JPH0918216A - Antenna device and portable radio talking device - Google Patents

Abstract

PURPOSE: To draw out a 1st antenna by the weak force, to eliminate the breakage of antenna when they are drawn out, and to draw out the antennas by the hand holding a portable radio talking device for an antenna device which has the 1st and 2nd antennas to draw out the 1st antenna in a talking state and to store the 1st antenna in a portable state respectively. CONSTITUTION: An antenna device 100 provided with the antennas 101 and 102 is rotatably attached to the side face 201a of a casing 201 via a fixing screw 107 at a connection part 110. A winding spring 120 is fitted into the spring 107. An operation button 213 is depressed to turn the device 100 by the expanding force of the spring 120 in the direction where the antenna 101 is drawn out of the casing 201 and the antenna 102 is stored in the casing 201 respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device used in a portable radio communication device such as a mobile phone and a portable radio communication device such as a mobile phone.

[0002]

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

An arcuate protrusion 10c is formed on the left side of the upper part of the casing 10 in order to prevent the telephone from being dropped off while the telephone is in use, and is in contact with the peripheral edge of the protrusion 10c. Thus, the operation knob 17 for function control is provided.

On the top surface 10t of the casing 10, a flexible monopole antenna having a length of ¼ of the wavelength λ corresponding to the transmission / reception frequency, that is, a so-called whip antenna 1 is provided.
The whip antenna 1 is attached so that the whip antenna 1 can be stored therein, and the whip antenna 1 is pulled out from the inside of the housing 10 at the time of use.

In this way, when the antenna device is used as the whip antenna 1 and the mobile phone is carried, the whip antenna 1 is housed in the housing 10 to make the mobile phone a convenient shape for carrying and the antenna. It is possible to prevent the device from being damaged and, at the time of a call, pull out the whip antenna 1 from the inside of the housing 10 to increase the length as an antenna element, thereby suppressing the influence of the human body, particularly the head, and making a call. The quality can be improved.

However, in this case, when the whip antenna 1 is housed in the housing 10, the whip antenna 1 is arranged in the vicinity of the ground conductor, and the input impedance of the antenna element increases, and the antenna element Will not be matched, and the antenna gain will be significantly reduced.

Therefore, in order to improve the antenna gain when the whip antenna is housed in the housing,
As shown in FIG. 2, a so-called top loading type whip antenna device in which a helical antenna 4 having an electric length of approximately λ / 4 is directly connected to the tip of the monopole antenna 3 has come to be used.

In this top loading type whip antenna device, as shown in FIG. 1A, when the monopole antenna 3 is pulled out from the inside of the housing 10,
As shown by the arrow, power is fed from the transmission / reception circuit 22 to the base of the monopole antenna 3, and the monopole antenna 3 and the helical antenna 4 act as one antenna element.

Further, as shown in FIG. 1B, when the monopole antenna 3 is housed in the housing 10, power is supplied from the transmission / reception circuit 22 to the tip of the monopole antenna 3 as indicated by an arrow. , Mainly the helical antenna 4 acts as an antenna element, and a certain amount of antenna gain is obtained.

However, in the top loading type whip antenna device shown in FIG. 14, the input impedance of the antenna element greatly changes between when the monopole antenna 3 is pulled out and when the monopole antenna 3 is housed, which makes the design of the antenna device difficult. At the same time, when the monopole antenna 3 is housed, there is a drawback that unwanted radiation is generated from the antenna part housed in the housing 10 to the high frequency circuits in the vicinity.

Therefore, as a modification of the top loading type whip antenna device, the monopole antenna and the helical antenna are mechanically coupled, but when the monopole antenna is stored, the monopole antenna is electrically separated from the helical antenna. Thus, there has been considered a device in which only the helical antenna acts as an antenna element.

FIG. 15 shows an example of such an improved top loading type whip antenna device. FIG. 15A shows a state in which a monopole antenna is pulled out from the housing, and FIG. 15B shows a monopole antenna. This is a state in which the pole antenna is housed in the housing.

A cylindrical mounting member 11a is incorporated in a housing 10 of a mobile phone or the like, and a cylindrical supporting member 11b is also mounted inside the mounting member 11a.
A circuit board (printed wiring board) 21 is housed inside the housing 10, and circuits such as a transmission / reception circuit 22 and a matching circuit 23 are mounted on the circuit board 21. Then, the feeding (power-supplied) spring 24 is connected to and attached to the matching circuit 23, and the feeding spring 24 is brought into contact with the fitting 11a.

The monopole antenna 30 has a linear conductor 31 having an electric length of approximately λ / 4, and the entire conductor 31 is covered with a dielectric layer 32. A cylindrical support conductor 33 is coupled to the lower end of the conductor 31, and a locking metal fitting 34 having a larger diameter is coupled to the lower end of the support conductor 33.
A columnar separating member 51 made of an insulating material is mechanically coupled to the upper end of the conductor 31.

