CN104953255A - Intelligent antenna applicable to handheld equipment - Google Patents
Intelligent antenna applicable to handheld equipment Download PDFInfo
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- CN104953255A CN104953255A CN201510226653.6A CN201510226653A CN104953255A CN 104953255 A CN104953255 A CN 104953255A CN 201510226653 A CN201510226653 A CN 201510226653A CN 104953255 A CN104953255 A CN 104953255A
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- 239000000758 substrate Substances 0.000 claims abstract description 61
- 230000005855 radiation Effects 0.000 claims abstract description 48
- 239000002184 metal Substances 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 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
- 238000010586 diagram Methods 0.000 description 11
- 238000013461 design Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000004891 communication 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
- 238000011161 development Methods 0.000 description 1
- 239000000835 fiber Substances 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
- 230000011514 reflex Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The invention discloses an intelligent antenna applicable to handheld equipment. The intelligent antenna comprises metal radiation patches of a planar inverted-F antenna, metal ground planes, dielectric substrates, a feed network, two grounding short circuit poles and one feeding electric conduction pole, wherein the metal radiation patches are arranged on the first surface and the second surface of small dielectric substrates; the metal ground planes are arranged on the first surface, the second surface and the periphery of a first large dielectric substrate; the feeding network is arranged on the second surface of a second large dielectric substrate; the dielectric substrates include the small dielectric substrates used for supporting the metal radiation patches and the large dielectric substrates needed by the metal ground planes and the feeding network. The intelligent antenna applicable to the handheld equipment is compact in structure, small in size and capable of meeting requirements on miniaturization, and is capable of enabling a radiating direction of an antenna array to deflect to the pointed position.
Description
Technical field
The invention belongs to hand-held terminal device field, relate to a kind of novel smart antenna, this antenna element frequency coverage GSM900 and PCS 1900 frequency range, can realize the function in deflect radiation direction.
Background technology
Increasing sharply in recent years along with Internet user, the broadband access demand of residential and business customer obviously increases, thus has promoted development and the raising of access technology and network.Cable and DSL (digital subscriber line) occupy very great share at bandwidth access market, can solve the transmission problem of " last one kilometer " between Internet service provider and end user preferably.Broadband wireless access (BWA) technology is also more and more welcome as the third access technology.Compare with telephone wire with traditional cable, BWA system is easy to install, and data transmission efficiency is high, and maintenance cost is low, is easy to upgrading etc.Typical broadband access system is communicated with subscriber terminal equipment (CPE) by transceiver base station (BTS).Although wireless access has many good qualities, challenge is also more.As spectrum efficiency problems, network scalability issues, CPE Antenna Design problem, the integrity problem of non-line-of-sight scope, the intersymbol interference problem (affecting speech quality) that multipath effect causes, co-channel interference (capacity of influential system) etc. that channeling causes.The effective scheme addressed these problems adopts smart antenna.
The array that smart antenna is made up of multiple antenna element, the main beam of antenna is made to aim at designated user direction by the phase place of control antenna unit, and aim at interference source direction at secondary lobe and zero point, reach the capacity, coverage and the efficiency of transmission that improve wireless system.In second and third wireless communication system, smart antenna is only as subsidiary function in generation.In order to utilize frequency spectrum fully, reducing cost of arranging net, improving service quality, realize restructural, sane across a network operation, should smart antenna be adopted in wireless system design of future generation.
Someone proposes phase array smart antenna, this array be made up of around the dipole (exciting unit) that adds excitation the dipole (parasitic element) that 6 do not add excitation.Below the dipole that 6 do not add excitation, connect tunable capacitor.By specific antenna pattern, calculate antenna and port current, adopt preferred univariant search method to obtain the value of each tunable capacitor, by the coupling of parasitic element and exciting unit, reach and make antenna pattern turn to assigned direction.But due to the limitation of dipole size, its model can not be made for the handheld device in modern times, such as mobile phone etc.Someone adopts ESPAR Antenna Design smart antenna, although energy deflect radiation directional diagram, its size can not be adapted in the handheld device of modern communications.Someone utilizes inverse-F antenna and the Antenna Design of falling L smart antenna, although its size can be applied to handheld device, and the DeGrain of its yawing moment figure, and also its gain of radiation direction after deflection does not increase.
Above-mentioned various smart antennas all can not be used in modern handsets, can not improve the experience of user.Therefore, research is applicable to the design of the novel intelligent antenna of handheld device is be necessary very much and have certain practical significance.
Summary of the invention
The invention provides a kind of design that can make the smart antenna of the radiation direction deflection ad-hoc location of antenna, Antenna Operation, in GSM 900 and PCS 1900 frequency range, while deflect radiation direction, can also improve gain.
