CN107994345B - Antenna of mobile terminal and mobile terminal - Google Patents
Antenna of mobile terminal and mobile terminal Download PDFInfo
- Publication number
- CN107994345B CN107994345B CN201710937441.8A CN201710937441A CN107994345B CN 107994345 B CN107994345 B CN 107994345B CN 201710937441 A CN201710937441 A CN 201710937441A CN 107994345 B CN107994345 B CN 107994345B
- Authority
- CN
- China
- Prior art keywords
- radiating element
- variable
- resonance
- antenna
- band
- 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.)
- Active
Links
Images
Classifications
-
- 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
- H01Q5/10—Resonant antennas
-
- 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
- H01Q1/2258—Supports; Mounting means by structural association with other equipment or articles used with computer equipment
-
- 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
-
- 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
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Support Of Aerials (AREA)
- Telephone Set Structure (AREA)
Abstract
The invention discloses an antenna of a mobile terminal and the mobile terminal, the antenna of the mobile terminal comprises: the first radiating unit is used for providing resonance of a first frequency band, and comprises a main body part and a branch part extending from the main body part, wherein the main body part of the first radiating unit is connected with a printed circuit board of the mobile terminal through a feed sheet and is connected with a ground plane of the printed circuit board through a short-circuit sheet; the second radiation unit is used for providing resonance of a second frequency band and is connected to the main body part of the first radiation unit; the third radiating unit is used for providing resonance of a downlink sub-frequency band of a third frequency band and is connected to the main body part of the first radiating unit; and the variable radiation unit is used for providing resonance of the uplink sub-band of the third frequency band and is connected to the feeding sheet. Through the antenna of the mobile terminal, technical support can be provided for effectively reducing the SAR value.
Description
Technical Field
The present invention relates to the field of antenna technologies, and in particular, to an antenna of a mobile terminal and a mobile terminal.
Background
With the rapid development of wireless communication technology, more and more frequency bands are required to be supported by a mobile terminal, and the space of the antenna of the existing mobile terminal is smaller and smaller, so that the requirement on the antenna of the mobile terminal is stricter.
The SAR (Specific Absorption Rate) value is an electromagnetic power absorbed or consumed per unit mass of human tissue, and is expressed in W/kg, and generally, the smaller the SAR value, the better.
The inventor of the present application found in long-term research that conventional PIFA (Planar Inverted-F Antenna) and IFA (Inverted-F Antenna) antennas have a SAR value at a high frequency band that hardly meets the current test requirements.
Disclosure of Invention
The invention mainly solves the technical problem of providing the antenna of the mobile terminal and the mobile terminal, and can provide technical support for effectively reducing the SAR value.
In order to solve the technical problems, the invention adopts a technical scheme that: an antenna of a mobile terminal is provided, including:
the first radiating unit comprises a main body part and a branch part extending from the main body part, wherein the main body part of the first radiating unit is connected with a printed circuit board of the mobile terminal through a feed sheet and is connected with a ground plane of the printed circuit board through a short-circuit sheet;
a second radiation unit for providing resonance in a second frequency band, the second radiation unit being connected to the main body portion of the first radiation unit;
a third radiating element, configured to provide resonance in a downlink sub-band of a third frequency band, and connected to the main body portion of the first radiating element;
and the variable radiation unit is used for providing resonance of the uplink sub-band of the third frequency band and is connected to the feed sheet.
In order to solve the technical problem, the invention adopts another technical scheme that: there is provided a mobile terminal comprising an antenna for a mobile terminal as defined in any of the above.
