JPH0936629A - Portable radio device and antenna coupling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably keep a high radio talking quality at the time of using a portable radio device in an automobile. SOLUTION: This portable radio device is provided with a feeding member 32 between a high frequency circuit in an enclosure 10 and an antenna 31 stored in a protection case 33 and has an aperture 33w, through which the feeding member 32 is partially exposed, in the protection case is put on a placing part 201 of an antenna coupling device which couples the high frequency circuit of the portable radio device and an external antenna 1 through a prescribed feeder 2. A connection conductor 203 is arranged in such position on this placing part that it can come into contact with the feeding member of the portable radio device, and this connection conductor is connected to the, feeder, thereby electrically connecting the high frequency circuit of the portable radio device and the external antenna 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable radio device and an antenna coupling device suitable for use in, for example, an automobile.

[0002]

2. Description of the Related Art In a mobile phone, as shown in FIG. 9, an opening 12 for a receiver (speaker) and a transmitter (microphone) is usually provided on a front surface 10f of a phone casing 10.
h and 13h are provided, and a dial key 14 and various function control keys 15 are provided. Further, the liquid crystal display element 16 is arranged at the center of the front surface 10f.

An arc-shaped projecting portion 1 is provided on the left side of the upper portion of the housing 10.
0c is formed to prevent removal during use. An operation knob for function control is provided so as to contact the peripheral edge of the overhanging portion 10c, and when the user holds the housing 10 with the left hand, the thumb drives the peripheral edge of the knob 17 upward or downward. Thus, the knob 17 is rotated clockwise or counterclockwise.

A flexible monopole antenna, so-called whip antenna 18, having a length of 1/4 of the wavelength λ corresponding to the transmission / reception frequency can be housed in the top surface 10t of the housing 10 in the housing 10. It is attached to the
The whip antenna 18 is pulled out.

Further, in addition to the whip antenna as described above, a helical antenna having a length of ¼ of the wavelength λ is coaxially arranged, and a helical portion and a monopole portion are provided at the time of withdrawal and the time of storage. Some are equipped with a composite antenna that is electrically separated.

First, an example of a conventional composite antenna will be described with reference to FIGS. 10 and 11.

In FIGS. 10 and 11, a casing 10 of a portable wireless device is made of synthetic resin, and a cylindrical metal fitting 101 for antenna mounting is incorporated by insert molding or the like.

A circuit board (printed wiring board) 21 is housed inside the housing 10. A required circuit such as an RF circuit 22 for transmission / reception and a matching circuit 23 is mounted on the circuit board 21, and a feeding spring 24 is attached to the matching circuit 23 and the feeding spring 24 is attached. It is in contact with the metal fitting 101 for mounting the antenna.

The helical antenna system 30 mainly comprises a helical conductor 31 having an electric length of approximately λ / 4. One end of this conductor 31 is wound around the upper end of a support conductor 32, and the lower end of the support conductor 32 is It is coupled to the inside of the metal fitting 101 for mounting the antenna by a screw groove or the like. The entire length of the helical conductor 31 is housed in a protective case 33 made of an appropriate insulating material, and an opening 33o is formed in the upper surface of the protective case 33.

On the other hand, the monopole antenna system 40 is mainly composed of a linear conductor 41 having an electric length of approximately λ / 4, and is covered with an appropriate dielectric 42 over substantially the entire length of the conductor 41. The support conductor 43 is coupled to the lower end of the conductor 41.

The upper portion 43a of the support conductor 43 is formed in a cylindrical shape, and the linear conductor 41 and the dielectric 42 are inserted therein to be mechanically coupled to each other.
The lower portion 43b of the linear conductor 4 is formed by a method such as caulking.
1 mechanically and electrically coupled.

An outer diameter of the lower portion 43b of the support conductor 43 is set to be larger than an inner diameter of the support conductor 32, and is used for locking. The outer diameter of the upper portion 43a of the support conductor 43 is set to be equal to the inner diameter of the support conductor 32.

Then, as shown in FIG. 10, the monopole antenna system 40 is inserted into the opening 33o of the protective case 33 of the helical antenna system 30 and arranged coaxially with the helical antenna system 30, as shown in FIG. In such a pulled-out state, the support conductor 4 of the monopole antenna system 40
The upper portion 43a of the upper portion 3 is slidably supported by the support conductor 32.

