CN109302851A - A kind of reflective array antenna and communication equipment - Google Patents
A kind of reflective array antenna and communication equipment Download PDFInfo
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- CN109302851A CN109302851A CN201680085993.4A CN201680085993A CN109302851A CN 109302851 A CN109302851 A CN 109302851A CN 201680085993 A CN201680085993 A CN 201680085993A CN 109302851 A CN109302851 A CN 109302851A
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- array
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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
- H01Q15/24—Polarising devices; Polarisation filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
- H01Q19/19—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
- H01Q19/195—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface wherein a reflecting surface acts also as a polarisation filter or a polarising device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/2658—Phased-array fed focussing structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/44—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element
- H01Q3/46—Active lenses or reflecting arrays
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- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
A kind of reflective array antenna and communication equipment, the antenna include feed array, subreflector and principal reflection array；Wherein, feed array can emit the electromagnetic wave of the first polarization direction；Subreflector is used to reflect the electromagnetic wave of the first polarization direction of feed array emitter, and can pass through the electromagnetic wave of the second polarization direction；Principal reflection array is used to the electromagnetic wave for the first polarization direction that subreflector reflects being converted into the electromagnetic wave of the second polarization direction, and reflects away.In the above-mentioned technical solutions, the electromagnetic wave of the first polarization direction can be reflected by using subreflector, and pass through the electromagnetic wave of the second polarization direction, so that the area that subreflector can be set is larger, and the electromagnetic radiation of principal reflection array will not be stopped, the beam scanning range that can be met the requirements in a manner of a kind of advantage of lower cost is realized, and can satisfy using the requirement for directional diagram.
Description
This application involves arrive field of communication technology more particularly to a kind of reflective array antenna and communication equipment.
Wave beam adjustable antenna receives significant attention in microwave communication, utilize the beam scanning capabilities of this antenna, on the one hand the time of microwave antenna installation alignment can be greatly reduced, link down problem caused by wave beam tracking ability may be implemented on the other hand to cause equipment to be rocked anti-strong wind etc..
In the prior art using a small amount of antenna element as paraboloid or the feed of lens, the scanning of final wave beam is realized using the scan capability of feed, and has both high-gain.But since feed scanning needs to cover subreflector in the program, and subreflector is usually smaller in order to avoid block main beam, therefore scanning angle is limited.
Summary of the invention
The embodiment of the present application provides a kind of reflective array antenna, and it is limited to solve the problems, such as that subreflector blocks scanning angle caused by principal reflection array.
The antenna includes feed array, and the subreflector of feed array side is arranged in, and the principal reflection array of the feed array other side opposite with the subreflector is arranged in；Wherein,
The feed array can emit the electromagnetic wave of the first polarization direction；
The subreflector is used to reflect the electromagnetic wave of the first polarization direction of the feed array emitter, and can pass through the electromagnetic wave of the second polarization direction, and first polarization direction and the second polarization direction are mutually perpendicular to；
The principal reflection array is used to the electromagnetic wave for the first polarization direction that the subreflector reflects being converted into the electromagnetic wave of the second polarization direction, and reflects away.
In the above-mentioned technical solutions, the electromagnetic wave of the first polarization direction can be reflected by using subreflector, and passes through the electromagnetic wave of the second polarization direction, so that the area that subreflector can be set is larger, and
The electromagnetic radiation that will not stop principal reflection array realizes the beam scanning range that can be met the requirements in a manner of a kind of advantage of lower cost, and can satisfy using the requirement for directional diagram.
In a specific embodiment, the feed array includes multiple feed antenna units, and the adjusting unit connecting with each feed antenna unit.
Wherein, the adjusting unit includes the phase shifting equipment being connect with each feed antenna unit for adjusting phase, and, optionally, the gain adjustment device for the amplitude of accommodation is connect with each feed antenna unit.By adjusting the phase shifting equipment and/or gain adjustment device that connect in array feed with each feed antenna unit, the beam position of adjustable array feed.
In specific setting, the principal reflection array includes the reflector element of multiple array arrangements.Each reflector element therein includes substrate, and the reflection patch of setting over the substrate.Incident polarization of electromagnetic wave direction can be rotated by 90 ° by the reflection patch.It can change polarization of electromagnetic wave direction by the reflection patch of setting, electromagnetic wave blazed abroad by subreflector, avoids the blocking of subreflector.
In specific setting, subreflector can use different set-up modes.Description in detail below.
