linkage mode of the inner square ring combined with the metal via hole provides a stop band with large out-of-band rejection and wider range for the radome. Under the condition of normal incidence, the stop band suppression is more than 20dB in the stop band range of 30.5 GHz-43.0 GHz.
The highly symmetrical structure designed by the invention enables the radome to simultaneously support the polarization modes of TE and TM electromagnetic waves.
According to the invention, as the plurality of metal through holes are added in the dimension of the Z direction, the size of the antenna housing unit becomes miniaturized, so that the performance is still very stable in a large angle change range of plus or minus 60 degrees of an incident electromagnetic wave.
The invention has important application value in the fields of ultra-wideband mobile communication, radar, electromagnetic shielding and the like.
Drawings
Fig. 1 is a schematic three-dimensional structure of a radome according to the present invention (only 4×4 units are shown in the figure, but not limited thereto).
Fig. 2 is a three-dimensional structural view of a periodic cell structure in the present invention.
Fig. 3 is a front view of the periodic unit structure in the present invention.
Fig. 4 is a three-dimensional structural view of one layer of the periodic cell structure in the present invention.
Fig. 5 is a plan view of a periodic cell structure in the present invention.
Fig. 6 is a graph showing the effect of different incident angles on the performance of the radome in the TM mode.
Fig. 7 is a graph showing the effect of different incident angles on the performance of the radome in the TE mode.
In the figure: 1. the upper layer metal patch outer square ring, 2, upper layer metal patch inner square ring, 3, upper layer metal via hole, 4, upper layer dielectric plate, 5, air gap layer, 6, lower layer dielectric plate, 7, lower layer metal via hole, 8, lower layer metal patch inner square ring, 9, lower layer metal patch outer square ring.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1, the radome is embodied as a periodic frequency selective surface consisting essentially of a plurality of arrays of identical periodic elements.
As shown in fig. 2, the periodic unit includes upper metal patches 1 and 2, an upper dielectric plate 4, an air gap layer 5, a lower dielectric plate 6 and lower metal patches 8 and 9, a gap serving as the air gap layer 5 is arranged between the upper dielectric plate 4 and the lower dielectric plate 6, the upper metal patches 1 and 2 are attached to the upper surface of the upper dielectric plate 4, the lower metal patches 8 and 9 are attached to the lower surface of the lower dielectric plate 6, the upper metal patches and the lower metal patches have the same structural size, and an upper metal via hole 3 and a lower metal via hole 7 penetrating through the upper surface and the lower surface of the upper dielectric plate 4 and the lower dielectric plate 6 are respectively formed in the upper dielectric plate 4 and the lower dielectric plate 6; the electromagnetic field in the space is incident from the upper dielectric plate 4, and the radome sequentially passes through the upper metal patches 1 and 2, the upper metal via holes 3, the air gap layer 5, the lower metal via holes 7 and the lower metal patches 8 and 9, and then outputs the electromagnetic field with the required frequency band from the lower metal patches 8 and 9, so that the clutter energy can be greatly restrained within the incidence wide angle variation range.
As shown in fig. 4 and 5, for the patch arrangement, the upper metal patches 1, 2 include square rings and are respectively arranged in an upper metal patch inner square ring 2 and an upper metal patch outer square ring 1 inside and outside the center of the upper surface of the upper dielectric plate 4, and the outer side lengths of the upper metal patch outer square ring 1 and the upper dielectric plate 4 are both periodic unit side lengths, and the upper metal patch inner square ring 2 and the upper metal patch outer square ring 1 are concentrically arranged. The lower metal patch 8, 9 comprises a lower metal patch inner square ring 8 and a lower metal patch outer square ring 9 which are square ring-shaped and respectively arranged inside and outside the center of the lower surface of the lower dielectric plate 6, the outer side lengths of the lower metal patch outer square ring 9 and the lower dielectric plate 6 are both periodic unit side lengths, and the lower metal patch inner square ring 8 and the lower metal patch outer square ring 9 are concentrically arranged. The upper metal patch inner square ring 2 and the lower metal patch inner square ring 8 are respectively positioned in the upper metal patch outer square ring 1 and the lower metal patch outer square ring 9 with larger sizes.
