CN104953255B - A kind of smart antenna available for handheld device - Google Patents
A kind of smart antenna available for handheld device Download PDFInfo
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- CN104953255B CN104953255B CN201510226653.6A CN201510226653A CN104953255B CN 104953255 B CN104953255 B CN 104953255B CN 201510226653 A CN201510226653 A CN 201510226653A CN 104953255 B CN104953255 B CN 104953255B
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- 239000000758 substrate Substances 0.000 claims abstract description 59
- 230000005855 radiation Effects 0.000 claims abstract description 49
- 239000002184 metal Substances 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000005284 excitation Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
Abstract
The invention discloses a kind of smart antenna available for handheld device, it includes：A kind of metal radiation paster of planar inverted-F antenna, metal ground plane, medium substrate, feeding network, two piece-root grafting ground short circuit posts and a feed conductive pole；The metal radiation paster is arranged on the first surface and second surface of small medium substrate；Metal ground plane is arranged on first surface, second surface and the surrounding of the first big medium substrate；Feeding network is arranged on the second surface of second largest medium substrate；Medium substrate includes the big medium substrate required for the small medium substrate and metal ground plane and feeding network of support metal radiation paster.A kind of smart antenna available for handheld device provided by the invention, compact-sized, size meets miniature requirement, and the radiation direction of aerial array can be made to deflect to specified position.
Description
Technical field
The invention belongs to hand-held terminal device field, is related to a kind of new smart antenna, the antenna element frequency coverage
GSM900 and the frequency ranges of PCS 1900, the function of deflection radiation direction can be realized.
Background technology
Recently as increasing sharply for Internet user, the broadband access demand of residential and business customer substantially increases,
So as to promote the development of access technology and network and raising.Cable and DSL (digital subscriber line) account in bandwidth access market
There is very big share, the transmission problem that can preferably solve " last one kilometer " between Internet service provider and end user.It is wide
Broad-band wireless access (BWA) technology is also becoming increasingly popular as the third access technology.Compared with traditional cable and telephone wire,
BWA systems are easily installed, and data transmission efficiency is high, and maintenance cost is low, easily scalable etc..Typical broadband access system passes through receipts
Hair base station (BTS) is communicated with subscriber terminal equipment (CPE).Although wireless access has many good qualities, challenge
It is more.Such as spectrum efficiency problems, network scalability issues, CPE Antenna Design problems, the integrity problem of non-line-of-sight scope,
Intersymbol interference problem caused by multipath effect (influence speech quality), co-channel interference caused by channeling (influence the appearance of system
Amount) etc..The effective scheme for solving these problems is to use smart antenna.
The array that smart antenna is made up of multiple antenna elements, the master of the phase antenna by controlling antenna element
User direction is specified in wave beam alignment, and secondary lobe and zero point are directed at interference source direction, reaches the capacity for improving wireless system, covers model
Enclose and efficiency of transmission.In second and third generation wireless communication system, smart antenna is only as subsidiary function.In order to sufficiently utilize
Frequency spectrum, cost of arranging net is reduced, is improved service quality, is realized restructural, sane across a network operation, set in wireless system of future generation
Smart antenna is preferably used in meter.
It is proposed that phased array smart antenna, this is around one by 6 dipoles (parasitic element) for being not added with excitation
The array of individual plus excitation dipole (exciting unit) composition.It is not added with 6 below the dipole of excitation, connects tunable capacitor.It is logical
Specific antenna pattern is crossed, antenna and port current is calculated, each tunable capacitor is obtained using preferred univariant search method
Value, by the coupling of parasitic element and exciting unit, reaching makes antenna pattern turn to assigned direction.But due to idol
The limitation of extremely sub- size, it is impossible to make its model be used for modern handheld device, such as mobile phone etc..Someone is set using ESPAR antennas
Smart antenna is counted, although antenna pattern can be deflected, its size can not be adapted in the handheld device of modern communicationses.Someone
Utilize inverse-F antenna and inverted l antenna design smart antenna, although its size can apply to handheld device, its yawing moment
The DeGrain of figure, and radiation direction its gain after deflecting does not increase.