The present invention adopts following technical scheme:
A kind of smart antenna that can be used for handheld device, comprise 4 pieces and be in conplane little medium substrate, the first medium substrate overlapped and second largest medium substrate, and large medium substrate is parallel to little medium substrate, first medium substrate and little medium substrate are at a distance of 4mm;
Little medium substrate is provided with the metal radiation paster of planar inverted-F antenna, metal ground plane is arranged on the first surface of first medium substrate and second surface and surrounding 4 faces; Feeding network is arranged on the second surface of second medium substrate; Each little medium substrate is provided with two ground short circuit posts (PB, PC) and a feed conductive pole (PA); One end of two ground short circuit posts (PB, PC) is connected with the first surface of first medium substrate, and the other end, through little medium substrate, is connected with the first surface of metal radiation paster; One end of a feed conductive pole (PA) is connected through the microstrip transmission line of first medium substrate and second largest medium substrate second surface and feeding network, and the other end is connected with the first surface of metal radiation paster through little medium substrate;
The metal radiation paster of described planar inverted-F antenna is divided into two parts, on the first surface being arranged on little medium substrate and second surface; Part I is positioned at the first surface of little medium substrate, and each metal radiation paster is polygon, point 5 branch road (branch road A, branch road B, branch road C, branch road D, branch road E) structures; The length of branch road A and branch road B meets the length of low frequency part 1/4 wavelength, and the length of branch road A is 58mm, and the length of branch road B is 49mm; The length of branch road C and branch road E meets the length of HFS 1/4 wavelength, and the length of branch road C is 12mm, and the length of branch road E is 18mm; Part II is positioned at the second surface of little medium substrate, the rectangular strap glue copper sheet of to be length and width be 36mm × 20mm;
The metal radiation paster of 4 described planar inverted-F antennas is arranged in four corners of large medium substrate by Central Symmetry; The length of whole aerial array × wide is of a size of: 140mm × 80mm.
The impedance matching of metal radiation paster is completed by the band glue copper sheet of the second surface of little medium substrate, and working frequency range is determined by the length of 4 branch roads (branch road A, branch road B, branch road C, branch road E) of the first surface of little medium substrate.
The overall dimensions of metal radiation paster is less than 1/4 wavelength meeting low-limit frequency and require, low-limit frequency wavelength is 348mm.
The first surface of first medium substrate, second surface and surrounding all apply copper, the first surface of first medium substrate is connected with second surface on electrically, becomes same piece of land.
Described feeding network adopts 1/4 impedance transformer, and length is 1/4 operation wavelength, the edge impedance of smart antenna array is reached with modular connection 50 ohmage and mates.
Beneficial effect
The present invention devises the smart antenna that is applicable to handheld device, is operated in GSM 900 and PCS 1900 frequency range.In GSM 900 frequency range, select 920MHz; In PCS 1900 frequency range, 1960MHz is selected to design smart antenna.Wherein when 920MHz, the gain of antenna element is-1.56dBi, and when 1960MHz, the gain of antenna element is 0.96dBi.Behind deflect radiation direction, low-frequency gain can increase 3.35dBi, and high-frequency gain is minimum can increase 0.99dBi.And the effect of deflection is fine.
Accompanying drawing explanation
Fig. 1 is little medium baseplate structure schematic diagram of the present invention.
Fig. 2 is structural representation of the present invention.
Fig. 3 is the return loss plot of actual measurement of the present invention and emulation.
Fig. 4 is that the present invention deflects into the feeding network of z-axis positive direction in 920MHz radiation direction.
Fig. 5 is that the present invention deflects into the feeding network of x-axis positive direction in 1960MHz radiation direction.
Fig. 6 is that the present invention deflects into the feeding network of y-axis positive direction in 1960MHz radiation direction.
Fig. 7 is that the present invention deflects into the feeding network of z-axis positive direction in 1960MHz radiation direction.
Fig. 8 is the present invention deflects into the antenna pattern of z-axis positive direction actual measurement and analogous diagram in 920MHz radiation direction.
Fig. 9 is the present invention deflects into the antenna pattern of x-axis positive direction actual measurement and analogous diagram in 1960MHz radiation direction.
Figure 10 is the present invention deflects into the antenna pattern of y-axis positive direction actual measurement and analogous diagram in 1960MHz radiation direction.
Figure 11 is the present invention deflects into the antenna pattern of z-axis positive direction actual measurement and analogous diagram in 1960MHz radiation direction.
