CN101772295A - Mobile terminal grounding device - Google Patents
Mobile terminal grounding device Download PDFInfo
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- CN101772295A CN101772295A CN200910044973A CN200910044973A CN101772295A CN 101772295 A CN101772295 A CN 101772295A CN 200910044973 A CN200910044973 A CN 200910044973A CN 200910044973 A CN200910044973 A CN 200910044973A CN 101772295 A CN101772295 A CN 101772295A
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- mobile terminal
- usb plug
- grounding device
- usb
- electric conductor
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Abstract
The invention discloses a mobile terminal grounding device which comprises a computer with a USB interface and a mobile terminal with an antenna; wherein the mobile terminal is provided with a USB plug used for being connected with the computer and also comprises a conductor which is wound on the outer surface of the USB plug to enlarge the grounding area of the USB plug. By adopting the mobile terminal grounding device, the grounding area of the USB plug of the mobile terminal can be effectively enlarged, and the antenna receiving performance of USB modem type mobile terminal equipment can be improved.
Description
Technical field
The present invention relates to a kind of EMC/EMI technology, particularly relate to a kind of mobile communication terminal antenna reception technique of the USB of being applicable to modem class.
Background technology
Along with the development of electric and electronic technology, the extensive use of radio and television, post and telecommunications and computer network, the complicated day by day and deterioration of electromagnetic environment makes the Electromagnetic Compatibility problem of electrical and electronic product become increasingly conspicuous.EMC is the abbreviation of Electro Magnetic Compatibility, i.e. electromagnetic compatibility.EMC comprises EMI (electromagnetic interference) and EMS (electromagnetism resistance) two partly, so-called EMI electromagnetic interference, by machine this in the process of carrying out proper function generation be unfavorable for the electromagnetic noise of other system; And EMS is meant the ability that machine is not influenced by periphery electromagnetic environment in the process of carrying out proper function.The Electromagnetic Compatibility of electronics, electric equipment products is very important quality index; it not only is related to the functional reliability and the safety in utilization of product itself; but also may have influence on the operate as normal of other equipment and system, be related to the protection problem of electromagnetic environment.
At present, the functional requirement of mobile terminal device is more and more, and that outward appearance is wished is thinner littler, and multi-functional components and parts and each module are moved in so little space, the problem of electromagnetic compatibility and electromagnetic interference will occur.This just relates to the EMC/EMI designing technique.In general, the design of electromagnetic compatibility comprise design, the wiring board of design, the software of circuit design, add slider such as radome class formation body, holding wire and power line carried out the design of Filtering Processing, earthing mode.When the antenna of design mobile communication terminal, find that it is more obvious that the radiance of antenna is influenced by the EMC/EMI of entire equipment, especially the receptivity of antenna.The quality of the antenna performance of mobile communication terminal more and more is subjected to client's attention.In the process of design USB modem class mobile communication terminal antenna, find that when using lithium battery power supply, the performance that transmits and receives of mobile communication terminal antenna is all done well.Test and directly be inserted on the USB joint of computer, still fine its receptivity of the emitting performance of antenna has then reduced greatly.Such as, when directly being inserted into USB modem on the notebook computer USB interface, this moment, the antenna receptivity of equipment reduced by 4 db.The user will directly have influence on user's normal use, even can bring the consequence of net when this equipment of use is got online without being tethered to a cable.
Summary of the invention
The technical problem to be solved in the present invention is for after overcoming on the USB interface that prior USB modem class mobile terminal device is inserted into computer, defective because of the electromagnetic interference that is subjected to computer descends the antenna receptivity of mobile terminal device provides a kind of mobile terminal grounding device that can effectively improve USB modem class mobile terminal antenna performance.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of mobile terminal grounding device, it comprises: the computer of a band USB interface, the portable terminal of one band antenna, this portable terminal has one and is used for the USB plug that is connected with this computer, its characteristics are, this portable terminal also comprises an electric conductor, and this electric conductor is set around this USB plug outer surface, is used to increase the contact area of this USB plug.
Preferably, an affixed printed circuit board (PCB) in this USB plug.
Preferably, four pads are arranged on this printed circuit board (PCB), the USB plug of this portable terminal has four pins, and wherein a pin is by a pad ground connection in four pads of this printed circuit board (PCB).
