JP2002319817A - Antenna system and mobile wireless unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To devise the structure of a monopole element part acting like an antenna so as to allow the monopole element part to withstand repetitive bending operations and to prevent the antenna from being destroyed. SOLUTION: The antenna system 100 having a prescribed length depending on a wireless frequency to transceive a signal with the prescribed wireless frequency comprises an insulating member 11 placed at an outer circumferential part and a plurality of magnetic members 12 of a prescribed shape placed longitudinally in the tube member and the respective magnetic members 12 in the tube member are coupled with each other by a magnetic force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear antenna device having a monopole antenna element and a helical antenna element, and an antenna device suitable for being applied to a portable telephone equipped with a top-loading type antenna device. Related to portable radios.

More specifically, a plurality of magnetic members having a predetermined shape are arranged in tandem in an insulating tube member provided on an outer peripheral portion of an antenna body, and individual magnetic members in the tube member are coupled by magnetic force. When bending stress is applied from outside the tube member, the bending stress can be absorbed by the magnetic coupling force between the individual magnetic members in the tube member and the flexibility of the tube member, and the antenna This is to prevent damage to the device.

[0003]

2. Description of the Related Art In recent years, portable wireless devices such as portable terminal devices and portable telephones with a wireless function have been increasingly used. The trend of this type of portable wireless device is to extend the antenna body during a call and to store and use the antenna body during a standby in order to achieve both antenna performance during a call and portability during a standby. Many possible linear antennas are used.

In this type of portable telephone or the like, a stick type having a liquid crystal display and a keyboard on an operation surface of a terminal main body, a display main body and an operation main body are movably engaged by a hinge, and a display is provided. A liquid crystal display is attached to the main body, and a folding type with a keyboard is used for the operation main body.

FIG. 9 is a sectional view showing a configuration example of an antenna device 10 for a portable radio device according to a conventional example. The antenna device 10 forms a separate linear antenna body. This antenna body is composed of a monopole antenna element (hereinafter simply referred to as "monopole element") that works when extended and a helical antenna element (hereinafter simply called "helical element") that works when stored.

[0006] Although these two antenna elements have different physical lengths, by making the electrical lengths substantially the same, the matching state at the time of extension and at the time of storage is substantially the same. The helical element when the antenna is stored has a narrower bandwidth than that when the antenna is extended, and is more susceptible to the effect of the human body during a call. In general, there is a tendency that the characteristics at the time of storage are deteriorated as compared with the case of extension.

It is desired that the monopole element 303 has flexibility and has a restoring force against deformation in order to prevent breakage of the antenna body. In recent years, conductive shape memory alloys such as NiTi are often used. A conductive stopper member 86 is fixed to the power-supplied side of the monopole element 303 by caulking or the like. The conductive monopole element 303 is often covered with a non-conductive tube 83 so as not to be exposed to the outside.

The stopper member 86 is provided with a step at its lowermost end, and serves to fix the antenna so that the antenna does not come off when the antenna is extended. The stopper member 86 is used by being mechanically fixed by an inner spring 69 provided in the holder 62. The holder 62 is used by being fixed to a portable wireless device (not shown). Generally, a high-frequency current from the portable wireless device is transmitted to the monopole element 303 via the inner spring 69 and supplied with power.

On the open end side of the monopole element 303, a non-conductive joint 87 is provided for insulation from the helical element 302. In order to prevent the monopole element 303 from falling off from the joint 87, a shape deformation portion is provided at the tip of the monopole element 303.

The open end of the joint 87 is mechanically connected to a sleeve 67 for holding the helical element 302. The helical element 302 is mechanically fixed to the sleeve 67 by caulking or the like, and is also electrically connected. The helical element 302 is protected by the helical cover 68. This prevents deformation of the helical element 302.

According to this type of antenna device 10, when the antenna 62 is extended, the holder 62 is moved downward in the drawing.
The high frequency current is transmitted to the holder 62, the inner spring 69, the stopper member 86, and the monopole element 303, and the monopole element 303 mainly operates as an antenna. When the antenna is housed, high-frequency current is transmitted to the holder 62, the inner spring 69, the sleeve 67, and the helical element 302 with the holder 62 moved upward in the drawing, and the helical element 302 mainly operates as an antenna body.