In a specific embodiment, the subreflector includes substrate, and the single polarization gap array of setting on the substrate, and each gap allows the electromagnetic wave of the second polarization direction to penetrate.The single polarization gap arranges in a manner of array, reflects in the reflection of electromagnetic wave to principal reflection array for the first polarization direction that feed can be launched.
At specifically setting gap, along from the subreflector center to the orientation at edge, the phase delay in the gap is gradually decreased.
In addition, the subreflector is plate structure when using aforesaid way.Meanwhile principal reflection array also uses plate structure.Certain subreflector can also be the different shape such as rectangle, circle, ellipse.
In another embodiment, the subreflector is the polarization grid with arcuate structure, wherein, the polarization direction of the polarization grid is vertical with the polarization direction of the signal of feed array emitter, and the polarization one side indent of the grid towards the feed array.
The embodiment of the present application also provides a kind of communication equipment, which includes reflective array antenna described in any of the above embodiments.
In the above-mentioned technical solutions, the electromagnetic wave of the first polarization direction can be reflected by using subreflector, and pass through the electromagnetic wave of the second polarization direction, so that the area that subreflector can be set is larger, and the electromagnetic radiation of principal reflection array will not be stopped, the beam scanning range that can be met the requirements in a manner of a kind of advantage of lower cost is realized, and can satisfy using the requirement for directional diagram.
Fig. 1 is the structural schematic diagram for the reflective array antenna that one embodiment of the application provides；
Fig. 2 is the structural schematic diagram of subreflector provided by the embodiments of the present application；
Fig. 3 is the structural schematic diagram of principal reflection array provided by the embodiments of the present application；
Fig. 4 is principal reflection array provided by the embodiments of the present application change polarization of ele direction with reference to figure；
Fig. 5 is the structural schematic diagram for the reflective array antenna that another embodiment of the application provides；
Fig. 6 is the structural schematic diagram of subreflector provided by the embodiments of the present application.
The application is described below in conjunction with attached drawing.
As shown in Figures 1 and 5, Fig. 1 and Fig. 5 shows the reflective array antenna that two kinds of different embodiments provide, comprising with flowering structure in the reflective array antenna that two kinds of specific embodiments provide: feed array 10, subreflector 30 and principal reflection array 20；In specific setting,
The side of feed array 10 is arranged in subreflector 30, and the other side opposite with subreflector 30 of feed array 10 is arranged in principal reflection array 20, wherein
Feed array 10 can emit the electromagnetic wave of the first polarization direction；
Subreflector 30 is used to reflect the electromagnetic wave of the first polarization direction of the transmitting of feed array 10, and can pass through the electromagnetic wave of the second polarization direction, and the first polarization direction and the second polarization direction are mutually perpendicular to；
Principal reflection array 20 is used to the electromagnetic wave for the first polarization direction that subreflector 30 reflects being converted into the electromagnetic wave of the second polarization direction, and reflects away.
Feed array 10 therein includes the feed antenna unit 11 of array arrangement, and the adjusting unit connecting with each feed antenna unit 11.Each feed antenna unit 11 can be an independent antenna element 11, be also possible to a sub- array antenna, and the electromagnetic wave of the first polarization direction can be launched by the feed antenna unit 11.The feed antenna unit 11 includes the phase shifting equipment being connect with each feed antenna unit 11 for adjusting phase with adjusting unit, and, optionally, the gain adjustment device for the amplitude of accommodation is connect with each feed antenna unit 11.By adjusting the phase shifting equipment and/or gain adjustment device that connect in array feed with each feed antenna unit, the beam position of adjustable array feed.
After the electromagnetic wave that feed array 10 launches the first polarization direction, on Electromagnetic Wave Propagation to subreflector 30, since subreflector 30 has the electromagnetic wave of the first polarization direction of reflection, the function of allowing the electromagnetic wave of the second polarization direction to pass through, therefore, the electromagnetic wave that feed array 10 is emitted on subreflector 30 is reflected on principal reflection array 20 secondary reflection again, and in reflection, the principal reflection array 20 can change polarization of electromagnetic wave direction, so that the electromagnetic wave of the secondary reflection again of principal reflection array 20 becomes the electromagnetic wave of the second polarization direction, and the electromagnetic wave of the second polarization direction can pass through subreflector 30.Therefore, in subreflector 30 in setting, the biggish structure of area can be set into, so as to guarantee in reflection of electromagnetic wave to principal reflection array 20 that subreflector 30 can launch feed array 10, and the subreflector 30 being arranged will not stop the electromagnetic radiation of principal reflection array 20, the beam scanning range that can be met the requirements in a manner of a kind of advantage of lower cost is realized, and can satisfy using the requirement for directional diagram.