Preferably, this electric conductor twine this USB plug surface one circle and with the ground conducting of this printed circuit board (PCB).
Preferably, this electric conductor is the conductive fabric of single face glue or double faced adhesive tape.
Preferably, this electric conductor is shaped as a strip.
Preferably, this printed circuit board (PCB) is provided with one and reveals the copper zone, this electric conductor also comprise a termination, this termination be used for this USB plug directly with the regional ground connection of the dew copper of printed circuit board (PCB).
Preferably, this termination and this electric conductor are one of the forming.
Preferably, this portable terminal is a USB Modem.
Positive progressive effect of the present invention is: adopt mobile terminal grounding device of the present invention, can effectively increase the contact area of mobile terminal USB, improve USB modem class mobile terminal device antenna receptivity.
Description of drawings
Fig. 1 is the three-dimensional structure diagram of the USB plug of mobile terminal grounding device of the present invention.
Fig. 2 is the conductor construction figure of mobile terminal grounding device of the present invention.
Fig. 3 is the Facad structure figure of the USB plug of mobile terminal grounding device of the present invention.
Fig. 4 is the structure figure of the USB plug of mobile terminal grounding device of the present invention.
Fig. 5 is the structure chart with the positive pcb board of fitting of USB plug of being used for of mobile terminal grounding device of the present invention.
Fig. 6 go up to reveal the structure chart in copper zone for the fit PCB at the USB plug back side of being used to of mobile terminal grounding device of the present invention.
Fig. 7 begins to twine the initial state figure of electric conductor for the USB plug of mobile terminal grounding device of the present invention.
Fig. 8 is the Facad structure figure after the electric conductor of mobile terminal grounding device of the present invention twines USB plug one circle.
Fig. 9 is the structure figure of the USB plug of mobile terminal grounding device of the present invention.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
As Fig. 1～shown in Figure 9, a kind of mobile terminal grounding device, it comprises: the computer of a band USB interface (not indicating among the figure), one mobile terminal device (not indicating among the figure), this portable terminal also has an antenna (not indicating among the figure) and a USB plug 2, and USB plug 2 is connected with the USB interface of this computer.This portable terminal also comprises an electric conductor 1, and this electric conductor 1 is wound on this USB plug 2, is used to increase the contact area of this USB plug 2, thereby increases the antenna receptivity of this mobile terminal device.As Fig. 1～shown in Figure 9, the USB plug 2 of this portable terminal has four pins (PIN) 3, and wherein a pin (PIN) 3 is by pad (PAD) ground connection.A USB plug 2 and a printed circuit board (PCB) ((PCB, Printed circuit board)) welding and with the ground conducting of this pcb board.As Fig. 8, shown in Figure 9, after USB plug 2 was welded on the pcb board, electric conductor 1 was in conjunction with the dew copper of the need ground connection of pcb board zone 1a part, around USB plug 2 surfaces one circle, and with the ground conducting of this pcb board.
Portable terminal of the present invention can be a USB modem class portable terminal.In addition, electric conductor of the present invention can be the single face glue of a strip or the conductive fabric of double faced adhesive tape.Dew copper zone 1a part on the termination applying pcb board of electric conductor 1 is used for USB plug 2 ground connection.This dew copper zone 1a need connect the ground of pcb board, so that paste thereon a termination of the electric conductor on the USB plug.Revealing copper zone 1a partly is a bit of conductive fabric that links to each other for integral type with electric conductor 1.As shown in Figure 7, during USB plug that electric conductor 1 is attached to 2 surfaces, should aim at the original bench mark line.In addition, revealing copper zone 1a size partly just can greater than 6 * 1.5mm.
Below be example as mobile terminal device just with USB modem, specify the present invention.
Modem, Chinese symmetrical modem, because the electromagnetic environment of computer is complicated, for need directly and the USB interface butted U SB Modem mobile terminal device of computer, computer is exactly an interference source.As shown in Figure 1, the front of USB plug 2 " A face " 2a
1And reverse side " A " face " 2a
2, and " the B face " of both sides and " B " face " be relative in twos separately.Learn that by the universal instrument measurement ground of the surface of USB plug 2 and PCB circuit board is conducting, but in four PIN pin 3 of whole USB plug 2, have only a PIN pin by the pad PAD ground connection on the pcb board.