The upper end of the dielectric 42 of the monopole antenna system 40 extends beyond the upper end of the conductor 41 to form a "T".
A knob portion 42t having a V-shaped cross section is formed. The outer diameter of the knob portion 42t is set to be substantially the same as the outer diameter of the protective cover 33 for locking, and the middle portion 42s is
The outer diameter of the protective cover 33 is set so as to engage with the opening 33o of the protective cover 33, and the monopole antenna system 40 is fixed in the housed state as shown in FIG.

With the above-described structure, the monopole antenna system 4 is in the pulled-out state as shown in FIG.
The support conductor 43 of 0 contacts the support conductor 32 of the helical antenna system 30, and the conductor 41 is fed from the RF circuit 22 through the metal fitting 101, the feeding spring 24, and the matching circuit 23, and the linear conductor 41 and the helical conductor 31. Both become radiation conductors.

Further, in the storage state as shown in FIG. 11, the support conductor 32 of the helical antenna system 30 has the metal fitting 1
01, and the helical conductor 3 from the RF circuit 22 through the metal fitting 101, the feeding spring 24, and the matching circuit 23.
1 is fed, and this helical conductor 31 becomes a radiation conductor.

In this state, the monopole antenna system 40
The linear conductor 41 is electrically separated from the helical antenna system 30 by the dielectric 42, and only the helical antenna system 30 functions.

In the above-mentioned composite antenna, the support conductor 43 of the monopole antenna system 40 is in contact with the support conductor 32 of the helical antenna system 30 in the pulled-out state as shown in FIG. Function and interfere with each other.

In order to solve the above-mentioned problems when the conventional composite antenna is pulled out, the applicant of the present invention electrically connects the helical portion and the monopole portion to each other in both the pulled-out state and the housed state. We have already proposed a composite antenna that is designed to be separated.

Next, this already proposed composite antenna will be described with reference to FIGS. In addition,
12 to 14, parts corresponding to those in FIGS. 10 and 11 are given the same reference numerals.

The helical antenna system 30S is mainly composed of
A helical conductor 31 having an electrical length of approximately λ / 4 is formed. One end of this conductor 31 is wound around the upper end of an annular support conductor 32rr, and a protective case 33 made of an appropriate insulating material is provided over the entire length of the conductor 31. It is stored. The upper surface of the protective case 33 has an opening 33o.

An annular spacer 34 made of an insulating material is disposed adjacent to the lower end of the support conductor 32r, and a cylindrical antenna is arranged so as to face the lower end of the support conductor 32r via the spacer 34. The support fitting 35 is arranged at the lower end of the protective case 33. Then, the support fitting 35 is coupled to the inside of the fitting 101 for mounting the antenna by a thread groove or the like.

The inner diameters of the support conductor 32r, the spacer 34, and the support fitting 35 are set equal to d35.

On the other hand, the monopole antenna system 40S is mainly composed of a linear conductor 41 having an electric length of approximately λ / 4, and is covered with an appropriate dielectric 42 over substantially the entire length of the conductor 41. The support conductor 43 is coupled to the lower end of the conductor 41.

The upper portion 43a of the supporting conductor 43 is formed in a cylindrical shape, and the linear conductor 41 and the dielectric 42 are inserted into the upper portion 43a to be mechanically coupled to each other.
The lower portion 43b of the linear conductor 4 is formed by a method such as caulking.
1 mechanically and electrically coupled.

An outer diameter of the lower portion 43b of the support conductor 43 is set to be larger than an inner diameter d35 of the support fitting 35, and is used for locking. The outer diameter d43 of the upper portion 43a of the support conductor 43 is set to be equal to the inner diameter d35 of the support fitting 35, and the height (axial length) ha thereof is set to the support fitting 3.
It is set to be approximately equal to the height h35 of 5.

As shown in FIG. 12, the monopole antenna system 40S is inserted into the opening 33o of the protective case 33 of the helical antenna system 30S and arranged coaxially with the helical antenna system 30S, as shown in FIG. In such a pulled-out state, the upper portion 43a of the support conductor 43 of the monopole antenna system 40S is slidably supported by the support fitting 35.

