CN105846053B - Portable unit - Google Patents
Portable unit Download PDFInfo
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- CN105846053B CN105846053B CN201510013862.2A CN201510013862A CN105846053B CN 105846053 B CN105846053 B CN 105846053B CN 201510013862 A CN201510013862 A CN 201510013862A CN 105846053 B CN105846053 B CN 105846053B
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Abstract
The invention discloses a kind of portable units, including an earth element and an antenna structure.The antenna structure includes: a ground branch, a feed-in branch, a low frequency radiation branch and a high frequency radiation branch.The feed-in branch is coupled to the earth element via the ground branch.The low frequency radiation branch is coupled to the feed-in branch.The high frequency radiation branch is coupled to the feed-in branch.The low frequency radiation branch has a serpentine structure, to reduce the specific absorption rate of the antenna structure.Serpentine structure may make hot spot electric current far from the edge of portable unit towards the internal stretch of portable unit, that is, allow at the current maxima point of low frequency radiation branch road further from human body.Therefore, antenna structure can be effectively reduced in a specific absorption rate of high frequency band, so that portable unit and antenna structure of the invention may conform to mandatory rule by serpentine structure.
Description
Technical field
The present invention relates to a kind of portable units, in particular to include a kind of portable unit with antenna structure.
Background technique
With the development of mobile communication technology, portable unit is more prevalent in recent years, it is common for example: hand-held computer,
The portable electronic apparatus of portable phone, multimedia player and other mixed functions.In order to meet the needs of people, just
Taking device usually has the function of wireless communication.Some cover the range for wireless communication of long range, such as: portable phone uses
2G, 3G, LTE (Long Term Evolution) system and its used 700MHz, 850MHz, 900MHz, 1800MHz,
The frequency band of 1900MHz, 2100MHz, 2300MHz and 2500MHz are communicated, and some then cover short-range wireless communication
Range, such as: Wi-Fi, Bluetooth system are communicated using the frequency band of 2.4GHz, 5.2GHz and 5.8GHz.
Antenna is element indispensable in the portable unit for support wireless communication function.For the electromagnetism for avoiding antenna from emitting
Wave generates adverse effect to human body, and decree in effect is all directed to specific absorption rate (the Specific Absorption of portable unit
Rate, SAR) it strictly regulates.How the antenna element taking into account communication quality and meet regulation is designed, it has also become designs now
A major challenge of person.
Summary of the invention
In order to solve the above technical problems, in the preferred embodiment, the present invention provides a kind of portable unit, comprising: a ground connection
Element；An and antenna structure a, comprising: ground branch；One feed-in branch has a load point, and wherein the feed-in branch passes through
The earth element is coupled to by the ground branch；One low frequency radiation branch is coupled to the feed-in branch；An and high frequency radiation branch
Road is coupled to the feed-in branch；Wherein the low frequency radiation branch has a serpentine structure.
In some embodiments, the serpentine structure for reducing the antenna structure a specific absorption rate.
In some embodiments, a current maxima point of the low frequency radiation branch is located in the serpentine structure.
In some embodiments, the antenna structure is adjacent to an edge of the portable unit, and the serpentine structure is towards remote
Make to extend in the direction at the edge from the portable unit.
In some embodiments, which makees to extend towards the direction close to the ground branch.
In some embodiments, which is in a U-shaped, a W font, a N font, a S font or a zigzag
Any one or the combination of several of them.
In some embodiments, a first end of the feed-in branch is coupled to the earth element via the ground branch, should
One first end of low frequency radiation branch is coupled to a second end of the feed-in branch, and a second end of the low frequency radiation branch is one
Open end, a first end of the high frequency radiation branch are coupled to the second end of the feed-in branch, and the high frequency radiation branch
A second end be an open end.
In some embodiments, the second end of the second end of the low frequency radiation branch and the high frequency radiation branch is towards phase
Opposite direction work extends.
In some embodiments, the portable unit further include: a display, wherein the antenna structure between the display and
Between one edge of the portable unit.
In some embodiments, the feed-in branch and low frequency radiation branch excitation generate a low-frequency band, the feed-in branch
Road and high frequency radiation branch excitation generate a high frequency band, which between 2484MHz, and is somebody's turn to do between 2400MHz
High frequency band is between 5150MHz between 5850MHz.
Portable unit in the present invention, since its low frequency radiation branch has a serpentine structure, to reduce antenna structure
Specific absorption rate.Serpentine structure may make hot spot electric current far from the edge of portable unit, that is, to allow towards the internal stretch of portable unit
Further from human body at the current maxima point of low frequency radiation branch road.Therefore, antenna can be effectively reduced by serpentine structure
Structure is in a specific absorption rate of high frequency band, so that portable unit and antenna structure of the invention may conform to mandatory rule.