Generally when USB plug 2 is docked with computer USB interface, have more spurious signal near the USB interface of computer equipment is caused electromagnetic interference.And make a large amount of spurious signals by a PIN pin on the USB plug 2 is very limited with being back to, therefore extremely shown in Figure 7 as Fig. 1, adopt earthing device of the present invention, on USB plug 2, enclose electric conductor 1 around one, and make the ground conducting of itself and PCB circuit board, thereby increased the USB plug 2 of portable terminal and the contact area of computer USB interface, improved the antenna performance of USB modem.
Extremely shown in Figure 9 as Fig. 1, the present invention is connected with the USB modem of electric conductor 1, be connected or do not connect under the situation with the ThinkPad T61 of association notebook being in respectively, Shanghai through having radio communication and internet C TIA authentication (Cellular Telecommunications Industry Association) qualification obtains following antenna performance test result with a series of detection that credit test center carries out:
(1) when giving USB modem power supply with lithium battery, the sensitivity of reflection antenna performance GSM124 channel is-102.5dBm.
(2) above-mentioned USB modem is inserted on the ThinkPad T61 notebook tests, the sensitivity of GSM124 channel is-98.9dBm.
(3) twine electric conductor 1 on three faces of the USB plug 2 of USB modem, test, the sensitivity of GSM124 channel is-100.4dBm.
(4) with on the USB plug 2 around a circle electric conductor 1, and make the ground conducting of electric conductor 1 and pcb board, test again, then the sensitivity of GSM124 channel is-102.6dBm.
By above test as can be seen, adopt the scheme of above-mentioned (4), after earthing device promptly of the present invention was handled, the sensitivity of USB modem was obviously risen, and reflects that thus the antenna receptivity of USB modem is significantly improved.
The USB class that the present invention can also be used for other band antenna system need be inserted into the terminal equipment that uses on the computer, and its processing procedure and said method are similar.Mobile terminal grounding device of the present invention can effectively increase the contact area of mobile terminal USB plug, improves USB modem class mobile terminal device antenna receptivity.
Though more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, under the prerequisite that does not deviate from principle of the present invention and essence, can make numerous variations or modification to these execution modes.Therefore, protection scope of the present invention is limited by appended claims.
Claims (9)
1. mobile terminal grounding device, it comprises: the computer of a band USB interface, the portable terminal of one band antenna, this portable terminal has one and is used for the USB plug that is connected with this computer, it is characterized in that, this portable terminal also comprises an electric conductor, and this electric conductor is set around this USB plug outer surface, is used to increase the contact area of this USB plug.
2. mobile terminal grounding device as claimed in claim 1 is characterized in that, an affixed printed circuit board (PCB) in this USB plug.
3. mobile terminal grounding device as claimed in claim 2 is characterized in that, four pads are arranged on this printed circuit board (PCB), and the USB plug of this portable terminal has four pins, and wherein a pin is by a pad ground connection in four pads of this printed circuit board (PCB).
4. mobile terminal grounding device as claimed in claim 2 is characterized in that, this electric conductor twine this USB plug surface one circle and with the ground conducting of this printed circuit board (PCB).
5. mobile terminal grounding device as claimed in claim 1 is characterized in that, this electric conductor is the conductive fabric of single face glue or double faced adhesive tape.
6. mobile terminal grounding device as claimed in claim 1 is characterized in that, this electric conductor be shaped as a strip.
7. mobile terminal grounding device as claimed in claim 2 is characterized in that, this printed circuit board (PCB) is provided with one and reveals the copper zone, and this electric conductor also comprises a termination, and this termination is used for the dew copper zone ground connection of this USB plug is direct and printed circuit board (PCB).
8. mobile terminal grounding device as claimed in claim 7 is characterized in that, this termination and this electric conductor are one of the forming.