Dielectric 42 of monopole antenna system 40S
The upper end of the conductor 41 extends beyond the upper end of the conductor 41 and is joined to the lower end 51b of the cylindrical connecting conductor 51 to form a height difference h42 between the lower end 51b and the upper end of the conductor 41. At the same time, a lower end portion 52c of a knob member 52 also serving as a locking member, which is made of an appropriate insulating material and has a "T" -shaped cross section, is coupled to the upper end portion 51a of the connection conductor 51.

The upper end portion 52a of the knob member 52 is
For locking, its outer diameter is set to be substantially equal to the outer diameter of the protective cover 33, and the middle portion 52 of the knob member 52 is
a fits into the opening 33o of the protective cover 33,
The outer diameter is set, and the monopole antenna system 40S is fixed in the housed state as shown in FIG.

The outer diameter d51 of the connection conductor 51 is set equal to the inner diameters (d35) of the support conductor 32r, the spacer 34 and the support fitting 35, and the height h51 of the connection conductor 51 is the support conductor 32r, the spacer 34 and the support. The heights of the metal fittings 35 are set to be approximately equal to the sum of h32 + h34 + h35, and the monopole antenna system 40S as shown in FIG.
In the stored state, both end portions 51a of the connection conductor 51,
51b is slidably supported by the support conductor 32r and the support fitting 35.

With the above-described structure, the monopole antenna system 4 is provided in the pulled-out state as shown in FIG.
The support conductor 43 of 0S contacts the support fitting 35,
1, the conductor 41 is fed from the RF circuit 22 through the feeding spring 24 and the matching circuit 23.
Is the radiation conductor.

In this state, the monopole antenna system 40S
The support conductor 43 of does not contact the support conductor 32r of the helical antenna system 30S, and therefore the helical antenna system 30S does not function.

In the housed state as shown in FIG. 13, the support conductor 32r of the helical antenna system 30S is
The metal fitting 35, the metal fitting 101, the feeding spring 24, and the matching circuit 23 come into contact with the support fitting 35 via the connection conductor 51.
Through this, the helical conductor 31 is fed from the RF circuit 22, and this helical conductor 31 becomes a radiation conductor.

In this state, the monopole antenna system 40
The linear conductor 41 of S is electrically separated from the helical antenna system 30S by the dielectric 42 that forms the height difference h42 between the upper end of the linear conductor 41 and the lower end 51b of the connecting conductor 51, and only the helical antenna system 30S is separated. Function.

In the intermediate state as shown in FIG. 14, since the connecting conductor 51 and the support fitting 35 are not in contact with each other, the fitting 35, the power feeding spring 24 and the matching circuit 23 are used to pass RF. The power supply path to the circuit 22 is not formed, and the helical conductor 31 does not function as an antenna.

Further, in this state, the linear conductor 41 of the monopole antenna system 40S is similar to the housed state of FIG.
The support conductor 43 does not contact the support fitting 35,
The RF circuit 2 is fed through the feeding spring 24 and the matching circuit 23.
Since the power is not supplied from 2, the linear conductor 41 also does not function as an antenna.

[0037]

By the way, it is conceivable to use the above-mentioned portable telephone in an automobile.
In this case, the metal body of the automobile becomes an obstacle, and it is usually difficult to secure good wireless communication quality through the antenna of the mobile phone itself.

Therefore, the applicant of the present invention has already proposed an antenna coupling device for ensuring good wireless communication quality when the mobile phone is used in an automobile.

As shown in FIG. 15, this antenna coupling device (vehicle adapter) 200 is installed on a (center) console box of an automobile or the like, and is attached to the inside of the left rear window by, for example, a suction cup. In addition, it is connected to a known external antenna 1 by a coaxial feeder line 2. And
A mobile phone is placed on the antenna coupling device 200.

Although not shown, the antenna coupling device 200 has a built-in quick charger and is connected to the battery of the automobile through the cigarette lighter CGLT. Further, the antenna coupling device 200 may be connected to a known external antenna installed on the upper surface of the vehicle body, such as on the side of a trunk room, by a coaxial feeder line.

As shown in FIG. 16, the antenna coupling device 2
In the conductor plate 201 of No. 00, an annular spacer 202 made of an appropriate insulating material is embedded, and a connecting pin 203 is arranged at the center thereof.