Detailed description of the invention
Fig. 1 is the schematic diagram for showing portable unit described in an embodiment according to the present invention；
Fig. 2 is the schematic diagram for showing antenna structure described in an embodiment according to the present invention；
Fig. 3 is the schematic diagram for showing antenna structure described in another embodiment according to the present invention；
Fig. 4 is the schematic diagram for showing the specific absorption rate of antenna structure described in an embodiment according to the present invention and measuring.
Description of symbols:
100~portable unit；
101, the 102, edge of 103~portable unit；
110~earth element；
120~display；
200,300~antenna structure
220~ground branch；
The first end of 221~ground branch；
The second end of 222~ground branch；
230~feed-in branch；
The first end of 231~feed-in branch；
The second end of 232~feed-in branch；
240,340~low frequency radiation branch；
241, the first end of 341~low frequency radiation branch；
242, the second end of 342~low frequency radiation branch；
250~high frequency radiation branch；
The first end of 251~high frequency radiation branch；
The second end of 252~high frequency radiation branch；
260,360~serpentine structure；
290~signal source；
FP~load point.
Specific embodiment
For objects, features and advantages of the present invention can be clearer and more comprehensible, specific embodiments of the present invention are cited below particularly out,
And cooperate Detailed description of the invention book attached drawing, it is described in detail below.
Fig. 1 is the schematic diagram for showing portable unit 100 described in an embodiment according to the present invention.Portable unit 100 can be with
It is an intelligent smart phone (Smart Phone), a tablet computer (Tablet Computer) or a laptop
(Notebook Computer).As shown in Figure 1, portable unit 100 includes an earth element 110, an antenna structure 200, and
One display 120.Earth element 110 can be a metal flat, may be disposed at a printed circuit board (Printed
Circuit Board, PCB) on.Antenna structure 200 can be made of metal, such as: copper, silver, aluminium, iron or its alloy.It
Cable architecture 200 is between display 120 and an edge 101 of portable unit 100.Display 120 can be any kind
Electronic display unit, such as: a LCD screen (Liquid Crystal Display) or an organic electro-luminescent display
(Organic Electroluminesence Display, OLED).In the embodiment in figure 1, antenna structure 200 is located at portable
The top of device 100, and the present invention is not limited to this.In other embodiments, antenna structure 200 can be changed to be located at portable dress
100 side is set, for example, can be between display 120 and the other edge 102 (or edge 103) of portable unit 100.It must
It will be understood that portable unit 100 may also include other elements, and such as: a processor, a loudspeaker, a battery, a touch-control mould
Block, an acoustic control module or a shell (not shown).
Fig. 2 is the schematic diagram for showing antenna structure 200 described in an embodiment according to the present invention.Fig. 2 is for explanatory diagram 1
The detailed features of antenna structure 200.As shown in Fig. 2, antenna structure 200 include: a ground branch 220, a feed-in branch 230,
One low frequency radiation branch 240 and a high frequency radiation branch 250.The above branch is all made with metal, such as: copper, silver, aluminium,
Iron or its alloy.Feed-in branch 230 has a load point FP, and feed-in branch 230 is coupled to ground connection via ground branch 220
Element 110.Low frequency radiation branch 240 and high frequency radiation branch 250 are all coupled to feed-in branch 230, low frequency radiation branch 240
The length of length higher-frequency radiation branch 250 is longer.
Ground branch 220 can a substantially L-shaped.Feed-in branch 230 can a substantially vertical bar shaped.Low frequency radiation branch
240 can have a serpentine structure 260.High frequency radiation branch 250 can a substantially vertical bar shaped.Load point FP is located at feed-in branch
In 230 first end 231.Load point FP can be coupled to one via a coaxial wire (Coaxial Cable) (not shown)
Signal source 290.Signal source 290 can be a radio frequency (Radio Frequency, RF) module, be used for excitation antenna structure
200.The first end 231 of feed-in branch 230 is coupled to a first end 221 of ground branch 220, and the 1 of ground branch 220
Two ends 222 are coupled to earth element 110.One first end 241 of low frequency radiation branch 240 is coupled to the one of feed-in branch 230
Two ends 232, and a second end 242 of low frequency radiation branch 240 is an open end (Open End).High frequency radiation branch 250
One first end 251 is coupled to the second end 232 of feed-in branch 230, and a second end 252 of high frequency radiation branch 250 is opened for one
Terminal.The second end 242 of low frequency radiation branch 240 and the second end 252 of high frequency radiation branch 250 can be made to prolong in the opposite direction
It stretches.
Antenna structure 200 is at the edge of portable unit 100 101.In antenna structure 200, low frequency radiation branch
Make to extend in the direction at 240 serpentine structure 260 towards the edge 101 far from portable unit 100.In other words, serpentine structure 260 is towards leaning on
Make to extend in the direction of proximity ground leg 220.The substantially U-shaped of serpentine structure 260.In other embodiments, serpentine structure 260
Also there can be other shapes, such as: a N font, a S font or a zigzag.
