CN107394348B - Antenna assembly and mobile terminal - Google Patents
Antenna assembly and mobile terminal Download PDFInfo
- Publication number
- CN107394348B CN107394348B CN201710404416.3A CN201710404416A CN107394348B CN 107394348 B CN107394348 B CN 107394348B CN 201710404416 A CN201710404416 A CN 201710404416A CN 107394348 B CN107394348 B CN 107394348B
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- antenna
- resonance unit
- resonance
- unit
- mobile terminal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
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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
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- 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
- H01Q5/30—Arrangements for providing operation on different wavebands
Abstract
The invention discloses an antenna assembly and a mobile terminal, wherein the antenna assembly comprises: a substrate; a first antenna and a second antenna on the substrate; the first antenna comprises a first resonance unit and a third resonance unit, and the third resonance unit is arranged on the first resonance unit; the second antenna comprises a second resonance unit; the first resonance unit is used for realizing the resonance of the first frequency band antenna, and the second resonance unit and the third resonance unit are matched for realizing the resonance of the second frequency band antenna. By the mode, the antenna bandwidth can be expanded, the high-frequency wireless performance of the antenna is met, the size of the antenna is small, and the occupied space of the antenna is saved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an antenna assembly and a mobile terminal.
Background
At present, mobile phones or data terminal products mostly require WIFI to support various protocols such as 802.11b/g/n/ac, and require a WIFI antenna to support two frequency bands of 2.4GHz and 5.0 GHz. Wherein the low frequency covers 2.4-2.4835 GHz, and the high frequency covers 5.150-5.850 GHz.
However, most of the existing dual-band antennas have insufficient bandwidth at high frequency, which results in poor frequency consistency of wireless performance of the device at high frequency, or large occupied area of the antenna under the condition of meeting performance requirements, which is unfavorable for the development of pursuing portability of data terminal products.
Disclosure of Invention
The invention mainly solves the technical problem of providing an antenna component and a mobile terminal, so that the bandwidth of a dual-frequency antenna is expanded, the wireless performance of the antenna at high frequency is met, the size of the antenna is small, and the occupied space of the antenna is saved.
In order to solve the above technical problem, one technical solution adopted by the present invention is to provide an antenna assembly, including: a substrate; a first antenna and a second antenna on the substrate; the first antenna comprises a first resonance unit and a third resonance unit, and the third resonance unit is arranged on the first resonance unit; the second antenna comprises a second resonance unit; the first resonance unit is used for realizing the resonance of the first frequency band antenna, and the second resonance unit and the third resonance unit are matched for realizing the resonance of the second frequency band antenna.
In order to solve the technical problem, another technical solution adopted by the present invention is to provide a mobile terminal, where the mobile terminal includes the antenna assembly as described above.
The invention has the beneficial effects that: different from the situation of the prior art, the first resonance unit realizes the resonance of the first frequency band antenna, and the second resonance unit is matched with the third resonance unit to realize the resonance of the second frequency band antenna, so that the dual-frequency antenna realizes the expansion of bandwidth and meets the wireless performance of the antenna at high frequency; in addition, the third resonant unit is arranged on the first resonant unit, so that the size of the antenna can be reduced, and the occupied space of the antenna is saved.
Drawings
FIG. 1 is a schematic structural diagram of one embodiment of an antenna assembly of the present invention;
FIG. 2 is a schematic diagram of a mobile terminal according to an embodiment of the present invention;
fig. 3 is a partial structural diagram of the mobile terminal in fig. 2;
FIG. 4 is a detailed structural schematic diagram of the antenna assembly of FIG. 3;
fig. 5 is a return loss plot for the antenna assembly of fig. 4.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an antenna assembly 10 according to an embodiment of the present invention, the antenna assembly including: a base 12; a first antenna 14 and a second antenna 16, both located on the substrate 12; the first antenna 14 includes a first resonance unit 141 and a third resonance unit 143, the third resonance unit 143 being disposed on the first resonance unit 141; the second antenna 16 includes a second resonance unit 162; the first resonance unit 141 is used for realizing the first frequency band antenna resonance, and the second resonance unit 162 and the third resonance unit 143 are used for realizing the second frequency band antenna resonance in cooperation. The first frequency band in the present invention may be a low frequency band or a high frequency band. It is to be understood that when the first frequency band is a low frequency band, the second frequency band may be a high frequency band; when the first band is a high band, the second band may be a low band.