Above-mentioned various smart antennas all cannot be used in modern handsets, it is impossible to improve the experience of user.Therefore, grind
The design for studying carefully the novel intelligent antenna for being applied to handheld device is to be highly desirable and have certain practical significance.
The content of the invention
The present invention provides a kind of design of the smart antenna for the radiation direction deviation ad-hoc location that can make antenna, antenna work
Make in GSM 900 and the frequency ranges of PCS 1900, while radiation direction is deflected, additionally it is possible to improve gain.
The present invention adopts the following technical scheme that：
A kind of smart antenna available for handheld device, including 4 pieces in conplane small medium substrate, overlap
The first big medium substrate and second largest medium substrate, and big medium substrate is parallel to small medium substrate, the first big medium substrate
With both small medium substrates at a distance of 4mm；
The metal radiation paster of planar inverted-F antenna is provided with small medium substrate, metal ground plane is arranged on first big Jie
The first surface and second surface of matter substrate and 4 faces of surrounding；Feeding network is arranged on the second surface of second medium substrate；
Each small medium substrate is provided with two piece-root grafting ground short circuit posts (PB, PC) and a feed conductive pole (PA)；Two piece-root grafting ground short circuit posts
The one end of (PB, PC) is connected with the first surface of the first big medium substrate, and the other end passes through small medium substrate, is pasted with metal radiation
The first surface connection of piece；One end of a piece feed conductive pole (PA) is through the first big medium substrate and second largest medium substrate the
The microstrip transmission line on two surfaces is that feeding network is connected, first surface of the other end through small medium substrate and metal radiation paster
Connection；
The metal radiation paster of the planar inverted-F antenna is divided into two parts, is arranged on the first surface of small medium substrate
On second surface；Part I is located at the first surface of small medium substrate, and each metal radiation paster is polygon, divides 5
Individual branch road (branch road A, branch road B, branch road C, branch road D, branch road E) structure；Branch road A and branch road B length meets the ripple of low frequency part 1/4
Long length, branch road A length is 58mm, and branch road B length is 49mm；Branch road C and branch road E length meet HFS 1/
The length of 4 wavelength, branch road C length is 12mm, and branch road E length is 18mm；Part II is located at the second of small medium substrate
Surface, it is a width of 36mm × 20mm one long rectangular strap glue copper sheet；
The metal radiation paster of 4 described planar inverted-F antennas is arranged in four angles of big medium substrate by Central Symmetry
Fall；Entirely length × wide size of aerial array is：140mm×80mm.
The impedance matching of metal radiation paster by small medium substrate second surface band glue copper sheet complete, working frequency range by
The length of 4 branch roads (branch road A, branch road B, branch road C, branch road E) of the first surface of small medium substrate determines.
The overall dimensions of metal radiation paster are less than 1/4 wavelength for meeting low-limit frequency requirement, and low-limit frequency wavelength is
348mm。
First surface, second surface and the surrounding of first big medium substrate all apply copper so that the first big medium substrate
First surface be electrically connected with second surface, turn into same piece of land.
Described feeding network uses 1/4 impedance transformer, and length is 1/4 operation wavelength so that the side of smart antenna array
Edge impedance is reached with the ohmage of modular connection 50 to be matched.
Beneficial effect
The present invention devises a smart antenna for being applied to handheld device, is operated in GSM 900 and the frequency ranges of PCS 1900.
In the frequency ranges of GSM 900,920MHz is selected；In the frequency ranges of PCS 1900,1960MHz design smart antennas are selected.Wherein in 920MHz
When, the gain of antenna element is -1.56dBi, and in 1960MHz, the gain of antenna element is 0.96dBi.Deflect radiation direction
Afterwards, low-frequency gain can increase 3.35dBi, and high-frequency gain is minimum can to increase 0.99dBi.And the effect of deflection is fine.