Please also refer to the 1st, 2 figures.The operating principle of antenna structure 200 can be as what follows.Feed-in branch 230 and low frequency
Radiation branch 240 can excite jointly generates a low-frequency band, and feed-in branch 230 and high frequency radiation branch 250 can excite jointly
Generate a high frequency band.The total length of feed-in branch 230 and low frequency radiation branch 240 may approximately equal to a quarter of low-frequency band
Wavelength.The total length of feed-in branch 230 and high frequency radiation branch 250 may approximately equal to the quarter-wave of high frequency band.Citing
For, aforementioned lower frequency frequency band can be between 2400MHz between 2484MHz, and aforementioned high frequency band can be between 5150MHz extremely
Between 5850MHz.Therefore, portable unit 100 and antenna structure 200 can at least support the mobile communication such as Wi-Fi and Bluetooth
Operational frequency bands.
It must be noted that, due to there is frequency-doubled effect, feed-in branch 230 and low frequency radiation branch 240 but will excite generation
Another high order resonance mode in aforementioned high frequency band (such as: 5GHz frequency band).This high order resonance mode is to cause tradition
Planar inverted F-antenna (Planar Inverted F Antenna, PIFA) is in the specific absorption rate (Specific of high frequency band
Absorption Rate, SAR) the main reason for mandatory rule can not be met.Increase in the present invention on low frequency radiation branch 240
Add a serpentine structure 260 designed for overcoming prior art problem encountered.In the preferred embodiment, low frequency radiation branch
A 240 current maxima point (Current Maximum Point) is located exactly in serpentine structure 260, and times of the electric current
Frequency is fallen near 5G.More specifically, between 260 two positions of serpentine structure by load point FP tremendously low frequency radiation branch 240
One resonance path, length may approximately equal to aforementioned lower frequency frequency band 1/8th wavelength or aforementioned high frequency band four/
One wavelength.Because can make current direction on the contrary in serpentine structure 260 and then offset each other, current strength and radiation field intensity are reduced,
Therefore aforementioned high order resonance mode is reduced for negative effect brought by specific absorption rate.On the other hand, 260 court of serpentine structure
The internal stretch of portable unit 100, this also may make edge 101 of the hot spot electric current far from portable unit 100, that is, allow low frequency radiation
Further from human body at current maxima point on branch 240.Therefore, serpentine structure 260 can be effectively reduced antenna structure 200
In a specific absorption rate of high frequency band, so portable unit 100 and antenna structure 200 of the invention may conform to mandatory rule.
The serpentine structure be a U-shaped, a W font, a N font, a S font or a zigzag in any one or it is several
The combination of kind.Fig. 3 is the schematic diagram for showing antenna structure 300 described in another embodiment according to the present invention.Fig. 3 is similar with Fig. 2,
The difference of the two is that a low frequency radiation branch 340 of antenna structure 300 has a serpentine structure 360, substantially a W word
Shape.Wantonly two adjacent parallel legs of serpentine structure 360, its spacing may approximately equal to 0.5mm.In addition, in order to save design space,
The width of serpentine structure 360 can be thinner compared with the width of the rest part of low frequency radiation branch 340.The antenna structure 300 of Fig. 3
Remaining feature is all identical as the antenna structure of Fig. 2 200, so similar operating effect can be achieved in two embodiments.
Fig. 4 is the schematic diagram for showing the specific absorption rate of antenna structure 300 described in an embodiment according to the present invention and measuring.
Fig. 4 is used to illustrate by the practical result for measuring specific absorption rate in the top of portable unit 100 and bottom.Please also refer to Fig. 4 and
Following table one.
| The specific absorption rate of top | The specific absorption rate of bottom | |
| Conventional planar inverted F shaped antenna | 2.38 | 2.52 |
| Antenna system of the invention | 1.51 | 2.79 |
Table one: the specific absorption rate actually measured (when antenna gain being taken to be all -2.95dBi)
Table one is the comparison sheet of the specific absorption rate actually measured.According to measurement it is found that with the reversed F-typed day of conventional planar
Line is compared, the same antenna gain the case where (such as: be all -2.95dBi) under, specific absorption rate measured by the present invention can be shown
Land reduction, and especially top specific absorption rate is up to sixty percent or so of traditional design, and therefore, antenna system of the invention will more
Readily conform to legal specific absorption rate specification.
It is worth noting that, it is limit of the invention that above-described component size, component shape and frequency range are all non-
Condition processed.Antenna designers can need to adjust these setting values according to different.Portable unit and antenna structure of the invention is simultaneously
It is not limited only to state shown in Fig. 1-4.The present invention can only include any one or more of one or more any embodiments of Fig. 1-4
Item feature.In other words, and the feature of not all diagram must be implemented on simultaneously in portable unit and antenna structure of the invention.
