CN110444855B - Dual-polarized 5G antenna integrated on metal frame of mobile terminal - Google Patents

Dual-polarized 5G antenna integrated on metal frame of mobile terminal Download PDF

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Publication number
CN110444855B
CN110444855B CN201810410977.9A CN201810410977A CN110444855B CN 110444855 B CN110444855 B CN 110444855B CN 201810410977 A CN201810410977 A CN 201810410977A CN 110444855 B CN110444855 B CN 110444855B
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CN
China
Prior art keywords
antenna
circuit board
metal frame
mobile terminal
polarized
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Application number
CN201810410977.9A
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Chinese (zh)
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CN110444855A (en
Inventor
吴西彤
俞斌
郭哲庭
罗布·希尔
李刚
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.)
Shuo Beide Wireless Technology Co Ltd
Huizhou Speed Wireless Technology Co ltd
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Shuo Beide Wireless Technology Co Ltd
Huizhou Speed Wireless Technology Co ltd
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Priority to CN201810410977.9A priority Critical patent/CN110444855B/en
Publication of CN110444855A publication Critical patent/CN110444855A/en
Application granted granted Critical
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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/22Supports; Mounting means by structural association with other equipment or articles
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/36Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/50Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/52Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/24Polarising devices; Polarisation filters 
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10Combinations 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

Abstract

The invention relates to the technical field of antennas, and particularly discloses a dual-polarized 5G antenna integrated on a metal frame of a mobile terminal, which comprises an equipment shell, a multilayer circuit board and at least one antenna unit, wherein the equipment shell comprises a back cover and the metal frame, the antenna unit comprises a reflection cavity integrated on the metal frame, an antenna feed part printed on the multilayer circuit board and an antenna radiation patch positioned in the reflection cavity, and the multilayer circuit board is at least two layers.

