WO2011155190A1 - Mobile wireless device - Google Patents

Abstract

Disclosed is a mobile wireless device which can execute a plurality of wireless applications despite being small and thin. A second power supply section (9) supplies power to an external conductor (53) of a first coaxial cable (5) by using the external conductor (53) of the first coaxial cable (5) which electrically connects a first power supply section (4) and a first antenna element (7). The external conductor (53) is used as a monopole antenna corresponding to the second power supply section (9), by connecting one end of the external conductor (53) to a ground pattern of a first circuit board (2) by way of a first reactance element (12) and connecting the other end of the external conductor (53) to the ground pattern of the first circuit board (2) by way of a second reactance element (13). It is therefore possible to execute two wireless applications without increasing the number of antennas.

Description

Portable radio

The present invention particularly relates to a portable wireless device capable of executing a plurality of wireless applications such as GPS (Global Positioning System), short-range wireless communication, wireless LAN (Local Area Network), and television.

Recent portable wireless devices require a large number of antenna elements by installing multiple wireless applications. Furthermore, with the advent of input devices such as a touch panel, the liquid crystal display unit and the operation unit can be used as a single device, and the number of portable wireless devices including only the first housing is increasing. Also, antenna elements are often built in.

In that case, a coaxial cable may be used to feed power from the radio unit to the antenna element in order to effectively use the free space in the housing.

In addition, the arrangement of antenna elements in a foldable portable wireless device in which an upper housing and a lower housing are connected so as to be openable / closable is equipped with a liquid crystal display unit in consideration of performance and usage scenes required for wireless applications. In addition, an upper case may be desirable. An example of this application is GPS.

On the other hand, since the battery occupies a large proportion of the size of the device main body, it is often arranged in a lower casing separate from the liquid crystal display unit. When the battery is arranged in the lower casing, the radio unit is often arranged in the lower casing. When the wireless unit is disposed in the lower housing, a coaxial cable is often used for feeding power to the antenna element disposed in the upper housing.

In addition, when using a coaxial cable, this is used for electric power feeding to an existing conductor, the proposal which operates an existing conductor and a coaxial cable as an antenna (for example, refer to patent documents 1), and a part of coaxial cable replaces a microstrip line. There is a proposal (see, for example, Patent Document 2) that controls unwanted radiation.

Japanese Unexamined Patent Publication No. 2006-086875 Japanese Laid-Open Patent Publication No. 2007-088864

By the way, recent portable wireless devices have a problem that the number of antennas is increased by mounting a plurality of wireless applications, which prevents the portable wireless device itself from being reduced in size and thickness.

The present invention has been made in view of such circumstances, and an object thereof is to provide a portable wireless device capable of mounting a plurality of wireless applications while achieving a reduction in size and thickness.

The portable wireless device of the present invention is a portable wireless device including a first casing, and a first circuit board provided in the first casing and a first circuit board provided in the first circuit board. A wireless unit, a second wireless unit provided on the first circuit board, a first power supply unit that supplies power from the first wireless unit, and power supplied from the second wireless unit A second power feeding unit, an antenna element provided in the first housing, and a coaxial cable that electrically connects the first power feeding unit and the antenna element, the coaxial cable, A conductive core wire and a conductive outer conductor around the core wire, wherein the first power feeding portion feeds power to the coaxial cable core wire, and the second power feeding portion is connected to the coaxial cable. Power is supplied to the outer conductor, and one end of the outer conductor is connected to the first reactor. Connected to the ground pattern of the first circuit board via a Nsu element, the other end portion of the outer conductor is connected to the ground pattern of the first circuit board through the second reactance element.

According to the above configuration, since the conductive outer conductor around the conductive core wire of the coaxial cable is used as a monopole antenna for the second feeding portion, it is possible to reduce the size and thickness without increasing the number of antennas. In addition, two wireless applications by the first wireless unit and the second wireless unit can be executed.