[0012]

By the way, according to the conventional antenna device 10, the monopole element 30
Although flexible NiTi or the like is used for 3, the antenna body may be damaged by repeated bending operations.

For this reason, if the antenna body is broken, the monopole antenna 303 will not operate properly and there will be a problem that communication will be interrupted depending on the damage state of the antenna body.

In view of the above, the present invention has been made to solve the above-mentioned conventional problems, and has been devised by devising a structure of a monopole element portion which operates as an antenna body, so that an antenna body resistant to repeated bending operation can be constructed. It is another object of the present invention to provide an antenna device and a portable wireless device that can prevent damage to an antenna body.

[0015]

An object of the present invention is to provide an antenna device having a predetermined length depending on a radio frequency for transmitting or receiving a signal of a predetermined radio frequency,
An insulating tube member provided on the outer peripheral portion, and a plurality of magnetic members of a predetermined shape arranged in tandem in the tube member, wherein the individual magnetic members in the tube member are magnetically coupled. The invention is solved by an antenna device characterized in that:

According to the antenna device of the present invention, even when bending stress is applied from outside the tube member, the bending stress is exerted by the magnetic coupling force between the individual magnetic members in the tube member and the flexibility of the tube member. Can be absorbed. Therefore, a monopole antenna element that is resistant to repeated bending operations can be configured, and damage to the monopole antenna element and the like can be prevented as compared with an antenna device using a wire such as NiTi.

[0017] A portable radio device according to the present invention comprises radio communication means for transmitting and receiving a signal of a predetermined radio frequency, and an antenna device having a predetermined length dependent on the radio frequency and connected to the radio communication means. The antenna device is characterized in that it has an insulating tube member arranged on the outer peripheral portion and a plurality of magnetic members of a predetermined shape arranged in tandem in the tube member.

According to the portable wireless device of the present invention, since the above-described antenna device is applied, even when bending stress is applied from the outside of the tube member constituting the monopole antenna element, individual magnetic members in the tube member are applied. The bending stress can be absorbed by the magnetic coupling force between the members and the flexibility of the tube member. Therefore, it is possible to prevent the antenna device from being damaged due to the bending operation of the pipe member as compared with the antenna device using a wire such as NiTi.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an antenna device and a portable radio device according to the present invention will be described with reference to the drawings. (1) Embodiment FIG. 1 shows an antenna device 10 as an embodiment according to the present invention.
FIG. 3 is a cross-sectional view illustrating a configuration example of a zero. In this embodiment, a plurality of magnetic members having a predetermined shape are arranged in tandem in an insulating tube member provided on the outer peripheral portion of the antenna body, and the individual magnetic members in the tube member are joined by magnetic force. When bending stress is applied from the outside of the tube member, the bending stress can be absorbed by the magnetic coupling force between the individual magnetic members in the tube member and the flexibility of the tube member, and the antenna device It is intended to prevent breakage.

The antenna device 100 shown in FIG. 1 transmits and receives a signal of a predetermined radio frequency. The antenna device 100 has a tube member 11 and a magnetic member 12. In this example, the pipe member 11 has a predetermined length L (λ / 4, λ) depending on the radio frequency f to constitute a monopole antenna element (hereinafter simply referred to as a monopole element).
= C / f). Here, λ is the wavelength [m], c is the speed of light [m / s], and f is the radio frequency [H
z].

It is desired that the monopole element be flexible and have a certain degree of restoring force against deformation. As the tube member 11, a resin tube having a desired dielectric constant is used to protect the inclusions. The tube member itself has an insulating property, thereby protecting the human body.

At one end of the tube member 11, a power supply member 13 also serving as a stopper member for retaining magnets is attached. In the antenna device 100, the power supply member 13 is formed of a conductive member, and the power supply member 13 and the wireless communication unit 1
4 is connected to supply a high-frequency current. The core portion of the stopper member may be formed of a conductive member, and the surface thereof may be formed of an insulating member, and connected to the wireless communication means 14 by capacitive coupling to supply a high-frequency current.

The tube member 11 has, for example, a ball diameter of several hundred μm.
A plurality of spherical magnetic members 12 of about m to several mm are arranged in tandem so as to be sequentially stacked upward from the power supply member side, and the individual magnetic members 12 in the tube member are coupled by magnetic force. The magnetic member 12 has Al-Ni-Co-
Fe—Ti alloy (Alnico alloy), S1 hard ferrite MO · xFe2O3 (M = Ba, Sr and Pb, x
= 4.5-6.5). The permanent magnet is stamped and formed by powder metallurgy. Magnetic member 12
In order to finish the sphere or column.

