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EP4320683A1 - Agencement d'antenne pour appareil électronique - Google Patents

Agencement d'antenne pour appareil électronique

Info

Publication number
EP4320683A1
EP4320683A1 EP21729494.1A EP21729494A EP4320683A1 EP 4320683 A1 EP4320683 A1 EP 4320683A1 EP 21729494 A EP21729494 A EP 21729494A EP 4320683 A1 EP4320683 A1 EP 4320683A1
Authority
EP
European Patent Office
Prior art keywords
antenna
millimeter
wave frequency
antenna arrangement
reflector surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21729494.1A
Other languages
German (de)
English (en)
Inventor
Janne Ilvonen
Alexander Khripkov
Resti MONTOYA MORENO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of EP4320683A1 publication Critical patent/EP4320683A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • 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
    • 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
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H01Q15/22—Reflecting surfaces; Equivalent structures functioning also as polarisation filter

Definitions

  • the disclosure relates to an antenna arrangement for an electronic apparatus, the antenna arrangement comprising at least one radiation reflector surface and an antenna array comprising a plurality of antenna elements arranged along an antenna array axis and configured to generate millimeter-wave frequency radiation in directions perpendicular to the antenna array axis.
  • Mobile apparatuses such as smartphones require omni-coverage dual-polarized millimeter- wave antennas to achieve stable communication in all directions and orientations.
  • requirements on the apparatus design include providing a curved design including a sleek metal frame and a large display arranged with very small clearance since it is preferred to not have any visible openings.
  • Display side radiation is desired for millimeter- wave antennas.
  • antennas in the form of dipoles or monopoles are commonly used. These elements provide an omnidirectional pattern, however, they might cause energy leakage or radiation towards undesired directions such as directions away from the apparatus display side.
  • millimeter-wave antennas require reflectors, used to reflect and redirect radiation from undesired directions to desired directions. Such reflectors may, however, interfere with the performance of components of antennas outside of the millimeter-wave range, such as sub-6 GHz feeding posts.
  • a dielectric rod antenna is used for generating radiation towards the apparatus display side.
  • the dielectric rod antenna requires a lot of free space to be available inside the apparatus, and the solution is oftentimes incompatible with sub-6 GHz feeding posts. Furthermore, this solution requires multiple apparatus layers with different permittivity, i.e. dielectric constants, as well as a notch in the display.
  • an antenna arrangement for an electronic apparatus comprising an antenna array comprising a plurality of antenna elements arranged along an antenna array axis and configured to generate millimeter-wave frequency radiation in directions perpendicular to the antenna array axis, and at least one radiation reflector surface at least partially superimposed with the antenna array and extending parallel to the antenna array axis, the reflector surface being configured to reflect at least a part of the millimeter- wave frequency radiation towards at least one of the directions.
  • the reflector surface comprises at least one of a nonconductive reflector element comprising a material having a dielectric constant of at least 10, and a plurality of parallel elongated conductive reflectors, wherein each pair of the parallel elongated conductive reflectors are separated by an elongated gap, longitudinal axes of the parallel reflectors and longitudinal axes of the gaps extending perpendicular to the antenna array axis, the gaps being filled with a dielectric solid or air.
  • This solution allows millimeter- wave frequency radiation to be redirected using a reflector surface which can be arranged closer to the millimeter-wave antenna elements, allowing a larger distance to be maintained between the reflector surface and signal elements of other antennas, e.g. sub-6 GHz feeding posts, than in conventional solutions.
  • Such an antenna arrangement has a highly efficient radiation field with omni-coverage, while freeing up space within the apparatus for, e.g., the battery.
  • the antenna arrangement can be used together with highly curved display elements, since the reflector surface allows correct radiation steering regardless of the small distances involved.
  • Using a nonconductive reflector element removes the need for grounding, while using a plurality of parallel elongated conductive reflectors is easier to use in planar implementations.
  • the longitudinal axes extend within a main plane of the reflector surface, such than an as thin reflector surface as possible is provided.
  • At least one of the antenna elements is an end-fire antenna element configured to generate millimeter-wave frequency radiation having a main beam direction, a first polarization and a second polarization, the first polarization extending perpendicular to the main beam direction, the reflector surface being configured to reflect millimeter-wave frequency radiation having the first polarization.
  • the antenna arrangement comprises a plurality of reflector surfaces configured to reflect the millimeter-wave frequency radiation in different directions, providing maximum flexibility and adaptability to the arrangement.