The helical antenna 40 has an electrical length of approximately λ.
/ 4 helical conductor 41, and the helical conductor 41
The lower end of is wound around the support conductor 42 having a T-shaped cross section,
Protective case 4 in which the entire helical conductor 41 is made of an insulating material
It is stored in 3.

The separating member 51 and the supporting conductor 42 of the helical antenna 40 are mechanically coupled to each other, so that the monopole antenna 30 and the helical antenna 40 are mechanically integrated.

The diameters of the support conductor 33 of the monopole antenna 30 and the support conductor 42 of the helical antenna 40 are made equal to the inner diameter of the support fitting 11b, and the monopole antenna 30, the helical antenna 40, and the separating member 51 are attached to the housing 10. Slidably supported.

With this structure, as shown in FIG. 15A, when the monopole antenna 30 is pulled out from the housing 10, the support conductor 33 of the monopole antenna 30 comes into contact with the support fitting 11b. From the transmission / reception circuit 22, power is supplied to the conductor 31 of the monopole antenna 30 through the matching circuit 23, the feeding spring 24, the mounting fitting 11a, the support fitting 11b, and the support conductor 33, and only the monopole antenna 30 acts as an antenna element. To do.

As shown in FIG. 1B, when the monopole antenna 30 is housed in the housing 10, the support conductor 42 of the helical antenna 40 comes into contact with the support fitting 11b, so that the transmission / reception circuit 22 receives it. , The matching circuit 23, the feeding spring 24, the mounting fitting 11a, the support fitting 11b, and the support conductor 42, the helical conductor 4 of the helical antenna 40.
1 is fed, and only the helical antenna 40 acts as an antenna element.

FIG. 16 shows another example of the improved top loading type whip antenna device, and FIG.
The state in which the monopole antenna is pulled out from the inside of the housing, and FIG. 1B shows the state in which the monopole antenna is housed inside the housing.

In this example, the support conductor 42r of the helical antenna 40 is formed in an annular shape, and is provided on the upper ends of the mounting bracket 11a and the supporting bracket 11b via the annular spacer 11c made of an insulating material, and the helical antenna. 40
Are fixed to the housing 10. An opening 43a is formed on the upper surface of the protective case 43.

A columnar connecting conductor 52 is joined to the upper end of the separating member 51 which is joined to the upper end of the conductor 31 of the monopole antenna 30, and a cross-section T made of an insulating material is attached to the upper end of the connecting conductor 52. A character-shaped operation knob 53 also serving as a locking portion is coupled.

Connection conductor 52 and monopole antenna 3
The diameter of the support conductor 33 of 0 is made equal to the inner diameter of the support fitting 11b, and the operation knob 53, the connection conductor 52, and the separating member 5
The 1 and the monopole antenna 30 are slidably supported by the housing 10.

The monopole antenna 30 is inserted through the opening 43a of the protective case 43 of the helical antenna 40, and is mechanically independent of the helical antenna 40 and coaxially arranged with the helical antenna 40. Other configurations are the same as the example of FIG.

With this structure, as shown in FIG. 16A, when the monopole antenna 30 is pulled out from the housing 10, the support conductor 33 of the monopole antenna 30 comes into contact with the support fitting 11b. From the transmission / reception circuit 22, power is supplied to the conductor 31 of the monopole antenna 30 through the matching circuit 23, the feeding spring 24, the mounting fitting 11a, the support fitting 11b, and the support conductor 33, and only the monopole antenna 30 acts as an antenna element. To do.

Further, as shown in FIG. 2B, when the monopole antenna 30 is housed in the housing 10, the support conductor 42r of the helical antenna 40 contacts the connection conductor 52, and the connection conductor 52 is In contact with the support fitting 11b,
Power is supplied from the transmission / reception circuit 22 to the helical conductor 41 of the helical antenna 40 via the matching circuit 23, the feeding spring 24, the mounting metal fitting 11a, the supporting metal fitting 11b, the connecting conductor 52 and the supporting conductor 42r, and only the helical antenna 40 is an antenna element. Acts as.

[0027]

According to the improved conventional top loading whip antenna device shown in FIG. 15 or 16 and described above, the monopole antenna 30 is used.
Since only the monopole antenna 30 acts as an antenna element when the antenna is pulled out from the housing 10, and only the helical antenna 40 acts as an antenna element when the monopole antenna 30 is housed in the housing 10. The input impedance of the antenna element does not change so much between when the monopole antenna 30 is pulled out and when the monopole antenna 30 is stored, and the design of the antenna device is relatively simple.
There is no generation of unwanted radiation from the antenna portion housed inside.

However, the conventional improved top-loading whip antenna device shown in FIG. 15 or FIG. 16 or a portable radio communication device such as a mobile phone using the whip antenna device has a monopole antenna 30 as a casing. When pulling out from inside 10, the housing 10 is held with one hand.
The helical antenna 40 or the operation knob 53 must be pulled up with the other hand while gripping the object. A relatively strong force is required when the monopole antenna 30 is pulled out, and the antenna device may be damaged. There is also a drawback that both hands are blocked.

