CN1481183A

CN1481183A - Mobile phone with low radiation

Info

Publication number: CN1481183A
Application number: CNA021318506A
Authority: CN
Inventors: 吴裕源; 彭奂喆; 施凯
Original assignee: Quanta Computer Inc
Current assignee: Quanta Computer Inc
Priority date: 2002-09-06
Filing date: 2002-09-06
Publication date: 2004-03-10
Anticipated expiration: 2022-09-06
Also published as: CN1275486C

Abstract

The mobile phone includes a case, a circuit device inside the case. The circuit device includes a circuit board and an antenna connected to the circuit board electrically for receiving and transmitting wireless signal. The circuit device also includes a conductive part. The two ends of the conductive part are formed a ground terminal and an open end. The ground terminal is connected to ground loop of the circuit board electrically, making the open end and the antenna form own independent electromagnetic radiation emission source with reduced penetrating strength in order to lower influence on users caused by integral magnetism radiation.

Description

Mobile phone with low radiation

Technical field

The invention relates to a kind of mobile phone handsets, be meant a kind of mobile phone handsets that reduce electromagnetic radiation to user's influence especially.

Background technology

Because the convenience on mobile phone uses, its popularity rate is the situation of every one can have a machine almost, and utilize the mobile phone of radio magnetic wave with transmitting signals, in order to reach the purpose of effective communication, the electromagenetic wave radiation that it produced all has certain intensity, and its emission source concentrates on the antenna place, though and the electromagnetic radiation of the proof mobile phone that medically lacks confirmation so far is the main cause that causes some specified disease, but verified its still has to a certain degree influence to human body, therefore in the design of mobile phone now, the consideration on the reception performance, how more necessary consideration simultaneously makes the electromagnetic radiation of mobile phone can reduce to minimum for the influence of human body.

And generally measure electromagnetic radiation to the influence of human body with " specific absorption rate " (SAR, SpecificAbsorption Rate) value as a comparison, with the FCC standard, mobile phone is qualified near the SAR value of near field (Near Field) intensity of human body to be lower than 1.6mw/gm.So in order to reach this standard, the general classification of way in the past has following three kinds of kenels:

One, reduce power: by the input power of reduction mobile phone handsets, make the transmitted intensity of electromagnetic radiation reduce, this is the most direct mode of reduction electromagnetic radiation SAR value, but so promptly must be to the reception performance work sacrifice to a certain degree of mobile phone.

Two, make resonant frequency shift: utilize the selection of antenna length, make the resonance frequency of antenna have small departure with the frequency of corresponding wireless signal, can therefore make electromagnetic radiation intensity reduce, but the shortcoming of this kind way will make the receiving loop deleterious of mobile phone and influence reception.

Three, change outward appearance: this kind mode is that the emission source that directly mobile phone is produced electromagnetic radiation is configured in from user position at a distance, though it can reach the purpose that electromagnetic radiation reduces with respect to the human body near field intensity, but its result will make the size of mobile phone handsets increase, all ask under the compact market demands for mobile phone handsets now, this kind way will make product lack market competitiveness.

Summary of the invention

Therefore, purpose of the present invention is promptly providing a kind of existing reception performance and can reduce the mobile phone handsets of electromagnetic radiation to the human influence simultaneously kept.

So mobile phone with low radiation of the present invention is to comprise a housing and to be placed in the interior circuit arrangement of housing, circuit arrangement comprises that then a circuit board and electrically connects the antenna of circuit board with the transmitting/receiving wireless signal.This circuit arrangement more comprises a conducting piece, the conducting piece two ends form an earth terminal and an open end respectively, the grounded circuit of earth terminal and circuit board electrically connects, make open end and antenna form the electromagnetic radiation emission that independence separately and transmitted intensity reduce respectively, to reduce the influence of whole electromagnetic radiation to the user.

Description of drawings

Technology contents of the present invention, feature and advantage in following cooperation DETAILED DESCRIPTION OF THE PREFERRED with reference to the accompanying drawings, can clearly present, in the accompanying drawings:

Fig. 1 is a preferred embodiment organigram of mobile phone with low radiation of the present invention;

Fig. 2 is the circuit arrangement structure side schematic view of the preferred embodiment;

Fig. 3 is an electromagnetic radiation intensity distribution schematic diagram, illustrates that the distribution of electromagnetic intensity when not being provided with a conducting piece concentrates on the state of the position of antenna; And

Fig. 4 is another electromagnetic radiation intensity distribution schematic diagram, illustrates that the preferred embodiment has the state of two electromagnetic radiation emission.

