JP2003198694A - Portable terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable terminal device which can be made small in size by combining a call-incoming loudspeaker and a built-in antenna into a single unit. <P>SOLUTION: A call-incoming loudspeaker 3 and an antenna element 2 are combined into a single unit so that the loudspeaker 3 comes into contact with a side surface of a parallel part 2a of the antenna element 2 opposed to a wiring substrate 1. All the surfaces of the loudspeaker 3 not contacted with the antenna element 2 are electromagnetically shielded with a shielding material 5. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a mobile phone, a PDA.
And the like, and more particularly to a mobile terminal device having a built-in antenna in which an antenna is built in a housing.

[0002]

2. Description of the Related Art In recent years, with the spread of mobile terminal devices such as mobile phones, the influence of radio waves radiated from the mobile terminal device on the human body, particularly on the human head of the user (SAR (Specif
ic Absorption Rate)) has been touted. In the mobile terminal device, a high-frequency current is concentrated on the abdomen of the antenna, and as a result, the electromagnetic field is concentrated on the human head near the radiation source such as the antenna feeding point, which is an index of the influence on the human head.
AR will increase. Protective guidelines for such improvement of SAR are being disclosed.

FIG. 8 shows a mounting state of each component of a mobile phone as a mobile terminal device having a built-in antenna. As shown in the figure, the built-in antenna (hereinafter, simply referred to as an antenna) 10 is mounted with each component constituting a mobile phone in order to reduce the influence of the human body (SAR) due to the radio waves radiated from the antenna 10. The printed wiring board 11 is inserted and installed on one surface of the printed wiring board 11 so as to be located on the side opposite to the human head 100 when the mobile phone is used.

That is, the antenna 10 is a speaker for voice 12 from the side close to the human head 100 when using a mobile phone,
The printed wiring boards 11 are installed in this order on the surface of the printed wiring board 11 opposite to the surface on which the audio speaker 12 is installed. Then, on the surface of the printed wiring board 11 on which the audio speaker 12 is installed, the display 13,
A keypad 14, a microphone 15, etc. are installed. Reference numeral 17 is a battery.

Therefore, it is difficult to install the incoming speaker 16 on the surface of the printed wiring board 11 on which the audio speaker 12 is installed, and it is often installed on the same side as the antenna 10.

[0006]

SUMMARY OF THE INVENTION In a conventional mobile terminal device such as a mobile phone in which each component is mounted as described above,
Since a magnetic material used for an incoming call speaker has a large loss in a high frequency region, if the antennas are arranged close to each other, the radiation efficiency of the antennas deteriorates due to the influence. In addition, since there is a battery on the same side as the built-in antenna, there is a problem that if the mobile phone becomes smaller, the built-in antenna and the incoming call speaker will have to be mounted in close proximity to each other.

On the other hand, it is considered that the portable terminal device can be downsized by integrating the incoming call speaker and the built-in antenna, which have less influence on the antenna characteristics. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a portable terminal device that is downsized by integrating a speaker for incoming call and a built-in antenna.

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 is a portable terminal device having a built-in antenna, which is used when a human body is used in a printed wiring board on which various circuits are mounted. It is characterized in that the incoming speaker and the antenna are integrally formed on the surface opposite to the side where it is located.

The invention described in claim 2 is the same as claim 1.
In the mobile terminal device according to, the antenna is formed integrally with the ground terminal, one end of which is connected to the ground portion of the printed wiring board and which is extended in the vertical direction of the printed wiring board. A portion that is orthogonal to the ground terminal and is parallel to the printed wiring board; and a portion that branches off from the middle of the parallel portion, that is parallel to the ground terminal and that extends toward the printed board side, and that connects to the ground portion of the printed board. Has an antenna element having a non-contact power supply terminal, and the power supply terminal constitutes an inverted F-type antenna connected to a high frequency power supply.

Further, the invention according to claim 3 is the same as claim 2
In the portable terminal device according to claim 1, the incoming call speaker and the antenna element are integrally formed so that the incoming call speaker comes into contact with a surface of the antenna element facing the printed wiring board. All surfaces of the incoming speaker that are not in contact with the antenna element are provided with an electromagnetic shield.

The invention described in claim 4 is the same as claim 2
In the portable terminal device according to the item 1, the incoming call speaker and the antenna element are integrally formed so that the incoming call speaker comes into contact with the surface of the antenna element opposite to the surface facing the printed wiring board. It is characterized by having done.