The connecting pin 203 is connected to the internal conductor of the coaxial feeder line 2 connected to the external antenna 1 and the coupling loop 204. Also, the conductor plate 2
An outer conductor of the coaxial feed line 2 is connected to 01, and a ground loop 205 is directly erected while being aligned in the axial direction of the coupling loop 204.

Then, on the antenna coupling device 200,
In the state where the housing 10 of the mobile phone is placed, the above-mentioned FIG.
0, as shown in FIG. 11, the helical antenna system 30 is inserted into both loops 204 and 205, and the coupling loop 204 is positioned coaxially with the helical conductor 31 with the protective cover 33 being interposed therebetween. And loop 2
04 is electromagnetically coupled to each other to exchange high-frequency energy with each other.

The ground loop 205 has a knob portion 42.
When the loop 204 and the helical conductor 31 are located closer to t and are electromagnetically coupled to each other, the unwanted radiation from the helical conductor 31 is reflected to reduce the unwanted radiation component.

For convenience of explanation, it is assumed in this specification that the mobile phone is in the transmission mode.

However, in the proposed antenna coupling device 200 as described above, in spite of the existence of the ground loop 205, unnecessary radiation from the helical conductor 31 is generated to some extent, and the transmission loss to the coupling loop 204 is caused. There is a problem that is easy to grow.

Further, the loop 204 and the helical conductor 31
Since and are connected by electromagnetic coupling, there is also a problem that the characteristics are easily affected by the peripheral parts of the connection part. That is, when the form telephone and the external antenna connection device are arranged in a state of being attached to a vehicle, if something that disturbs the electromagnetic field is placed in the vicinity of the connection portion, stable electromagnetic coupling may not be performed.

Further, the helical conductor 31 and the coupling loop 20
4 is electromagnetically coupled to the mobile phone housing 1
The grounding conductor in 0 (not shown) and the antenna coupling device 2
Since the conductor plate 201 of No. 00 is not DC-connected, a potential difference is generated between the two, which should originally have the same potential, and the radiation characteristic tends to be unstable when the external antenna 1 is attached. There was also a problem.

In view of the above point, an object of the present invention is to provide a portable wireless device and an antenna coupling device which can stably maintain good wireless communication quality when the portable wireless device is used in an automobile. It is in.

[0050]

In order to solve the above-mentioned problems, a portable radio apparatus according to the invention of claim 1 has an antenna, a high-frequency circuit in a housing, and a power feeding path between the antenna and the high-frequency circuit. A portable wireless device comprising a power feeding member for forming the power feeding member, wherein an opening for partially exposing the power feeding member to the outside is provided.

Further, an antenna coupling device according to a second aspect of the present invention is characterized in that the mounting portion of the portable radio device according to the first aspect, the external antenna, the power supply line connected to the external antenna, and the power supply line are connected. A connection conductor that is connected and that is inserted into the opening of the mobile wireless device when the mobile wireless device is placed on the mounting portion and is in direct contact with the power feeding member for electrical connection. And the high frequency circuit of the portable wireless device and the external antenna are coupled via the connection conductor and the power supply line.

According to the above-mentioned structure of claim 1 and claim 2, when the portable wireless device is placed on the mounting table of the antenna coupling device, the feeding member of the portable wireless device and the connection conductor of the antenna coupling device are separated from each other. The high frequency circuit of the portable wireless device and the external antenna are reliably coupled to each other by being in direct contact and electrically connected.

Further, in the portable radio apparatus according to the invention of claim 3, an antenna, a high frequency circuit inside the housing, a power feeding member for forming a power feeding path between the antenna and the high frequency circuit, and inside the housing. And a reference potential conductor, wherein an opening for partially exposing the reference potential conductor is provided in the housing.

An antenna coupling device according to a fourth aspect of the present invention comprises the mounting portion of the portable radio device according to the third aspect, an external antenna, and a power feed line connected to the external antenna, and through the power feed line. An antenna coupling device configured to couple the high-frequency circuit of the portable wireless device and the external antenna, wherein the portable wireless device is connected to a ground conductor and the portable wireless device is mounted on the mounting part. And a conductive member that is inserted into the opening of the portable wireless device and is in direct contact with the reference potential conductor for electrical connection.