As shown in fig. 3, 4 and 5, for the via arrangement, the upper metal vias 3 and the lower metal vias 7 are arranged in the same structure and size, i.e. the lower metal vias 7 are distributed symmetrically with the upper metal vias in the Z direction and in the same size. The upper metal via hole 3 comprises four inner metal via holes respectively arranged at four corners of the upper metal patch inner square ring 2 and eight outer metal via holes respectively arranged at four corners of the upper metal patch outer square ring 1, wherein the eight outer metal via holes are formed in pairs by two pairs, the four pairs of outer metal via holes are respectively positioned near the four corners of the upper metal patch outer square ring 1, and each pair of outer metal via holes is respectively positioned on extension lines of two sides of the corresponding upper metal patch inner square ring 2, so that the eight outer metal via holes of the four pairs of outer metal via holes are arranged in a central symmetry manner in a regular manner. The lower metal via hole 7 comprises four inner metal via holes respectively arranged at four corners of the lower metal patch inner square ring 8 and eight outer metal via holes respectively arranged at four corners of the lower metal patch outer square ring 9, wherein the eight outer metal via holes are formed in pairs in four pairs, the four pairs of outer metal via holes are respectively positioned near the four corners of the lower metal patch outer square ring 9, and each pair of outer metal via holes is respectively positioned on extension lines of two sides of the corresponding lower metal patch inner square ring 8, so that the eight outer metal via holes of the four pairs of outer metal via holes are arranged in a central symmetry manner in a regular mode.
The working design principle of the whole antenna housing is as follows:
(a) The outer square ring of the metal patch in one periodic unit on the substrate is equivalent to an inductor because the outer square ring of the metal patch of the next adjacent periodic unit is directly connected with the outer square ring of the metal patch.
(b) The inner square ring of the metal patch is regarded as an inductor, and the gap between the inner square ring and the outer square ring of the metal is equivalent to a capacitor, so that the metal patch is in series resonance as a whole, and a transmission zero point (a point on a stop band) is provided. The series LC circuit provides a pole (a point on the passband) of the transmission after being connected in parallel with the inductance equivalent to the outer square loop metal.
(c) To make the radome more stable to angles, vias in the Z-coordinate direction are introduced. The via hole is equivalent to an inductor, and a capacitor can be equivalent between the via hole under the outer square ring and the via hole under the inner square ring due to gaps. Therefore, inductance and capacitance in LC resonance are effectively improved, so that resonance frequency is reduced. In other words, due to the reduction of the resonant frequency, the periodic structure is designed to be more miniaturized to counteract the electrical characteristics introduced by the vias, whereas the miniaturized structure will become less sensitive to angular variations of the incident electromagnetic wave.
(d) Through cascade connection of the upper layer structure and the lower layer structure, the original narrowband characteristic of a single layer is changed into the broadband characteristic. In order to better match the two layers and prevent the metal vias between the upper and lower layers from affecting each other, an air isolation layer is designed between the two layers. Thus, clutter can be restrained in large bandwidth amplitude within the incidence large angle change range.
The embodiment of the invention takes the radome working in the 5G mobile communication frequency band as an example, and specifically describes the implementation modes of each part and the influence of the structural parameters of each part on the whole:
the most likely international adoption of 5G mobile communication is now that the bandwidth is 2GHz at the frequency band of 27.5 GHz-29.5 GHz, and the bandwidth is obviously increased compared with the prior 4G communication modes and the like. While meeting broadband, there is a need for an antenna system that operates stably in a complex environment, i.e., selectively transmitting electromagnetic waves incident at various angles, which has not been a challenge for previous communication systems.
For such applications, conventional radomes made with single or double layer frequency selective surface structures have been difficult to meet. The invention innovatively utilizes the idea of increasing the effective electric length of the via hole, reduces the size of the periodic unit, can meet the bandwidth requirement only by cascading two layers of structures, has small in-band insertion loss and large out-of-band rejection, and has steep characteristics from the passband to the stop band. The performance is very stable over 60 degrees at normal incidence.
Embodiments of the invention are as follows:
as shown in fig. 1 and 2, the embodiment adopts 20×20 identical periodic units, and the upper layer outer annular metal patch 1 and the lower layer outer annular metal patch 9 of each periodic unit structure are metal patches with outer length of 2.27mm and width of 0.20 mm. From the perspective of the equivalent circuit, the influence of the side length and the width dimension of the outer square ring on the overall performance of the radome can be clearly analyzed.