  • the reflector surface is configured to be arranged at a distance ⁇ l/2 from the antenna element, l being a wavelength of the millimeter-wave frequency radiation.
  • the reflector surface is configured to be arranged at a distance between l/4 and l /10 from the antenna element.
  • the reflector surface is arranged within a near-field region of the antenna element, the near-field region being a region
  • a of the antenna element such that antenna performance is sufficient while still providing a very compact antenna arrangement.
  • the reflector surface forms an impedance discontinuity in the antenna arrangement, reflecting the radiation such that it adds constructively towards the desired direction of radiation.
  • the nonconductive reflector element comprises ceramic or plastic material, allowing the dielectric constant to be offset to robustness and manufacturability.
  • the nonconductive reflector element has a thickness, in a direction perpendicular to a main plane of the reflector element, which is ⁇ l/4, l being a wavelength of the millimeter-wave frequency radiation, allowing maximum radiation reflection while avoiding parasitic resonances.
  • the thickness is between l/8 and 3l /8, facilitating maximum reflectivity.
  • the nonconductive reflector element has a thickness, in a direction perpendicular to a main plane of the reflector element, which is an odd multiple of l/4, facilitating maximum reflectivity.
  • the thickness is ⁇ 1 mm, allowing an as thin antenna arrangement as possible.
  • the conductive reflectors and the gaps, separating the pairs of parallel reflectors are formed in one conductive sheet material, facilitating a simplified manufacturing process.
  • the reflector surface has a length, in a direction perpendicular to the antenna array axis, of between l and l/10, l being a wavelength of the millimeter-wave frequency radiation. This assures the end-fire radiation direction and helps avoid parasitic resonance.
  • the conductive reflectors and the gaps have lengths, along the longitudinal axes, within a length range of between l and l/10, l being a wavelength of the millimeter-wave frequency radiation. This assures the end-fire radiation direction and helps avoid parasitic resonance.
  • the gaps, separating the pairs of parallel reflectors allow millimeter-wave frequency radiation having the first polarization to propagate between adjacent pairs of parallel reflectors.
  • propagation of millimeter- wave frequency radiation having the second polarization is unaffected by the reflector surface.
  • an electronic apparatus comprising a display panel, a frame, a substrate enclosed at least by the display panel and the frame, and the antenna arrangement according to the above, wherein the antenna arrangement is configured to emit millimeter-wave frequency radiation having a first polarization propagating towards the display panel and to emit a second polarization propagating towards the frame, the antenna arrangement furthermore being configured to reflect at least part of the millimeter-wave frequency radiation having the first polarization.
  • the electronic apparatus further comprises at least one antenna configured to generate radiation outside of a millimeter- wave frequency range, the reflector surface of the antenna arrangement being configured to be arranged within a volume of the electronic apparatus comprising at least one signal feed probe of the antenna, the reflector surface being arranged at a distance from the signal feed probe(s), improving the compatibility of the antenna arrangement with non- millimeter-wave antennas and increasing design freedom.
  • the substrate comprises a flexible printed circuit, allowing existing components to be used as, e.g., a carrier for parts of the antenna arrangement, requiring fewer modifications to the frame of the apparatus and taking up less space within the apparatus.
  • the reflector surface is embedded in the display panel, frame, or substrate, facilitating assembly and freeing up additional space within the apparatus.
  • Fig. 1 shows a side view of an electronic apparatus in accordance with an example of the embodiments of the disclosure
  • Fig. 2 shows a partial top view of an electronic apparatus comprising an antenna arrangement in accordance with an example of the embodiments of the disclosure
  • Fig. 3 shows a cross-sectional view of an electronic apparatus comprising an antenna arrangement in accordance with an example of the embodiments of the disclosure
  • Fig. 4 shows a cross-sectional view of an electronic apparatus comprising an antenna arrangement in accordance with an example of the embodiments of the disclosure
  • Fig. 5 shows a cross-sectional view of an electronic apparatus comprising an antenna arrangement in accordance with an example of the embodiments of the disclosure
  • Fig. 6 shows a cross-sectional view of an electronic apparatus comprising an antenna arrangement in accordance with an example of the embodiments of the disclosure
  • Fig. 7 shows a partial perspective view of an electronic apparatus comprising an antenna arrangement in accordance with an example of the embodiments of the disclosure
  • Fig. 8 shows a cross-sectional view of an antenna arrangement in accordance with an example of the embodiments of the disclosure
  • Fig. 9 shows a partial perspective view of an antenna arrangement in accordance with an example of the embodiments of the disclosure.