According to the third and fourth aspects of the invention, when the portable wireless device is placed on the mounting table of the antenna coupling device, the reference potential conductor of the portable wireless device and the conductive member of the antenna coupling device. Are directly contacted and electrically connected,
The reference potential conductor of the portable radio device is securely coupled to the ground conductor to which the conductive member of the antenna coupling device is connected.

[0056]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a portable radio apparatus and an antenna coupling apparatus according to the present invention will be described below with reference to FIGS.

[Structure of the First Embodiment] FIG. 1 shows the entire structure of the embodiment of the portable radio apparatus of the present invention, and FIG. 2 shows the structure of the main part thereof. The configuration of an embodiment of the device is shown in FIG. In FIGS. 1 and 2, parts corresponding to those in FIGS. 10 and 11 showing the conventional composite antenna are denoted by the same reference numerals and a part of the description thereof will be omitted, and in FIG. Portions corresponding to 16 are denoted by the same reference numerals and part of the description will be omitted.

In FIG. 1, on the back surface 10b of the casing 10 of the mobile phone, there is a metal pin which is DC-connected to a ground pattern (not shown) of the circuit board (printed wiring board) 21. In order to expose the ground terminals 25a, 25b ... As a plurality of reference potential conductors, a plurality of connection windows 102 are formed.

Further, on the back side of the protective cover 33 attached to the upper surface of the casing 10 of the mobile phone, as shown in FIG. 2, the support conductor 32 of the helical conductor 31 is partially exposed. A connection window 33w is punched.

On the other hand, as shown in FIG. 3, in the antenna coupling device 200G of the present invention, like the antenna coupling device 200 shown in FIG. 16, the center of the spacer 202 embedded in the conductor plate 201 is, for example, at the center. A connecting pin 203 made of an elastic conductive material such as phosphor bronze is provided.
An internal conductor of the coaxial feeder line 2 connected to the external antenna 1 is connected to 03.

Further, corresponding to the ground terminals 25a, 25b ... Of the mobile phone housing 10 shown in FIG. 1, the conductor plate 201 has a plurality of ground terminals 211a, 211b, 211c, 211d each made of a conductive material. Is planted. The plurality of ground terminals 211a, 211b,
211c and 211d are connected to the ground conductor, and when the antenna coupling device is mounted on a vehicle, they are connected to a metal chassis portion of the vehicle.

[Usage State of First Embodiment] Next, the operation of the first embodiment of the present invention will be described with reference to FIG.

Mobile phone housing 10 as shown in FIG.
However, in the antenna coupling device 200G as shown in FIG. 3, both ground terminals 25a, 25b ...
11b, 211c and 211d are in contact with each other, and as shown in FIG. 4, the connection pin 203 is exposed through the connection window 33w of the protective cover 33.
It is placed so as to be in contact with 2.

As a result, the support conductor 32 and the external antenna 1 are connected to each other via the connection pin 203 and the coaxial feeder line 2.

In FIG. 4, the knob portion 42t of the monopole antenna system is the protective cover 33 of the helical antenna system.
In this state, the monopole antenna system is housed, as shown in FIG. As described above, in this housed state, the support conductor 32 of the helical antenna system includes the metal fitting 101 for mounting the antenna and the feeding spring 2.
4 and the matching circuit 23, the support conductor 32 is connected to the RF circuit 22 and forms a feeding path to the helical conductor 31.

As a result, in the state as shown in FIG.
The RF circuit of the mobile phone includes a support conductor 32 and a connection pin 20.
It is electrically connected to the external antenna 1 via 3 and the coaxial feed line 2, and the transmission loss to the external antenna 1 is significantly reduced as compared with the case of the electromagnetic coupling as described above. In other words, the effective radiated power from the external antenna 1 is remarkably increased, and good wireless communication quality can be secured.

Further, in the state shown in FIG. 4, unnecessary radiation from the helical conductor 31 is relatively reduced, and the radiation characteristics are less likely to be affected by the peripheral parts of the connecting portion.

In addition, as described above, the ground terminals 25a, 25b ...; 211a to 211d of both the housing 10 of the mobile phone and the antenna coupling device 200G are in contact with each other, and the mobile phone and the antenna coupling device 2 are connected.
There is no difference between the ground potentials of both 00G and the radiation characteristics do not become unstable even when the external antenna 1 is attached, and good wireless call quality can be stably maintained.