The invention has the beneficial effects that: unlike the prior art, the antenna of the mobile terminal in the present invention includes: the variable radiation unit comprises a first radiation unit for providing resonance of a first frequency band, a second radiation unit for providing resonance of a second frequency band, a third radiation unit for providing resonance of a downlink sub-frequency band of a third frequency band and a variable radiation unit for providing resonance of an uplink sub-frequency band of the third frequency band, and technical support can be provided for effectively reducing the SAR value by providing the resonance of the third frequency band through different radiation units.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
fig. 1 is a schematic structural diagram of an embodiment of a mobile terminal according to the present invention in which an antenna is mounted in the mobile terminal;
FIG. 2 is a schematic view of the embodiment of FIG. 1 at another angle;
fig. 3 is a schematic diagram of the antenna of fig. 1 in an application scenario;
FIG. 4 is a return loss plot of the antenna of FIG. 1 in an application scenario;
FIG. 5 is a return loss plot of the antenna of FIG. 1 in another application scenario;
FIG. 6 is a return loss plot of the antenna of FIG. 1 in yet another application scenario;
fig. 7 is a schematic structural diagram of an embodiment of a mobile terminal according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, fig. 1 and 2 are schematic diagrams of an antenna of a mobile terminal according to an embodiment of the present invention installed at different angles in the mobile terminal, the antenna of the mobile terminal including: a first radiation unit 10, a second radiation unit 20, a third radiation unit 30, and a variable radiation unit 40.
The first radiation unit 10 is configured to provide resonance in the first frequency band, and specifically, in the present embodiment, the first radiation unit 10 includes a main body portion 101 and a branch portion 102 extending from the main body portion 101, the main body portion 101 of the first radiation unit 10 is connected to the printed circuit board 80 of the mobile terminal through the feeding sheet 60, the printed circuit board 80 is a provider of electrical connection of electronic components, and errors in wiring and assembly can be greatly reduced by using the printed circuit board 80 in the mobile terminal.
Specifically, the main body 101 of the first radiating element 10 is connected to an energy output port (not shown) on the printed circuit board 80 of the mobile terminal through the feeding sheet 60 to ensure energy transmission and radiation.
Alternatively, in an application scenario of the present embodiment, as shown in fig. 1, the branch part 102 includes a first branch part 1021, a second branch part 1022, and a third branch part 1023 that are spatially connected to each other. Meanwhile, the main body 101 of the first radiating element 10 is connected to the ground plane 81 of the printed circuit board 80 via the shorting tab 50, and is mainly used for optimizing the antenna impedance.
It should be noted that the size and the position of the feeding tab 60 are adjustable, and in fig. 1, the position of the feeding tab 60 is only a schematic illustration and is not a limitation.
The second radiation unit 20 is configured to provide resonance in the second frequency band, and the second radiation unit 20 is connected to the main body 101 of the first radiation unit 10, optionally, as shown in fig. 1 and fig. 2, in an application scenario of the present embodiment, the second radiation unit 20 is L-shaped.
The third radiating element 30 is configured to provide resonance of a downlink sub-band of the third frequency band, that is, the third radiating element 30 is configured to receive signals, and the third radiating element 30 is connected to the main body 101 of the first radiating element 10, optionally, as shown in fig. 1 and fig. 2, in an application scenario of the present embodiment, the third radiating element 30 is U-shaped.
The variable radiating element 40 is configured to provide resonance of the uplink sub-band of the third frequency band, that is, the variable radiating element 40 is configured to transmit signals, and the variable radiating element 40 is connected to the feeding sheet 60.
That is, in the present embodiment, the third radiating element 30 and the variable radiating element 40 cooperate with each other to provide the resonance of the third frequency band, meanwhile, since the third radiating element 30 provides the resonance of the downlink sub-frequency band, there is no need to worry about the SAR value, and the variable radiating element 40 provides the resonance of the uplink sub-frequency band, and the physical length of the radiating element can be designed to be greater than the quarter wavelength of the uplink sub-frequency band of the corresponding third frequency band, so that technical support can be provided for effectively reducing the SAR value.
It is to be understood that, in the present embodiment, the shape and the positional relationship of each radiation unit are not limited, and the specific shape and the positional relationship may be set by a designer according to design requirements, and are not limited herein.
