CN109411882B - Dual-frequency antenna structure for 5G metal frame mobile phone terminal - Google Patents
Dual-frequency antenna structure for 5G metal frame mobile phone terminal Download PDFInfo
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- CN109411882B CN109411882B CN201811377727.6A CN201811377727A CN109411882B CN 109411882 B CN109411882 B CN 109411882B CN 201811377727 A CN201811377727 A CN 201811377727A CN 109411882 B CN109411882 B CN 109411882B
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- 239000002184 metal Substances 0.000 title claims abstract description 122
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 122
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 19
- 238000002955 isolation Methods 0.000 abstract description 16
- 238000004088 simulation Methods 0.000 description 9
- 230000005855 radiation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005267 amalgamation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000005404 monopole Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
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
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Support Of Aerials (AREA)
- Telephone Set Structure (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention relates to a double-frequency antenna structure for a 5G metal frame mobile phone terminal, which comprises a metal frame and a metal front shell arranged in the metal frame, wherein an insulating bracket is arranged on one side of the metal frame corresponding to the metal front shell; the novel antenna is characterized in that a main board is arranged on the metal front shell, a copper layer is coated on one side of the main board opposite to the metal front shell, a plurality of antenna units are mounted on one side of the copper layer, each antenna unit comprises a feed port and a feed line, one end of each feed port is connected with the main board, the other end of each feed port is connected with the feed line, the feed line is of an L-shaped structure, the feed lines are mounted on an insulating support in a pasting mode, a first gap matched with each antenna unit is formed in the metal front shell, the first gap is parallel to the feed line, a second gap is formed in a metal frame, and the second gap is used for adjusting the resonant length of each antenna unit to be one quarter wavelength. The dual-frequency antenna structure achieves the purposes of miniaturization, dual-frequency band and high isolation of the antenna, and provides a feasible technical scheme for the design of the MIMO antenna of the 5G metal frame mobile phone terminal.
Description
Technical Field
The invention relates to the field of 5G mobile phone terminal antenna structure design, in particular to a double-frequency MIMO (Multiple-input Multiple-output) antenna structure for a 5G metal frame mobile phone terminal.
Background
With the increasing advancement of the fifth generation mobile communication technology (5G), the chinese industry and informatization department has officially issued declarations on 11/15 2017, and determined that the frequency bands of 3300-3600MHz and 4800-5000MHz are used as the low frequency operating frequency band of the 5G system. The low-frequency working frequency band of the 5G system is also regarded as the pioneer frequency band of the 5G network, and the design of the 5G mobile phone terminal antenna based on the low-frequency band is also gradually attracting attention. However, due to limitations of the size, the material and the antenna layout of the existing mobile phone, the design difficulty of the antenna structure of the 5G mobile phone terminal is increased.
The design difficulty of the 5G mobile phone terminal antenna structure based on the Sub-6GHz frequency band is how to combine the dual-frequency MIMO antenna technology with the 5G mobile phone terminal, and reasonably layout multiple antennas, so that the channel capacity and the signal transmission rate of the 5G mobile phone terminal equipment are improved. It is worth noting that in the design process of the 5G mobile phone terminal antenna structure, the appearance of the mobile phone terminal is also considered, and the commercial value of the 5G mobile phone terminal can be realized only if the aesthetic of consumers is met. At present, due to the aesthetic driving of consumers, the metal frame smart phone gradually brings about fashion trend and is popular. Therefore, the design of the dual-frequency antenna structure for the metal frame mobile phone terminal has very important practical significance and good application value.