If Fig. 3 and Fig. 4, Fig. 3 show the structure of a reflector element of principal reflection array 20 provided in this embodiment, Fig. 4 shows reflector element to the schematic diagram of reflection of electromagnetic wave.Fig. 1 is referred to together, and principal reflection array 20 provided in this embodiment includes the reflector element of multiple arrays arrangement.When specific setting, as shown in Figure 1, the mode of multiple reflector element rectangular arrays arranges；When reflector element includes substrate 21 and reflection patch 22 as shown in Figure 3, reflection patch 22 is arranged on substrate 21, and when reflector element is arranged in array manner, the substrate 21 of multiple reflector elements is structure as a whole.I.e. entire principal reflection array 20 includes the substrate 21 of a monolith, and is fixed on the substrate 21 and in the reflection patch 22 of array arrangement.In said structure, the function of principal reflection array 20 is mainly to be realized by reflection patch 22, i.e., changes polarization of electromagnetic wave direction by reflection patch 22, which is will be incident
The reflection patch 22 that polarization of electromagnetic wave direction is rotated by 90 °.Specifically, as shown in Figure 4, the polarization of ele direction that feed array emitter comes out differs 45 degree with the polarization direction of reflection patch 22, pass through the size of design reflection patch 22, so that electromagnetic wave on reflecting patch 22 when being reflected, the delay and the delay of component perpendicular to the polarization direction for reflecting patch 22 for being parallel to the component of the polarization direction of reflection patch 22 differ 180 degree, so that polarization of electromagnetic wave direction is by the first polarization direction when electromagnetic wave irradiation is to principal reflection array 20It is transformed into the second polarization directionThe polarization direction of incident electromagnetic wave is rotated by 90 °.So that the signal after reflection can be through secondary reflective array.
In specific setting, subreflector 30 can use different set-up modes.Description in detail below.
Embodiment 1
As shown in Figures 1 and 2, wherein Fig. 1 shows the structure of reflective array antenna, and Fig. 2 shows the structural schematic diagrams of subreflector 30.As seen from Figure 1, in reflective array antenna provided in this embodiment, the central point of subreflector 30, principal reflection array 20 and feed array 10 is located along the same line, and is arranged in parallel between three.
As shown in Figure 2, in the present embodiment, subreflector 30 is a plate structure 31, specifically, such as rectangle, it is round, the different shape such as ellipse, array is provided with multiple single polarization gaps 312 on the plate structure 31, its polarization direction is vertical with the polarization of ele direction that feed array 10 emits, specifically, the subreflector 30 includes a substrate 311, the substrate 311 is rectangular shape, and array is arranged multiple single polarization gaps 312 on the substrate 311, using the placement direction of antenna shown in FIG. 1 as reference direction, in the present embodiment, the length direction in gap 312 is vertical direction, each gap 312 allows the electromagnetic wave of the second polarization direction to penetrate.I.e. the polarization direction in gap 312 is vertical with the polarization direction of signal (electromagnetic wave that feed array 10 issues), therefore the signal that feed emits is reflected (but signal identical with 312 polarization direction of gap can then penetrate the pair reflective array) on the pair reflective array；The array is a nonuniform noise, it is realized on each unit to the different delays of signal by designing different 312 shapes of gap to control phase, so that the reflection signal in feed wave beam (feed array 10) scanning process can be fallen within the scope of principal reflection battle array always, it can the electricity for the first polarization direction for launching feed
Magnetic wave, which is reflected on principal reflection array 20, to be reflected.
Specifically, different 312 shapes of gap is designed to realize on each unit to there are many kinds of the methods of the different delays of signal, using the width in gap, shape etc., here without limitation.Under the modes of emplacement of the present embodiment, along from the subreflector center to the orientation at edge, the phase delay in the gap is gradually decreased.By different seam shapes, so that the phase delay close to the gap of subreflector center is larger, and the phase delay close to the gap of marginal position is smaller, and the phase delay for arriving the gap of marginal position from the central position is successively decreased.The purpose designed in this way is to compensate the propagation difference between subreflector cell position and primary reflection surface by phase-delay difference, so that the signal after the gap on subreflector is reflected can just be fallen within the scope of principal reflection battle array after space combination, energy will not be wasted.
Embodiment 2
As shown in Figures 5 and 6, Fig. 5 is the reflective array antenna that another embodiment of the application provides, and Fig. 6 shows the structural schematic diagram of subreflector 30 provided in this embodiment.