The antenna of the mobile terminal in the above embodiment includes: the variable radiation unit comprises a first radiation unit for providing resonance of a first frequency band, a second radiation unit for providing resonance of a second frequency band, a third radiation unit for providing resonance of a downlink sub-frequency band of a third frequency band and a variable radiation unit for providing resonance of an uplink sub-frequency band of the third frequency band, and technical support can be provided for effectively reducing the SAR value by providing the resonance of the third frequency band through different radiation units.
Optionally, in an application scenario of this embodiment, the first frequency band and the second frequency band are low frequency bands, and the third frequency band is a high frequency band.
With continuing reference to fig. 1, optionally, in an application scenario of the present embodiment, the variable radiating element 40 is connected to the ground plane 81 through the first variable capacitor 70, and is connected to the shorting tab 50 through the second variable capacitor 71, so that the resonant frequency range can be adjusted by adjusting the operating states of the first capacitor 70 and the second capacitor 71. Compare in prior art with variable capacitance use in the matching circuit of antenna feed mouth, this application scene with variable capacitance interpolation to the antenna body on, can adjust the resonant frequency of antenna more in a flexible way.
Optionally, in other application scenarios, the number of the variable capacitors may be more than one, that is, a third variable capacitor, a fourth variable capacitor, or even more variable capacitors may also be included, and the positions of the variable capacitors are adjustable, that is, the positions of the variable capacitors in fig. 1 are only schematically illustrated and are not limited.
Optionally, in an application scenario of the present embodiment, the variable radiation unit 40 is a microstrip line disposed on the printed circuit board 80, and the resonance length of the variable radiation unit 40 is greater than a quarter wavelength of the uplink sub-band of the corresponding third frequency band, so that energy of the transmitted signal is relatively dispersed, and the SAR value can be effectively reduced.
Referring to fig. 3, in an application scenario of the present embodiment, the size of the ground plane 81 of the mobile terminal is 74mm × 50mm, the antenna clearance is 6mm, and the size of the printed circuit board 80 of the mobile terminal is 80mm × 50mm, in the application scenario, the variable radiating element 40 adjusts the operating states of the first variable capacitor 70 and the second variable capacitor 71 to achieve the adjustability of the resonant frequency in the range of 850MHz to 2600 MHz.
Optionally, in this application scenario, the first radiating element 10 is configured to provide resonance in a 900MHz frequency band, the second radiating element 20 is configured to provide resonance in a 2100MHz frequency band, and the third radiating element 30 is configured to provide resonance in a downlink sub-band in LTE B7.
In this application scenario, when the first variable capacitor 70 is 4.5pF and the second variable capacitor 71 is 6.5pF, that is, when the first variable capacitor 70 and the second variable capacitor operate 71 in the first operating state, the return loss curve of the whole antenna is as shown in fig. 4, the variable radiating element 40 provides a resonance in a 850MHz frequency band to supplement the resonance range of the first radiating element 10, that is, the resonance in a 900MHz frequency band is provided by the first radiating element 10, and the resonance in the 850MHz frequency band is provided by the variable radiating element 40.
In this application scenario, when the first variable capacitor 70 is 2.3pF and the second variable capacitor 71 is 8pF, that is, when the first variable capacitor 70 and the second variable capacitor 71 operate in the second operating state, the return loss curve of the whole antenna is as shown in fig. 5, the variable radiating element 40 provides resonance in the 1900MHz frequency band to supplement the resonance range of the second radiating element 20, that is, resonance in the 2100MHz frequency band is provided by the second radiating element 20, and resonance in the 1900MHz frequency band is provided by the variable radiating element 40.
In this application scenario, when the first variable capacitor 70 is 0.8pF and the second variable capacitor 71 is 8pF, that is, when the first variable capacitor 70 and the second variable capacitor 71 operate in the third operating state, the return loss curve of the entire antenna is as shown in fig. 6, and the variable radiating unit 40 provides the resonance of the uplink sub-band of the third frequency band, that is, the resonance of the uplink sub-band of LTE B7 is provided by the variable radiating unit 40.