  • Figs. 3 to 8 show an antenna arrangement 1 for an electronic apparatus 2 comprising an antenna array 3 comprising a plurality of antenna elements 4 arranged along an antenna array axis A1 and configured to generate millimeter- wave frequency radiation in directions perpendicular to the antenna array axis Al, and at least one radiation reflector surface 5 at least partially superimposed with the antenna array 3 and extending parallel to the antenna array axis Al, the reflector surface 5 being configured to reflect at least a part of the millimeter-wave frequency radiation towards at least one of the directions, the reflector surface 5 comprising at least one of a nonconductive reflector element 5a comprising a material having a dielectric constant of at least 10, see Figs.
  • each pair of the parallel elongated conductive reflectors 5b are separated by an elongated gap 6, longitudinal axes A2 of the parallel reflectors 5b and longitudinal axes A3 of the gaps 6 extending perpendicular to the antenna array axis Al, the gaps 6 being filled with a dielectric solid or air, see Figs. 8 and 9.
  • Figs. 1 and 2 show an electronic apparatus 2 comprising a display panel 7, a frame 8, a substrate 9 enclosed at least by the display panel 7 and the frame 8, and an antenna arrangement 1 described in more detail further below.
  • the frame 8 may comprise a conductive material.
  • the substrate 9 may comprise a flexible printed circuit such as a bent LCP board (Liquid Crystal Polymer), as illustrated in Figs. 8 and 9. Cutting away a very small portion of the plastic material, e.g. crastin, is sufficient in order to place the reflector surface at the optimal position from the antenna elements.
  • LCP board Liquid Crystal Polymer
  • the antenna arrangement 1 is configured to emit millimeter-wave frequency radiation having a first polarization propagating towards the display panel 7 and to emit a second polarization propagating towards the frame 8.
  • the antenna arrangement 1 is furthermore configured to reflect at least part of the millimeter- wave frequency radiation having the first polarization.
  • the electronic apparatus 2 may further comprise at least one antenna 10 configured to generate radiation outside of a millimeter- wave frequency range, such as radiation in the sub-6 GHz frequency range.
  • the reflector surface 5 of the antenna arrangement 1 is configured to be arranged within a volume of the electronic apparatus 2 comprising at least one signal feed probe 11 of the antenna 10.
  • the reflector surface 5 is arranged at a distance from the signal feed probes 11 such that the antenna arrangement 1 is not affected by the signal of the feed probes 11.
  • the reflector surface 5 may be embedded in the display panel 7, frame 8, or substrate 9, or may be a separate component applied onto a surface of the display panel 7, frame 8, or substrate 9.
  • the reflector surface 5 may be placed between the antenna elements 4 and other internal parts of the apparatus such that leakage of radiation to any other direction than the desired direction is prevented.
  • the reflector surface 5 may be placed, e.g., between the metals of the sub-6 GHz antennas and/or under the LCP board, the antenna elements 4 being located above the reflector surface 5.
  • the antenna arrangement 1 comprises an antenna array 3 and at least one radiation reflector surface 5.
  • the antenna arrangement 1 may comprise a plurality of reflector surfaces 5 configured to reflect the millimeter-wave frequency radiation in different directions. Each reflector surface 5 may form an impedance discontinuity in the antenna arrangement 1, hence causing reflection.
  • the antenna array 3 comprises a plurality of antenna elements 4 arranged along an antenna array axis Al, as shown in Fig. 2, each antenna element 4 comprising at least a radiator.
  • the antenna array 3 is configured to generate millimeter-wave frequency radiation in directions perpendicular to the antenna array axis Al.
  • At least one of the antenna elements 4 may be an end-fire antenna element 4.
  • An end-fire antenna array is a linear array in which the direction of radiation is along the line of the antennas, i.e. main beam direction DO as shown in the Figs.
  • the end-fire antenna elements 4 are configured to generate millimeter-wave frequency radiation having a main beam direction DO, a first polarization, and a second polarization.
  • the first polarization extends perpendicular to the main beam direction DO and the reflector surface 5 is configured to reflect millimeter-wave frequency radiation having the first polarization.
  • the first polarization may be vertical polarization and the second polarization may be horizontal polarization.
  • a so-called V-pol monopole may be used to generate vertically polarized radiation and a so-called H-pol dipole may be used to generate horizontally polarized radiation.
  • the reflector surface 5 is at least partially superimposed with the antenna array 3 and extends parallel to the antenna array axis Al.
  • the reflector surface 5 is configured to reflect at least a part of the millimeter-wave frequency radiation towards at least one of the directions perpendicular to the antenna array axis Al.
  • the reflector surface 5 may be configured to be arranged at a distance ⁇ l/2 from the antenna element 4, l being a wavelength of the millimeter-wave frequency radiation. More specifically, the reflector surface 5 may be configured to be arranged at a distance between l/4 and l /10 from the antenna element 4. The reflector surface 5 may be arranged within a near-field region of the antenna element 4, the near-field region being a region located at
  • the maximum outer dimension is the largest dimension of the antenna element, such as the length of a radiator having a rectangular surface area, or the diameter of a radiator having a circular surface area.