First, if the width of the outer square ring becomes large, this means that the gap between the outer square ring and the inner square ring is reduced, that isThe series capacitance of the stop band becomes large, which is equal to the series resonance frequencyTo analyze, the stopband center frequency of the radome will move low. For the passband, since the effect of the series capacitance is greater than the effect of the inductance, the passband center frequency of the radome will also move down as well as the stopband, and cause a reduction in passband width.
Secondly, when the width is fixed, the increase of the side length of the outer square ring is equivalent to the reduction of the equivalent inductance of the outer square ring, so that the influence on the performance of the radome is exactly opposite to the influence of the increase of the width. At this time, the center frequencies of the pass band and the stop band are shifted to the higher position, and the pass band width is increased. Table 1 specifically illustrates the effect of the outer ring metal patch side length and width dimensions on performance.
TABLE 1 influence of side Length and Width dimension of outer ring Metal Patch on Performance
Note that: passband center frequency= (transmission pole 1+transmission pole 2)/2;
stop band center frequency= (transmission zero 1+transmission zero 2)/2.
The upper dielectric plate 4 and the lower dielectric plate 6 adopt Rogers RT5880 plates with the periodic unit thickness of 0.38mm and the square side length of 2.27mm, and the reason for selecting the dielectric is that the material loss is small, so that the influence of the material on the insertion loss of a pass band can be reduced to a certain extent. Other low cost materials with relatively small material losses and similar dielectric constants may also be selected in view of the cost of large scale use. The effect of the period length of the array on the overall performance of the structure is the same as that of the outer square ring side length dimension, and the variation trend is shown in table 1.
The upper inner annular metal patch 2 and the lower outer annular metal patch 8 of each periodic unit structure are metal patches with the side length of 1.32mm and the width of 0.02 mm. Also from the perspective of the equivalent circuit, the increase in the side length of the inner square ring will make the distance between the inner square ring metal and the outer square ring metal smaller, meaning that the capacitance equivalent to the gap between the two will become larger, thus making the series resonant frequency move to the lower position. The center frequencies of the pass band and the stop band are reflected in performance to move to the lower part, and the bandwidth of the pass band becomes smaller. Secondly, under the condition of a certain side length, only increasing the width of the inner square ring is equivalent to enabling the gaps between the inner square ring and the outer square ring to be the same, only changing the equivalent inductance of the inner square ring, and the larger the width is, the smaller the equivalent inductance is. Therefore, the radome operating frequency will move higher, and the passband width will increase. Table 2 specifically illustrates the effect of the inner square ring metal patch side length and width dimensions on performance.
TABLE 2 influence of side Length and Width dimension of inner Square Ring Metal Patch on Performance
In addition, the core innovation point of the structural design is that a plurality of metal through holes with one ends connected with the metal square ring are inserted. In principle, it increases the effective electrical length of square ring resonance in the Z-dimension. However, the design of the conventional radome is generally optimized only in the X-Y direction, and the design of the light in the X-Y direction has a very limited design as the operating frequency increases. On the other hand, the increase of the length of the power in the Z direction can greatly reduce the size in the X-Y direction, so that the size of the radome becomes small, the size is less sensitive to the wavelength of electromagnetic waves, and the broadband performance of the radome is still very stable and excellent when the incident electromagnetic waves change at a large angle. Fig. 6 and 7 show the transmission characteristics of the radome under the incidence of electromagnetic waves in two different modes, namely TM and TE, respectively, and it can be found that the broadband characteristics are still very stable when the electromagnetic waves in two modes are incident at different angles of plus or minus 60 degrees. In the frequency band of 5G work, the performance is still very excellent, which is difficult to see in the published domestic and foreign papers.