At the beginning of the design of the dual-frequency antenna structure, the problems of miniaturization, multiple frequency bands, isolation, actual ID and structural design of the antenna are required to be considered. Aiming at the design of a dual-frequency antenna structure, a plurality of expert students in recent years also propose a plurality of 5G MIMO mobile phone terminal antenna structures working in the Sub-6GHz frequency band. As the document "weight-Port Orthogonally Dual-Polarized Antenna Array for 5G Smartphone Applications", an 8-port orthogonal dual polarized antenna array applied to a 5G mobile phone terminal is proposed, and the antenna array unit is composed of two different types of antennas (a C-type monopole of coupling feed and an L-type slot of coupling feed), so that orthogonal polarization characteristics are exhibited between the antennas. The antenna design scheme well solves the problem of isolation, but does not consider the dual-frequency operation characteristic of the antenna, the compactness of the structure and the design method of the metal frame. Document Conceptual design and implementation of a four-element MIMOantenna system packaged within a metallic handset discloses a design scheme of a 4×4MIMO antenna of a 5G metal frame mobile phone terminal, the antenna scheme is composed of 4 identical slot-shaped microstrip magnetic dipoles, and the antenna realizes good working characteristics, but the antenna size of the scheme is too large to be easily laid out in the mobile phone terminal. The literature "compact-antenna array in the smartphone for the 3.5-GHz LTE 8×8MIMOoperation" further proposes to design an 8×8MIMO metal frame mobile phone antenna by adopting a coupling feed mode, the isolation between antennas is improved by adding a neutralization line, the antenna works in a 3.5GHz frequency band, the isolation of the antenna structure is more than-12 dB, the size of the antenna occupying the side edge of the mobile phone is only 1×60mm < 2 >, however, the antenna structure of the scheme also works in a 3.5GHz single frequency band, and the clamping grooves and the volume keys in the mobile phone have great conflict to the final implementation of the scheme.
In summary, the design scheme of the 5G mobile phone terminal antenna has certain design problems, and is separated from practical engineering application. In view of this, the invention constructs a dual-frequency 4×4MIMO antenna structure for 5G metal frame mobile phone terminals, which cannot guarantee miniaturization, high isolation and dual-frequency operation characteristics of the antenna as much as possible, and can meet aesthetic requirements of consumers, thereby realizing good application value.
Disclosure of Invention
In order to solve the technical problems, the invention provides a dual-frequency antenna structure for a mobile phone terminal with a metal frame, which further adjusts a basic resonance mode of an antenna unit into a quarter-wavelength resonance mode by arranging a gap structure on the frame, so that the total length of the antenna unit is greatly reduced on the premise of ensuring the integrity of the frame of the mobile phone, and the compactness of the antenna unit is realized; at the same time, two different resonant paths are generated, and the dual-frequency operation of the antenna is realized.
A dual-frequency antenna structure for a 5G metal frame mobile phone terminal comprises a metal frame and a metal front shell arranged in the metal frame, wherein an insulating support is arranged on one side of the metal frame corresponding to the metal front shell; the metal front shell is provided with a main board, a copper layer is coated on one side of the main board opposite to the metal front shell, a plurality of antenna units are arranged on one surface of the copper layer, each antenna unit comprises a feed port and a feed line, one end of each feed line is connected with the main board through the feed port, the other end of each feed line is attached to the insulating support, and each feed line is L-shaped; the metal front shell is provided with a first gap matched with the feeder line, the first gap is parallel to the part of the feeder line attached to the insulating support, the metal frame is provided with a second gap matched with the first gap, the second gap is perpendicular to the first gap, and the second gap is used for adjusting the resonance length of the antenna unit to be one quarter wavelength.
Furthermore, the working frequency bands of the dual-frequency antenna structure for the metal frame mobile phone terminal are 3400-3600MHz and 4800-5000MHz.
Further, the metal frame is perpendicular to the metal front shell, and the length of the first gap is 17.5mm and the width of the first gap is 1.5mm; the length of the second gap is 5.7mm, and the width of the second gap is 2mm.
Further, the main board is of a U-shaped structure, and a battery matched with the main board structure is arranged on the metal front shell.
Further, plastic fillers are filled in the second gap and the first gap.
Further, the insulating support is attached to the metal frame, the insulating support is made of plastic materials, and the thickness of the insulating support is 0.4-0.6mm.
Further, four antenna units are arranged on the main board and symmetrically distributed along the long side direction of the metal frame, and the distance between adjacent antenna units is not less than 27mm.
Further, the four antenna units are distributed on the upper half part of the metal frame, and the distance between the antenna units and the short side of the metal frame is not less than 14mm.
Further, the main board is an FR-4 dielectric substrate, the relative dielectric constant of the FR-4 dielectric substrate is 4.3-4.5, the loss tangent is 0.015-0.025, and the thickness is 0.7-0.9mm.