  • the reflector surface 5 may have a length, in a direction perpendicular to the antenna array axis Al, of between l and l/10, l being a wavelength of the millimeter-wave frequency radiation.
  • the reflector surface 5 comprises at least one of a nonconductive reflector element 5a and a plurality of parallel elongated conductive reflectors 5b.
  • the nonconductive reflector element 5a shown in Figs. 3 to 7, comprises a material having a so-called high dielectric constant, i.e., a dielectric constant of at least 10 such as 15, 20, or 40, enabling a broadband solution that works in a frequency range of 20-50 GHz.
  • the nonconductive reflector element 5a may comprise ceramic or high-permittivity plastic material.
  • High-permittivity plastic materials commonly have a dielectric constant up to 25 and are generally more flexible materials than ceramics, making them less fragile. Ceramic materials, on the other hand, are generally very rigid and thus, more fragile. Ceramics can have a dielectric constant from 15-20 up to values in the thousands.
  • Reflection and transmission of radiation occur due to the boundary discontinuity between two materials, resulting in a reflected wave in one of the materials and a transmitted wave in the other of the materials.
  • the thickness of the reflector element 5a is a multiple (i.e., positive integer) of the half-wavelength, A/2, the reflection at the boundary will be zero at a specific frequency. This means that the reflector element 5a appears transparent to the plane wave, which undesirable, and thus, in order to achieve maximum reflectivity, the thickness of the reflector element 5a must be 1 hl/2, where n is a positive integer.
  • the nonconductive reflector element 5a may, hence, have a thickness, in a direction perpendicular to a main plane of the reflector element 5a, which is ⁇ l/4, l being the wavelength of the millimeter- wave frequency radiation.
  • the thickness may be between l/8 and 3l/8.
  • the nonconductive reflector element 5a may also have a thickness, in the direction perpendicular to the main plane of the reflector element 5a, which is an odd multiple of l/4, such as 3l/8, in order to avoid the above-mentioned multiples of 7J2.
  • reflector bandwidth is limited by wave impedance, i.e., the effective dielectric constant, and parasitic resonances. Parasitic resonances occur above hl/2, limiting the highest frequency available. Therefore, the thickness of the reflector element 5a is preferably below 7J4 in order to reflect the radiation.
  • the thickness may be ⁇ 1 mm, e.g., 0.2 mm at a dielectric constant of 40.
  • the reflector element 5a may be too thin and might break easily or be difficult to manufacture. Since the permittivity used is lower when the dielectric constant is 20, the thickness of the reflector element 5a has to be increased to about 0.5 mm (l/8), which is preferable from a practical point of view.
  • materials other than ceramics, e.g., high-permittivity plastics can be used which may be more robust and easier to place inside the apparatus.
  • the directivity may be around 8dBi, covering the 24-29.5 and 37-43 GHz bands, if the distance between reflector element 5a and antenna element 4 is between l/10 and 7 5.
  • the plurality of parallel elongated conductive reflectors 5b are arranged such that each pair of parallel elongated conductive reflectors 5b are separated by an elongated gap 6.
  • the longitudinal axes A2 of the parallel reflectors 5b and the longitudinal axes A3 of the gaps 6 extend perpendicular to the antenna array axis Al, as shown in Fig. 9.
  • the longitudinal axes A2, A3 may extend within a main plane of the reflector surface 5.
  • the conductive reflectors 5b and the gaps 6, separating the pairs of parallel reflectors 5b may be formed in one conductive sheet material, as suggested in Fig. 9,
  • the conductive sheet material may be a copper sheet.
  • the conductive reflectors 5b/ conductive sheet material may be grounded to the frame 8 or the substrate 9.
  • the gaps 6 are filled with a dielectric solid or air.
  • Air has a dielectric constant of 1, while the dielectric solid may be any suitable material having a dielectric constant generally in the range of 2-5, generally 3.
  • the dielectric solid may be comprised by the main dielectric material of a conventional printed circuit board or liquid crystal polymer board, e.g. when the reflector surface 5, i.e. the reflectors 5b, are embedded into the board.
  • the conductive reflectors 5b and the gaps 6 may have lengths, along the longitudinal axes A2, A3, within a length range of between l and l/10, l being a wavelength of the millimeter-wave frequency radiation.
  • the gaps 6, separating the pairs of parallel reflectors 5b may allow millimeter-wave frequency radiation having the first polarization, e.g., vertical polarization to propagate between adjacent pairs of parallel reflectors 5b. Propagation of millimeter-wave frequency radiation having the second polarization, e.g., horizontal polarization, may remain unaffected by the reflector surface 5.
  • the terms “horizontal”, “vertical”, “left”, “right”, “up” and “down”, as well as adjectival and adverbial derivatives thereof simply refer to the orientation of the illustrated structure as the particular drawing figure faces the reader.
  • the terms “inwardly” and “outwardly” generally refer to the orientation of a surface relative to its axis of elongation, or axis of rotation, as appropriate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