[Second Embodiment] Another embodiment of the portable radio apparatus and the antenna coupling apparatus according to the present invention will be described below with reference to FIGS.

[Structure of Second Embodiment] FIG. 5 shows the structure of the essential parts of another embodiment of the portable radio apparatus of the present invention, and also shows the structure of the embodiment of the antenna coupling apparatus of the present invention. As shown in FIG. In FIG. 5, parts corresponding to those in FIGS. 12 to 14 showing the already proposed composite antenna are denoted by the same reference numerals and a part of the description thereof will be omitted, and in FIG. Corresponding parts are designated by the same reference numerals and part of the description is omitted.

In the embodiment of FIG. 5, the support conductor 32r of the helical conductor 31 is provided on the back side of the protective cover 33 attached to the upper surface of the housing 10 of the mobile phone via a spacer (not shown). A connection window 33w is formed so as to partially expose the antenna support fitting 35 that faces the antenna. Further, in the embodiment of FIG. 5, a connection groove 35g is engraved on the exposed portion of the antenna support fitting 35.

On the other hand, as shown in FIG. 6, in the antenna coupling device 200S of the present invention, as in the antenna coupling device 200G shown in FIG. 1, the elastic force is applied to the center of the spacer 202 embedded in the conductor plate 201. A connection pin 203 made of a conductive material is provided, and an internal conductor of the coaxial feeder line 2 connected to the external antenna 1 is connected to the pin 203.

Further, the portable telephone housing 1 shown in FIG.
0 corresponding to the ground terminals 25a, 25b ...
1d is planted.

In the embodiment of FIG. 6, the conductor plate 2
A holding member 212, which is made of an appropriate insulating material and has a “U” -shaped cross section, is arranged at the end of 01 aligned with the connection pin 203. The distance between the holding member 212 and the connection pin 203 is
In the intermediate state of the already proposed composite antenna as shown in FIG. 14, the distance between the upper end 52a of the knob member 52 and the upper end of the support fitting 35 is set to be substantially equal.

A conductor plate 201 is provided on the holding member 212.
A holding groove 212g is formed in the width direction of the conductor plate 201.
One end face 212a is formed on the end edge side of the holding member 21 and two end faces 212b and 212c are formed on the side of the connecting pin 203 that is apart from the holding groove 212g.
2 is formed in a three-pronged shape.

[Used State of Second Embodiment] Next, the operation of the embodiment of FIGS. 5 and 6 will be described with reference to FIG.

A mobile phone casing 10 as shown in FIG.
However, in the antenna coupling device 200S as shown in FIG. 6, both ground terminals 25a, 25b ...
11b, 211c and 211d are in contact with each other, and as shown in FIG. 7, the connection pin 203 is exposed through the connection window 33w of the protective cover 33.
5 is placed so as to face the connection groove 35g.

As a result, the support fitting 35 and the external antenna 1 are stably and electrically connected to each other via the connection pin 203 and the coaxial feeder line 2.

Further, in the antenna coupling device 200S of the embodiment shown in FIG. 6, the three-forked holding member 212 as described above is used.
Is provided, and as shown in FIG.
The casing 10 of the mobile phone is placed so that the upper end portion 52a of the knob member 52 engages with 2g.

As described above, the support fitting 35 of the helical antenna system as shown in FIGS. 12 to 14 is connected to the RF circuit 22 through the fitting 101 for mounting the antenna, the feeding spring 24 and the matching circuit 23. However, the support fitting 35 forms a power feeding path to the linear conductor 41 or the helical conductor 31 in accordance with the pulled-out state or the housed state.

In FIG. 7, the knob portion 52a of the monopole antenna system is the protective cover 33 of the helical antenna system.
Since the connecting conductor 51 and the support fitting 35 are not in contact with each other as shown in FIG. 14 in this state, the fitting 101, the feeding spring 24 and the matching circuit 23 are separated from the fitting 35. A feeding path reaching the RF circuit 22 is not formed via the helical conductor 31, and the helical conductor 31 does not function as an antenna.

Further, in this state, the support fitting 35 does not contact the support conductor 43 of the monopole antenna system, and the linear conductor 41 includes the fitting 101, the feeding spring 24 and the matching circuit 2.
Since the power is not supplied from the RF circuit 22 through 3, the linear conductor 41 also does not function as an antenna.