The mobile phone terminal is a 5G mobile phone terminal, and the 5G mobile phone terminal comprises the antenna unit.
The beneficial technical effects of the invention are as follows:
(1) According to the dual-frequency antenna structure for the metal frame mobile phone terminal, the feeder lines in the antenna units are arranged to be of the L-shaped structure, and two different resonant paths are generated by reasonably arranging the positions of the antenna units, so that dual-frequency operation is realized.
(2) According to the dual-frequency antenna structure, the first gap is formed in the metal front shell, the second gap is formed in the metal frame, and the first gap is formed in the middle through the formed second gap, so that the basic resonance mode of the antenna unit is adjusted to be a quarter-wavelength resonance mode, the total length of the antenna unit is greatly reduced, and the compact layout of the antenna unit is realized.
(3) Through rationally optimizing the distance between each antenna element for the antenna element has higher isolation, has satisfied the requirement of cell-phone to the isolation, also reserves layout areas such as draw-in groove, volume key on the metal frame simultaneously, provides a feasible technical scheme for the design of 5G metal frame cell-phone terminal dual-frenquency MIMO antenna.
Drawings
Fig. 1 is a schematic diagram of a dual-band antenna for a metal frame mobile phone terminal in embodiment 1.
Fig. 2 is a schematic structural diagram of an antenna unit according to embodiment 1
Fig. 3 is a top view of an antenna unit of embodiment 1
FIG. 4 schematic diagram of simulated reflection coefficients of four antenna elements of embodiment 2
FIG. 5 shows the measured reflection coefficients of four antenna elements of embodiment 2
Fig. 6 example 2 simulated isolation between adjacent antenna elements versus frequency
Fig. 7 example 2 measured isolation between adjacent antenna elements versus frequency
Fig. 8 simulation of two-dimensional radiation directions of four antenna elements in example 2 at 3.5GHz frequency point
FIG. 9 simulation two-dimensional radiation pattern of four antenna elements in example 2 at 4.9GHz frequency
Fig. 10 is a graph showing the frequency dependence of the simulated total efficiency of four antenna elements in embodiment 2
Fig. 11 shows the frequency dependence of the measured total efficiency of four antenna elements in embodiment 2
Fig. 12 is a schematic diagram showing various structural changes of the antenna unit in embodiment 2.
Reference numerals:
1-metal frame, 11-second slot, 2-antenna unit, 21-feed port, 22-feed line, 3-battery, 4-main board, 5-metal front shell, 51-first slot, 6-copper layer, 7-insulating support
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar components; the terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limiting the present patent.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention will be more readily understood by those skilled in the art, thereby more clearly defining the scope of the present invention.
Example 1:
as shown in fig. 1, the present embodiment provides a dual-frequency antenna structure for a metal frame mobile phone terminal, which includes a metal frame 1 and a metal front shell 5 disposed in the metal frame 1, wherein an insulating support 7 is disposed on a side of the metal frame 1 corresponding to the metal front shell 5, the insulating support 7 is attached to an inner side of the metal frame 1, and the insulating support 7 is made of a plastic material, and has a thickness of 0.4-0.6mm, preferably 0.5mm. Be equipped with mainboard 4 on the metal preceding shell 5, mainboard 4 is U type structure, be equipped with on the metal preceding shell 5 with mainboard 4 structure assorted battery 3, the shape after battery 3 and the mainboard 4 amalgamation is with metal preceding shell 5 assorted. In this embodiment, the motherboard 4 is an FR-4 dielectric substrate, the FR-4 dielectric substrate has a relative dielectric constant ranging from 4.3 to 4.5, preferably 4.4, a loss tangent ranging from 0.015 to 0.025, preferably 0.02, and a thickness controlled between 0.7 and 0.9mm, preferably 0.8mm. The main board 4 is coated with a copper layer 6 on the side opposite to the metal front shell 5, four antenna units 2 are mounted on one side of the copper layer 6 of the main board 4, the four antenna units 2 are symmetrically distributed along the long side direction of the metal frame 1, and the distance between the adjacent antenna units 2 is greater than or equal to 27mm, so that a compact structure is realized, and generally 27mm is preferable. The distance between adjacent antenna units 2 is controlled to be a reserved area for installing clamping grooves, volume keys and the like on the metal frame 1. In this embodiment, the four antenna units 2 are all distributed on the upper half of the metal frame 1, and the distance between the antenna units 2 and the short side of the metal frame 1 is controlled to be 14mm, and the area is mainly used for laying out a 2G antenna structure, a 3G antenna structure and a 4G antenna structure. And the four antenna units 2 are uniformly distributed on the upper half part of the metal frame 1, so that adverse effects on the antenna units 2 when a mobile phone is held by hand can be effectively avoided.