Furthermore, the portable wireless device of the present invention is a portable wireless device in which a first housing and a second housing are connected so as to be openable and closable, and a first circuit board provided in the first housing; A second circuit board provided in the second casing, a first radio unit provided in the first circuit board, and provided in either the first circuit board or the second circuit board A second radio unit, a first power supply unit that supplies power from the first radio unit, a second power supply unit that supplies power from the second radio unit, and the second power unit An antenna element provided in a housing; and a coaxial cable that electrically connects the first power feeding unit and the antenna element. The coaxial cable includes a conductive core wire and a conductive wire around the core wire. And the first feeding part is a core of the coaxial cable. The second power feeding section feeds power to the outer conductor of the coaxial cable, and one end of the outer conductor is connected to the ground pattern of the first circuit board via the first reactance element. The other end of the external conductor is connected to the ground pattern of the second circuit board via a second reactance element.

According to the above configuration, even in a portable wireless device with a folding structure, two wireless applications by the first wireless unit and the second wireless unit are executed without increasing the number of antennas, that is, while reducing the size and thickness. Can do.

It should be noted that by connecting the other end of the outer conductor of the coaxial cable directly to the ground pattern of the second circuit board, the outer conductor of the coaxial cable can also be used as a dipole antenna for the second feeder.

Further, in the above configuration, a hinge portion that rotatably connects the first housing and the second housing is provided, and the hinge portion includes a conductive rotation portion, The coaxial cable is separated from the rotating part by a predetermined distance or more.

According to the above configuration, the influence of the conductive rotating portion on the coaxial cable can be reduced by separating the coaxial cable and the rotating portion by a predetermined distance or more. In addition, about 1/15 or more of use frequency (lambda) is preferable as distance which separates a coaxial cable and a rotation part.

In the present invention, since the conductive outer conductor around the conductive core wire of the coaxial cable is used as an antenna for the second feeding portion, a plurality of antennas can be obtained without increasing the number of antennas, that is, while reducing the size and thickness. Wireless applications can be installed.

1 is a block diagram showing a schematic configuration of a portable wireless device according to Embodiment 1 of the present invention. Longitudinal section showing the structure of coaxial cable FIG. 3 is a block diagram showing a schematic configuration of a portable wireless device according to the second embodiment of the present invention. The figure for demonstrating the distance relationship between the rotation part of a hinge part, and a coaxial cable FIG. 3 is a block diagram showing a schematic configuration of a portable wireless device according to Embodiment 3 of the present invention. The figure which shows the electric current distribution on the 1st circuit board and the 2nd circuit board at the time of operation | movement of the portable radio | wireless machine which concerns on Embodiment 3 of this invention.

Hereinafter, preferred embodiments for carrying out the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing a schematic configuration of a portable radio apparatus according to Embodiment 1 of the present invention. In the figure, a portable wireless device 101 of the present embodiment is a portable wireless device configured with a single casing.

The portable wireless device 101 is provided with a first circuit board 2, a battery 11, and a first antenna element 7. A first power supply unit 4 to be described later is mounted on the first circuit board 2, and the first power supply unit 4 is electrically connected to the first antenna element 7 by the first coaxial cable 5. Yes. The coaxial cable 5 is used for radio signal transmission. As shown in the longitudinal sectional view of FIG. 2, the coaxial cable 5 includes a conductive core wire 51, a dielectric 52, a conductive outer conductor 53, and an insulating outer sheath 54. It has a stacked structure.

The first circuit board 2 includes a first wireless unit (RF 1) 3, a first power feeding unit 4 that supplies power from the first wireless unit 3 to the first antenna element 7, and a second wireless unit. A second power feeding unit 9 for supplying power from the unit (RF2) 8 and the second radio unit 8 to the outer conductor 53 of the first coaxial cable 5, and the second power feeding unit 9 and the first coaxial cable 5 The first matching circuit 10 that performs impedance matching with the outer conductor 53, the band-pass filter 15 that removes unnecessary components of the signal handled by the second radio unit 8, and the outer conductor of the first coaxial cable 5 The second reactance element 13 that connects one end of the first circuit board 2 to the ground pattern of the first circuit board 2 and the other end of the outer conductor 53 of the first coaxial cable 5 are connected to the first circuit board 2. A first reactance element 12 connected to the ground pattern; A second matching circuit 6 that performs impedance matching between the power feeding unit 4 and the first antenna element 7 and a bandpass filter 14 that removes unnecessary components of the signal handled by the first radio unit 3 are mounted. Yes. As the first reactance element 12 and the second reactance element 13, a combination of a capacitor and a coil is desirable.

The first power feeding unit 4 feeds power to the core wire 51 of the first coaxial cable 5, and the second power feeding unit 9 feeds power to the outer conductor 53 of the first coaxial cable 5. One end of the outer conductor 53 of the first coaxial cable 5 is connected to the ground pattern of the first circuit board 2 via the first reactance element 12, and the other end of the outer conductor 53 is the second end. It is connected to the ground pattern of the first circuit board 2 via the reactance element 13, and the external conductor 53 functions as a monopole antenna for the second radio unit 8.

The first wireless unit 3 executes a first wireless application (for example, reception of a positioning signal transmitted from a GPS satellite), and the second wireless unit 8 performs a second wireless application (for example, short-range wireless). (Communication wireless transmission / reception, wireless LAN transmission / reception or television broadcast reception). The 1st radio | wireless part 3 and the 2nd radio | wireless part 8 can be used simultaneously except when the use frequency of each other is close. The case where the frequencies used are close to each other includes, for example, short-range wireless communication and wireless LAN. Both use the 2.4 GHz band. *

In the portable wireless device 101 having such a configuration, the first radio unit 3 transmits and receives radio signals from the first antenna element 7, and the second radio unit 8 is an outer conductor of the first coaxial cable 5. Radio signals are transmitted and received using 53 as an antenna.

As described above, according to the portable wireless device 101 of the present embodiment, the outer conductor 53 of the first coaxial cable 5 that electrically connects the first feeding unit 4 and the first antenna element 7 is used. The second feeder 9 feeds power to the outer conductor 53 of the first coaxial cable 5, and one end of the outer conductor 53 is connected to the ground pattern of the first circuit board 2 via the first reactance element 12. Connect the other end of the external conductor 53 to the ground pattern of the first circuit board 2 via the second reactance element 13, and use the external conductor 53 as a monopole antenna for the second power supply unit 9. Since it is used, two wireless applications by the first wireless unit 3 and the second wireless unit 8 can be executed without increasing the number of antennas, that is, while reducing the size and thickness.

(Embodiment 2)
FIG. 3 is a block diagram showing a schematic configuration of the portable wireless device according to the second embodiment of the present invention. 3 that are the same as those of the portable wireless device 101 of FIG.

The above-described portable wireless device 101 according to the first embodiment is used as a portable wireless device including a first casing called a straight type, but the portable wireless device 201 according to the second embodiment is a foldable type. A portable wireless device in which a lower housing and an upper housing are connected so as to be openable and closable. .

The lower housing 203 of the portable wireless device 201 is provided with the first circuit board 2 and the battery 11, and the upper housing 202 is provided with the second circuit board 207 and the second antenna element 212. . The first power supply unit 4 is mounted on the first circuit board 2, and the first power supply unit 4 includes a second antenna element 212 provided on the upper portion of the upper housing 202 and a second coaxial cable. 206 is electrically connected. The second coaxial cable 206 is used for wireless signal transmission.

The first circuit board 2 of the lower housing 203 includes a first radio unit 3, a first power feeding unit 4 that supplies power from the first radio unit 3 to the second antenna element 212, The second radio unit 8, the second power supply unit 9 that supplies power from the second radio unit 8 to the outer conductor 53 of the second coaxial cable 206, and the second power supply unit 9 and the second coaxial cable A third matching circuit 208 that performs impedance matching with the outer conductor 53 of the 206, a band-pass filter 209 that removes unnecessary components of the signal handled by the second radio unit 8, and an external of the second coaxial cable 206 A first reactance element 12 that connects one end of the conductor 53 to the ground pattern of the first circuit board 2 is mounted. The band pass filter 209 is provided between one end of the outer conductor 53 of the second coaxial cable 206 and the third matching circuit 208.

The second circuit board 207 of the upper housing 202 includes a fourth matching circuit 210 that performs impedance matching between the first power feeding unit 4 and the second antenna element 212, and the first wireless unit 3. A band-pass filter 211 that removes unnecessary components of the signal to be handled, and a third reactance element 213 that connects the other end of the outer conductor 53 of the second coaxial cable 206 to the ground pattern of the second circuit board 207. Has been implemented.

The first power supply unit 4 supplies power to the core wire 51 of the second coaxial cable 206, and the second power supply unit 9 supplies power to the outer conductor 53 of the second coaxial cable 206. One end of the outer conductor 53 of the second coaxial cable 206 is connected to the ground pattern of the first circuit board 2 via the first reactance element 12, and the other end of the outer conductor 53 is the third end. It is connected to the ground pattern of the second circuit board 207 via the reactance element 213, and the external conductor 53 functions as a monopole antenna for the second radio unit 8.

A hinge portion 204 that rotatably connects the lower housing 203 and the upper housing 202 has a conductive rotation portion 205. When the rotating unit 205 is connected to the ground pattern of the first circuit board 2 and the ground pattern of the second circuit board 207, the second conductor 53 of the second coaxial cable 206 is not affected. The coaxial cable 206 and the rotation unit 205 are arranged apart from each other by a predetermined distance (1/15 distance from the use frequency λ). FIG. 4 shows the positional relationship between the second coaxial cable 206 and the rotation unit 205.

In the portable radio 201 having such a configuration, the first radio unit 3 transmits and receives radio signals from the second antenna element 212 provided in the upper housing 202, and the second radio unit 8 Radio signals are transmitted and received using the outer conductor 53 of the second coaxial cable 206 as an antenna.

As described above, according to the portable wireless device 201 of the present embodiment, the outer conductor 53 of the second coaxial cable 206 that electrically connects the first feeding unit 4 and the second antenna element 212 is used. The second power feeding unit 9 feeds power to the outer conductor 53 of the second coaxial cable 206, and one end of the outer conductor 53 is connected to the ground pattern of the first circuit board 2 via the first reactance element 12. The other end of the external conductor 53 is connected to the ground pattern of the second circuit board 207 via the third reactance element 213, and the external conductor 53 is used as a monopole antenna for the second power supply unit 9. Since it is used, two wireless applications by the first wireless unit 3 and the second wireless unit 8 can be executed without increasing the number of antennas, that is, while reducing the size and thickness.

(Embodiment 3)
FIG. 5 is a block diagram showing a schematic configuration of the portable wireless device according to the third embodiment of the present invention. In FIG. 5, parts common to the portable wireless device 201 in FIG.

The portable wireless device 201 of the second embodiment described above connects the other end of the outer conductor 53 of the second coaxial cable 206 to the ground pattern of the second circuit board 207 via the third reactance element 213. Thus, although the outer conductor 53 of the second coaxial cable 206 is used as a monopole antenna for the second power feeding unit 9, the portable wireless device 301 according to the third embodiment is connected to the outside of the second coaxial cable 206. The other end of the conductor 53 is directly connected to the ground pattern of the second circuit board 207, and the outer conductor 53 of the second coaxial cable 206 is used as a dipole antenna for the second power feeding section 9. It is.

FIG. 6 shows the current distribution on the first circuit board 2 and the second circuit board 207 when the outer conductor 53 of the second coaxial cable 206 is used as a dipole antenna for the second power feeding unit 9. The current flows in the direction indicated by the arrow.

As described above, since the outer conductor 53 of the second coaxial cable 206 is used as a dipole antenna for the second feeding portion 9, the first conductor can be reduced without increasing the number of antennas. Two applications can be executed by the wireless unit 3 and the second wireless unit 8.

Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.

This application is based on a Japanese patent application filed on June 8, 2010 (Japanese Patent Application No. 2010-131241), the contents of which are incorporated herein by reference.