Since the resonant length of an antenna is proportional to the wavelength of its resonant frequency, the resonant length of the antenna is longer as the resonant frequency is lower. Therefore, since the third resonance unit 143 is disposed on the first resonance unit 141, the first frequency band should be lower than the second frequency band in this embodiment in theory. In practical applications, the third resonant unit 143 may be modified to increase its resonant length, for example, in a zigzag shape, so that the first frequency band is a high frequency band and the second frequency band is a low frequency band.
As an example, the antenna assembly 10 may be a PCB printed antenna; the first resonance unit 141 is a main resonance unit that can cover a low band frequency in the vicinity of 2.4 GHz; the second resonance unit 162 is a sub-resonance unit which resonantly excites the coupling energy from the first resonance unit 141, and the third resonance unit 143 is provided on the first resonance unit 141, and the second resonance unit 162 and the third resonance unit 143 can form a broadband combination covering a high frequency band frequency in the region near 5 GHz.
In this embodiment, the antenna assembly 10 may implement the first frequency band antenna resonance through the first resonance unit 141, and implement the second frequency band antenna resonance through the cooperation of the second resonance unit 162 and the third resonance unit 143, so that the dual-frequency antenna implements the bandwidth expansion, and meets the radio performance of the antenna at high frequency; in addition, by disposing the third resonance unit 143 on the first resonance unit 141, the size of the antenna can be reduced, and the occupied space of the antenna can be saved.
As an implementation manner, the first resonance unit 141 is a monopole antenna, the resonance length of which is a quarter wavelength, and the first resonance unit 141 may cover a low-band frequency of 2.4GHz to 2.4835 GHz.
As an embodiment, the third resonant unit 143 is a slot disposed on the first resonant unit 141. The third resonant unit 143 can be regarded as a slot antenna having a resonant length of one half wavelength. Wherein, the shape of the gap can be a long strip, and the length is about half wavelength. The slot may be fed by a transmission line across its narrow side or by a resonant cavity. At this time, a radio frequency electromagnetic field is excited on the gap, and electromagnetic waves are radiated to the space.
The second resonance unit 162 is a monopole resonator arranged in parallel with the first resonance unit 141, the resonance length of the monopole resonator is a quarter wavelength, a gap is left between the first resonance unit 141 and the second resonance unit 162, and the width of the gap can be used for adjusting the second frequency band resonance of the second resonance unit 162. The second and third resonance units 162 and 143 may cover a high band frequency of 5.15GHz to 5.85 GHz.
As an implementation mode, the overall design length of the antenna component is smaller than or equal to 16mm, and the width of the antenna component is smaller than or equal to 8 mm. As the size and portability of the current mobile terminal are progressing, the available space of the antenna is becoming smaller and smaller, and in this condition, a small-sized design of the antenna is necessary.
Wherein the width of the slit of the third resonance unit 143 may be set to 0.5mm to 1 mm. Theoretically, the wider the width of the slot antenna, the wider the bandwidth thereof, and in the present embodiment, the slot width of the third resonance unit 143 may be set between 0.5mm and 1mm, for example, 0.5mm, 0.7mm, or 1mm, etc., due to the limitation of the overall design of the antenna assembly.
Also, the gap width between the first resonance unit 141 and the second resonance unit 162 is 0.5mm to 1mm, for example, the gap width is set to 0.5mm, 0.7mm, 1mm, or the like. It can be understood that by setting different gap widths, the second frequency band resonance of the second resonance unit 162 can be adjusted, so as to meet the frequency coverage requirement of the whole antenna assembly.
In this embodiment, by setting the sizes of the first antenna 14 and the second antenna 16, and by changing the gap width of the third resonant unit 143 and the gap width between the first resonant unit 141 and the second resonant unit 162, the bandwidth of the high-frequency region is adjusted, so that the antenna assembly can satisfy the radio performance at high frequency while saving the occupied space, thereby realizing full coverage at low frequencies of 2.4 to 2.4835GHz and high frequencies of 5.150 to 5.850 GHz. Referring to fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention, and fig. 3 is a schematic partial structural diagram of the mobile terminal in fig. 2. The mobile terminal 20 in this embodiment includes an antenna assembly 10, wherein the antenna assembly 10 is any one of the antenna assemblies described above.
The mobile terminal 20 may be a mobile phone, a notebook, a tablet computer, and the like.