As shown in fig. 2 and 3, each of the antenna units 2 includes a feed port 21 and a feed line 22, one end of the feed port 21 is connected to the main board 4, the other end is connected to the feed line 22, the feed line 22 has an L-shaped structure, one side of the L-shaped feed line 22 is connected to the feed port 21, and the other side of the L-shaped feed line 22 is attached to the insulating holder 7. The metal front shell 5 is provided with a first slot 51 matched with the antenna unit 2, and the first slot 51 is parallel to the part of the feeder 22 attached to the insulating bracket 7. The metal frame 1 is provided with a second slot 11 matched with the first slot 51, the second slot 11 is perpendicular to the first slot 51, and the second slot 11 is used for adjusting the resonant length of the antenna unit 2 to be a quarter wavelength. For the attractive appearance of the mobile phone, the second gap 11 and the first gap 51 are filled with fillers, and the fillers are preferably transparent plastic fillers, so that the attractive appearance requirement of the whole mobile phone terminal is better met under the condition of ensuring good signal transmission. In this embodiment, the working frequency bands of the dual-band antenna structure for the metal frame mobile phone terminal are 3400-3600MHz and 4800-5000MHz. Correspondingly, the metal frame 1 is vertically arranged with the metal front shell 5, and the length of the first gap 51 is 17.5mm, and the width is 1.5mm; the second slit 11 has a length of 5.7mm and a width of 2mm.
The working principle of the dual-band antenna unit 2 is as follows:
according to the technical scheme, the feed port 21 in the antenna unit 2 is connected with the feed line 22, the feed line 22 is further arranged into an L-shaped structure, two different resonant paths are generated by reasonably arranging the positions of the antenna unit 2, and double-frequency operation is achieved. In addition, the first gap 51 is formed on the metal front shell 5, the second gap 11 is formed on the metal frame 1, and the first gap is in an open state by controlling the position of the second gap, so that the basic resonance mode of the antenna unit 2 is adjusted to be a quarter-wavelength resonance mode, the total length of the antenna unit 2 is reduced under the condition that the appearance of the metal frame 1 is attractive, and the compact layout of the antenna unit 2 is realized. Most importantly, the distance between the antenna units 2 is reasonably optimized, so that the antenna units 2 have higher isolation, and the requirement of the mobile phone antenna on the isolation is met.
Example 2:
the embodiment provides a mobile phone terminal, the length of the mobile phone terminal is 150mm, and the width of the mobile phone terminal is 75mm. The mobile phone terminal is a 5G mobile phone terminal, and the 5G mobile phone terminal includes the antenna unit described in embodiment 1. The mobile phone terminal specifically comprises a metal frame 1 and a metal front shell 5 arranged in the metal frame 1, wherein an insulating bracket 7 is arranged on one side of the metal frame 1 corresponding to the metal front shell 5; the metal front shell 5 is provided with a main board 4, and one side of the main board 4 opposite to the metal front shell 5 is covered with a copper layer 6. The height of the metal frame 1 is 5.7mm, the thickness of the metal frame 1 is controlled to be 1.2mm, and the thickness of the insulating support 7 attached to the inner side of the metal frame 1 is controlled to be 0.5mm. The metal frame 1 is arranged perpendicular to the metal front shell 5, and the thickness of the metal front shell 5 is preferably 0.5mm. In this embodiment, the metal frame 1 is connected with the metal front shell 5 at a position 1.5mm away from the lower edge of the metal frame, and a vacancy of 1.5mm is used for installing an adaptive mobile phone screen, so as to meet the overall size requirement of the mainstream high-end smart mobile phone. The main board 4 is of a U-shaped structure, the metal front shell 5 is provided with a battery 3 matched with the main board 4 in structure, and the size of the battery 3 is 90mm multiplied by 45mm multiplied by 3.5mm. The main board 4 is provided with four antenna units 2 on one side corresponding to the copper layer 6, the four antenna units 2 are symmetrically distributed along the long side direction of the metal frame 1, the distance between adjacent antenna units 2 is equal to 27mm, the four antenna units 2 are distributed on the upper half part of the metal frame 1, and the distance between the antenna units 2 and the short side of the metal frame 1 is equal to 14mm. The structural layout of each group of antenna units 2 is the same as that in the embodiment 1, and the working frequency bands of the dual-frequency mobile phone are 3400-3600MHz and 4800-5000MHz. The length of the first gap 51 is 17.5mm, and the width is 1.5mm; the second slit 11 has a length of 5.7mm and a width of 2mm.