Description

Dual-polarized 5G antenna integrated on metal frame of mobile terminal
Technical Field
The invention relates to the technical field of antennas, in particular to a dual-polarized 5G antenna integrated on a metal frame of a mobile terminal.
Background
The 5G (5 th-Generation, fifth Generation mobile communication technology) is oriented to the human information society in the 2020, and although related technologies are not completely established, a 5G communication technology with high speed, low time delay, mass device connection, and low power consumption is expected to occupy an important position in the future society. The 5G terminal antenna as a core component of the 5G terminal device will play a positive and important role in promoting and promoting the development of new generation mobile communication systems and 5G mobile phones and other mobile terminals.
Different from the omnidirectional radiation antenna of a 4G mobile phone, the 5G mobile phone needs an antenna array for realizing beam forming on a millimeter wave frequency band, but the antenna array on the mobile phone is different from that of a base station, and at the base station end, because the antenna size is less limited and relatively mature phased array antenna technology is adopted for supporting, the prototype of the 5G base station antenna is shown. However, at the mobile terminal, due to the antenna space limitation of the mobile terminal such as a mobile phone and the environmental complexity such as metal, it is not a small challenge to make the 5G antenna compatible with the existing 2G/3G/4G/GPS/WiFi/BT antenna.
Due to the increasing consumption of frequency spectrum resources and the increasing degree of communication density, the single-polarized antenna can not meet the requirements of modern communication on interference resistance, frequency spectrum utilization rate and the like. Therefore, in practical application, the dual-polarized antenna more meets the practical requirements of people.
Disclosure of Invention
In view of the above technical problems, the present invention provides a dual-polarized 5G antenna which realizes a dual-polarized beam with an end-fire characteristic on a mobile terminal, has a simple feed structure, is easy to integrate on a circuit board, and is integrated on a metal frame of the mobile terminal.
In order to solve the technical problems, the invention provides the following specific scheme: the utility model provides an integrated dual polarization 5G antenna on mobile terminal metal frame, includes equipment shell, multilayer circuit board and at least one antenna element, equipment shell includes back of the body lid and metal frame, antenna element is including integrated reflection chamber on the metal frame, the antenna feed part of printing on multilayer circuit board to and be located the antenna radiation paster of reflection intracavity, multilayer circuit board is at least two-layer.
The dual-polarized 5G antenna is integrated on the metal frame of the mobile terminal, the dual-polarized 5G antenna is compatible with the existing 2G/3G/4G/GPS/WiFi/BT antenna, and the reflection cavity is arranged, so that a good antenna environment is provided for the dual-polarized 5G antenna, the directional radiation characteristic of the dual-polarized 5G antenna is better, and the dual-polarized 5G antenna is isolated from the existing 2G/3G/4G/GPS/WiFi/BT antenna and other components.
Preferably, the horizontally polarized feed part of the antenna feed part is a rectangular copper-clad layer formed by etching a T-shaped slot in an L-shaped feed line coupling manner, the rectangular copper-clad layer is connected with the ground of the multilayer circuit board, and magnetic current along the horizontal direction is formed by coupling the T-shaped slot through the feed line, so that current on the antenna radiation patch in the horizontal direction is excited, and horizontally polarized radiation is formed.
Preferably, the vertically polarized feed part of the antenna feed part is composed of a metal through hole parallel to the thickness direction of the multilayer circuit board and a feed line perpendicular to the thickness direction of the multilayer circuit board, the feed line transmits energy to the metal through hole, and the metal through hole couples the energy to the antenna radiation patch in an electric coupling manner, so that the current in the vertical direction on the antenna radiation patch is excited to form vertically polarized radiation; the metal through holes can be metalized through holes, metalized blind holes or metalized buried holes, and the type of the metal through holes is selected according to the thickness of the plate.
Preferably, the reflective cavity is a cavity formed by inward recessing of the metal frame, the reflective cavity is filled with a low-loss material, the low-loss material refers to a material with a dielectric constant greater than 1 and a dielectric loss less than 0.02, such as plastic, the filling may be partially filled or different materials may be selected for filling, the filling mode may be nano injection molding, the specific filling mode and content should be selected according to the beam scanning range, the plastic filling may reduce the distance between the units, and the scanning angle may be increased.
Preferably, the antenna radiation patch is located on the surface of the low-loss material, the antenna radiation patch may be etched on the surface of the low-loss material by LDS laser etching, or may be attached to the surface of the low-loss material by using other processes, and the shape of the radiation patch may be square, or rectangular, circular, or other symmetrical polygons along the horizontal direction and the vertical direction.
Preferably, the inner wall of the reflective cavity is provided with an opening, the multilayer circuit board is located in the opening, and the opening is determined according to the thickness of the multilayer circuit board and the position of the feed signal line on the multilayer circuit board, which can be specifically divided into three cases, namely: when the feed signal lines are all arranged inside the multilayer circuit board, the inner wall of the reflecting cavity only needs to be provided with an opening with the same height and thickness as the multilayer circuit board and the same length as the multilayer circuit board; case two: when one polarized feed signal line is on the surface of the circuit board and the other polarized feed signal line is in the circuit board, two rows of openings are needed on the inner wall of the reflection cavity, wherein one row of openings is the same as the first row of openings, the other row of openings are arranged for preventing the feed signal line on the surface of the multilayer circuit board from being short-circuited with the inner wall of the reflection cavity, and the number of the row of openings is equal to the number of the feed signal lines on the surface of the multilayer circuit board; case three: when one polarized feed signal line is positioned on one surface of the multilayer circuit board, and another polarized feed signal line is positioned on another surface of the multilayer circuit board, three rows of openings are required on the inner wall of the reflecting cavity, wherein the height of the longer opening positioned in the middle is consistent with the height of the multilayer circuit board, the length is consistent with the length of the multilayer circuit board, the number of the openings positioned on the upper side of the middle opening is equal to the number of the openings positioned on the lower side of the middle opening, the arrangement reasons of the openings are the same as those in the second case, and the shape of the opening arranged for preventing the feed signal line from being short-circuited with the inner wall of the reflecting cavity can be square, or rectangular, semicircular or other polygonal along the vertical direction.
Preferably, the metal frames include a top metal frame located at the top of the mobile terminal and a side metal frame located at the side of the mobile terminal, and the distribution positions of the dual-polarized 5G antennas and the number of antenna units can be set according to specific application scene requirements.
Preferably, the dual-polarized 5G antenna is located on the top metal frame, or on the side metal frame, or on both the top metal frame and the side metal frame.
Compared with the prior art, the invention has the beneficial effects that: the dual-polarized 5G antenna integrated on the metal frame of the mobile terminal provided by the invention realizes the good compatibility of the 5G antenna on the terminal equipment and the existing 2G/3G/4G/GPS/WiFi/BT antenna, realizes dual polarization through a simple feeding mode which is easy to integrate in a multilayer circuit board, and meets the requirement of 5G millimeter wave communication.
Drawings
FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;
FIG. 2 is a side view of an embodiment of the present invention;
FIG. 3 is a schematic diagram of the low loss material of FIG. 2 being transparent and the antenna being partially enlarged;
FIG. 4 is a schematic view of the antenna radiation patch of FIG. 3 after being made transparent;
fig. 5 is a schematic structural diagram of an embodiment in which the antenna radiation patch, the low-loss material, and the structure of the multilayer circuit board except the feeding structure are all made transparent;