As one possible embodiment, the mobile terminal 20 further includes a printed circuit board 24 and a floor 26; wherein the first antenna (not shown) is disposed on the printed circuit board and includes a feeding portion 140, the feeding portion 140 is disposed at a corner position of the printed circuit board 24, the feeding portion 140 further includes a feeding point 142 and a first grounding point 144, and the first antenna is coupled to the floor 26 through the first grounding point 144; a second antenna (not shown) is disposed on the pcb and includes a second grounding point 164, and the second antenna is coupled to the floor 26 via the second grounding point 164.
Referring further to fig. 4, fig. 4 is a detailed structural schematic diagram of the antenna element of fig. 3. As an implementation, the printed circuit board 24 may be made of a material having a dielectric constant of 3.8 to 6, such as 3.8, 4.4, or 6. It is known that the quarter wavelength of the electromagnetic wave of 2.4GHz to 2.4835GHz in the free space is about 30mm, but in the design of the present embodiment, the dielectric constant of the material used for the printed circuit board 24 is 4.4, so that it is necessary to consider the calculation of the resonance length of the antenna (4.4)0.5Considering the influence factors such as the effective length, the width of the antenna, and the area of the floor 26, the length of the first resonance unit 141 covering the frequency band of 2.4GHz to 2.4835GHz needs to be about 15 mm. Similarly, the second resonant unit 162 is a quarter-wave monopole resonator, the resonant frequency of the second resonant unit 162 is about 5.15GHz, and the length thereof may be about 7mm in consideration of the dielectric constant of the printed circuit board 24, the width of the gap between the first resonant unit 141 and the second resonant unit 162, the width of the second resonant unit 162, and the like. The third resonant unit 143 is a slot antenna with a half wavelength, and when the resonant frequency is 5.85GHz, the length thereof is about 12mm by considering factors such as the dielectric constant of the printed circuit board 24, the slot width of the third resonant unit 143 itself, and the like; in addition, the gap width of the third resonance unit 143 in this embodiment is set to 0.5mm, and the first resonance unit 141 and the second resonance unit 141 are providedThe gap width between the elements 162 is 0.5 mm; therefore, the antenna assembly can meet the small-size design that the length of the antenna assembly is less than or equal to 16mm and the width of the antenna assembly is less than or equal to 8mm, and meet the requirements that the antenna assembly covers the first frequency band from 2.4GHz to 2.4835GHz and the second frequency band from 5.15GHz to 5.85 GHz.
In order to verify that the frequency coverage of the antenna assembly meets the design requirements, the invention simulates the antenna assembly and measures the frequency, and the measurement result is shown in fig. 5. As can be seen from fig. 5, the antenna assembly can completely cover 2.4 to 2.4835GHz in the low frequency band region; in the high frequency band region, although the region of 5.75 to 5.85GHz is not covered as seen from the results shown in the figure, the antenna assembly in the present embodiment can satisfy the high frequency region of 5.150 to 5.850GHz by adjusting the slot width of the third resonance unit 143.
In this embodiment, because the design size of the antenna assembly 10 is small, the antenna assembly 10 occupies a small space of the mobile terminal 20, and the space of the mobile terminal 20 can be greatly saved, so as to realize the development of miniaturization and portability of the mobile terminal 20; in addition, the first resonant unit 141, the second resonant unit 162, and the third resonant unit 143 cooperate with each other, so that the mobile terminal 20 can satisfy the radio performance at a high frequency even in a case of saving an occupied space, and realize frequency coverage at a low frequency band and a high frequency band.
In other embodiments, the dielectric constant of the material used for the printed circuit board 24 is 6, so that it is considered when calculating the resonant length of the antenna (6)0.5The length of the first resonance unit 141 covering the 2.4GHz to 2.4835GHz band only needs to be about 13 mm. Similarly, the resonant frequency of the second resonant unit 162 is about 5.15GHz, and the length thereof may be about 6mm in consideration of the dielectric constant of the printed circuit board 24 and the like. When the resonant frequency of the third resonant unit 143 is 5.85GHz, the length thereof is about 10.5mm in consideration of the dielectric constant of the printed circuit board 24 and the like. The size and frequency coverage requirements of the antenna elements may also be met.