The individual magnetic members 12 are arranged in a direction to attract each other. When a plurality of spherical magnetic members 12 are joined, the point of contact between the spherical body and the spherical body becomes a point, and even when the monopole element is bent, the total length of the monopole element itself becomes substantially constant, and the antenna characteristics are reduced. No variation occurs.

The surfaces of these magnetic members 12 are subjected to a conductive treatment in order to transmit and receive radio waves. In this conductive treatment, the surface of the magnetic member 12 is plated with gold, silver, copper, or the like of about several μm. This is because the high-frequency current basically flows on the antenna surface. The high-frequency current is supplied to this monopole element from the wireless communication means 14 at the time of transmission or the like.

The magnetic member 12 is not limited to a spherical shape, but may be a columnar shape, a cylindrical shape having one concave surface in the laminating direction and a convex surface in the laminating direction, or a concave surface and one convex surface in the laminating direction. May be used. Hereinafter, it is simply referred to as a cylindrical shape with an uneven surface or a cylindrical shape.

A cap member (not shown), a helical antenna, or the like is attached to the other end of the tube member 11 depending on the usage of the antenna device 100. When the helical antenna has a structure capable of storing the antenna device 100, the helical antenna functions after storing the monopole element in the main body.

Next, the magnetic members 22A and 22A constituting the monopole element portion of the other antenna devices 200 and 300
The shape of 22B will be described. FIG. 2A shows a configuration example of an antenna device 200 having a columnar magnetic member 22A. 3A to 3D are diagrams illustrating a configuration example of a columnar magnetic member 22B with an uneven surface. 3A is a top view, FIG. 3B is a side view, FIG. 3C is a cross-sectional view taken along the line X1-X2, and FIG. 3D is a bottom view.

In the antenna device 200 shown in FIG. 2A, a plurality of cylindrical members each having a diameter of about several hundred μm to several mm and a height h of several hundred μm to several mm are provided in the tube member 11 of the monopole element portion. The magnetic members 22A are arranged in tandem so as to be stacked, and the individual magnetic members 22A in this tube member are magnetically coupled. Magnetic member 22A
If the magnetic member 1 is in a state of being connected (connected) straight, the spherical magnetic member 1 is ideally a point where the high-frequency current flows on the surface.
The antenna characteristics are more stable than those of the monopole element provided with 2.

FIG. 2B shows a cylindrical magnetic member 2 having an uneven surface.
3 shows a configuration example of an antenna device 300 having 2B. In the antenna device 300 shown in FIG. 2B, the diameter is several hundred μm in the tube member 11 of the monopole element portion.
A plurality of cylindrical magnetic members 22B having a concavo-convex surface having a height h of several hundred μm to several mm are arranged in a cascade so that individual magnetic members 22B in the tube member are stacked. Are coupled by magnetic force. The upper portion of the magnetic member 22B forms a convex portion, and the lower portion forms a concave portion. When the plurality of magnetic members 22B are stacked, the upper convex portion is joined to the lower concave portion of the next magnetic member 22B.

That is, one magnetic member 22 B is
01 when viewed from the upper surface, and is substantially a perfect circle when viewed from the lower surface. Further, when this is viewed from the side, as shown in FIG. 3B, it has a convex surface on the upper part of the columnar part 201. This portion is referred to as a convex portion 202. The lower part of the inside of this cylindrical part 201 is shown in FIG.
As shown in FIG. Column part 201
Is h.

The curvature of the convex surface is equal to or slightly smaller (slower) than the curvature of the concave surface. When the curvatures are equal, the magnetic member 22B comes into surface contact when sliding.

Therefore, in a state where these magnetic members 22B are connected (connected) straight, the antenna characteristics are stabilized in the same manner as the cylindrical magnetic member 22A at the point where the high-frequency current flows on the surface. In addition, when a plurality of cylindrical magnetic members 22B having an uneven surface are connected, the convex portions and the concave portions of the cylindrical shape having the uneven surface are in a line contact state or a plurality of point contact states. Is bent, the entire length of the antenna element is substantially constant because the contact portion slides and makes contact with the line.