According to the antenna structure described in the technical scheme provided by the embodiment, modeling simulation is further performed by using HFSS15.0 electromagnetic simulation, and various coefficients of the simulation model are compared with actual measurement coefficients of the dual-frequency mobile phone terminal antenna in the embodiment, and the comparison result is shown in fig. 4-11. Fig. 4 and fig. 5 are graphs of simulation and measured reflection coefficient versus frequency for the four antenna units 2 in embodiment 2, respectively, wherein S11, S22, S33 and S44 represent the four antenna units 2, respectively. As can be seen from the figure, the simulation and actual measurement results have higher matching degree, and the-6 dB impedance bandwidths of the four antenna units 2 cover Sub-6GHz frequency bands, namely 3400-3600MHz and 4800-5000MHz, so that the double-frequency working requirements of the 5G metal frame mobile phone terminal antenna are met. Fig. 6 and fig. 7 respectively show simulated and actually measured isolation curves of adjacent antenna units 2 along with frequency, and it can be seen from the figures that the isolation between adjacent antenna units 2 is greater than-11 dB, so as to meet the design requirement of the mobile phone on the isolation of the antenna units 2. Fig. 8 and 9 show simulated two-dimensional radiation patterns of the antenna unit 2 at two frequency points of 3.5GHz and 4.9GHz, respectively. As can be seen from the figure, the four antenna units 2 achieve wide beam coverage at the frequency points of 3.5GHz and 4.9GHz, and the maximum gain can reach 2.1dBi and 4.6dBi respectively. In addition, fig. 10 and 11 are graphs of the simulation and actual measurement of the total efficiency of the four antenna units 2 with frequency change in embodiment 2, and the comparison result shows that the total efficiency of the four antenna units 2 in the working frequency range is distributed between 60% and 80%, the actual measurement efficiency is about 10% lower than the simulation efficiency, and the four antenna units 2 relatively maintain good radiation characteristics. In summary, the 4×4 dual-frequency MIMO antenna structure applied to the 5G metal frame mobile phone terminal provided in this embodiment has good impedance matching characteristics, higher unit isolation characteristics and radiation characteristics in the working frequency band, and on the basis of implementing dual frequencies, the compact distribution of the 4×4 dual-frequency MIMO terminal antenna is ensured, so that the requirements of engineering implementation are easily satisfied, and further application and popularization are facilitated.
The embodiment 1 and the embodiment 2 are just one implementation manner of the present technical solution, and the structural distribution of the antenna unit 2 may be further improved, for example, as shown in three improved technical solutions a, b, and c in fig. 12, so long as the routing of the feeder 22 in the antenna unit 2 is changed based on the design principle of the present technical solution, or the structures of the metal front shell 5 and the first slot 51 and the second slot 11 in the metal frame 1 are changed, and the improved antenna unit should be within the protection scope of the present invention.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. The double-frequency antenna structure for the 5G metal frame mobile phone terminal is characterized by comprising a metal frame (1) and a metal front shell (5) arranged in the metal frame (1), wherein an insulating bracket (7) is arranged on one side of the metal frame (1) corresponding to the metal front shell (5); the metal front shell (5) is provided with a main board (4), one side of the main board (4) opposite to the metal front shell (5) is covered with a copper layer (6), one side of the main board (4) is provided with a plurality of antenna units (2), each antenna unit (2) comprises a feed port (21) and a feed line (22), one end of the feed line (22) is connected with the main board (4) through the feed port (21), the other end of the feed line is attached to an insulating bracket (7), and the feed line (22) is L-shaped; the antenna is characterized in that a first gap (51) matched with the power supply line (22) is formed in the metal front shell (5), the first gap (51) is parallel to the part, attached to the insulating support (7), of the power supply line (22), a second gap (11) matched with the first gap (51) is formed in the metal frame (1), and the second gap (11) is used for adjusting the resonance length of the antenna unit (2) to be one quarter wavelength.