Further, the invention according to claim 5 is the same as claim 2
In the portable terminal device according to the item 1, the incoming call speaker is in contact with the printed wiring board and is fixed between the printed wiring board and the antenna element, and the incoming call speaker is the printed wiring board. The feature is that electromagnetic shielding is applied to all surfaces not in contact with.

The invention according to claim 6 is the same as claim 1.
In the mobile terminal device according to any one of 1 to 5, a low-pass filter that blocks a high-frequency signal is provided between the incoming call speaker and a circuit unit mounted on the printed wiring board connected to the incoming call speaker. Or connect via
Alternatively, it is characterized by connecting with a high impedance line.

According to a seventh aspect of the present invention, there is provided a portable terminal device having a built-in antenna, wherein a printed wiring board on which various circuits are mounted is used for incoming calls on the surface opposite to the side on which the human body is located. The speaker or the vibrator and the antenna are formed so as to be integrated.

The invention according to claim 8 is a portable terminal device having a built-in antenna, which is used for receiving an incoming call on a surface of a printed wiring board on which various circuits are mounted, on the side opposite to the side on which the human body is located. The speaker, the vibrator, and the antenna are formed so as to be integrated with each other.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. A mobile terminal device according to each of the embodiments of the present invention is a mobile terminal device having a built-in antenna, and is used for receiving an incoming call on a surface of a printed wiring board on which various circuits are mounted, on a side opposite to a side where a human body is located. The speaker and the antenna (built-in antenna) are integrally formed.

FIG. 1 shows a mounting state of the built-in antenna and the incoming call speaker in the portable terminal device according to the first embodiment of the present invention. In the figure, reference numeral 1 is a printed wiring board, and one end of the built-in antenna is connected to a ground portion (not shown) of the printed wiring board 1 and a ground terminal 2b extending in the vertical direction of the printed wiring board 1. The printed wiring board 1 is formed integrally with the ground terminal 2b and is orthogonal to the ground terminal 2b.
A portion 2a that is parallel to the ground portion 2a, and a power supply terminal 2c that is branched from the middle of the parallel portion 2a, is parallel to the ground terminal 2b, and extends toward the printed circuit board 1 side, and does not contact the ground portion of the printed circuit board 1. The antenna element 2 is included.

The feeding terminal 2c is connected to the high frequency power source 4 and the feeding point 20 of the antenna element 2, and the built-in antenna constitutes an inverted F type antenna. Here, the length of the antenna element 2 including the ground terminal 2b and the parallel portion 2a is set to, for example, λ / 4, where λ is the wavelength of the radio wave transmitted and received by the mobile terminal device.

Further, as shown in FIG. 1, the incoming call speaker 3 and the antenna element 2 are arranged so that the incoming call speaker 3 is in contact with the surface of the parallel portion 2a of the antenna element 2 facing the printed wiring board 1. While being integrally formed, all surfaces of the incoming speaker 3 that are not in contact with the antenna element 2 are electromagnetically shielded by the shield material 5.

If the structure of the incoming call speaker 3 is covered with an outer conductor, the shield material 5 is not necessary. The shield structure is applied to the incoming call speaker 3 only when the speaker 3 is not covered. In this embodiment, the outer conductor covering the incoming speaker 3 or the shield material 5 is used as a part of the antenna element. Generally, in an antenna having a printed wiring board (ground plate), magnetic flux concentrates between the antenna element and the printed wiring board. Therefore, when a magnetic material having a loss is arranged at the magnetic flux concentration point, the radiation efficiency of the antenna is particularly deteriorated. However, by configuring as described above, high frequency loss due to the magnetic material configuring the incoming call speaker 3 is avoided. As a result, the built-in antenna and the speaker 3 for incoming call can be integrated, and hence the portable terminal device can be downsized.

When the front surface of the incoming call speaker 3, which is the sound outlet, is shielded, the use of a metal net provides acoustically satisfactory characteristics. In addition, the speaker 3 for incoming calls
And a circuit portion mounted on the printed wiring board 1 connected to the incoming speaker 3 via a low-pass filter for blocking a high frequency signal in order to reduce the influence of the high frequency signal radiated from the antenna. Connect with high impedance line.

Next, FIG. 2 shows a mounting state of the built-in antenna and the incoming speaker in the portable terminal device according to the second embodiment of the present invention. The mobile terminal device according to the present embodiment is different from the mobile terminal device according to the first embodiment in configuration only in the arrangement position of the incoming call speaker and the presence / absence of a shield structure, and other configurations are in the first embodiment. Since it is the same as the form, duplicate description is omitted. 2, in the mobile terminal device according to the present embodiment, the incoming call speaker 3 has the printed wiring board 1 in the parallel portion 2 a of the antenna element 2.
The incoming call speaker 3 and the antenna element 2 are integrally formed so as to come into contact with the surface on the side opposite to the side facing.