According to the antenna assembly and the mobile terminal, the sizes of the first antenna and the second antenna are set, and the bandwidth of a high-frequency area is adjusted by changing the gap width of the third resonant unit and the gap width between the first resonant unit and the second resonant unit, so that the antenna assembly can meet the radio performance at high frequency under the condition of saving occupied space, and the full coverage at low frequency of 2.4-2.4835 GHz and high frequency of 5.150-5.850 GHz is realized.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. An antenna assembly, comprising:
a substrate;
a first antenna and a second antenna on the substrate; the first antenna comprises a first resonance unit and a third resonance unit, and the third resonance unit is arranged on the first resonance unit; the second antenna comprises a second resonance unit; the first resonance unit is used for realizing the resonance of the first frequency band antenna, and the second resonance unit and the third resonance unit are matched for realizing the resonance of the second frequency band antenna; the second resonance unit is a monopole resonator arranged in parallel with the first resonance unit, the resonance length of the second resonance unit is a quarter wavelength, a gap is reserved between the first resonance unit and the second resonance unit, and the width of the gap is used for adjusting the resonance frequency of the second resonance unit; wherein the width of the gap is 0.5mm to 1 mm; the second resonance unit and the third resonance unit are matched to cover a second frequency band of the antenna assembly to be 5.15 GHz-5.85 GHz;
wherein the third resonance unit is surrounded by the first resonance unit; the third resonance unit is a gap arranged on the first resonance unit; the third resonance unit has a resonance length of one-half wavelength and a gap width of 0.5mm to 1 mm.
2. The antenna assembly of claim 1,
the first resonance unit is a monopole antenna, the resonance length of the first resonance unit is a quarter wavelength, and the first frequency band of the antenna assembly covered by the first resonance unit is 2.4 GHz-2.4835 GHz.
3. The antenna assembly of claim 1,
the antenna assembly has a length less than or equal to 16mm and a width less than or equal to 8 mm.
4. A mobile terminal, characterized in that,
the mobile terminal includes an antenna assembly as claimed in any one of claims 1 to 3.
5. The mobile terminal of claim 4, wherein the mobile terminal further comprises:
a printed circuit board and a floor;
the first antenna is arranged on the printed circuit board and comprises a feeding part, the feeding part is arranged at the corner position of the printed circuit board, the feeding part further comprises a feeding point and a first grounding point, and the first antenna is coupled with the floor through the first grounding point; the second antenna is disposed on the printed circuit board and includes a second ground point, and the second antenna is coupled to the floor through the second ground point.
6. The mobile terminal of claim 5,
the printed circuit board is made of a material having a dielectric constant of 3.8 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710404416.3A CN107394348B (en) | 2017-06-01 | 2017-06-01 | Antenna assembly and mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710404416.3A CN107394348B (en) | 2017-06-01 | 2017-06-01 | Antenna assembly and mobile terminal |
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| CN107394348A CN107394348A (en) | 2017-11-24 |
| CN107394348B true CN107394348B (en) | 2020-09-29 |
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| CN109687118B (en) * | 2018-11-22 | 2021-01-26 | 惠州Tcl移动通信有限公司 | Mobile terminal and antenna structure thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2284946A1 (en) * | 2009-07-17 | 2011-02-16 | Research In Motion Limited | Multi-slot antenna and mobile device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6043786A (en) * | 1997-05-09 | 2000-03-28 | Motorola, Inc. | Multi-band slot antenna structure and method |
| CN201383542Y (en) * | 2009-03-05 | 2010-01-13 | 佳邦科技股份有限公司 | Chip-type antenna device |
| CN101847785B (en) * | 2009-03-27 | 2013-12-18 | 立积电子股份有限公司 | Dual-frequency planar microstrip antenna |
| CN201918501U (en) * | 2010-12-01 | 2011-08-03 | 惠州Tcl移动通信有限公司 | Internal antenna with five frequency bands and bluetooth and mobile communication terminal with internal antenna |
| TW201427181A (en) * | 2012-12-25 | 2014-07-01 | Compal Electronics Inc | Multi-band antenna |
| CN204088565U (en) * | 2014-08-20 | 2015-01-07 | 瑞声精密制造科技(常州)有限公司 | WIFI antenna and apply the radio communication device of this WIFI antenna |
| US9647337B1 (en) * | 2014-12-19 | 2017-05-09 | Amazon Technologies, Inc. | Dual-band antenna with grounded patch and coupled feed |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2284946A1 (en) * | 2009-07-17 | 2011-02-16 | Research In Motion Limited | Multi-slot antenna and mobile device |
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Effective date of registration: 20200909 Address after: 315000 10 / F, No. 5, Lane 999, Yangfan Road, hi tech Zone, Ningbo City, Zhejiang Province Applicant after: TCL mobile communication technology (Ningbo) Co.,Ltd. Address before: 516006 Guangdong province Huizhou City Zhongkai high tech Zone and seven West Road No. 86 Applicant before: HUIZHOU TCL MOBILE COMMUNICATION Co.,Ltd. |
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