CN101212082B - Mixed microstrip line device for suppressing electromagnetic radiation of dual-band mobile telephone - Google Patents
Mixed microstrip line device for suppressing electromagnetic radiation of dual-band mobile telephone Download PDFInfo
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- CN101212082B CN101212082B CN2006101053571A CN200610105357A CN101212082B CN 101212082 B CN101212082 B CN 101212082B CN 2006101053571 A CN2006101053571 A CN 2006101053571A CN 200610105357 A CN200610105357 A CN 200610105357A CN 101212082 B CN101212082 B CN 101212082B
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- microstrip line
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- mobile phone
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- 230000005670 electromagnetic radiation Effects 0.000 title claims abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 35
- 229910052751 metal Inorganic materials 0.000 claims abstract description 35
- 239000003990 capacitor Substances 0.000 claims abstract description 34
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052802 copper Inorganic materials 0.000 claims abstract description 18
- 239000010949 copper Substances 0.000 claims abstract description 18
- 239000000758 substrate Substances 0.000 claims 8
- 210000004556 brain Anatomy 0.000 abstract description 5
- 230000006378 damage Effects 0.000 abstract description 3
- -1 chip inductors Substances 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 7
- 238000005538 encapsulation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000003822 epoxy resin Substances 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229920000647 polyepoxide Polymers 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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Abstract
本发明涉及一种抑制双频手机电磁辐射的混合微带线装置，该装置包括微带线，贴片电感LL，贴片电容CL，一金属接收板，一拐角微带线，一锥形微带线，一接地点，一U形金属带，两块外置金属传导片。该装置的金属接收板、左/右手混合微带线及接地点构成微波LC回路，能够有效消耗手机的过量电磁辐射，由此降低手机使用者脑部的伤害程度。本发明采用低成本的贴片电容、贴片电感、金属铜片导体和微带线来制造，具有造价低廉，易于组装，方便嵌入双频手机内部等优点。
The invention relates to a hybrid microstrip line device for suppressing electromagnetic radiation of a dual-frequency mobile phone. The device includes a microstrip line, a chip inductor L L , a chip capacitor C L , a metal receiving plate, a corner microstrip line, a Shaped microstrip line, a grounding point, a U-shaped metal strip, and two external metal conductive sheets. The metal receiving plate of the device, the left/right hand mixed microstrip line and the grounding point constitute a microwave LC loop, which can effectively consume excess electromagnetic radiation of the mobile phone, thereby reducing the damage to the brain of the mobile phone user. The invention adopts low-cost chip capacitors, chip inductors, metal copper conductors and microstrip lines to manufacture, and has the advantages of low cost, easy assembly, and convenient embedding into the dual-frequency mobile phone.
Description
Technical field
The present invention relates to a kind of mixed microstrip line device that suppresses electromagnetic radiation of dual-band mobile telephone.
Background technology
The person-to-person communication industry emerges rapidly in recent years, and only global system mobile service (GSM) just hews out several frequency ranges, comprises GSM900MHz and GSM1800MHz (DCS).When mobile phone offers convenience to people, also, many negative effects have been caused owing in the design and use, produce excessive electromagnetic radiation when having caused mobile phone communication.Field strength measurement shows that the main radiation source of mobile phone is an antenna, and the electromagnetic radiation of excess is arranged in its near-field region scope.Under the design trend of, multifunction lightening, built-inization of antenna, how can both guarantee speech quality, effectively reduce electromagnetic radiation of mobile telephone again the injury of using the mobile phone person to cause has been become a problem demanding prompt solution at mobile phone.
The notion of " LHM (left-handed materials) " was taken the lead in 1967 proposing by V.G.Veselago, and it is that one type of dielectric constant and magnetic permeability are the material of negative value simultaneously, and occurring in nature does not exist.Calendar year 2001, D.R.Smith etc. prepare the artificial LHM sample based on the microwave frequency band of metal openings resonant ring/metal wire structure, and are able to checking through the negative refraction experiment.2002, a kind of transmission line model of propositions such as G.V.Eleftheriades was constructed the LHM of special frequency, in transmission line, periodically loaded patch capacitor and chip inductor and can realize negative magnetoconductivity and negative permittivity respectively.A this left side/right hand mixed microstrip line presents left hand passband effect and right hand stopband effect in the certain frequency scope under electromagnetic field excitation.The microstrip line that only loads patch capacitor or only load chip inductor then shows significant high pass characteristic.Utilize stopband effect and high pass characteristic, a left side/right hand mixed microstrip line can suppress electromagnetic transmission and radiation well.