Brief description of the drawings
Fig. 1 is the small medium baseplate structure schematic diagram of the present invention.
Fig. 2 is schematic structural view of the invention.
Fig. 3 is the return loss plot of the actual measurement and emulation of the present invention.
Fig. 4 is the feeding network that the present invention deflects into z-axis positive direction in 920MHz radiation directions.
Fig. 5 is the feeding network that the present invention deflects into x-axis positive direction in 1960MHz radiation directions.
Fig. 6 is the feeding network that the present invention deflects into y-axis positive direction in 1960MHz radiation directions.
Fig. 7 is the feeding network that the present invention deflects into z-axis positive direction in 1960MHz radiation directions.
Fig. 8 is actual measurement and the analogous diagram that the present invention deflects into the antenna pattern of z-axis positive direction in 920MHz radiation directions.
Fig. 9 is the actual measurement and emulation that the present invention deflects into the antenna pattern of x-axis positive direction in 1960MHz radiation directions
Figure.
Figure 10 is the actual measurement and emulation that the present invention deflects into the antenna pattern of y-axis positive direction in 1960MHz radiation directions
Figure.
Figure 11 is the actual measurement and emulation that the present invention deflects into the antenna pattern of z-axis positive direction in 1960MHz radiation directions
Figure.
Embodiment
Referring to Fig. 1 (a) and Fig. 1 (b), the radiation mechanism of microstrip antenna is illustrated.It can see from Fig. 1 (a), it is whole
Individual antenna element is made up of 5 branch roads, wherein branch road A and branch road B control low frequency parts, because the frequency ranges of GSM 900 compare
Width, simple single inverse-F antenna can not meet this requirement, then form a complete satisfaction using using two bandwidth
The requirement of special frequency channel, branch road C and the frequency ranges of branch road E control high frequencies PCS 1900 are covered, principle is as low-frequency range.It should be noted
, branch road A, B, C, E length setting are about 1/4 medium wavelength.Fig. 1 (b) is the second table of the small medium substrate of antenna element
Face, effect are to reach matching in specific frequency range by current coupling antenna.PA points are distributing points, and PB, PC are that ground connection is short
Waypoint.By branch road, compatible portion and the interaction of short-circuit post, the working frequency range of the antenna element required for obtaining.
Table 1 is the metal radiation patch parameters of planar inverted-F antenna of the present invention, is the detailed of individual antenna unit various pieces
Size.
| Parameter | L1 | L2 | L3 | L4 | L5 |
| Numerical value | 40mm | 33mm | 12mm | 6mm | 18mm |
| Parameter | L6 | L7 | w1 | w2 | w3 |
| Numerical value | 36mm | 4mm | 20mm | 18mm | 16mm |
| Parameter | w4 | w5 | w6 | w7 | w8 |
| Numerical value | 3mm | 5mm | 4mm | 1mm | 1mm |
| Parameter | w9 | w10 | w11 | ||
| Numerical value | 2mm | 1mm | 2mm |
Fig. 2 is schematic structural view of the invention.Wherein Fig. 2 (a) is top view, and Fig. 2 (b) is front view, and Fig. 2 (c) is left/right
View.These three figures indicate structure the formation mode and the specific size of aerial array from different directions.
As seen from Figure 2, the present invention uses two pieces of an equal amount of medium substrates, and the first big medium substrate is as support
Effect, second largest medium substrate are used for designing feeding network.In the first surface of the first big medium substrate, second surface and four
All all deposited copper so that the first surface and second surface of the first big medium substrate are in the state on same ground, meet inverted f day
The ground short circuit post and feed conductive pole of line are connected to the requirement of same ground.