As shown in Figure 5, feed array 10 provided in this embodiment, principal reflection array 20, subreflector 30 central point be located on the same line, and it is arranged in parallel between three, in the present embodiment, since subreflector 30 is arcuate structure, therefore, the subreflector 30 is parallel with principal reflection array 20 refers to, the plane where subreflector 30 towards the edge of the one side of principal reflection array 20 is parallel with principal reflection array 20.
Fig. 5 and Fig. 6 is referred to together, it can be seen that by Fig. 5 and Fig. 6, subreflector 30 provided in this embodiment is polarization grid 321, using the placement direction of antenna shown in fig. 5 as reference direction, the length direction of polarization grid 321 is vertical direction, and the polarization direction for the grid 321 that polarizes is vertical with the polarization direction of signal that feed array 10 emits.Therefore the signal that feed emits is reflected (but signal identical with 312 polarization direction of gap can then penetrate the pair reflective array) on the pair reflective array；The subreflector 30 is the arc panel 32 of an indent, and arc panel 32 is towards the one side indent of feed array 10.In a specific embodiment, subreflector 30 is a parabolic shape, the purpose designed in this way is to compensate the propagation difference between each reflection point position of subreflector and primary reflection surface by globoidal structure, so that the signal after the gap on subreflector is reflected can just be fallen within the scope of principal reflection battle array after space combination, so that feed wave beam (electromagnetic wave that feed array 10 emits) passes through the polarization grid
After 321 reflections, signal can cover principal reflection array 20.
The embodiment of the present application also provides a kind of communication equipment, which includes the reflective array antenna of any of the above-described.
In the above-described embodiments, using feed array 10, principal reflection array 20, the antenna that subreflector 30 forms, and after the electromagnetic wave that feed array 10 launches the first polarization direction, on Electromagnetic Wave Propagation to subreflector 30, since subreflector 30 has the electromagnetic wave of the first polarization direction of reflection, the function of allowing the electromagnetic wave of the second polarization direction to pass through, therefore, the electromagnetic wave that feed array 10 is emitted on subreflector 30 is reflected on principal reflection array 20 secondary reflection again, and in reflection, the principal reflection array 20 can change polarization of electromagnetic wave direction, so that the electromagnetic wave of the secondary reflection again of principal reflection array 20 becomes the electromagnetic wave of the second polarization direction, and the electromagnetic wave of the second polarization direction can pass through subreflector 30.Therefore, in subreflector 30 in setting, the biggish structure of area can be set into, so as to guarantee in reflection of electromagnetic wave to principal reflection array 20 that subreflector 30 can launch feed array 10, and the subreflector 30 being arranged will not stop the electromagnetic radiation of principal reflection array 20, the beam scanning range that can be met the requirements in a manner of a kind of advantage of lower cost is realized, and can satisfy using the requirement for directional diagram.
Although a kind of embodiment of the application has been described, once a person skilled in the art knows basic creative concepts, then additional changes and modifications can be made to these embodiments.So it includes embodiment described herein and all change and modification for falling into the application range that the following claims are intended to be interpreted as.
Obviously, those skilled in the art can carry out various modification and variations without departing from the spirit and scope of the embodiment of the present application to the embodiment of the present application.If then the application is also intended to include these modifications and variations in this way, these modifications and variations of the embodiment of the present application belong within the scope of the claim of this application and its equivalent technologies.
Claims (10)
- A kind of reflective array antenna, which is characterized in that including feed array, the subreflector of feed array side is set, and the principal reflection array of the feed array other side opposite with the subreflector is set；Wherein,The feed array is used to emit the electromagnetic wave of the first polarization direction；The subreflector is used to reflect the electromagnetic wave of the first polarization direction of the feed array emitter, and can pass through the electromagnetic wave of the second polarization direction, and first polarization direction and the second polarization direction are mutually perpendicular to；The principal reflection array is used to the electromagnetic wave for the first polarization direction that the subreflector reflects being converted into the electromagnetic wave of the second polarization direction, and reflects away.
- Reflective array antenna as described in claim 1, which is characterized in that the feed array includes the feed antenna unit of array arrangement, and the adjusting unit connecting with each feed antenna unit.
- Reflective array antenna as claimed in claim 2, which is characterized in that the adjusting unit includes the phase shifting equipment connecting with each feed antenna unit, and the gain adjustment device connecting with each feed antenna unit.
- Reflective array antenna as claimed in claim 3, which is characterized in that the principal reflection array includes the reflector element of multiple array arrangements.
- Reflective array antenna as claimed in claim 4, which is characterized in that each reflector element includes substrate, and the reflection patch of setting over the substrate, and the reflection patch is used to for being rotated by 90 ° in incident polarization of electromagnetic wave direction.