FIG. 6 is a schematic diagram illustrating an internal structure of a multi-layer circuit board in an embodiment after three layers of boards from top to bottom are transparent;
fig. 7 is a schematic view of a transparent, partially enlarged antenna radiation patch in another embodiment of a low loss material;
fig. 8 is a schematic structural diagram of another embodiment in which the antenna radiation patch, the low-loss material, and the structure of the multilayer circuit board except the feeding structure are all transparent;
FIG. 9 is a schematic diagram illustrating an internal structure of a multilayer circuit board according to another embodiment after four transparent sheets are disposed from top to bottom;
wherein 101 is a side metal frame; 102 is a top metal frame; 2 is a multilayer circuit board; 201 is a first layer circuit board; 202 is a second layer circuit board; 203 is a third layer circuit board; 204 is a fourth layer circuit board; 2011 is an L-shaped feeder line; 2012 is an upper copper-clad layer of the first circuit board; 2013 is a metal through hole in the first layer of circuit board; 2014 is a copper-attached layer between the first layer circuit board and the second layer circuit board; 2015 is a rectangular copper-attached layer etched with a T-shaped groove; 2021 is a metal via in the second layer of circuit board; 2031 is a feed line of a vertically polarized feed part; 2032 is a metal via of a vertically polarized power feeding portion; 2033 is a copper layer between the second and third circuit boards; 2034 is a metal via in the third layer of circuit board; 2035 is a lower copper-clad layer of the third circuit board; 2036 is a copper layer between the third and fourth circuit boards; 2037 is a lower copper-clad layer of the fourth circuit board; 2038 is a metal via in the fourth layer of circuit board; 3 is a reflection cavity; 301 is an opening; 4 is a low-loss material; and 5 is an antenna radiation patch.
Detailed Description
In order to explain the technical solution of the present invention in detail, the technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiment of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
The first embodiment is as follows:
referring to fig. 1, the present invention provides a dual-polarized 5G antenna integrated on a metal frame of a mobile terminal, where only some components of the mobile terminal are shown, including a device back cover, the metal frame, a multi-layer circuit board, and an antenna unit. The back cover of the device can be made of metal, glass, plastic or ceramic, as shown in fig. 1, dual-polarized 5G antenna arrays can be distributed on the side metal frame and the top metal frame of the mobile terminal, certainly, dual-polarized 5G antenna arrays can be distributed only on the side metal frame or the top metal frame, and the number of antenna units in the array can be selected according to actual needs.
Example two:
fig. 2-4 are schematic diagrams of an antenna structure with a side metal frame, wherein, as shown in fig. 2, the side of the mobile terminal is an overall schematic diagram, a reflective cavity is integrated on the side metal frame, a low-loss material is filled in the reflective cavity, and an antenna radiation patch is disposed on a surface of the low-loss material, where the antenna radiation patch is a square, and the shape of the antenna radiation patch may be a rectangle, a circle, or other polygons symmetrical along the horizontal direction and the vertical direction. As shown in fig. 3, the side metal bezel includes a schematic diagram of an antenna portion when viewed from the side of the mobile terminal, in order to further illustrate the structure of the antenna, wherein the low-loss material filled in the reflective cavity is set to be transparent, at the outermost side of the reflective cavity, an antenna radiation patch, and behind the antenna radiation patch, a multi-layer circuit board, which is exemplified by only the number of layers of the multi-layer circuit board being 3, and the multi-layer circuit board portion is disposed in the reflective cavity. On the inner wall of the reflective cavity 3, two rows of openings are visible above and below the multilayer circuit board, which are provided to prevent the feed signal lines on the surface of the multilayer circuit board from short-circuiting with the inner wall of the reflective cavity. As shown in fig. 4, the antenna radiation patch is made transparent based on fig. 3, and then the antenna is seen from the side of the mobile terminal.
Example three:
referring to fig. 5-6, the structure of antenna feeding is shown. Fig. 5 is a schematic structural diagram of the antenna radiation patch, the low-loss material filled in the reflection cavity, and the structure on the multilayer circuit board except the feed structure, all of which are transparent. As shown in fig. 5, the "L" type feed line and the rectangular copper layer etched with the "T" type slot are horizontally polarized feed structures, and since the "L" type feed line is located on the uppermost layer of the multi-layer circuit board, i.e., the surface of the first layer of the circuit board, the openings provided at the uppermost row on the inner wall of the reflective cavity are provided to prevent the "L" type feed line and the inner wall of the reflective cavity from being short-circuited. The feed line at the lower side and the metal through hole connected with the feed line are vertically polarized feed structures. Also, since the feed line is located on the surface of the lowermost layer of the multilayer circuit board, i.e., the lowermost layer of the third layer of circuit board, the openings of the lowermost row on the inner wall of the reflective cavity are also provided to prevent the feed line from being short-circuited with the inner wall of the reflective cavity. FIG. 6 is a schematic view of the internal structure of a multilayer circuit board after three layers of plates from top to bottom are transparent,
the uppermost layer, namely the metal through hole in the first layer circuit board, is connected with an upper copper-attached layer of the first layer circuit board and a copper-attached layer between the first layer circuit board and the second layer circuit board; the metal through holes in the second layer circuit board are connected with a copper-attached layer between the first layer circuit board and the second layer circuit board and a copper-attached layer between the second layer circuit board and the third layer circuit board; the metal through hole in the third layer circuit board is connected with the copper-attached layer between the second layer circuit board and the third layer circuit board and the lower copper-attached layer of the third layer circuit board. The copper-attached layer between the first layer circuit board and the second layer circuit board is a copper-attached layer shared by the first layer circuit board and the second layer circuit board, and the copper-attached layer between the second layer circuit board and the third layer circuit board is a copper-attached layer shared by the second layer circuit board and the third layer circuit board. The metal through holes in each layer of the multilayer circuit board not only have the function of connecting copper-attached layers among different layers of the multilayer circuit board, but also have the function of connecting the upper surface and the lower surface of an opening arranged on the inner wall of the reflecting cavity for placing the multilayer circuit board.
Example four:
referring to fig. 7-9, another antenna feeding structure is shown, which is similar to the third embodiment. Fig. 7 is a schematic diagram of a structure of the mobile terminal after the low-loss material and the antenna radiation patch in the reflective cavity are made transparent when viewed from the side, and the number of layers of the multilayer circuit board in this embodiment is 4. In this embodiment, since the vertically polarized feed lines are inside the multilayer circuit board, the inner wall of the reflective cavity has only two rows of openings, and there are no openings in the lowest row in the second embodiment. Fig. 8 is a schematic structural diagram of the antenna radiation patch, the low-loss material filled in the reflection cavity, and the structure on the multilayer circuit board except the feed structure after being transparent. The horizontally polarized feed structure in which the "L" type feed line and the copper-clad layer etched with the "T" type groove are the same as in the third embodiment. The connection point of the metal via and the feeder line in the vertically polarized feed structure is at the uppermost end of the metal via, while in the third embodiment, the connection point of the metal via and the feeder line is at the lowermost end of the metal via. In the embodiment, the metal through holes in the third layer of circuit board are connected with a copper-attached layer between the second layer of circuit board and the third layer of circuit board and a copper-attached layer between the third layer of circuit board and the fourth layer of circuit board; the metal through holes in the fourth layer of circuit board are connected to the copper-attached layer between the third layer of circuit board and the fourth layer of circuit board and the lower copper-attached layer of the fourth layer of circuit board.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (6)

1. The utility model provides an integrated dual polarization 5G antenna on mobile terminal metal frame, includes equipment shell, multilayer circuit board and at least one antenna element, equipment shell includes back of the body lid and metal frame, its characterized in that: the antenna unit comprises a reflection cavity integrated on the metal frame, an antenna feed part printed on the multilayer circuit board and an antenna radiation patch positioned in the reflection cavity, wherein the multilayer circuit board is at least two layers;
the horizontally polarized feed part of the antenna feed part is a rectangular copper-attached layer formed by coupling and etching a T-shaped groove through an L-shaped feed line, the rectangular copper-attached layer is connected with the ground of the multilayer circuit board, and magnetic current along the horizontal direction is formed by coupling the T-shaped groove through the feed line;
the vertically polarized feed portion of the antenna feed portion is composed of a metal through hole parallel to the thickness direction of the multilayer circuit board and a feed line perpendicular to the thickness direction of the multilayer circuit board.
2. The dual polarized 5G antenna integrated on a metal bezel of a mobile terminal as claimed in claim 1, wherein: the reflection cavity is a cavity formed by inwards recessing the metal frame, and low-loss materials are filled in the reflection cavity.
3. The dual polarized 5G antenna integrated on a metal bezel of a mobile terminal as claimed in claim 2, wherein: the antenna radiating patch is located on the surface of the low loss material.
4. The dual polarized 5G antenna integrated on a metal bezel of a mobile terminal as claimed in claim 1, wherein: the inner wall of the reflection cavity is provided with an opening, and the multilayer circuit board is located in the opening.
5. The dual polarized 5G antenna integrated on the metal bezel of a mobile terminal as claimed in claim 4, wherein: the metal frame comprises a top metal frame positioned at the top of the mobile terminal and a side metal frame positioned on the side of the mobile terminal.
6. The dual polarized 5G antenna integrated on the metal bezel of the mobile terminal as recited in claim 5, wherein: the dual-polarized 5G antenna is positioned on the top metal frame, or on the side metal frame, or on the top metal frame and the side metal frame simultaneously.
CN201810410977.9A 2018-05-02 2018-05-02 Dual-polarized 5G antenna integrated on metal frame of mobile terminal Active CN110444855B (en)