Fig. 3 is the return loss plot of antenna element, and return loss is to represent the parameter of signal reflex performance, and it refers in light
Fine junction, the decibels of the ratio of the relative input light of back reflected laser (the scattering light successively transmitted to input), is returned
Ripple loss is bigger better, to reduce influence of the reflected light to light source and system.Usually require that reflection power is as small as possible, thus
There are more power to be sent to load.In the design, require that return loss is less than -5dB for low frequency part, HFS
Return loss is less than -10dB.
Fig. 4-7 is the schematic diagram of feeding network, and the design uses parallelly feeding, and parallelly feeding is to use each antenna element
Microstrip transmission line is together in parallel, and for the transmission line of feed, each antenna element is equivalent to a multiport network.One
As for, the edge impedance of microstrip antenna does not simultaneously meet general 50 ohm of microwave device, at this moment just needs to convert using impedance
Device.Amplitude and phase according to needed for each antenna port, using the width of different impedance variations device, wherein impedance transformer
The amplitude distribution of final feeding network is determined, the length of impedance transformer determines the phase distribution of feeding network.
Fig. 8-11 is the antenna pattern of smart antenna all directions.Fig. 8 is that antenna deflects into z in 920MHz radiation directions
The actual measurement of the antenna pattern of axle positive direction and analogous diagram.In 920MHz, the gain size of individual antenna is -1.56dBi, makes day
The maximum gain that the radiation direction of linear array deflects into z-axis positive direction is 1.79dBi, it can be seen that aerial array
Radiation direction is deflected to z-axis positive direction.Fig. 9 is the radiation direction that antenna deflects into x-axis positive direction in 1960MHz radiation directions
The actual measurement of figure and analogous diagram.In 1960MHz, the gain size of individual antenna is 0.96dBi, makes the radiation direction of aerial array inclined
The maximum gain for going to x-axis positive direction is 1.95dBi, it can be seen that the radiation direction of aerial array is deflected to x-axis
Positive direction.Figure 10 is actual measurement and the analogous diagram for the antenna pattern that antenna deflects into y-axis positive direction in 1960MHz radiation directions.
In 1960MHz, making the radiation direction of aerial array, to deflect into the maximum gain of y-axis positive direction be 3.25dBi, can from figure
Go out, the radiation direction of aerial array is deflected to y-axis positive direction.Figure 11 is that antenna is deflecting into z-axis just in 1960MHz radiation directions
The actual measurement of the antenna pattern in direction and analogous diagram.In 1960MHz, the radiation direction of aerial array is set to deflect into z-axis positive direction
Maximum gain be 3.34dBi, it can be seen that the radiation direction of aerial array is deflected to z-axis positive direction.
This it appears that the design can make the radiation direction of aerial array deflect into the position specified from figure, and
Positive effect.
Claims (5)
- A kind of 1. smart antenna for handheld device, it is characterised in that：Including 4 pieces in conplane small medium substrate, The the first big medium substrate overlapped and second largest medium substrate, and big medium substrate is big parallel to small medium substrate, first Both medium substrate and small medium substrate are at a distance of 4mm；The metal radiation paster of planar inverted-F antenna is provided with small medium substrate, metal ground plane is arranged on the first big medium base The first surface and second surface of plate and 4 faces of surrounding；Feeding network is arranged on the second surface of second largest medium substrate；Often Individual small medium substrate is provided with two piece-root grafting ground short circuit posts (PB, PC) and a feed conductive pole (PA)；Two piece-root grafting ground short circuit posts The one end of (PB, PC) is connected with the first surface of the first big medium substrate, and the other end passes through small medium substrate, is pasted with metal radiation The first surface connection of piece；One end of a piece feed conductive pole (PA) is through the first big medium substrate and second largest medium substrate the The microstrip transmission line on two surfaces is that feeding network is connected, first surface of the other end through small medium substrate and metal radiation paster Connection；The metal radiation paster of the planar inverted-F antenna is divided into two parts, is arranged on the first surface and of small medium substrate On two surfaces；Part I is located at the first surface of small medium substrate, and each metal radiation paster is polygon, point 5 branch Road is tie point, the second branch road, the 3rd branch road, the 4th branch road, the 5th branch structure；Tie point and the length of the second branch road Meet the length of the wavelength of low frequency part 1/4, the length of tie point is 58mm, and the length of the second branch road is 49mm；3rd branch road Meet the length of the wavelength of HFS 1/4 with the length of the 5th branch road, the length of the 3rd branch road is 12mm, the length of the 5th branch road For 18mm；Part II is located at the second surface of small medium substrate, is a width of 36mm × 20mm one long rectangular strap glue copper Skin；The metal radiation paster of 4 described planar inverted-F antennas is arranged in four corners of big medium substrate by Central Symmetry；It is whole The length of individual aerial array × wide size is：140mm×80mm.