Since the magnetic flux concentration point is between the antenna element 2 and the printed wiring board 1, according to this embodiment, the parallel portion 2a of the antenna element 2 is on the upper side (on the side opposite to the printed wiring board 1) in the drawing. By arranging the incoming call speaker 3 in the
High frequency loss due to the magnetic material of the built-in antenna is reduced.
Further, in the example shown in FIG. 2, although the speaker 5 for incoming call does not shield the surface which is not in contact with the antenna element 2, it can be used sufficiently, but it does not contact the antenna element 2 of the speaker 5 for incoming call. High-frequency loss can be almost completely avoided by using a shield structure on the uncovered surface.

In addition, between the speaker 3 for incoming call and the circuit portion mounted on the printed wiring board 1 connected to the speaker 3 for incoming call, a high frequency signal is emitted in order to reduce the influence of the high frequency signal radiated from the antenna. Connect via a low-pass filter that blocks signals, or connect with a high impedance line.

Next, FIG. 3 shows a mounting state of the built-in antenna and the incoming speaker in the mobile terminal device according to the third embodiment of the present invention. The mobile terminal device according to the present embodiment is different from the mobile terminal device according to the first embodiment in configuration, only the arrangement position of the incoming call speaker is different, and other configurations are the same as those in the first embodiment. , Duplicate description will be omitted.

In FIG. 3, in the portable terminal device according to this embodiment, the incoming call speaker 3 is in contact with the printed wiring board 1 and fixed between the printed wiring board 1 and the antenna element 2. Further, all the surfaces of the incoming call speaker 3 that are not in contact with the printed wiring board 1 are electromagnetically shielded by the shield material 5.

In the present embodiment, the incoming call speaker 3 is arranged on the printed wiring board 1 side of the antenna, but by using a shield structure, high frequency loss can be avoided.
If the antenna element 2 acoustically blocks the incoming call speaker 3, the antenna element 2 portion above the incoming call speaker 3 is made of a metal net,
It is possible to improve the acoustic characteristics.

4 and 5 show an example of the mounting structure of the built-in antenna and the incoming call speaker in the portable terminal device according to the first embodiment of the present invention shown in FIG. FIG. 4 is a perspective view showing a mounting structure of the built-in antenna and the incoming call speaker, and FIG. 5 is a front view thereof. 4 and 5,
The same components are designated by the same reference numerals.

FIG. 6 shows the efficiency of the built-in antenna integrated with the incoming call speaker and the incoming call speaker 3 when the incoming call speaker 3 is installed at the positions shown in FIGS.
The ratio with the efficiency of the built-in antenna when is not near the built-in antenna is calculated as a deterioration rate by simulation,
It is shown by comparison. The built-in antenna with a built-in speaker for incoming calls (not shielded) is the incoming antenna 3
2 is in the position of FIG. 2, the efficiency of the antenna does not deteriorate,
It can be seen that the positions shown in FIGS. 1 and 3 have deteriorated.

However, when the incoming call speaker 3 is surrounded by the shield material, the efficiency improvement rate of the antenna is as shown in FIG. That is, it is understood that by enclosing the incoming call speaker 3 with the shield material, the efficiency of the antenna is improved, and the performance equal to or higher than the efficiency of the antenna when the incoming call speaker is not near the built-in antenna can be obtained.

When the portable terminal device is downsized, it is necessary to integrate the incoming call speaker and the built-in antenna. In the configuration of the mobile terminal device according to the second embodiment shown in FIG. 2, the efficiency does not deteriorate even if the incoming call speaker 3 is not provided with an electromagnetic shield. However, the first and the third shown in FIGS.
Even in the configuration of the mobile terminal device according to the embodiment, if the electromagnetic wave shield is applied to the incoming call speaker 3, the efficiency of the antenna can be improved, which can be said to be an effective improvement method.

Although the mobile terminal device according to each of the above embodiments is configured to integrate the incoming speaker and the built-in antenna, the present invention is not limited to this, and the incoming speaker or vibrator and the built-in antenna are included in each of the above embodiments. The antenna may be integrated, or the incoming speaker, the vibrator, and the built-in antenna may be integrated. Even with this configuration, the same effects as the effects of the above-described embodiments can be obtained.