It is understood that the sizes of the first variable capacitor 70 and the second variable capacitor 71 may also be adjusted to other values, that is, the first variable capacitor 70 and the second variable capacitor 71 may also be in other operating states, which is not limited herein, and as the sizes of the first variable capacitor 70 and the second variable capacitor 71 are changed, the return loss curve of the antenna is changed accordingly.
Referring to fig. 7, fig. 7 is a schematic structural diagram of an embodiment of a mobile terminal according to the present invention, where the mobile terminal 90 includes the antenna 91 in any one of the above embodiments, and a specific structure of the antenna 91 may refer to the above embodiments and is not described herein again.
The mobile terminal 90 may be a smart phone, a tablet computer, a digital assistant, a vehicle-mounted computer, and the like, which is not limited herein.
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 (9)
1. An antenna for a mobile terminal, comprising:
the first radiating unit comprises a main body part and a branch part extending from the main body part, wherein the main body part of the first radiating unit is connected with a printed circuit board of the mobile terminal through a feed sheet and is connected with a ground plane of the printed circuit board through a short-circuit sheet;
a second radiation unit for providing resonance in a second frequency band, the second radiation unit being connected to the main body portion of the first radiation unit;
a third radiating element, configured to provide resonance in a downlink sub-band of a third frequency band, and connected to the main body portion of the first radiating element;
the variable radiation unit is used for providing resonance of the uplink sub-band of the third frequency band and is connected to the feed sheet;
the variable radiating element is connected to the ground plane through a first variable capacitor and connected to the shorting strip through a second variable capacitor.
2. The antenna according to claim 1, wherein the variable radiating element is a microstrip line provided on the printed circuit board.
3. The antenna of claim 2, wherein the resonance length of the variable radiating element is greater than a quarter wavelength of the uplink sub-band of the third frequency band to which the variable radiating element corresponds.
4. The antenna of claim 3, wherein the variable radiating element is adjustable in resonant frequency in the range of 850MHz to 2600MHz by adjusting the operating states of the first variable capacitor and the second variable capacitor.
5. The antenna of claim 4, wherein the first radiating element is configured to provide resonance in a 900MHz band, the second radiating element is configured to provide resonance in a 2100MHz band, and the third radiating element is configured to provide resonance in a downlink sub-band in LTEB 7.
6. The antenna of claim 5, wherein when the first variable capacitor and the second variable capacitor operate in the first operating state, the variable radiating element provides 850MHz band resonance to supplement the resonance range of the first radiating element.
7. The antenna of claim 5, wherein when the first variable capacitor and the second variable capacitor operate in the second operating state, the variable radiating element provides a resonance in a 1900MHz band to supplement a resonance range of the second radiating element.
8. The antenna of claim 5, wherein when the first variable capacitor and the second variable capacitor operate in a third operating state, the variable radiating element provides resonance in an uplink sub-band of the third frequency band.
9. A mobile terminal, characterized in that it comprises an antenna according to any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710937441.8A CN107994345B (en) | 2017-10-10 | 2017-10-10 | Antenna of mobile terminal and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710937441.8A CN107994345B (en) | 2017-10-10 | 2017-10-10 | Antenna of mobile terminal and mobile terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107994345A CN107994345A (en) | 2018-05-04 |
| CN107994345B true CN107994345B (en) | 2020-11-13 |
Family