- 2. smart antenna according to claim 1, it is characterised in that：The impedance matching of metal radiation paster is by small medium base The band glue copper sheet of the second surface of plate is completed, working frequency range by small medium substrate first surface 4 branch road tie points, the Two branch roads, the 3rd branch road, the length of the 5th branch road determine.
- 3. smart antenna according to claim 2, it is characterised in that：The overall dimensions of metal radiation paster, which are less than, to be met most 1/4 wavelength of low frequency requirement, low-limit frequency wavelength is 348mm.
- 4. smart antenna according to claim 3, it is characterised in that：First surface, the second table of first big medium substrate Face and surrounding all apply copper so that the first surface of the first big medium substrate is electrically being connected with second surface, turns into same Plot.
- 5. smart antenna according to claim 1, it is characterised in that：Described feeding network uses 1/4 impedance transformer, Length is 1/4 operation wavelength so that the edge impedance of smart antenna array is reached with the ohmage of modular connection 50 to be matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510226653.6A CN104953255B (en) | 2015-05-06 | 2015-05-06 | A kind of smart antenna available for handheld device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510226653.6A CN104953255B (en) | 2015-05-06 | 2015-05-06 | A kind of smart antenna available for handheld device |
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| CN104953255A CN104953255A (en) | 2015-09-30 |
| CN104953255B true CN104953255B (en) | 2017-11-14 |
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| CN201510226653.6A Expired - Fee Related CN104953255B (en) | 2015-05-06 | 2015-05-06 | A kind of smart antenna available for handheld device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591189B (en) * | 2015-12-03 | 2019-06-07 | 深圳市天鼎微波科技有限公司 | The antenna for mobile phone of low SAR value |
| CN108511890A (en) * | 2018-02-06 | 2018-09-07 | 深圳市摩尔环宇通信技术有限公司 | A kind of 5G multi-band mobile phone antennas |
| CN111937233B (en) * | 2018-03-30 | 2022-04-19 | 株式会社村田制作所 | Antenna module and communication device equipped with same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101273493A (en) * | 2005-09-29 | 2008-09-24 | 索尼爱立信移动通讯股份有限公司 | Multi-band PIFA |
| CN102782936A (en) * | 2010-03-05 | 2012-11-14 | 捷讯研究有限公司 | Diversity antenna system comprising meander pattern antennas |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM378495U (en) * | 2009-10-23 | 2010-04-11 | Unictron Technologies Corp | Miniature multi-frequency antenna |
| US9147932B2 (en) * | 2012-10-08 | 2015-09-29 | Apple Inc. | Tunable multiband antenna with dielectric carrier |
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2015
- 2015-05-06 CN CN201510226653.6A patent/CN104953255B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101273493A (en) * | 2005-09-29 | 2008-09-24 | 索尼爱立信移动通讯股份有限公司 | Multi-band PIFA |
| CN102782936A (en) * | 2010-03-05 | 2012-11-14 | 捷讯研究有限公司 | Diversity antenna system comprising meander pattern antennas |
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