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WO2008148404A1 (en) * 2007-06-04 2008-12-11 Pirelli & C. S.P.A. Wireless network device including a polarization and spatial diversity antenna system
CN201540958U (en) * 2009-09-16 2010-08-04 泉州佳信天线有限公司 Horizontally polarized directional antenna
CN103703620A (en) * 2013-08-26 2014-04-02 华为技术有限公司 Wideband dual-polarization array antenna and base station
CN206610904U (en) * 2017-04-18 2017-11-03 西安工程大学 A kind of shell of wearable device
CN107528119A (en) * 2017-06-27 2017-12-29 捷开通讯(深圳)有限公司 A kind of antenna assembly and terminal
CN107872936A (en) * 2016-09-28 2018-04-03 华为机器有限公司 A kind of metal-back of mobile device and preparation method thereof, mobile device

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Publication number Priority date Publication date Assignee Title
JP4007340B2 (en) * 2003-09-19 2007-11-14 セイコーエプソン株式会社 Electro-optical device, electronic apparatus, and method of manufacturing electro-optical device
TWM346129U (en) * 2008-04-15 2008-12-01 Jstream Technologies Inc Outdoor antenna box

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1601046A1 (en) * 2004-05-28 2005-11-30 Huber + Suhner Ag Antenna housing and antenna equipped with such a housing
WO2008148404A1 (en) * 2007-06-04 2008-12-11 Pirelli & C. S.P.A. Wireless network device including a polarization and spatial diversity antenna system
CN201540958U (en) * 2009-09-16 2010-08-04 泉州佳信天线有限公司 Horizontally polarized directional antenna
CN103703620A (en) * 2013-08-26 2014-04-02 华为技术有限公司 Wideband dual-polarization array antenna and base station
CN107872936A (en) * 2016-09-28 2018-04-03 华为机器有限公司 A kind of metal-back of mobile device and preparation method thereof, mobile device
CN206610904U (en) * 2017-04-18 2017-11-03 西安工程大学 A kind of shell of wearable device
CN107528119A (en) * 2017-06-27 2017-12-29 捷开通讯(深圳)有限公司 A kind of antenna assembly and terminal

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