- Reflective array antenna as claimed in any one of claims 1 to 5, which is characterized in that the subreflector includes substrate, and the single polarization gap array of setting on the substrate, and each gap allows the electromagnetic wave of the second polarization direction to penetrate.
- Reflective array antenna as claimed in claim 6, which is characterized in that the subreflector is the plate structure of rectangle.
- Reflectarray antenna as claimed in claim 6, which is characterized in that along from the subreflector To the orientation at edge, the phase delay in the gap gradually decreased at center.
- Reflective array antenna as claimed in any one of claims 1 to 5, it is characterized in that, the subreflector is the polarization grid with arcuate structure, wherein, the polarization direction of the polarization grid is vertical with the polarization direction of the signal of feed array emitter, and the polarization one side indent of the grid towards the feed array.
- A kind of communication equipment, which is characterized in that including reflective array antenna as described in any one of claims 1 to 9.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2016/108052 WO2018098698A1 (en) | 2016-11-30 | 2016-11-30 | Reflective array antenna and communication device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109302851A true CN109302851A (en) | 2019-02-01 |
| CN109302851B CN109302851B (en) | 2020-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680085993.4A Active CN109302851B (en) | 2016-11-30 | 2016-11-30 | Reflective array antenna and communication equipment |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3531508B1 (en) |
| JP (1) | JP6778820B2 (en) |
| CN (1) | CN109302851B (en) |
| WO (1) | WO2018098698A1 (en) |
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| CN111211404A (en) * | 2020-03-23 | 2020-05-29 | 成都华芯天微科技有限公司 | Low-profile scannable planar reflective array antenna system with rotating subreflector and scanning method |
| CN113745848A (en) * | 2020-05-29 | 2021-12-03 | 华为技术有限公司 | Antenna, use method and communication base station |
| CN114649686A (en) * | 2022-05-16 | 2022-06-21 | 电子科技大学 | High-gain folding type planar reflective array antenna with filtering characteristic |
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| US11605898B2 (en) | 2018-08-08 | 2023-03-14 | Nokia Shanghai Bell Co., Ltd. | Antenna |
| WO2021150384A1 (en) * | 2020-01-08 | 2021-07-29 | Metawave Corporation | Reflectarray antenna with two-dimensional beam scanning |
| CN113922103A (en) * | 2020-07-10 | 2022-01-11 | 华为技术有限公司 | Antenna system and beam forming method |
| CN112201964B (en) * | 2020-09-30 | 2024-01-16 | 中国科学院空天信息创新研究院 | Reflection transmission array antenna and construction method thereof |
| CN113113770B (en) * | 2021-04-30 | 2024-03-19 | 广州智讯通信系统有限公司 | Antenna adopting polarization sensitive molded line-circular polarization converter |
| CN115036683B (en) * | 2022-05-25 | 2024-02-02 | 西安电子科技大学 | Reflection array antenna based on solar panel unit |
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| CN111211404A (en) * | 2020-03-23 | 2020-05-29 | 成都华芯天微科技有限公司 | Low-profile scannable planar reflective array antenna system with rotating subreflector and scanning method |
| CN115051143A (en) * | 2020-03-23 | 2022-09-13 | 成都华芯天微科技有限公司 | Design method of high-gain planar transmitting array antenna system |
| CN115051143B (en) * | 2020-03-23 | 2023-03-28 | 成都华芯天微科技有限公司 | Scanning method based on high-gain planar transmitting array antenna system |
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| CN113745848A (en) * | 2020-05-29 | 2021-12-03 | 华为技术有限公司 | Antenna, use method and communication base station |
| CN113745848B (en) * | 2020-05-29 | 2024-03-01 | 华为技术有限公司 | Antenna, using method and communication base station |
| CN114649686A (en) * | 2022-05-16 | 2022-06-21 | 电子科技大学 | High-gain folding type planar reflective array antenna with filtering characteristic |
| CN114649686B (en) * | 2022-05-16 | 2022-08-02 | 电子科技大学 | High-gain folding type planar reflective array antenna with filtering characteristic |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109302851B (en) | 2020-12-04 |
| EP3531508B1 (en) | 2022-01-05 |
| EP3531508A1 (en) | 2019-08-28 |
| JP2019536384A (en) | 2019-12-12 |
| JP6778820B2 (en) | 2020-11-04 |
| EP3531508A4 (en) | 2019-10-23 |
| WO2018098698A1 (en) | 2018-06-07 |
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