ID=62029776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710937441.8A Active CN107994345B (en) | 2017-10-10 | 2017-10-10 | Antenna of mobile terminal and mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107994345B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1409570A (en) * | 2001-09-14 | 2003-04-09 | 诺基亚有限公司 | Internal multiple frequency antenna with improved radiation effeciency |
| CN1423365A (en) * | 2001-12-07 | 2003-06-11 | 深圳市中兴通讯股份有限公司 | Mobile communication terminal built-in antenna |
| CN1682406A (en) * | 2002-09-12 | 2005-10-12 | 西门子公司 | Radio communications device with reduced specific absorption rate |
| CN102760952A (en) * | 2011-04-27 | 2012-10-31 | 深圳富泰宏精密工业有限公司 | Multi-frequency antenna |
| CN106785352A (en) * | 2016-12-30 | 2017-05-31 | 歌尔科技有限公司 | A kind of antenna for mobile phone and its mobile phone |
| CN107230825A (en) * | 2016-03-23 | 2017-10-03 | 联发科技股份有限公司 | The antenna and radio communication device of changeable radiation direction |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100597581B1 (en) * | 2004-11-05 | 2006-07-06 | 한국전자통신연구원 | Multi-band internal antenna of symmetry structure having stub |
| KR100964652B1 (en) * | 2007-05-03 | 2010-06-22 | 주식회사 이엠따블유 | Multi-band antenna and wireless communication device including the same |
| KR101309854B1 (en) * | 2010-09-21 | 2013-09-23 | 브로드콤 코포레이션 | Transmit power management for specific absorption rates |
| CN103367891A (en) * | 2013-05-10 | 2013-10-23 | 上海安费诺永亿通讯电子有限公司 | Reconfigurable low-SAR (specific absorption rate) value wireless terminal antenna and wireless terminal thereof |
| KR20160023281A (en) * | 2014-08-22 | 2016-03-03 | 삼성전자주식회사 | Multiband Antenna |
-
2017
- 2017-10-10 CN CN201710937441.8A patent/CN107994345B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1409570A (en) * | 2001-09-14 | 2003-04-09 | 诺基亚有限公司 | Internal multiple frequency antenna with improved radiation effeciency |
| CN1423365A (en) * | 2001-12-07 | 2003-06-11 | 深圳市中兴通讯股份有限公司 | Mobile communication terminal built-in antenna |
| CN1682406A (en) * | 2002-09-12 | 2005-10-12 | 西门子公司 | Radio communications device with reduced specific absorption rate |
| CN102760952A (en) * | 2011-04-27 | 2012-10-31 | 深圳富泰宏精密工业有限公司 | Multi-frequency antenna |
| CN107230825A (en) * | 2016-03-23 | 2017-10-03 | 联发科技股份有限公司 | The antenna and radio communication device of changeable radiation direction |
| CN106785352A (en) * | 2016-12-30 | 2017-05-31 | 歌尔科技有限公司 | A kind of antenna for mobile phone and its mobile phone |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107994345A (en) | 2018-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110892581B (en) | Antenna system and terminal equipment | |
| US9276320B2 (en) | Multi-band antenna | |
| CN103236583B (en) | A kind of novel LTE metal frame antenna strengthening bandwidth | |
| CN103117452B (en) | A kind of novel LTE terminal antenna | |
| CN103151601B (en) | A kind of bottom edge slot coupled antenna | |
| CN110085994B (en) | Adjustable antenna and terminal | |
| CN104037501B (en) | Mobile device | |
| CN103682572A (en) | Mobile device | |
| CN108023167A (en) | The radio communication device of antenna structure and the application antenna structure | |
| CN103682587A (en) | Mobile device | |
| US20120050112A1 (en) | Antenna designing method and data card single board of wireless terminal | |
| CN103078174A (en) | Multifrequency antenna device | |
| TWI446626B (en) | Wideband antenna for mobile communication | |
| EP3121899B1 (en) | Antenna apparatus and terminal | |
| CN104143694B (en) | Antenna structure and wireless communication device using same | |
| CN203367465U (en) | Novel ultra-wideband LTE antenna having metal frame | |
| CN104901015A (en) | Narrow-frame and multi-band coverage long term evaluation (LTE) antenna for mobile terminal | |
| CN105811088B (en) | Antenna device and mobile terminal | |
| CN105281014A (en) | Antenna and terminal | |
| CN105576352B (en) | A kind of antenna and terminal | |
| CN107994345B (en) | Antenna of mobile terminal and mobile terminal | |
| Chen et al. | Two-strip narrow-frame monopole antenna with a capacitor loaded for hepta-band smartphone applications | |
| TWI581508B (en) | Lte antenna sturcture | |
| CN201838714U (en) | Enclosed type multi-band antenna and wireless communication device of same | |
| KR101148366B1 (en) | Antenna for mobile communication terminals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |