CN105914462B - Based on antenna-filter-aerial array ultra wide band mobile communication antenna cover - Google Patents
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
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Classifications
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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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- 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
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Abstract
The invention discloses a kind of based on antenna-filter-aerial array ultra wide band mobile communication antenna cover.The antenna house is mainly to select surface by the periodic frequency that multiple same period cellular construction arrays form, each periodic unit is mainly by bilevel dielectric layer, metal slit layer composition between bilevel circular ring metal patch layer and two layers of dielectric layer, electromagnetic field in space is beaten to the antenna house, successively after the three layer-selectives filtering by upper metal layers, metal slit layer and lower metal layer, from lower metal layer export needed for frequency range electromagnetic field, and can significantly clutter reduction energy.The present invention is suitable for the design of ultra wide band mobile communication antenna cover, and pass band width is big, and in-band insertion loss is minimum and stablizes, and frequency selectivity can be good.In mobile communication, the fields such as radar all have huge application value.
Description
Technical field
The present invention relates to a kind of antenna devices, are based on antenna-filter-aerial array more particularly, to a kind of
(Antenna-Filter-Antenna) ultra wide band mobile communication antenna cover can be used for ultra wide band (5G) mobile communication,
Background technique
Currently, extremely urgent for the demand of 5G mobile communication in the world, the 5G network of European Union will the year two thousand twenty~
It puts into effect between 2025.Mobile operator Verizon wireless company of the U.S. announces, 5G net will be tried out since 2016
Network, 2017 U.S. part city comprehensively it is commercial in the future days.Ministry of Industry and Information of China vice-minister Chen Zhaoxiong indicates that: 5G is
The Main way of Technology of New Generation Mobile Communications development, is the important component of future new era information infrastructure.
Compared with 4G, 5G will also meet the following all things on earth interconnection not only by the further web experience for promoting user
Application demand.5G has higher rate, broader bandwidth.Therefore, the hardware device of 5G practical application is proposed higher
It is required that especially this module of antenna house.For the so big bandwidth of 5G communication, to meet the passband greater than 2GHz bandwidth, and
And in order not to make distorted signals, need to meet the insertion loss in such broadband at least below 0.6dB.This be undoubtedly one it is new
Challenge.
The implementation of existing antenna house is generally adopted by periodic frequency selection surface texture.For this structure
Research, have gone through many years both at home and abroad.Common single layer or double-level-metal frequency-selective surfaces structure may be implemented
The space filtering of narrowband, or the space filtering of selective poor broad passband.Here selectivity is poor to be referred in passband
Insertion loss it is unstable, the insertion loss in passband is larger and passband is to the excessively relatively slow of stopband, not can guarantee stopband
Rejection.
Summary of the invention
For the pass-band performance for how improving antenna house, the selectivity of stopband characteristic and frequency, so that it is mobile to meet 5G
This problem of communicating requirement proposes a kind of based on antenna-filter-aerial array (Antenna-Filter-Antenna)
Ultra wide band mobile communication antenna cover has the electromagnetic wave in space the selection of height by the ingehious design of three-layer metal layer
Permeability.The present invention realizes within the scope of the broad passband of 26.1~28.9GHz and is less than in the case where spatial electromagnetic wave normal incidence
The insertion loss of 0.1dB, while meeting passband requirements, for inhibiting super with the stopband within the scope of outer 31.4~34.3GHz
Cross 20dB.And the decrease speed of passband to stopband is fast, has good frequency selectivity.
The technical solution adopted by the present invention to solve the technical problems:
The antenna house is mainly to select surface by the periodic frequency that multiple same period cellular construction arrays form, often
A periodic unit is mainly by between bilevel dielectric layer, bilevel circular ring metal patch layer and two layers of dielectric layer
Metal slit layer composition, the electromagnetic field in space are beaten to the antenna house, successively pass through upper metal layers, metal slit layer and under
After the three layer-selectives filtering of layer metal layer, the electromagnetic field of required frequency range is exported from lower metal layer, and can significantly inhibit miscellaneous
The energy of wave.The number of periodic unit structure of the present invention can select between 20 × 20 to 40 × 40 according to practical use.
The periodic unit include upper layer metal patch, top dielectric plate, metallic intermediate layer plate, layer dielectric plate and under
Layer metal patch, for metallic intermediate layer plate between top dielectric plate and layer dielectric plate, upper layer metal patch is affixed on upper layer Jie
Scutum upper surface, lower metal patch are affixed on layer dielectric plate lower surface, upper layer metal patch and lower metal paster structure ruler
It is very little identical.
The metallic intermediate layer plate is equipped with metallic intermediate layer gap, and metallic intermediate layer gap includes square-loop slot element and position
In four zigzag gaps at center in square-loop slot element, with spiral center symmetric mode, circumferentially interval is equal in four zigzag gaps
Cloth, zigzag gap are divided into inner segment gap, middle section gap and outer segment gap, inner segment seam by metallic intermediate layer plate center outward
Wherein a line, middle section gap are parallel to metallic intermediate layer plate another each parallel to metallic intermediate layer plate for gap and outer segment gap
Side, the length in inner segment gap are greater than the length in outer segment gap.
The center of symmetrical centre and square-loop slot element that four zigzag gaps are formed is respectively positioned on metallic intermediate layer plate
Center.
The upper layer metal patch and lower metal patch is the circular ring metal patch for being placed in dielectric-slab center.
The dielectric constant of the dielectric layer is 2.2, dielectric loss angle tangent 0.0009.
The dielectric layer uses Rogers RT5880 plate, by the size and shape for designing metallic intermediate layer gap
Change the coupling between circular ring metal layer up and down, so that spatial electromagnetic wave is in the case where normal incidence, in 26.1~28.9GHz
Free transmission range in insertion loss be less than 0.1dB.
Two, application of the antenna house in 5G mobile communication.
What the present invention had has the advantages that:
Inventive antenna cover structure is suitable for traditional PCB technique and carries out processing realization.
Identical circular ring shape patch mentions with upper and lower two for antenna house in zigzag gap among metal slit layer of the invention
Stablize the very big passband of minimum and bandwidth for an insertion loss, electromagnetic wave in the case where normal incidence, 26.1~
In the free transmission range of 28.9GHz, insertion loss is less than 0.1dB；In the free transmission range of 25.7~29.2GHz, insertion loss is less than
0.3dB；
The rectangular gap of intermetallic metal layer slot of the present invention for antenna house provides one, and Out-of-band rejection is larger and range is wider
Stopband.Electromagnetic wave is in the case where normal incidence, and in the stopband range of 31.4~34.3GHz, stopband inhibits to be greater than 20dB.
The present invention supports TE, two kinds of polarization of electromagnetic wave modes of TM, the property within the scope of positive and negative 30 degree of angle change simultaneously
It can be highly stable.
The present invention has important application value in the fields such as ultra wide band mobile communication and radar.
Detailed description of the invention
Fig. 1 is the antenna house tomograph of the embodiment of the present invention.
Fig. 2 is the tomograph of periodic unit structure in the present invention.
Fig. 3 is the front view of periodic unit structure in the present invention.
Fig. 4 is the topology view of middle layer intermediate plate.
Fig. 5 is influence curve of the electromagnetic wave incident angle for the antenna house performance in the present invention.
Fig. 6 is the transfer curve of antenna house in the present invention.
In figure: 1, upper layer metal patch, 2, top dielectric plate, 3, metallic intermediate layer gap, 4, layer dielectric plate, 5, lower layer
Metal patch, 3a, zigzag gap, 3b, square-loop slot element.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As depicted in figs. 1 and 2, antenna house of the invention is the week being mainly made of multiple same period cellular construction arrays
Phase resistant frequency selects surface, and each periodic unit is mainly by bilevel dielectric layer, bilevel circular ring metal patch
Metal slit layer between layer and two layers of dielectric layer forms, and the electromagnetic field in space is beaten to the antenna house, successively by upper layer
After the three layer-selectives filtering of metal layer, metal slit layer and lower metal layer, the electricity of required frequency range is exported from lower metal layer
Magnetic field, and can significantly clutter reduction energy.