FIG. 4 is a side view showing an example of the shape of another magnetic member 22C. The shape of the top surface of the magnetic member 22C shown in FIG. 4 is substantially the same as that of the magnetic member 22B, but the shape of the bottom surface is different. In order to increase the movability as compared with the magnetic member 22B, a chamfering process that forms a part of a conical side surface is performed. The height h 'of the magnetic member 22C is set arbitrarily. This is for combining a plurality of magnetic members 22C having different heights h ′. For example, a magnetic member 22C having a low height h 'may be arranged at a bent portion of the monopole antenna, or a relatively high magnetic member 22C having a height h' may be provided at a straight portion thereof.
C ′ can be placed.

Next, an example of operation when the antenna device 100 is bent will be described. FIG. 5 is a cross-sectional view illustrating a bent example of the antenna device 100. In this example, the cylindrical magnetic member 22A shown in FIG. 2A is applied to the antenna device 100.

On the premise of this, in the monopole element shown by the two-dot chain line in FIG. 5, when the pipe member 11 is bent by applying an external force to the right from the state in which the pipe member 11 stands upright, for example. The folded state (posture) is maintained while an external force is applied. When the external force is removed, the pipe member 11 returns to the original position. This is because each magnetic member 12 tends to settle at a position where the flexibility of the tube member 11 and the magnetic coupling force between the individual magnetic members 12 in the tube member are balanced.

Further, an external force is applied from the state shown in FIG.
Even when 1 is bent to 90 ° with respect to the original position, the bent state (posture) is maintained as long as the external force is applied. At this time, the spherical magnetic members 12 in the tube member slide individually to absorb bending stress.

A repulsive magnetic force is also applied between the individual magnetic members 12 in the tube member, and a force for returning the tube member 11 to its original position acts. Therefore, when the external force is removed, the pipe member 11 returns to the original position. In the same manner as when the external force is removed in the state described above, the individual magnetic members 12 are settled at a position where the flexibility of the tube member 11 and the magnetic coupling force between the individual magnetic members 12 in the tube member are balanced. You. Note that the equilibrium position is not limited to the original straight standing state.

As described above, according to the antenna device 100 according to the embodiment of the present invention, even when bending stress is applied from the outside of the tube member, the individual magnetic members 1 in the tube member are not affected.
The bending stress can be absorbed by the magnetic coupling force between the two and the flexibility of the tube member 11. Therefore, it is possible to configure the antenna device 100 including the monopole element that is strong against the repeated bending operation, and it is possible to prevent the damage of the monopole element and the like as compared with the antenna device using the wire such as NiTi.

(2) Embodiment FIG. 6 is a partially broken top view showing a configuration example of a mobile phone 101 as an embodiment according to the present invention. In this embodiment, any one of the antenna devices 100 to 300 described with reference to FIG. 1 is applied to a mobile phone 101 as an example of a mobile wireless device. Of course, an antenna device having the magnetic member 22C may be used.

The mobile phone 101 shown in FIG. 6 has a main body 21 as a housing. An antenna 26 as an example of the antenna device 300 is attached to the main body 21 to transmit and receive a signal of a predetermined radio frequency. In this example, the antenna 26 has an opening 61 and a holder 62 with an inner spring.
1 is screwed and fixed. A pair of contact-type leaf springs (hereinafter referred to as inner springs) 69 are mounted in the holder 62. When using two leaf springs, 180
° and 120 when three leaf springs are used.
It is arranged every °.

The antenna 26 is composed of a monopole element 301 which works at the time of extension and a helical element 3 which works at the time of storage.
Numeral 02 designates a separable and expandable and retractable linear antenna.

The monopole element 301 is a tube member 11
A tube 63 made of resin, which is an example of
3 includes a plurality of columnar magnetic members 22B with uneven surfaces arranged in tandem (in a straight line).
This structure is to provide flexibility for preventing antenna breakage and to provide a restoring force against deformation of the monopole element 301.

The magnetic member 22B laminated in the tube 63 has a predetermined length L depending on the radio frequency. The length L at the time of lamination is, for example, 800 M
When a λ / 4 monopole antenna is configured in the Hz band, it is approximately 9.4 cm. The length of the tube 63 is slightly longer than the length L of the magnetic member 22B. This is because filling of the insulating member and the like is performed.

This monopole element 301 is slidably engaged inside the opening 61 of the holder 62. The surface of the magnetic member 22B loaded in the tube 63 is plated with metal such as gold, silver or copper in order to have conductivity. The surface treatment may be omitted when the originally conductive ferromagnetic material is magnetized into the magnetic member 22B. In that case, it is preferable that the anticorrosion treatment be performed even on the conductive magnetic member 22B.

In this monopole element 301, a plurality of cylindrical magnetic members 22B having an uneven surface are supported so as to cover the outside of the magnetic members 22B so that the arrangement thereof is not largely shifted by a resin tube 63. Have been. At one end of the tube 63, a stopper member 64 for retaining the magnetic member 22B and a stopper member 66 for retaining the antenna for preventing the monopole element 301 from coming out of the holder 62 are attached.

The stopper member 64 is made of a metal rod (conductive material) such as copper. One end of the stopper member 64 is engaged with the tube 63 and used to prevent the magnetic member 22B from coming off, and the other end is fixed by caulking the stopper member 64. One end of the tube 63 is a stopper member 6
In a state where the antenna 4 is inserted, the antenna 4 is fixed to the inside of the stopper member 66 for retaining the antenna by screwing, bonding, resin sealing, or the like.

The stopper member 66 is made of a resin material or the like, and has a step at its lowermost end. The stopper member 66 serves to fix the antenna element 301 so as not to come out of the holder 62 when the monopole element 301 is extended. have. When the stopper member 66 is made of a ferromagnetic material, the stopper member 66 and the monopole element 301 are mechanically and electrically connected by the magnetic force of the magnetic member 22B without using a fixing method such as caulking. It may be.

A helical antenna element (hereinafter simply referred to as a helical element) 302 is attached to the open end of the monopole element 301, that is, the other end of the tube 63 made of resin. The helical element 302 is supported by a sleeve 67 and protected by a helical cover 68. This is for preventing deformation of the helical element 302. The tube 63 is fixed to the sleeve 67 by screwing or bonding.

An insulating portion is provided on the open end side of the monopole element 301 so as to be electrically insulated from the helical element 302. Therefore, the length of the tube 63 is set to be longer than that of the monopole element 301, and a space is provided in the tube 63. If there is a possibility that this space lowers the bending strength of the tube 63, it is preferable to fill this space with a non-conductive material.

Since the upper portion of the sleeve or the cap 68 has a larger diameter than the sleeve 67, the movable range of the holder 62 is suppressed. The outer diameter of the tube 63 is smaller than that of the sleeve 67 and the stopper member 64, and the lower end of the helical cover 68 and the lower end of the stopper member 66 are larger than that.

The stopper member 66 is mechanically fixed by the inner spring 69 of the holder 62 when the monopole element 301 is extended. The holder 62 is electrically connected to the wireless communication means 14, and transmits a high-frequency current from the portable wireless device to the stopper member 66 through the inner spring 69.

That is, the inner spring 69 of the holder 62 mechanically holds the stopper member 66 when the antenna is extended, transmits the high-frequency current supplied to the holder 62 to the stopper member 64, and mechanically moves the sleeve 67 when the antenna is housed. And contacts the sleeve 67 with the high-frequency current supplied to the holder 62.

Next, an example of the internal configuration of the mobile phone 101 to which the antenna device is applied will be described. FIG. 7 is a block diagram of a control system showing an example of the internal configuration of the mobile phone 101. In this example, the mobile phone 101 is provided with wireless communication means for transmitting and receiving a signal of a predetermined wireless frequency, and an antenna device connected to the wireless communication means.

The mobile phone 101 shown in FIG.
The CPU 33 is connected to an internal bus 38. The internal bus 38 is connected to a wireless reception unit 41, a reception signal processing unit 42, a transmission signal processing unit 43, a wireless transmission unit 44, and the like that constitute a wireless communication unit.

An antenna duplexer 45 is connected to the radio receiving unit 41 and the radio transmitting unit 44, and a telescopic separated antenna 26 which is an example of an antenna device is connected to the antenna duplexer 45. I have. Wireless receiver 41
In, the radio wave received by the antenna 26 is separated from the transmission signal by the antenna sharing device 45, and only the reception signal of a predetermined carrier frequency is selected. The received signal is converted from digital to analog by digital-to-digital conversion. The reception information is output from the receiver speaker 24 after being processed by the reception signal processing unit 42. A speaker 32 for the back is connected to the reception signal processing unit 42, and when a call is received, a "pip, pip,
...