Ordinal number in this specification and claim, such as " first ", " second ", " third " etc., each other
There is no precedence relationships sequentially, are only used for mark and distinguish two different elements with same name.
Though the present invention is disclosed as above with preferred embodiment, the range that however, it is not to limit the invention, any this field
Technical staff, without departing from the spirit and scope of the present invention, when a little variation and retouching, therefore protection of the invention can be done
Range is when as defined in claim.
Claims (8)
1. a kind of portable unit characterized by comprising
One earth element；And
One antenna structure, comprising:
One ground branch；
One feed-in branch has a load point, and wherein the feed-in branch is coupled to the earth element via the ground branch；
One low frequency radiation branch is coupled to the feed-in branch；And
One high frequency radiation branch is coupled to the feed-in branch；
Wherein the low frequency radiation branch has a serpentine structure；
Wherein the feed-in branch and low frequency radiation branch excitation generate a low-frequency band, the feed-in branch and the high frequency radiation branch
Road excitation generates a high frequency band, the low-frequency band between 2400MHz between 2484MHz, and the high frequency band between
5150MHz is between 5850MHz；
Wherein the total length of the feed-in branch and the low frequency radiation branch is equal to the quarter-wave of the low-frequency band, and the feedback
Enter the quarter-wave that branch is equal to the high frequency band with the total length of the high frequency radiation branch；
Wherein the serpentine structure is a W font, and the spacing of wantonly two adjacent parallel legs of the serpentine structure is equal to 0.5mm.
2. portable unit as described in claim 1, wherein the serpentine structure for reducing the antenna structure a specific absorption
Rate.
3. portable unit as described in claim 1, wherein a current maxima point of the low frequency radiation branch wriggles positioned at this
In structure.
4. portable unit as described in claim 1, wherein the antenna structure is adjacent to an edge of the portable unit, and is somebody's turn to do
Make to extend in the direction at serpentine structure towards the edge far from the portable unit.
5. portable unit as described in claim 1, wherein the serpentine structure is made to extend towards the direction close to the ground branch.
6. portable unit as described in claim 1, wherein a first end of the feed-in branch is coupled to via the ground branch
One first end of the earth element, the low frequency radiation branch is coupled to a second end of the feed-in branch, the low frequency radiation branch
A second end be an open end, a first end of the high frequency radiation branch is coupled to the second end of the feed-in branch, and is somebody's turn to do
One second end of high frequency radiation branch is an open end.
7. portable unit as claimed in claim 6, the wherein second end of the low frequency radiation branch and the high frequency radiation branch
The second end make to extend in the opposite direction.
8. portable unit as described in claim 1, further includes:
One display, wherein the antenna structure is between the display and an edge of the portable unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510013862.2A CN105846053B (en) | 2015-01-12 | 2015-01-12 | Portable unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510013862.2A CN105846053B (en) | 2015-01-12 | 2015-01-12 | Portable unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105846053A CN105846053A (en) | 2016-08-10 |
| CN105846053B true CN105846053B (en) | 2019-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510013862.2A Active CN105846053B (en) | 2015-01-12 | 2015-01-12 | Portable unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105846053B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799874A (en) * | 2016-08-30 | 2018-03-13 | 宇龙计算机通信科技(深圳)有限公司 | Antenna and mobile terminal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1909283A (en) * | 2005-08-04 | 2007-02-07 | 三星电子株式会社 | Antenna apparatus for portable terminal |
| US7450076B1 (en) * | 2007-06-28 | 2008-11-11 | Cheng Uei Precision Industry Co., Ltd. | Integrated multi-band antenna |
| US7646349B2 (en) * | 2006-12-28 | 2010-01-12 | Samsung Electronics Co., Ltd. | Mobile terminal for reducing specific absorption rate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090124215A1 (en) * | 2007-09-04 | 2009-05-14 | Sierra Wireless, Inc. | Antenna Configurations for Compact Device Wireless Communication |
| TWI347034B (en) * | 2007-11-21 | 2011-08-11 | Arcadyan Technology Corp | Dual-band antenna |
-
2015
- 2015-01-12 CN CN201510013862.2A patent/CN105846053B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1909283A (en) * | 2005-08-04 | 2007-02-07 | 三星电子株式会社 | Antenna apparatus for portable terminal |
| US7646349B2 (en) * | 2006-12-28 | 2010-01-12 | Samsung Electronics Co., Ltd. | Mobile terminal for reducing specific absorption rate |
| US7450076B1 (en) * | 2007-06-28 | 2008-11-11 | Cheng Uei Precision Industry Co., Ltd. | Integrated multi-band antenna |
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| Publication number | Publication date |
|---|---|
| CN105846053A (en) | 2016-08-10 |
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