As shown in Figures 2 and 3, periodic unit include upper layer metal patch 1, top dielectric plate 2, metallic intermediate layer plate, under
Layer dielectric-slab 4 and lower metal patch 5, metallic intermediate layer plate is between top dielectric plate 2 and layer dielectric plate 4, upper layer gold
Belong to patch 1 and be affixed on 2 upper surface of top dielectric plate, lower metal patch 5 is affixed on 4 upper surface of layer dielectric plate, upper layer metal patch 1
It is circular ring metal patch with lower metal patch 5, structure size is identical.
As shown in figure 4, metallic intermediate layer plate is equipped with metallic intermediate layer gap 3, metallic intermediate layer gap 3 includes square annulus
Gap 3b and in square-loop slot element 3b center four zigzag gap 3a, four zigzag gap 3a with spiral center symmetrically side
Formula circumferentially uniformly at intervals, zigzag gap 3a by metallic intermediate layer plate center be divided into outward inner segment gap, middle section gap and
Wherein a line, middle section gap are parallel to centre each parallel to metallic intermediate layer plate for outer segment gap, inner segment gap and outer segment gap
Layer the another a line of metal plate, middle section gap be connected between inner segment gap and outer segment gap, middle section gap respectively with inner segment gap,
Outer segment gap is perpendicular, and the length in inner segment gap is greater than the length in outer segment gap, the symmetrical centre that four zigzag gap 3a are formed
The center of metallic intermediate layer plate is respectively positioned on the center of square-loop slot element 3b.
The working principle of entire antenna house is as follows:
(a) two layers of circular patch layer on substrate can be respectively seen as transmitting and the receiving antenna of outer layer, and itself is
For the unit of two resonance, it can be equivalent to series resonant tank respectively.
(b) the metal slit layer sheet between the substrate of two sides is embedded in as a bandpass structures.And we are by gap here
It is designed to resonant element, the filtering of a high-order is formed together with metal patch.
(c) ingenious to joined a Fang Huan in metal slit layer in order to make antenna house that there is preferably selective penetrated property
The gap of shape, so that the characteristic that the transmission response of the structure has passband precipitous toward stopband.
The embodiment of the present invention is specifically described the implementation of various pieces for working in the antenna house of 5G mobile communication frequency range
The structural parameters of mode and each section are for whole influence:
In 27.5GHz or so, the band of covering is wider than the frequency range that 5G mobile communication is most possibly used by the world now
2GHz, while the Insertion Loss in band is smaller better for the effect of practical communication.For such practical application, traditional single layer
Or antenna house made by the double-deck Compact frequency selective surface structure has been difficult meet demand.And three ranks filter proposed by the present invention
The Compact frequency selective surface structure of wave not only meets bandwidth range, but also the Insertion Loss in band has been accomplished to be less than 0.1dB, Out-of-band rejection
Greatly, and passband toward stopband have precipitous characteristic.
As shown in Figure 1, embodiment uses 20 × 20 periodic units, the upper layer metal patch 1 of each periodic unit structure
It is outer diameter 1.35mm, the metal ring of internal diameter 1.05mm with lower metal patch 5.Its size is decided by the frequency of intended pass-band
Rate.Individually increase the outer diameter of metal ring, the resonance frequency of passband can decrease, and the bandwidth for transmitting passband reduces, in band
It rises and falls and reduces.The electric size of upper and lower metal ring can be made to increase this is because individually increasing the outer diameter of metal ring, caused humorous
Vibration frequency moves to the lower.And the length in the coupling gap in the 3a of zigzag gap can not provide enough stiffness of couplings at this time, lead
The bandwidth of passband is caused to reduce therewith.Individually increase the outer diameter of metal ring, the resonance frequency of passband can decrease, and transmit logical
The bandwidth of band reduces, and pass band insertion loss increases.Wherein, the reason of causing resonance frequency to move to the lower is still metal ring
Electric size is increased.And causing the bandwidth for transmitting passband to reduce with the reason of insertion loss increase is then with round metal ring width
The reduction of degree, the provided coupling of upper and lower metal ring reduce therewith, are not enough to provide a biggish bandwidth.The following table 1 is specific
Elaborate influence of the metal patch outer diameter and inner diameter size for passband effect.
Influence of the 1 metal patch outer diameter and inner diameter size of table for passband effect
Top dielectric plate 2 and layer dielectric plate 4 use the Rogers of periodic unit thickness 0.7mm, square length and width 6.2mm
RT5880 plate, the reason of selecting this medium are that its material loss is smaller, and it is right can to reduce to a certain extent material itself
In the influence of pass band insertion loss.In view of the cost problem of large-scale use, it is relatively small also to can choose material loss, is situated between
Other lower cost materials similar in electric constant.The cycle length of array also has a certain impact for the passband of structure, and the period is long
The more big then bandwidth of degree is smaller, this coupling being also due between adjacent cells reduces therewith.Equally, the thickness for increasing dielectric layer also can
Reduce stiffness of coupling to reduce the bandwidth of structure.
The size of zigzag gap 3a structure in metallic intermediate layer plate is identical.This layer is also the core of this structure design,
The length in gap can control the shape of structural transmission coefficient curve.Gap length crosses conference and causes the excessive influence of fluctuating in
The performance of structure, but can play the role of adjusting passband width in a certain range.Here the middle section in zigzag gap and interior
The size that section is chosen is identical, is length 1.5mm, width 0.5mm.The length in outer segment gap be 0.8mm, width 0.5mm,
It is less than the length in inner segment gap in length.The length and width in three sections of gaps of zigzag is that the optimum value after optimization (guarantees passband
Interior insertion loss is stable to be less than 0.1dB).If being further added by the length or width in this three sections of gaps, passband insertion will lead to
The fluctuation of loss causes the passband between transmission pole to occur being greater than the even more loss of 0.1dB, influences the performance of structure.
The gap length of square-loop slot element 3b is 5mm, width 0.3mm.Main function is for the transmission system for structure
Number curve increases a transmission zero, so that passband has the characteristics that precipitous to stopband, and has the advantage that stopband by it
Inhibition amplitude increases and the selectivity of frequency can increase.The width for increasing gap can change the stopband of transmission coefficient, so that >
20dB inhibits stopband to broaden to a certain extent.However, the minimum of stopband inhibits deep when gap width reaches 0.38mm
Degree will not be able to satisfy the inhibition of 20dB.The following table 2 specifically describes influence of the square-loop slot element width for stopband effect.
Influence of the 2 square-loop slot element width of table for stopband effect
Meanwhile the incident angle variation of electromagnetic wave influences also very greatly for the performance of antenna house.This structure considers
To meeting biggish passband as far as possible, stopband and stablize minimum insertion loss, the property within the scope of positive and negative 30 degree of angle change
It can be highly stable.Lower Fig. 5 illustrates influence of the electromagnetic wave incident angle for antenna house performance, it can be seen that encloses in the model frequency
Interior, the variation of angle is very small on the influence of the performance of antenna house, especially band-pass behavior, the only fluctuation of very little.
In the case that the integrally-built transfer curve of embodiment is as shown in fig. 6, consider electromagnetic wave normal incidence,
In the free transmission range of 26.1~28.9GHz, insertion loss is less than 0.1dB；In the case where considering dielectric material loss, 0.1dB
Pass band insertion loss be also to mention the smallest in the article delivered so far, and bandwidth is not accomplished in this structure nearly yet
The width of 2.7GHz.In the free transmission range of 25.7~29.2GHz, insertion loss is less than 0.3dB；Meanwhile the side of metal slit layer
Shape gap provides the stopband that Out-of-band rejection is larger and range is wider for antenna house.In the stopband range of 31.4~34.3GHz,
Stopband inhibits to be greater than 20dB.Support TE, two kinds of polarization modes of TM highly stable in positive and negative 30 degree of angle change performances simultaneously.
Therefore, there is important application value in the fields such as ultra wide band mobile communication and radar.