A transmission signal processing unit 43 is connected to the microphone 28, and its own audio signal is amplified and then converted from analog to digital. The converted audio information is encoded and compressed. The encoded audio compression information is output from the transmission signal processing unit 43 to the wireless transmission unit 44. The transmission information after adding the error correction code is modulated in the wireless transmission unit 44. The modulated transmission information is digital-to-analog converted.

The converted transmission signal is amplified after being converted into an intermediate frequency transmission signal. The carrier frequency signal is modulated by the amplified transmission signal, power-amplified, and
6 is radiated toward the wireless base station. The internal bus 38 is connected to the EEPROM 36, the ROM 34, the RAM 35, and the external I / O interface 37, and a power supply unit 93 is connected to these circuits. Since these functions are not directly related to the antenna 26, the description thereof is omitted.

Next, an operation example of the antenna 26 of the mobile phone 101 will be described. FIGS. 8A and 8B are conceptual diagrams showing operation examples when the antenna 26 is extended and stored. In this example, it is assumed that a telescopic separated antenna 26 is used. 8A, when the antenna is extended, that is, when the monopole element 301 is pulled out from the main body 21 of the mobile phone 101 and the stopper member 66 is supported by the holder 62, the holder 62 and the inner spring 69 shown in FIG. The high-frequency current is transmitted to the stopper member 66, the monopole element 301, and the monopole element 301 mainly operates as an antenna.

At this time, even when the monopole element 301 is bent straight by applying an external force to the right from the state in which the monopole element 301 stands straight, if the external force is removed, the monopole element 301 is removed.
Is returned to the original position. This is because each magnetic member 22B tends to settle at a position where the flexibility of the tube 63 of the monopole element 301 and the magnetic coupling force between the individual magnetic members 22B in the tube 63 are balanced.

In FIG. 8B, when the antenna is housed,
That is, the monopole element 301 is
The holder 6 shown in FIG.
2 supports the sleeve 67, the holder 62, the inner spring 69, the sleeve 67, and the helical element 302 transmit high-frequency current, and mainly the helical element 3
02 operates as an antenna body.

As described above, according to the portable wireless device 101 according to the embodiment of the present invention, since the above-described antenna device 300 is applied to the antenna body 26, the resin tube 63 constituting the monopole element 301 is formed. Even if bending stress is applied from outside to the tube, the tube 63
The bending stress can be absorbed by the magnetic coupling force between the individual cylindrical magnetic members 22 </ b> B with the uneven surface and the flexibility of the tube 63. Therefore, NiTi
Tube 63 compared to the antenna 26 using a wire such as
The antenna 26 can be prevented from being damaged due to the bending operation of the antenna.

In this embodiment, the monopole element 3
Although the description has been given of the case of the mobile phone 101 provided with the detachable and extendable antenna 26 having the helical element 302 and the helical element 302, the present invention is not limited to this. Telephone 1
01 is fine. Further, the antenna 26 may be a top-loading type antenna or the like. The shape of the antenna is not limited.

In this embodiment, a conventional antenna device 1
Although a larger load is applied to the tube 63 than the resin tube 83, the antenna devices 100 and 20 can sufficiently withstand the tensile strength of the antenna body by increasing the fixing strength of the tube 63, the stopper member 66 and the sleeve 67.
0,300 can be provided.

[0065]

As described above, according to the antenna device of the present invention, a plurality of magnetic members having a predetermined shape are arranged in a row in an insulating tube member provided on the outer peripheral portion. The individual magnetic members in the member are combined by magnetic force.

With this structure, even when bending stress is applied from outside the tube member, the bending stress can be absorbed by the magnetic coupling force between the individual magnetic members in the tube member and the flexibility of the tube member. . Therefore, a monopole antenna element that is resistant to repeated bending operations can be configured, and damage to the monopole antenna element and the like can be prevented as compared with an antenna device using a wire such as NiTi.

According to the portable wireless device of the present invention, since the above-described antenna device is applied, even when bending stress is applied from outside the tube member constituting the monopole antenna element, individual magnetic members in the tube member are applied. The bending stress can be absorbed by the magnetic coupling force between the members and the flexibility of the tube member. Therefore, it is possible to prevent the antenna device from being damaged due to the bending operation of the pipe member as compared with the antenna device using a wire such as NiTi.