Summary of the invention
The object of the present invention is to provide a kind of device based on a left side/right hand mixed microstrip line; Can overcome the existing excessive deficiency of electromagnetic radiation of mobile telephone effectively; The almost whole losses of electromagnetic radiation are not outwards overflowed in mobile phone inside; Reduce the human brain degree that is hurt, and the convenient dual-band mobile phone that embeds is inner.
The present invention includes a left side/right hand mixed microstrip line that loads patch capacitor and chip inductor, load the microstrip line and the independent microstrip line that loads chip inductor of patch capacitor separately.Microstrip line mainly comprises:
, a glass fabric of epoxy resin microwave base plate;
A rectangular metal ground plate, it is etched in said microwave base plate one side, and size can cover whole base plate;
One row's rectangular metal conduction band, the another side that it is etched in said microwave base plate is periodic arrangement, between leave the slit;
A series of patch capacitors;
A series of chip inductors.
Columned through hole is stamped in center at each section metal conduction band, and patch capacitor is welded between each section conduction band with the mode of series connection; Chip inductor embeds in the through hole, and weld with conduction band and ground plate respectively upper end, lower end.
Built-in antenna of mobile phone leaks parasitic radiation meeting that high-frequency current causes to mobile phone body people's brain is caused very big injury.For this reason; The collecting part of a metal dash receiver as electromagnetic radiation of mobile telephone is set under antenna; The turning microstrip feed line of electromagnetic radiation through one 50 Ω get into load patch capacitor with (or) microstrip line of chip inductor; By the taper microstrip feed line output of other one 50 Ω, link to each other subsequently with the earth point of cell phone rear cover inside bottom.Article two, metal spring leaf is all adopted in the microstrip feed line termination of 50 Ω, is convenient to install.Cellie's hand fully contacts the earth point of cell phone rear cover in order to converse, and earth point is connected with the external metal conductive sheet of hand set machine shell upper and lower side through a U-shaped metal tape.During conversation; This external metal conductive sheet contacts with the hand that uses the mobile phone person, therefore becomes the equipotentiality body with the earth conducting, forms a microwave LC loop; Form electrical potential difference between radio frequency input point and the earth point, the electromagnetic wave of mobile phone near-field region radiation transmits in microstrip line.Length and conduction band unit number through design conduction band and slit; And arrange in pairs or groups different patch capacitors and chip inductor; Make the stopband and the electromagnetic forbidden band of a left side/right hand mixed microstrip line can cover antenna for mobile phone low frequency 900MHz and two working frequency range of high frequency 1800MHz fully, therefore the electromagnetic radiation of mobile phone is inhibited.
Description of drawings
Fig. 1 left side/right hand mixed microstrip line cellular construction sketch map;
Fig. 2 utilizes a left side/right hand mixed microstrip line to suppress electromagnetic radiation of dual-band mobile telephone device sketch map;
The microwave S of Fig. 3 left side/right hand mixed microstrip line
21Transmission curve;
Fig. 4 only loads the microwave S of the microstrip line of chip inductor
21Transmission curve;
Fig. 5 only loads the microwave S of the microstrip line of patch capacitor
21Transmission curve.
Embodiment
A left side/right hand mixed microstrip line cellular construction sketch map such as Fig. 1 of this paper design, wherein (a) is cutaway view, (b) is vertical view.At thickness is that h, dielectric constant are the rectangular metal conduction band 12 of the single periodic arrangement of a facet etch of the individual layer microwave base plate 11 of ε, and its structural parameters are included as: conduction band length d (containing slit g), width w, unit number n and metal thickness t; Another side is for covering the rectangular metal ground plate 13 of whole microwave base plate 11, and the ground plate width is D.The center position of every section conduction band is stamped the cylindric through hole 14 perpendicular to microwave base plate respectively, and the aperture is Φ.Microwave base plate thickness h, DIELECTRIC CONSTANTS and conduction band width w and metal thickness t be isoparametric to be arranged so that the characteristic impedance of microstrip line when frequency ranges such as low frequency 900MHz and high frequency 1800MHz are worked all can satisfy 50 Ω.Utilize C
LAnd L
LPatch capacitor 15 and the chip inductor 16 of representing loading respectively.