The present invention has prominent significant technical effect as a result, realizes nearly 2.7GHz band in the case of electromagnetic wave normal incidence
Wide pass-band loss, which is stablized, is less than 0.1dB, and the pass-band loss of 3.5GHz bandwidth, which is stablized, is less than 0.3dB, the stopband of 2.9GHz bandwidth
Inhibit to be greater than 20dB.TE, two kinds of polarization modes of TM, frequency highly stable in positive and negative 30 degree of angle change performances are supported simultaneously
Select excellent performance.
Claims (6)
1. a kind of based on antenna-filter-aerial array ultra wide band mobile communication antenna cover, it is characterised in that: the antenna
Cover is mainly selects surface by the periodic frequency that multiple same period cellular construction arrays form, and each periodic unit is by upper and lower
Metal slit layer composition between two layers of dielectric layer, bilevel circular ring metal patch layer and two layers of dielectric layer, space
Interior electromagnetic field is beaten to the antenna house, and successively three layer choosings Jing Guo upper metal layers, metal slit layer and lower metal layer are selected
Property filtering after, from lower metal layer export needed for frequency range electromagnetic field, and can significantly clutter reduction energy；
The periodic unit includes upper layer metal patch (1), top dielectric plate (2), metallic intermediate layer plate, layer dielectric plate
(4) it is located between top dielectric plate (2) and layer dielectric plate (4) with lower metal patch (5), metallic intermediate layer plate, upper layer gold
Belong to patch (1) and be affixed on top dielectric plate (2) upper surface, lower metal patch (5) is affixed on layer dielectric plate (4) lower surface, upper layer
Metal patch (1) is identical with lower metal patch (5) structure size；
The metallic intermediate layer plate is equipped with metallic intermediate layer gap (3), and metallic intermediate layer gap (3) include square-loop slot element
(3b) and four zigzag gaps (3a) for being located at the interior center square-loop slot element (3b), four zigzag gaps (3a) are with spiral center
Symmetric mode circumferentially uniformly at intervals, zigzag gap (3a) by metallic intermediate layer plate center be divided into outward inner segment gap, in
Wherein a line, middle section gap are flat each parallel to metallic intermediate layer plate for section gap and outer segment gap, inner segment gap and outer segment gap
For row in the another a line of metallic intermediate layer plate, the length in inner segment gap is greater than the length in outer segment gap.
2. it is according to claim 1 a kind of based on antenna-filter-aerial array ultra wide band mobile communication antenna cover,
It is characterized by: the center of symmetrical centre and square-loop slot element (3b) that four zigzag gaps (3a) are formed is respectively positioned on
The center of metallic intermediate layer plate.
3. it is according to claim 1 a kind of based on antenna-filter-aerial array ultra wide band mobile communication antenna cover,
It is characterized by: the upper layer metal patch (1) and lower metal patch (5) is the circular ring shape gold for being placed in dielectric-slab center
Belong to patch.
4. it is according to claim 1 a kind of based on antenna-filter-aerial array ultra wide band mobile communication antenna cover,
It is characterized by: the dielectric constant of the dielectric layer is 2.2, dielectric loss angle tangent 0.0009.
5. it is according to claim 1 a kind of based on antenna-filter-aerial array ultra wide band mobile communication antenna cover,
It is characterized by: the dielectric layer uses Rogers RT5880 plate, so that passing through the coupling between upper and lower circular ring metal layer
It closes in spatial electromagnetic wave in the case where normal incidence, the insertion loss in the free transmission range of 26.1~28.9GHz is less than
0.1dB。
6. any described a kind of based on antenna-filter-aerial array ultra wide band mobile communication according to claim 1~5
The application of antenna house, it is characterised in that in the application of 5G mobile communication.
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| EP3761449A1 (en) * | 2019-06-30 | 2021-01-06 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Housing assembly, antenna assembly, and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3761450A1 (en) * | 2019-06-30 | 2021-01-06 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Housing assembly and electronic devices |
| EP3761449A1 (en) * | 2019-06-30 | 2021-01-06 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Housing assembly, antenna assembly, and electronic device |
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| CN105914462A (en) | 2016-08-31 |
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