L'invention concerne un agencement d'antenne (1) pour un appareil électronique (2) comprenant un réseau d'antennes (3) comprenant une pluralité d'éléments d'antenne (4) générant un rayonnement de fréquence à ondes millimétriques, et au moins une surface de réflecteur de rayonnement (5) au moins partiellement superposée au réseau d'antennes (3) et configurée pour réfléchir au moins une partie du rayonnement de fréquence d'onde millimétrique dans au moins une direction. La surface de réflecteur (5) comprend au moins l'un d'un élément réflecteur non conducteur (5a) comprenant un matériau ayant une constante diélectrique d'au moins 10, et une pluralité de réflecteurs conducteurs allongés parallèles (5b). Chaque paire de réflecteurs conducteurs allongés parallèles (5b) est séparée par un espace allongé (6) rempli d'un solide diélectrique ou d'air. La surface de réflecteur (s) (5) peut être incorporée dans un panneau d'affichage (7), un cadre (8), ou un substrat (9) de l'appareil électronique (2).
EP21729494.1A 2021-05-27 2021-05-27 Agencement d'antenne pour appareil électronique Pending EP4320683A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2021/064286 WO2022248052A1 (fr) 2021-05-27 2021-05-27 Agencement d'antenne pour appareil électronique

Publications (1)

Publication Number Publication Date
EP4320683A1 true EP4320683A1 (fr) 2024-02-14

Family

ID=76250341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21729494.1A Pending EP4320683A1 (fr) 2021-05-27 2021-05-27 Agencement d'antenne pour appareil électronique

Country Status (3)

Country Link
EP (1) EP4320683A1 (fr)
CN (1) CN117242643A (fr)
WO (1) WO2022248052A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6388620B1 (en) * 2000-06-13 2002-05-14 Hughes Electronics Corporation Slot-coupled patch reflect array element for enhanced gain-band width performance
WO2007136289A1 (fr) * 2006-05-23 2007-11-29 Intel Corporation Systèmes d'antennes à réseau de puces et de lentilles à ondes millimétriques pour réseaux sans fil
FR2914506B1 (fr) * 2007-03-29 2010-09-17 Centre Nat Rech Scient Antenne a resonateur equipe d'un revetement filtrant et systeme incorporant cette antenne.
CN114600315B (zh) * 2019-11-06 2024-10-11 华为技术有限公司 双极化天线模块及包括所述天线模块的电子设备
TWI738119B (zh) * 2019-11-19 2021-09-01 淡江大學 天線模組

Also Published As

Publication number Publication date
WO2022248052A1 (fr) 2022-12-01
CN117242643A (zh) 2023-12-15

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