The diameter and number of vias can have an impact on the specific performance of the radome. First, considering the number of vias, it is natural that the greater the number of arrangements, the greater the effective electrical length of the resonance. However, considering that the working frequency band of the whole structure is high, the size is small, so that no space is inserted into too many through holes. In addition, the placement of the metal vias near the four corners of the metal square ring is better than the placement near the middle of the metal square ring, because placement near the corners is equivalent to directly connecting the via inductor in series to the square ring inductor, while placement near the middle of the square ring has a portion of the inductor effect connected in parallel. Thus, in the present invention, we have the vias most efficiently aligned in the position as in fig. 2 and 5. The effect of the via diameter size is that if the via diameter becomes larger, it means that the equivalent inductance of the via becomes smaller, but at the same time the effect is larger than the distance between the via under the inner square ring and the via under the outer square ring. The increase in via diameter means that the distance of the via under the inner square ring and the outer square ring is reduced, and the equivalent resonance capacitance increases rapidly, resulting in the resonance frequency shifting down as a whole. Table 3 specifically illustrates the effect of via diameter size on performance.
TABLE 3 influence of via diameter size on performance
The transmission characteristic curves of the overall structure of the embodiment are shown in fig. 6 and 7, and the insertion loss is less than 0.6dB in the passband range of 26.9 GHz-29.5 GHz under the condition of considering normal incidence of electromagnetic waves; the insertion loss is less than 3dB in the passband range of 26.0 GHz-30.0 GHz; in the aspect of the stop band, in the stop band range of 30.5 GHz-43.0 GHz, the stop band inhibition is more than 20dB. Meanwhile, the TE and TM polarization modes are supported, the performance is still very stable within a large angle change range of plus or minus 60 degrees, and the actual 5G communication environment requirement is met. Therefore, the method has important application value in the fields of ultra-wideband mobile communication, radar, electromagnetic shielding and the like.
Therefore, the invention has remarkable technical effect, realizes that the passband loss of near 2.6GHz bandwidth is stably smaller than 0.6dB under the condition of normal incidence of electromagnetic waves, and the stop band inhibition within the large bandwidth range of 12.5GHz is larger than 20dB. Meanwhile, the TE and TM polarization modes are supported, and the broadband performance is very excellent within a large angle change range of plus or minus 60 degrees of an incident electromagnetic wave.
Claims (5)
1. A2.5-dimensional ultra-wideband mobile communication antenna housing with a grid square ring loaded via hole structure is characterized in that: the antenna housing is a periodic frequency selective surface mainly composed of a plurality of same periodic unit arrays, and each periodic unit mainly comprises an upper dielectric layer, a lower dielectric layer, a metal patch and a metal via hole which are arranged on the dielectric layer, and an air gap layer between the two dielectric layers; the electromagnetic field in the space is incident on the radome, and after selective filtration of the upper medium layer, the air gap layer and the lower medium layer, the electromagnetic field with the required frequency band is output from the lower medium layer, and clutter energy can be restrained under the condition that the incident angle of the electromagnetic wave is changed;
the periodic unit comprises upper metal patches (1, 2), an upper dielectric plate (4), an air gap layer (5), a lower dielectric plate (6) and lower metal patches (8, 9), a gap serving as the air gap layer (5) is arranged between the upper dielectric plate (4) and the lower dielectric plate (6), the upper metal patches (1, 2) are attached to the upper surface of the upper dielectric plate (4), the lower metal patches (8, 9) are attached to the lower surface of the lower dielectric plate (6), the upper metal patches and the lower metal patches are identical in structural size, and an upper metal via hole (3) and a lower metal via hole (7) penetrating through the upper surface and the lower surface of the plate are respectively formed in the upper dielectric plate (4) and the lower dielectric plate (6);
the upper metal patch (1, 2) comprises an upper metal patch inner square ring (2) and an upper metal patch outer square ring (1) which are square-shaped and respectively arranged inside and outside the center of the upper surface of the upper dielectric plate (4), and the outer side lengths of the upper metal patch outer square ring (1) and the upper dielectric plate (4) are both periodic unit side lengths;
the lower metal patch (8, 9) comprises a lower metal patch inner square ring (8) and a lower metal patch outer square ring (9) which are square-shaped and respectively arranged inside and outside the center of the lower surface of the lower dielectric plate (6), and the outer side lengths of the lower metal patch outer square ring (9) and the lower dielectric plate (6) are both periodic unit side lengths;
the upper metal via holes (3) and the lower metal via holes (7) are identical in arrangement structure and size, the upper metal via holes (3) comprise four inner metal via holes which are respectively arranged at four corners of an inner square ring (2) of the upper metal patch and eight outer metal via holes which are respectively arranged at four corners of an outer square ring (1) of the upper metal patch, the eight outer metal via holes are formed in pairs by taking two pairs as four pairs, the four pairs of outer metal via holes are respectively located near the four corners of the outer square ring (1) of the upper metal patch, and each pair of outer metal via holes are respectively located on extension lines of two edges of the corners of the inner square ring (2) of the upper metal patch.