The element numbers contrast

1 housing, 22 antennas

11 upper cover body, 23 LCD Panel

12 lower covers, 24 conducting pieces

2 circuit arrangements, 241 earth terminals

21 circuit boards, 242 open ends

211 earth points

Embodiment

Consult Fig. 1 and Fig. 2, one preferred embodiment of mobile phone with low radiation of the present invention is textural roughly similar with traditional mobile phone handsets, it includes a housing 1, housing 1 is a upper cover body 11 and a lower cover 12 involutory formations, make the place, inboard of lower cover 12 be positioned with a circuit arrangement 2, upper cover body 11 is combined with lower cover 12, make circuit arrangement 2 be placed in the housing 1, circuit arrangement 2 then comprises a circuit board 21, one end of circuit board 21 is provided with an antenna 22 that is electrically connected on the circuit board 21 with the transmitting/receiving wireless signal, in addition, also can be provided with one on the circuit board 21 in order to show the small liquid crystal display screen (LCD) 23 of information.

And different with traditional mobile phone handsets be in, circuit arrangement 2 more includes a conducting piece 24, in this example, conducting piece 24 is bent to form by a metal wire, make conducting piece 24 two ends form an earth terminal 241 and an open end 242 respectively, wherein, earth terminal 241 is to electrically connect with the grounded circuit of circuit board 21.In the configuration of reality, the earth terminal 241 of conducting piece 24 can be welded in an earth point 211 of circuit board 21 in advance and electrically connect with grounded circuit, make conducting piece 24 be assembled in the inboard of lower cover 12 earlier along with circuit board 21, again because of the combination of upper cover body 11 in the inside of housing 1, in addition, also can make conducting piece 24 adhere to the inboard that is positioned at upper cover body 11 in advance, after upper cover body 11 and lower cover 12 make up, the earth terminal 241 that makes conducting piece 24 electrically contacts with earth point 211 generations on the circuit board 21 in the mode of contact, whereby with the grounded circuit conducting.

Simultaneously with reference to Fig. 1, Fig. 3 and Fig. 4, when mobile phone handsets use, because of the earth terminal 241 of conducting piece 24 is electrically connected on the earth point 211 of circuit board 21, make the kenel in integral ground loop produce change, and cause conducting piece 24 to form the emission source of an electromagnetic radiation as existing antenna 22, electromagnetic radiation is launched by the open end 242 of conducting piece 24, so, the electromagnetic radiation emission of whole mobile phone handsets can be divided into two places, one place is existing antenna 22, another place then is a conducting piece 24, and under the constant prerequisite of the power output of mobile phone handsets, the electromagnetic radiation intensity that makes the transmitted intensity of electromagnetic radiation of conducting piece 24 and antenna 22 positions all more in the past concentrate on the single antenna position has the phenomenon of reduction, according to practical test result, as Fig. 3, conducting piece 24 be not set, antenna 22 is under the situation of unique electromagnetic radiation emission, the SAR value is 1.8mw/gm, and as Fig. 4, conducting piece 24 is being set, electromagnetic radiation emission is divided into 24 liang of antenna 22 and conducting pieces locate after, whole SAR value can be reduced to 1.2～1.3mw/gm, therefore can significantly reduce the influence of electromagnetic radiation for the user under the situation that mobile phone handsets reception ability is not lost.

In addition, mobile phone handsets at different apparent sizes, on the length of suitable selection conducting piece 24 and the circuit board 21 in order to the selection of earth point 211 positions that are connected with the earth terminal 241 of conducting piece 24, applicable to multi-form mobile phone handsets, and it is minimum to make the SAR value all can reduce to.

The above person, only be the preferred embodiments of the present invention, can not limit scope of the invention process with this, promptly the simple equivalent of being done according to claim of the present invention and description of the invention content generally changes and modifies, and all should still belong in the scope that patent of the present invention contains.

Claims

1. mobile phone with low radiation, this mobile phone include a housing and and are placed in circuit arrangement in this housing, and this circuit arrangement comprises that then a circuit board and electrically connects the antenna of this circuit board with the transmitting/receiving wireless signal, is characterized in that:

This circuit arrangement more comprises a conducting piece, these conducting piece two ends form an earth terminal and an open end respectively, this earth terminal then electrically connects with the grounded circuit of this circuit board, make this open end and this antenna form independence and the less electromagnetic radiation emission of transmitted intensity separately respectively, to reduce the influence of whole electromagnetic radiation to the user.

2. mobile phone with low radiation as claimed in claim 1, wherein, this conducting piece is a metal wire.

3. mobile phone with low radiation as claimed in claim 1, wherein, the earth terminal of this conducting piece is the grounded circuit electric connection with welding manner and this circuit board.

4. mobile phone with low radiation as claimed in claim 1, wherein, this conducting piece is to be attached on this housing, and the earth terminal of this call wire is electrically connected with the mode of contact and the grounded circuit of this circuit board.