Therefore, in the state shown in FIG.
5, it is electrically connected only to the external antenna 1 via the connection pin 203 and the coaxial feeder line 2.

As a result, in the state as shown in FIG.
The RF circuit of the mobile phone includes the support fitting 35 and the connection pin 20.
3 is electrically connected to the external antenna 1 via the coaxial feed line 2 and the transmission loss up to the external antenna 1 is significantly reduced as compared with the case of electromagnetic coupling as described above. Compared to the case where all the high frequency power of the RF circuit of the mobile phone is supplied only to the external antenna 1 and the helical conductor 31 and the external antenna 1 are fed in parallel as shown in FIG. The supplied high-frequency power is further increased, and better wireless call quality can be secured.

In the state shown in FIG. 7, the radiation from the helical conductor 31 is not generated at all, and since it is directly electrically connected to the external antenna 1, it is as if electromagnetically coupled. Moreover, the characteristics will not be affected by the peripheral parts of the connecting portion.

In addition, as described above, the ground terminals 25a, 25b, ... 211a to 211d of both the housing 10 of the mobile phone and the antenna coupling device 200S are in contact with each other, and the housing 10 of the mobile phone and the antenna. There is no difference in the ground potentials of both of the coupling devices 200S, and even when the external antenna 1 is attached, the radiation characteristics do not become unstable, and good wireless call quality can be stably maintained.

[Third Other Embodiment] In the above-described embodiments, the protective cover 33 is provided with the connection window 33w, and the support conductor 32 or the support fitting 35 is always exposed although it is partially. To be done. As described above, the support conductor 32 or the support fitting 35 is a conductive member that forms a power feeding path to the antenna, and is preferably not exposed when the mobile phone is used alone.

Therefore, in the embodiment of FIG. 8, coaxially with the outside of the protective cover 33, such as an elastomer,
The outer cover 36 made of an appropriate insulating material is rotatably engaged to protect the exposed portion of the support conductor 32 or the support fitting 35 when the mobile phone is used alone.

The outer cover 36 is provided with a connection window 36w having substantially the same size as that of the connection window 33w of the protective cover 33, so that the antenna coupling device of the embodiment of FIG. When the sheet is placed, the outer cover 36 is appropriately rotated so that its connection window 36w is aligned with the connection window 33w of the protective cover 33.

Although the protective cover 33 is provided with the connection window 33w in each of the above-described embodiments, it is provided in the vicinity of another conductive member forming a power feeding path to the antenna, such as the power feeding spring 24. A connection window may be formed in the housing 10 of the mobile phone so that the power supply spring 24 and the like and the connection pin 203 of the antenna coupling device can be stably connected mechanically and electrically.

In the embodiment shown in FIG. 1 described above, a metal pin which is connected to the ground pattern of the circuit board 21 in a direct current manner is used as the ground terminal on the side of the mobile phone. When the metal screw for fixing 21 to the housing 10 is connected to the ground pattern in a direct current manner, this screw may be used as the ground terminal on the mobile phone side.

Alternatively, instead of the ground terminal on the mobile phone side, a conductor having a ground potential, such as a shield case (not shown) in the high frequency circuit portion, is used for the housing 1.
It may be partially exposed from the zero connection window 102.

Although the embodiment in which the present invention is applied to the vehicle-mounted antenna coupling device has been described above, the present invention can be similarly applied to the antenna coupling device for a fixed external antenna. it can.

[0094]

As described above, according to the present invention, the transmission loss from the RF circuit of the mobile phone to the external antenna is remarkably reduced as compared with the case of electromagnetic coupling, and the radiation is radiated from the external antenna. The high frequency power is remarkably increased, and good wireless communication quality can be secured.

Further, the radiation characteristics are less likely to be affected by the peripheral parts of the connecting portion.

In addition, there is no difference in the ground potentials of both the mobile phone and the antenna coupling device, and even when an external antenna is attached, the radiation characteristics do not become unstable, and good radio communication quality is maintained stable. can do.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of an embodiment of a portable wireless device and an antenna coupling device according to the present invention.

FIG. 2 is a perspective view showing a configuration of a main part of the embodiment of the present invention.

FIG. 3 is a perspective view showing the configuration of another main part of the embodiment of the present invention.