The present invention is very suitable when applied to a linear antenna having a monopole antenna element and a helical antenna element, a portable telephone having a top-loading antenna, and the like.

[Brief description of the drawings]

FIG. 1 shows an antenna device 1 according to an embodiment of the present invention.
It is sectional drawing which shows the example of a structure of 00.

FIG. 2A is a cross-sectional view showing a configuration example of each antenna device having a cylindrical magnetic member 22A having a cylindrical magnetic member 22A, and having a cylindrical magnetic member 22B having an uneven surface.

FIGS. 3A to 3D are diagrams illustrating a configuration example of a columnar magnetic member having an uneven surface.

FIG. 4 is a diagram showing an example of the shape of another magnetic member.

FIG. 5 is a cross-sectional view illustrating a bent example of the antenna device 100.

FIG. 6 shows a mobile phone 101 as an embodiment according to the present invention.
It is a top view of the partial crushing which shows the example of a structure.

FIG. 7 is a block diagram of a control system showing an example of an internal configuration of the mobile phone 101.

FIGS. 8A and 8B are conceptual diagrams showing operation examples when the antenna 26 is extended and stored.

FIG. 9 shows an antenna device 10 for a portable wireless device according to a conventional example.
It is sectional drawing which shows the example of a structure.

[Explanation of symbols]

Reference numeral 11: tube member, 12: magnetic member, 13: power supply member, 14: wireless communication means, 22A: cylindrical magnetic member, 22B, 22C: cylindrical shape with uneven surface Magnetic member, 63 ... tube (tube member), 10
0, 200, 300 ... antenna device, 101 ...
Cellular phone (portable radio), 301: monopole element, 302: helical element

Claims (13)

[Claims] 1. An antenna device having a predetermined length depending on a radio frequency for transmitting or receiving a signal of a predetermined radio frequency, comprising: an insulating tube member provided on an outer peripheral portion; An antenna device, comprising: a plurality of magnetic members having a predetermined shape arranged in tandem in a tube member; and the individual magnetic members in the tube member are coupled by magnetic force. 2. The magnetic member has a spherical shape, a cylindrical shape, a cylindrical shape in which one is concave and the other is convex in the laminating direction, or a cylindrical shape in which one is concave and the other is convex in the laminating direction. The antenna device according to claim 1, comprising: 3. The antenna device according to claim 1, wherein a surface of the magnetic member is subjected to a conductive treatment. 4. The antenna device according to claim 1, wherein the tube member is formed of a resin tube. 5. The antenna device according to claim 1, wherein the tube member forms a monopole antenna element having a feeding member at one end. 6. A radio communication unit for transmitting and receiving a signal of a predetermined radio frequency, and an antenna device having a predetermined length depending on a radio frequency and connected to the radio communication unit, the antenna device comprising: A portable wireless device comprising: an insulating tube member provided on an outer peripheral portion; and a plurality of magnetic members having a predetermined shape arranged in tandem in the tube member. 7. The portable wireless device according to claim 6, wherein the individual magnetic members in the tube member are coupled by magnetic force. 8. The magnetic member may have a spherical shape, a cylindrical shape, a cylindrical shape in which one is concave and the other is convex in the stacking direction, or a cylindrical shape in which one is concave and the other is convex in the stacking direction. The portable wireless device according to claim 6, wherein the portable wireless device has: 9. The portable wireless device according to claim 6, wherein a surface of the magnetic member is subjected to a conductive treatment. 10. The portable wireless device according to claim 6, wherein the tube member is formed of a resin tube. 11. The antenna device has a helical antenna element and a monopole antenna element joined to the helical antenna element via an insulating member, wherein the monopole antenna element has an outer peripheral portion. 7. The portable wireless device according to claim 6, further comprising: an insulating tube member disposed in the tube member; and a plurality of magnetic members having a predetermined shape arranged in tandem in the tube member. 12. The portable wireless device according to claim 6, wherein the antenna device constitutes a linear antenna body in which the helical antenna element and the monopole antenna element are separable and extendable and retractable. 13. The portable wireless device according to claim 6, wherein the antenna device constitutes a top-loading antenna.