9. as any described mobile terminal grounding device in the claim 1 to 8, it is characterized in that this portable terminal is a USB Modem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910044973A CN101772295A (en) | 2009-01-07 | 2009-01-07 | Mobile terminal grounding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910044973A CN101772295A (en) | 2009-01-07 | 2009-01-07 | Mobile terminal grounding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101772295A true CN101772295A (en) | 2010-07-07 |
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ID=42504746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910044973A Pending CN101772295A (en) | 2009-01-07 | 2009-01-07 | Mobile terminal grounding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101772295A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013155803A1 (en) * | 2012-04-19 | 2013-10-24 | 中兴通讯股份有限公司 | Usb interface and terminal |
| CN103595435A (en) * | 2013-10-15 | 2014-02-19 | 深圳市冠旭电子有限公司 | Circuit board with antenna and USB interface and wireless transmitting and receiving device |
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| CN1201280A (en) * | 1997-05-30 | 1998-12-09 | 莫列斯公司 | Electric connector with shielding device |
| CN2377737Y (en) * | 1999-05-28 | 2000-05-10 | 富士康(昆山)电脑接插件有限公司 | Electric connector |
| CN2446681Y (en) * | 2000-09-08 | 2001-09-05 | 陈惟诚 | Connector device |
| CN2651986Y (en) * | 2003-07-15 | 2004-10-27 | 台端兴业股份有限公司 | Casing structure of card connector |
| CN1571623A (en) * | 2004-04-30 | 2005-01-26 | 禾昌兴业股份有限公司 | Flexible circuit board connector capable of preventing interference from electromagnetic wave |
| CN2702468Y (en) * | 2004-03-30 | 2005-05-25 | 金桥科技股份有限公司 | Structure improved connector |
| CN2867652Y (en) * | 2005-11-29 | 2007-02-07 | 建舜电子制造股份有限公司 | Electromagnetic interference elimination structure of connector unit |
| CN101093923A (en) * | 2006-06-23 | 2007-12-26 | 英业达股份有限公司 | Structure of connector |
| CN201112960Y (en) * | 2007-09-03 | 2008-09-10 | 林玉美 | Electric connector capable of eliminating electromagnetic interference |
| US20080311955A1 (en) * | 2007-06-18 | 2008-12-18 | Samsung Electronics Co. Ltd. | Device-adaptive connection establishing method and system for a mobile terminal |
-
2009
- 2009-01-07 CN CN200910044973A patent/CN101772295A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1201280A (en) * | 1997-05-30 | 1998-12-09 | 莫列斯公司 | Electric connector with shielding device |
| CN2377737Y (en) * | 1999-05-28 | 2000-05-10 | 富士康(昆山)电脑接插件有限公司 | Electric connector |
| CN2446681Y (en) * | 2000-09-08 | 2001-09-05 | 陈惟诚 | Connector device |
| CN2651986Y (en) * | 2003-07-15 | 2004-10-27 | 台端兴业股份有限公司 | Casing structure of card connector |
| CN2702468Y (en) * | 2004-03-30 | 2005-05-25 | 金桥科技股份有限公司 | Structure improved connector |
| CN1571623A (en) * | 2004-04-30 | 2005-01-26 | 禾昌兴业股份有限公司 | Flexible circuit board connector capable of preventing interference from electromagnetic wave |
| CN2867652Y (en) * | 2005-11-29 | 2007-02-07 | 建舜电子制造股份有限公司 | Electromagnetic interference elimination structure of connector unit |
| CN101093923A (en) * | 2006-06-23 | 2007-12-26 | 英业达股份有限公司 | Structure of connector |
| US20080311955A1 (en) * | 2007-06-18 | 2008-12-18 | Samsung Electronics Co. Ltd. | Device-adaptive connection establishing method and system for a mobile terminal |
| CN201112960Y (en) * | 2007-09-03 | 2008-09-10 | 林玉美 | Electric connector capable of eliminating electromagnetic interference |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013155803A1 (en) * | 2012-04-19 | 2013-10-24 | 中兴通讯股份有限公司 | Usb interface and terminal |
| CN103595435A (en) * | 2013-10-15 | 2014-02-19 | 深圳市冠旭电子有限公司 | Circuit board with antenna and USB interface and wireless transmitting and receiving device |
| CN103595435B (en) * | 2013-10-15 | 2016-05-11 | 深圳市冠旭电子有限公司 | A kind of wiring board and wireless transmitter with antenna and USB interface |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100707 |