2. The 2.5-dimensional ultra-wideband mobile communication radome with a grid square ring loaded via structure of claim 1, wherein:
the electromagnetic field in the space is incident from the upper layer dielectric plate (4), the radome sequentially passes through the upper layer metal patches (1 and 2), the upper layer metal via holes (3), the air gap layer (5), the lower layer metal via holes (7) and the lower layer metal patches (8 and 9), and after selective filtration, the electromagnetic field with the required frequency band is output from the lower layer metal patches (8 and 9), so that the clutter energy can be greatly restrained within the incidence wide angle variation range.
3. The 2.5-dimensional ultra-wideband mobile communication radome with a grid square ring loaded via structure of claim 1, wherein: the dielectric constants of the upper dielectric plate (4) and the lower dielectric plate (6) are 2.2, and the dielectric loss tangent is 0.0009.
4. The 2.5-dimensional ultra-wideband mobile communication radome with a grid square ring loaded via structure of claim 1, wherein: the metal vias (3, 7) penetrating the upper and lower surfaces along the normal direction (Z coordinate direction) of the dielectric plate can increase the effective inductance and capacitance of the metal patch, the size of the periodic unit is reduced by the metal vias (3, 7) in the limited space of the periodic unit, the incident electromagnetic wave is enabled to change within the 60-degree angle range along the normal direction of the dielectric plate, and the antenna housing still maintains the selective permeability of the bandwidth.
5. The use of a 2.5-dimensional ultra-wideband mobile communication radome with a grid square ring loaded via structure of any one of claims 1-4, wherein: application of the radome in 5G mobile communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710041971.4A CN106602252B (en) | 2017-01-20 | 2017-01-20 | 2.5-dimensional ultra-wideband mobile communication radome with grid square ring loaded via hole structure |
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|---|---|---|---|
| CN201710041971.4A CN106602252B (en) | 2017-01-20 | 2017-01-20 | 2.5-dimensional ultra-wideband mobile communication radome with grid square ring loaded via hole structure |
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| Publication Number | Publication Date |
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| CN107171043B (en) * | 2017-06-02 | 2020-01-21 | 南京航空航天大学 | Ultra-wide passband frequency selective surface with improved angular stability |
| 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 |
| CN109560374B (en) * | 2018-11-22 | 2021-01-05 | 西安电子科技大学 | High-gain low-radar-section Fabry-Perot antenna |
| CN110311228B (en) * | 2019-06-27 | 2021-04-06 | 西安理工大学 | 2.5D ultra-wideband frequency selection surface structure applied to ultra-wideband antenna |
| CN110690577A (en) * | 2019-09-17 | 2020-01-14 | 淮安信息职业技术学院 | Dual-polarization band-pass three-dimensional frequency selection surface with bilateral steep drop characteristic |
| CN110635242B (en) * | 2019-09-30 | 2021-09-14 | Oppo广东移动通信有限公司 | Antenna device and electronic apparatus |
| CN110676592B (en) * | 2019-11-04 | 2021-06-29 | 淮安信息职业技术学院 | Dual-polarized three-order band-pass three-dimensional frequency selection surface |
| CN111342179B (en) * | 2020-04-14 | 2021-02-02 | 南京航空航天大学 | 2.5D miniaturized electromagnetic band gap structure for microwave circuit module package |
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| CN112751205B (en) * | 2020-12-25 | 2021-11-05 | 南京航空航天大学 | Double-layer medium 2.5-dimensional band-stop frequency selection surface |
| CN113675605B (en) * | 2021-08-25 | 2022-09-13 | 浙江大学 | Simple omnidirectional perfect transparent invisible radome |
| CN116845583B (en) * | 2023-08-11 | 2024-08-27 | 成都辰星迅联科技有限公司 | Millimeter wave ultra-large frequency ratio wide bandwidth angular frequency selection surface |
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