[0033]

As described above, according to the present invention, in the portable terminal device having the built-in antenna, the surface of the printed wiring board on which various circuits are mounted is opposite to the side on which the human body is located during use. Since the incoming call speaker and the antenna are formed integrally with each other, the portable terminal device can be downsized. Further, when the incoming speaker and the antenna are integrated, the incoming speaker is provided with an electromagnetic shield, so that the deterioration of the antenna efficiency can be prevented.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a mounted state of a built-in antenna and a call-receiving speaker in a mobile terminal device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a mounting state of a built-in antenna and a call-receiving speaker in a mobile terminal device according to a second embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a mounted state of a built-in antenna and a call-receiving speaker in a mobile terminal device according to a third embodiment of the present invention.

FIG. 4 is a perspective view showing an example of a mounting structure of a built-in antenna and an incoming call speaker in the mobile terminal device according to the first embodiment of the present invention.

FIG. 5 is a front view showing an example of a mounting structure of a built-in antenna and an incoming call speaker in the mobile terminal device according to the first embodiment of the present invention.

FIG. 6 shows the efficiency of the built-in antenna integrated with the incoming call speaker when the incoming call speaker is installed at each position shown in FIGS. 1, 2, and 3 and the built-in antenna when the incoming call speaker is not near the internal antenna. Calculate the ratio with efficiency as the deterioration rate,
The figure shown in comparison.

FIG. 7 is a comparison of the efficiency improvement rates of the built-in antenna for an incoming call speaker when an electromagnetic shield is applied to the incoming call speaker when the incoming call speaker is installed at each position shown in FIGS. 1, 2 and 3. The figure shown.

FIG. 8 is an explanatory view showing a mounting structure of a conventional mobile terminal device.

[Explanation of symbols]

1 ... Printed wiring board 2 ... Antenna element 2a ... Parallel part 2b ... Ground terminal 2c ... Power supply terminal 3 ... Incoming speaker 4 ... High frequency power supply 5 ... Shield material

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Minoru Hasegawa             2-7 Sugasawa-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Stock             Samsung Electronics Laboratory Electronics Research Laboratory F term (reference) 5J045 AB05 DA08 NA03                 5J046 AA07 AB13 SA00 UA08                 5K023 AA07 BB03 EE07 HH05 HH10                       LL01 LL05

Claims (8)

[Claims] 1. A portable terminal device having a built-in antenna, wherein a call-in speaker and an antenna are integrated on a surface of a printed wiring board on which various circuits are mounted, the surface being opposite to a side on which a human body is located. A mobile terminal device, characterized in that 2. The ground terminal, wherein one end of the antenna is connected to a ground portion of the printed wiring board and extends in the vertical direction of the printed wiring board; and the antenna is integrally formed with the ground terminal. A portion that is orthogonal to the printed wiring board and that is parallel to the printed wiring board, branches from the middle of the parallel portion, is parallel to the ground terminal, and extends to the printed board side, and does not contact the ground portion of the printed board. The mobile terminal device according to claim 1, further comprising an antenna element having a power supply terminal, wherein the power supply terminal constitutes an inverted F-type antenna connected to a high frequency power supply. 3. The incoming call speaker and the antenna element are integrally formed so that the incoming call speaker comes into contact with a surface of the parallel portion of the antenna element facing the printed wiring board. The mobile terminal device according to claim 2, wherein all surfaces of the incoming speaker that are not in contact with the antenna element are electromagnetically shielded. 4. The incoming call speaker and the antenna element are integrally formed so that the incoming call speaker contacts the surface of the antenna element opposite to the side facing the printed wiring board. The mobile terminal device according to claim 2, which is characterized in that. 5. The incoming call speaker is in contact with the printed wiring board, and is fixed between the printed wiring board and the antenna element, and the incoming call speaker is in contact with the printed wiring board. The mobile terminal device according to claim 2, wherein an electromagnetic shield is applied to all the surfaces that are not provided. 6. The incoming call speaker and a circuit section mounted on the printed wiring board connected to the incoming call speaker are connected via a low-pass filter that blocks high-frequency signals, or a high-pass filter is provided. The mobile terminal device according to claim 1, wherein the mobile terminal device is connected by an impedance line. 7. A mobile terminal device having a built-in antenna, wherein a speaker for incoming call or vibrator and an antenna are integrally formed on a surface of a printed wiring board on which various circuits are mounted, the surface being opposite to the side on which the human body is located. A mobile terminal device, characterized in that 8. A portable terminal device having a built-in antenna, wherein a speaker for incoming call, a vibrator, and an antenna are integrated on a surface of a printed wiring board on which various circuits are mounted, the surface being opposite to the side on which the human body is located when used. A mobile terminal device characterized by being formed as follows.