Fig. 2 (a) and (b) are for suppressing the device sketch map of electromagnetic radiation of dual-band mobile telephone.Described metallic copper dash receiver 24 mobile phone of collecting has been got into mixed microstrip line towards the electromagnetic radiation of human brain through turning microstrip line 22, fastened under the situation of mobile phone, outputed to earth point 23 by taper microstrip line 25 at cell phone rear cover 29; Earth point 23 is delivered to the up and down external metallic copper conductive sheet 27 at two ends of mobile phone through U-shaped metal copper strips 26 with electromagnetic riveting machine signal, uses mobile phone person's hand to contact with external metallic copper conductive sheet 27, so with the earth conducting.The position of mixed microstrip line does not influence the normal assembling of battery of mobile phone 28 in the inner side of mobile phone.During application; Through regulate to load patch capacitor 15 with (or) structural parameters of the microstrip line of chip inductor 16 and the stopband that component parameters makes microstrip line or electromagnetic forbidden band two working frequency range that can cover antenna for mobile phone 21 fully; Make almost whole in microstrip line and no longer outside excess radiation of losses of electromagnetic radiation, thereby protected human brain safety.
Implementation procedure of the present invention and material behavior are by embodiment and description of drawings:
Embodiment one:
Utilize technology such as etching or printing that metallic copper is formed in the surface of microwave base plate, to accomplish the making of a left side/right hand mixed microstrip line, it specifically prepares process such as the enforcement mode is said.The relative parameters setting of microstrip line is: h=1.50mm, ε=4.65 (glass fabric of epoxy resin), d=8.00mm, g=0.90mm, w=2.80mm, n=8, t=0.018mm, Φ=1.50mm and D=8.80mm.With a series of encapsulation number be 0603 chip inductor L
LBe welded in parallel between metal conduction band and the metal ground plate; Simultaneously number be 0805 patch capacitor C a series of encapsulation
LBe serially connected between the adjacent metal conduction band, the two ends of patch capacitor respectively with the end of two sections conduction bands along welding, be assemblied in directly over the slit just.By shown in Figure 3, C
L=5.1pF, L
LAn extremely wide stopband appears in a left side/right hand mixed microstrip line of=4.7nH combination in the 1300-1960MHz frequency range, it has covered the high-frequency work frequency range of mobile phone fully, and the average transmission amplitude of this stopband is-25dB.
Embodiment two:
Similar with embodiment one, utilize technology such as etching or printing that metallic copper is formed in the surface of microwave base plate, to accomplish the making of a left side/right hand mixed microstrip line, it specifically prepares process such as the enforcement mode is said.The relative parameters setting of microstrip line is: h=1.50mm, ε=4.65 (glass fabric of epoxy resin), d=8.00mm, g=0.90mm, w=2.80mm, n=8, t=0.018mm, Φ=1.50mm and D=8.80mm.With a series of encapsulation number be 0805 patch capacitor C
LBe serially connected between the adjacent metal conduction band, the two ends of patch capacitor respectively with the end of two sections conduction bands along welding, be assemblied in directly over the slit just; Simultaneously number be 0603 chip inductor L a series of encapsulation
LBe welded in parallel between metal conduction band and the metal ground plate.Still know C by Fig. 3
L=2.0pF, L
LA wide stopband appears in a left side/right hand mixed microstrip line of=10.0nH combination in the 1425-1960MHz frequency range, it has covered the high-frequency work frequency range of mobile phone fully, and the average transmission amplitude of this stopband is-15dB.