The present invention has an effect that a plurality of wireless applications can be executed while reducing the size and thickness, and can execute a plurality of wireless applications such as GPS, short-range wireless communication, wireless LAN, and television. Application to portable radios is possible.

DESCRIPTION OF SYMBOLS 101, 201, 301 Portable radio | wireless machine 2 1st circuit board 3 1st radio | wireless part 4 1st electric power feeding part 5 1st coaxial cable 6 2nd matching circuit 7 1st antenna element 8 2nd radio | wireless part DESCRIPTION OF SYMBOLS 9 2nd electric power feeding part 10 1st matching circuit 11 Battery 12 1st reactance element 13 2nd reactance element 14, 15, 209, 211 Band pass filter 51 Core wire 52 Dielectric 53 External conductor 54 Outer skin 202 Upper housing | casing 203 Lower casing 204 Hinge portion 205 Rotating portion 206 Second coaxial cable 207 Second circuit board 210 Fourth matching circuit 212 Second antenna element 213 Third reactance element

Claims (6)

In the portable radio device composed of the first housing,
A first circuit board provided in the first housing;
A first wireless unit provided on the first circuit board;
A second radio unit provided on the first circuit board;
A first power feeding unit that supplies power from the first wireless unit;
A second power feeding unit that supplies power from the second radio unit;
An antenna element provided in the first housing;
A coaxial cable that electrically connects the first feeding portion and the antenna element;
The coaxial cable is composed of a conductive core wire, a conductive outer conductor around the core wire,
The first feeding unit feeds power to the core wire of the coaxial cable,
The second power feeding unit feeds power to the outer conductor of the coaxial cable,
One end of the outer conductor is connected to the ground pattern of the first circuit board via a first reactance element, and the other end of the outer conductor is connected to the ground via the second reactance element. A portable wireless device connected to a ground pattern of a first circuit board. In the portable wireless device in which the first housing and the second housing are connected so as to be openable and closable,
A first circuit board provided in the first housing;
A second circuit board provided in the second housing;
A first wireless unit provided on the first circuit board;
A second wireless unit provided on either the first circuit board or the second circuit board;
A first power feeding unit that supplies power from the first wireless unit;
A second power feeding unit that supplies power from the second radio unit;
An antenna element provided in the second housing;
A coaxial cable that electrically connects the first feeding portion and the antenna element;
The coaxial cable is composed of a conductive core wire, a conductive outer conductor around the core wire,
The first feeding unit feeds power to the core wire of the coaxial cable,
The second power feeding unit feeds power to the outer conductor of the coaxial cable,
One end of the external conductor is connected to a ground pattern of the first circuit board through a reactance element. In the portable wireless device in which the first housing and the second housing are connected so as to be openable and closable,
A first circuit board provided in the first housing;
A second circuit board provided in the second housing;
A first wireless unit provided on the first circuit board;
A second wireless unit provided on either the first circuit board or the second circuit board;
A first power feeding unit that supplies power from the first wireless unit;
A second power feeding unit that supplies power from the second radio unit;
An antenna element provided in the second housing;
A coaxial cable that electrically connects the first feeding portion and the antenna element;
The coaxial cable is composed of a conductive core wire, a conductive outer conductor around the core wire,
The first feeding unit feeds power to the core wire of the coaxial cable,
The second power feeding unit feeds power to the outer conductor of the coaxial cable,
One end of the outer conductor is connected to the ground pattern of the first circuit board via a first reactance element,
The other end of the external conductor is connected to a ground pattern of the second circuit board through a second reactance element. A hinge portion for rotatably connecting the first housing and the second housing;
The hinge part has a conductive rotation part,
The portable wireless device according to claim 2 or 3, wherein the coaxial cable is separated from the rotating unit by a predetermined distance or more. One end of the core wire of the coaxial cable is connected to the antenna element via a third reactance element,
The other end portion of the core wire of the previous coaxial cable is connected to the first power feeding portion via a fourth reactance element, according to any one of claims 1 to 4. Portable radio. The portable wireless device according to claim 5, wherein the third reactance element and the fourth reactance element are configured by a circuit that cuts off a radio frequency of the second radio unit.

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