Embodiment
See Fig. 1 (a) and Fig. 1 (b), the radiation mechanism of microstrip antenna is described.Can see from Fig. 1 (a), whole antenna element is made up of 5 branch roads, wherein branch road A and branch road B controls low frequency part, because GSM 900 frequency range is wider, simple single inverse-F antenna can not meet this requirement, so adopt use two bandwidth to form the requirement of a complete satisfied covering special frequency channel, branch road C and branch road E controls high frequency PCS 1900 frequency range, and principle is the same with low-frequency range.It should be noted that branch road A, the length setting of B, C, E is about 1/4 medium wavelength.Fig. 1 (b) is the second surface of the little medium substrate of antenna element, and effect makes antenna reach coupling in specific frequency range by current coupling.PA point is distributing point, and PB, PC are ground short circuit points.By branch road, the interaction of compatible portion and short circuit post, obtains the working frequency range of required antenna element.
Table 1 is the metal radiation patch parameters of planar inverted-F antenna of the present invention, is the detailed dimensions of individual antenna unit various piece.
| 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 structural representation of the present invention.Wherein Fig. 2 (a) is vertical view, and Fig. 2 (b) is front view, and Fig. 2 (c) is left/right view.These three figure indicate the mode of structuring the formation of aerial array and concrete size from different directions.
As seen from Figure 2, the present invention adopts two pieces of onesize medium substrates, and first medium substrate is as supporting role, and second largest medium substrate is used for designing feeding network.At the first surface of first medium substrate, second surface and surrounding all apply copper, make the first surface of first medium substrate and second surface be in the state on same ground, meet the requirement that the ground short circuit post of inverse-F antenna and feed conductive pole are connected to same ground.
Fig. 3 is the return loss plot of antenna element, return loss is the parameter representing signal reflex performance, it refers at Fiber connection place, back reflected laser (successively to the scattered light of input transmission) inputs the decibels of the ratio of light relatively, return loss is larger better, to reduce the impact of reverberation on light source and system.Usually require that reflection power is little as far as possible, so just have more power to be sent to load.In the design, require that return loss is lower than-5dB for low frequency part, the return loss of HFS is lower than-10dB.
Fig. 4-7 is schematic diagrames of feeding network, and the design adopts parallelly feeding, and parallelly feeding is together in parallel by each antenna element microstrip transmission line, and concerning the transmission line of feed, each antenna element is equivalent to a multiport network.Generally speaking, the edge impedance of microstrip antenna does not also meet general 50 ohm of microwave device, at this moment just needs to adopt impedance transformer.Amplitude needed for each antenna port and phase place, adopt different impedance variation devices, wherein the width of impedance transformer determines the amplitude distribution of final feeding network, and the length of impedance transformer determines the PHASE DISTRIBUTION of feeding network.
Fig. 8-11 is antenna patterns of smart antenna all directions.Fig. 8 is antenna deflects into the antenna pattern of z-axis positive direction actual measurement and analogous diagram in 920MHz radiation direction.At 920MHz, the gain size of individual antenna is-1.56dBi, and the maximum gain making the radiation direction of aerial array deflect into z-axis positive direction is 1.79dBi, and as can be seen from the figure, the radiation direction deflection of aerial array is to z-axis positive direction.Fig. 9 is antenna deflects into the antenna pattern of x-axis positive direction actual measurement and analogous diagram in 1960MHz radiation direction.At 1960MHz, the gain size of individual antenna is 0.96dBi, and the maximum gain making the radiation direction of aerial array deflect into x-axis positive direction is 1.95dBi, and as can be seen from the figure, the radiation direction deflection of aerial array is to x-axis positive direction.Figure 10 is antenna deflects into the antenna pattern of y-axis positive direction actual measurement and analogous diagram in 1960MHz radiation direction.At 1960MHz, the maximum gain making the radiation direction of aerial array deflect into y-axis positive direction is 3.25dBi, and as can be seen from the figure, the radiation direction deflection of aerial array is to y-axis positive direction.Figure 11 is antenna deflects into the antenna pattern of z-axis positive direction actual measurement and analogous diagram in 1960MHz radiation direction.At 1960MHz, the maximum gain making the radiation direction of aerial array deflect into z-axis positive direction is 3.34dBi, and as can be seen from the figure, the radiation direction deflection of aerial array is to z-axis positive direction.
Obviously can find out that from figure the design can make the radiation direction of aerial array deflect into the position of specifying, and successful.