Embodiment three:
Utilize technology such as etching or printing that metallic copper is formed in the surface of microwave base plate, its specifically prepare process such as the enforcement mode said, the used basic structural unit of present embodiment is for only loading the microstrip line of chip inductor.The relative parameters setting of microstrip line is: h=1.50mm, ε=4.65 (glass fabric of epoxy resin), d=6.00mm, g=0.80mm, w=2.80mm, n=6, t=0.018mm, Φ=1.50mm and D=8.80mm.With a series of encapsulation number be 0603, L
LThe chip inductor of=1.0nH with and the mode that connects be welded between metallic copper conduction band and the ground plate.Chip inductor L
LAlso can select 1.8nH, 2.2nH for use.Fig. 4 is the microwave transmission curve that only loads the microstrip line of chip inductor, can know the inductance to 1.0nH, 1.8nH and 2.2nH by figure, and all at the electromagnetic forbidden band of the following frequency range of 2000MHz appearance less than-50dB, it can cover the two-frequency operation frequency range of mobile phone fully.
Embodiment four:
Utilize technology such as etching or printing that metallic copper is formed in the surface of microwave base plate, its specifically prepare process such as the enforcement mode the fan, the used basic structural unit of present embodiment is for only loading the microstrip line of patch capacitor.The relative parameters setting of microstrip line is: h=1.50mm, ε=4.65 (glass fabric of epoxy resin), d=8.00mm, g=0.90mm, w=2.80mm, n=6, t=0.018mm, and D=8.80mm.Do not have through hole on the microstrip line this moment.With a series of encapsulation number be 0805, C
LThe patch capacitor of=0.5pF is welded between the adjacent metal copper conduction band with the serial connection mode.Patch capacitor C
LAlso can select 1.0pF, 1.5pF for use.Fig. 5 is the microwave transmission curve that only loads the microstrip line of patch capacitor, can know the electric capacity to 0.5pF, 1.0pF and 1.5pF by figure, all occurs less than-15dB electromagnetic forbidden band in the following frequency range of 1960MHz, and it can cover the two-frequency operation frequency range of mobile phone fully.
The above; It only is preferred embodiment of the present invention; Can not therefore limit to interest field of the present invention, other various corresponding changes and retouchings of being done according to claim of the present invention and description of the invention content such as all should belong within the protection range that patent of the present invention requires.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101053571A CN101212082B (en) | 2006-12-29 | 2006-12-29 | Mixed microstrip line device for suppressing electromagnetic radiation of dual-band mobile telephone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101053571A CN101212082B (en) | 2006-12-29 | 2006-12-29 | Mixed microstrip line device for suppressing electromagnetic radiation of dual-band mobile telephone |
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| Publication Number | Publication Date |
|---|---|
| CN101212082A CN101212082A (en) | 2008-07-02 |
| CN101212082B true CN101212082B (en) | 2012-01-11 |
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| CN2006101053571A Expired - Fee Related CN101212082B (en) | 2006-12-29 | 2006-12-29 | Mixed microstrip line device for suppressing electromagnetic radiation of dual-band mobile telephone |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102394514B (en) * | 2011-08-15 | 2014-04-16 | 浙江大学 | Microwave energy receiving board formed by secondary wavelength resonance structural units |
| CN209001126U (en) * | 2018-06-11 | 2019-06-18 | 深圳迈睿智能科技有限公司 | Antenna |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1431734A (en) * | 2002-01-10 | 2003-07-23 | 飞元科技股份有限公司 | Dual frequency panel antenna and its radiating metal sheet |
| CN1507112A (en) * | 2002-12-06 | 2004-06-23 | 广达电脑股份有限公司 | multi-frequency antenna of portable electronic device |
| US7046196B1 (en) * | 1999-09-30 | 2006-05-16 | Harada Industry Co., Ltd. | Dual-band microstrip antenna |
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2006
- 2006-12-29 CN CN2006101053571A patent/CN101212082B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7046196B1 (en) * | 1999-09-30 | 2006-05-16 | Harada Industry Co., Ltd. | Dual-band microstrip antenna |
| CN1431734A (en) * | 2002-01-10 | 2003-07-23 | 飞元科技股份有限公司 | Dual frequency panel antenna and its radiating metal sheet |
| CN1507112A (en) * | 2002-12-06 | 2004-06-23 | 广达电脑股份有限公司 | multi-frequency antenna of portable electronic device |
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| CN101212082A (en) | 2008-07-02 |
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Granted publication date: 20120111 Termination date: 20121229 |