2. The dual-band antenna structure for a 5G metal bezel mobile phone terminal as claimed in claim 1, wherein the dual-band antenna structure for a metal bezel mobile phone terminal has operating frequency bands of 3400-3600MHz and 4800-5000MHz.
3. A dual-band antenna structure for a 5G metal bezel mobile phone terminal as claimed in claim 2, wherein said metal bezel (1) is arranged perpendicular to the metal front case (5), and said first slit (51) has a length of 17.5mm and a width of 1.5mm; the second gap (11) is 5.7mm long and 2mm wide.
4. The dual-band antenna structure for a 5G metal bezel mobile phone terminal as claimed in claim 1, wherein the main board (4) is of a U-shaped structure, and the metal front case (5) is provided with a battery (3) matched with the main board (4) in structure.
5. A dual-band antenna structure for a 5G metal bezel phone terminal as claimed in claim 1, characterized in that said second slot (11) and said first slot (51) are filled with plastic filler.
6. The dual-frequency antenna structure for the 5G metal frame mobile phone terminal according to claim 1, wherein the insulating support (7) is attached to the metal frame (1), the insulating support (7) is made of plastic materials, and the thickness of the insulating support (7) is 0.4-0.6mm.
7. The dual-frequency antenna structure for the 5G metal frame mobile phone terminal according to claim 1, wherein four antenna units (2) are disposed on the main board (4), the four antenna units (2) are symmetrically distributed along the long side direction of the metal frame (1), and the distance between adjacent antenna units (2) is not less than 27mm.
8. The dual-band antenna structure for a 5G metal bezel mobile phone terminal as claimed in claim 7, wherein four antenna units (2) are distributed on the upper half part of the metal bezel (1), and the distance between the antenna units (2) and the short side of the metal bezel (1) is not less than 14mm.
9. The dual-band antenna structure for a 5G metal bezel mobile phone terminal as defined in claim 1, wherein said main board (4) is an FR-4 dielectric substrate, and said FR-4 dielectric substrate has a relative dielectric constant of 4.3-4.5, a loss tangent of 0.015-0.025, and a thickness of 0.7-0.9mm.
10. A mobile phone terminal, characterized in that the mobile phone terminal is a 5G mobile phone terminal, and the 5G mobile phone terminal comprises a dual-frequency antenna structure for a 5G metal frame mobile phone terminal according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811377727.6A CN109411882B (en) | 2018-11-19 | 2018-11-19 | Dual-frequency antenna structure for 5G metal frame mobile phone terminal |
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| CN201811377727.6A CN109411882B (en) | 2018-11-19 | 2018-11-19 | Dual-frequency antenna structure for 5G metal frame mobile phone terminal |
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| CN109411882A CN109411882A (en) | 2019-03-01 |
| CN109411882B true CN109411882B (en) | 2024-03-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110112540B (en) * | 2019-04-08 | 2024-01-16 | 深圳市信维通信股份有限公司 | 5G dual-frequency MIMO antenna and mobile terminal equipment |
| CN110350312B (en) * | 2019-07-04 | 2020-08-25 | 北京理工大学 | 5G mobile terminal MIMO antenna based on circuit decoupling |
| CN112216954B (en) * | 2019-07-11 | 2023-06-30 | 北京小米移动软件有限公司 | Electronic device and mounting method thereof |
| CN111478049B (en) * | 2020-04-10 | 2021-10-22 | 维沃移动通信有限公司 | Electronic equipment |
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