FIG. 4 is a perspective view for explaining the operation of the embodiment of the present invention.

FIG. 5 is a perspective view showing a configuration of a main part of another embodiment of the present invention.

FIG. 6 is a perspective view showing the configuration of another main part of another embodiment of the present invention.

FIG. 7 is a perspective view for explaining the operation of another embodiment of the present invention.

FIG. 8 is a perspective view showing a configuration of a main part of still another embodiment of the present invention.

FIG. 9 is a front view for explaining the present invention.

FIG. 10 is a cross-sectional view showing a configuration example of a conventional antenna.

11 is a cross-sectional view for explaining the operation of the antenna of FIG.

FIG. 12 is a cross-sectional view showing a configuration example of an already proposed antenna.

13 is a sectional view for explaining the operation of the antenna of FIG.

14 is a sectional view for explaining the operation of the antenna of FIG.

FIG. 15 is a conceptual diagram for explaining the present invention.

FIG. 16 is a perspective view showing a configuration example of an already proposed antenna coupling device.

[Explanation of symbols]

1 External Antenna 2 Coaxial Feed Line 10 Mobile Phone Case 22 RF Circuit 23 Matching Circuit 24 Feed Spring 25, 211 Ground Terminal 30, 30S Helical Antenna System 31 Helical Conductor 32, 32r Support Conductor 33 Protective Cover 33w, 36w Connection Window 35 Support Metal fitting 36 Outer cover 40, 40S Monopole antenna system 41 Wire conductor 43 Supporting conductor 101 Mounting metal fitting 102 Connection window 200G, 200S Antenna coupling device (vehicle adapter) 203 Connection pin 212 Holding member

Front page continued (72) Inventor Shinichi Kuroda 6-735 Kitashinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (8)

[Claims] 1. A portable wireless device comprising an antenna, a high-frequency circuit in a housing, and a power feeding member for forming a power feeding path between the antenna and the high-frequency circuit, wherein the power feeding member is partially provided. A portable wireless device, which is provided with an opening for exposing to the outside. 2. A portable radio comprising an antenna, a high frequency circuit, a power feeding member forming a power feeding path between the antenna and the high frequency circuit, and an opening partially exposing the power feeding member to the outside. A mounting portion of the device, an external antenna, a power supply line connected to the external antenna, a power supply line, and the portable wireless device when the mobile wireless device is mounted on the mounting part. A connection conductor that is inserted into the opening of the wireless device and directly contacts the power feeding member to make an electrical connection; and the high frequency circuit of the portable wireless device via the connection conductor and the power supply line. And an external antenna for coupling the antenna to the antenna coupling device. 3. A portable wireless device comprising: an antenna; a high frequency circuit in a housing; a power feeding member for forming a power feeding path between the antenna and the high frequency circuit; and a reference potential conductor in the housing. A portable radio device, wherein an opening for partially exposing the reference potential conductor is provided in the housing. 4. A mounting portion of a portable wireless device, wherein an opening is provided in the housing for incorporating an antenna and partially exposing a reference potential conductor, an external antenna, and a feed connected to the external antenna. An antenna coupling device comprising an electric wire and coupling the high-frequency circuit of the portable wireless device and the external antenna through the power supply line, the antenna coupling device being connected to a ground conductor and being placed on the mounting part. A conductive member, which is inserted into the opening of the portable wireless device when the portable wireless device is placed and is in direct contact with the reference potential conductor for electrical connection, is provided in the mounting portion. A characteristic antenna coupling device. 5. The antenna has a plurality of radiating conductors that can be switched, and any one of the plurality of radiating conductors can be turned off by the switching operation.
Alternatively, the mobile wireless device according to claim 3. 6. A holding member for holding an operating member for the switching operation is arranged at a position on the mounting portion where all of the plurality of radiation conductors of the antenna are in a non-power supply state by the switching operation. The antenna coupling device according to claim 2 or 4. 7. The antenna is housed in a protective case fixed to the outside of the casing, a tubular member is rotatably provided outside the protective case, and the antenna is mounted on the tubular member. The mobile wireless device according to claim 1 or 3, wherein an opening corresponding to the opening of the protective case is formed. 8. The antenna coupling device according to claim 2, wherein the external antenna is a vehicle-mounted antenna.