Claims (5)
1. one kind can be used for the smart antenna of handheld device, it is characterized in that: comprise 4 pieces and be in conplane little medium substrate, the first medium substrate overlapped and second largest medium substrate, and large medium substrate is parallel to little medium substrate, first medium substrate and little medium substrate are at a distance of 4mm;
Little medium substrate is provided with the metal radiation paster of planar inverted-F antenna, metal ground plane is arranged on the first surface of first medium substrate and second surface and surrounding 4 faces; Feeding network is arranged on the second surface of second medium substrate; Each little medium substrate is provided with two ground short circuit posts (PB, PC) and a feed conductive pole (PA); One end of two ground short circuit posts (PB, PC) is connected with the first surface of first medium substrate, and the other end, through little medium substrate, is connected with the first surface of metal radiation paster; One end of a feed conductive pole (PA) is connected through the microstrip transmission line of first medium substrate and second largest medium substrate second surface and feeding network, and the other end is connected with the first surface of metal radiation paster through little medium substrate;
The metal radiation paster of described planar inverted-F antenna is divided into two parts, on the first surface being arranged on little medium substrate and second surface; Part I is positioned at the first surface of little medium substrate, and each metal radiation paster is polygon, point 5 branch road (branch road A, branch road B, branch road C, branch road D, branch road E) structures; The length of branch road A and branch road B meets the length of low frequency part 1/4 wavelength, and the length of branch road A is 58mm, and the length of branch road B is 49mm; The length of branch road C and branch road E meets the length of HFS 1/4 wavelength, and the length of branch road C is 12mm, and the length of branch road E is 18mm; Part II is positioned at the second surface of little medium substrate, the rectangular strap glue copper sheet of to be length and width be 36mm × 20mm;
The metal radiation paster of 4 described planar inverted-F antennas is arranged in four corners of large medium substrate by Central Symmetry; The length of whole aerial array × wide is of a size of: 140mm × 80mm.
2. a kind of smart antenna that can be used for handheld device according to claim 1, it is characterized in that: the impedance matching of metal radiation paster is completed by the band glue copper sheet of the second surface of little medium substrate, working frequency range is determined by the length of 4 branch roads (branch road A, branch road B, branch road C, branch road E) of the first surface of little medium substrate.
3. a kind of smart antenna that can be used for handheld device according to claim 2, is characterized in that: the overall dimensions of metal radiation paster is less than 1/4 wavelength meeting low-limit frequency and require, low-limit frequency wavelength is 348mm.
4. a kind of smart antenna that can be used for handheld device according to claim 3, it is characterized in that: the first surface of first medium substrate, second surface and surrounding all apply copper, the first surface of first medium substrate is connected with second surface on electrically, becomes same piece of land.
5. a kind of smart antenna that can be used for handheld device according to claim 4, it is characterized in that: described feeding network adopts 1/4 impedance transformer, length is 1/4 operation wavelength, the edge impedance of smart antenna array is reached with modular connection 50 ohmage and mates.
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 |
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| CN201510226653.6A CN104953255B (en) | 2015-05-06 | 2015-05-06 | A kind of smart antenna available for handheld device |
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| CN104953255A true CN104953255A (en) | 2015-09-30 |
| CN104953255B 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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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591189A (en) * | 2015-12-03 | 2016-05-18 | 深圳市天鼎微波科技有限公司 | Low-SAR-value type handset antenna |
| 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 |
| CN111937233A (en) * | 2018-03-30 | 2020-11-13 | 株式会社村田制作所 | Antenna module and communication device equipped with same |
Citations (4)
| 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 |
| US20110095947A1 (en) * | 2009-10-23 | 2011-04-28 | Chih-Shen Chou | Miniature multi-frequency antenna |
| CN102782936A (en) * | 2010-03-05 | 2012-11-14 | 捷讯研究有限公司 | Diversity antenna system comprising meander pattern antennas |
| US20140100004A1 (en) * | 2012-10-08 | 2014-04-10 | Apple Inc. | Tunable Multiband Antenna with Dielectric Carrier |
-
2015
- 2015-05-06 CN CN201510226653.6A patent/CN104953255B/en not_active Expired - Fee Related
Patent Citations (4)
| 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 |
| US20110095947A1 (en) * | 2009-10-23 | 2011-04-28 | Chih-Shen Chou | Miniature multi-frequency antenna |
| CN102782936A (en) * | 2010-03-05 | 2012-11-14 | 捷讯研究有限公司 | Diversity antenna system comprising meander pattern antennas |
| US20140100004A1 (en) * | 2012-10-08 | 2014-04-10 | Apple Inc. | Tunable Multiband Antenna with Dielectric Carrier |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591189A (en) * | 2015-12-03 | 2016-05-18 | 深圳市天鼎微波科技有限公司 | Low-SAR-value type handset antenna |
| 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 |
| CN108511890B (en) * | 2018-02-06 | 2024-05-28 | 深圳市摩尔环宇通信技术有限公司 | 5G multi-band mobile phone antenna |
| CN111937233A (en) * | 2018-03-30 | 2020-11-13 | 株式会社村田制作所 | Antenna module and communication device equipped with same |
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| Publication number | Publication date |
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| CN104953255B (en) | 2017-11-14 |
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