Therefore, the present invention has a first antenna such as a monopole antenna and a second antenna such as a helical antenna used in a portable radio communication device such as a mobile phone, and carries the portable radio communication device. When you do
By accommodating the first antenna in the portable wireless communication device, the portable wireless communication device can be made into a shape convenient for carrying, and the antenna device can be prevented from being damaged.
By operating only the second antenna as an antenna element, unnecessary radiation from the first antenna housed in the mobile wireless communication device can be prevented, and the first antenna can be removed from the mobile wireless communication device during a call. By pulling out and increasing the length as an antenna element,
In an antenna device capable of suppressing the influence of the human body, particularly the head, to improve communication quality, and a portable wireless communication device such as a mobile phone using such an antenna device, a pull-out operation of the first antenna is performed. It is possible to easily perform with a weak force, there is no possibility of damaging the antenna device during the pulling-out operation, and the pulling-out operation can be performed with the hand holding the portable wireless communication device.

[0030]

In the present invention, as an antenna device, first and second antennas that operate at the same frequency and have mutually different element lengths, and the first and second antennas are provided. A connecting portion that mechanically connects is provided, and the connecting portion is used as a center of rotation, and the first and second
Of the antenna is integrally rotatable between a first rotation position and a second rotation position, and in the first rotation position, the first antenna acts as an antenna element, In the rotation position of 2, the second antenna acts as an antenna element.

Further, according to the present invention, the antenna device configured as described above is provided as a portable radio communication device.

[0032]

In the antenna device and the portable radio communication device of the present invention configured as described above, at the time of a call, the first and second antennas are integrally rotated to the first rotation position so that the element The first antenna having a large length is pulled out from the mobile wireless communication device, and the second antenna having a small element length is housed in the mobile wireless communication device. Then, the extracted first antenna acts as an antenna element, thereby increasing the length of the antenna element. Therefore, the influence of the head of the human body is suppressed, and the communication quality is improved.

Further, when carrying the portable radio communication device, the first and second antennas are integrally rotated to the second rotation position, so that the first element having a large length is provided.
While the antenna of is stored in the mobile wireless communication device,
A second antenna with a small element length is pulled out from the mobile wireless communication device. Then, only the extracted second antenna acts as an antenna element. Therefore, the portable radio communication device has a convenient shape for carrying, the antenna device is prevented from being damaged, and unnecessary radiation from the first antenna housed in the portable radio communication device is prevented.

By integrally rotating the first and second antennas in this way, the first antenna having a large element length can be pulled out from the portable radio communication device during a call. The operation of pulling out the first antenna can be easily performed with a weak force, and there is no fear of damaging the antenna device during the pulling operation.

Further, for example, when the operating portion provided on one side surface of the portable radio communication device is pushed, the first and second antennas are rotated to the first rotational position by the force of the spring. The operation of pulling out the first antenna can be performed by the hand holding the portable wireless communication device.

[0036]

【Example】

[First Example of Invention of Claim 1 ... FIGS. 1 and 2] FIG.
2 shows an example of the antenna device of the invention of claim 1, and FIG.
Shows an example of a portable wireless communication device using the antenna device. However, FIG. 1 shows an exploded view of the antenna device, and FIG. 2 shows only the housing and the antenna device of the portable wireless communication device.

As shown in FIG. 1, in the antenna device 100 of this example, a film-shaped flexible dielectric substrate 1 is used.
03, the first antenna 101 and the second antenna 102
Is formed.

The first antenna 101 has a linear shape, and the second antenna 102 has a zigzag shape. Also, the element length L1 of the first antenna 101
Then, the element lengths L2 of the second antenna 102 are made different from each other, and L1> L2. However, the operating frequency of the first antenna 101 and the operating frequency of the second antenna 102 are the same.

This is because the first antenna 101 acts as a monopole antenna, while the second antenna 102 acts by shortening the wavelength by folding back and shortening the element length. Is.

On the dielectric substrate 103, the end portions of the first antenna 101 on the side of the second antenna 102 and the end portions of the second antenna 102 on the side of the first antenna 101 are provided with contact portions 101a and 101a, respectively. 102b is formed. A portion 103c of the dielectric substrate 103 between the contact portions 101a and 102b serves as a connecting portion that mechanically connects the first antenna 101 and the second antenna 102.

The dielectric substrate 103 is provided with non-conductive plate-shaped covers 104 and 105 which sandwich and protect the dielectric substrate 103. Peripheries of the covers 104 and 105 facing the connecting portion 103c of the dielectric substrate 103 are arcuate.

Antennas 101 and 10 on the dielectric substrate 103
In the cover 104 facing the surface on which the 2 is formed, the window holes 104a,
104b is formed, and the power supply terminals 106a and 106b made of metal in the shape of a leaf spring and contacting the contact portions 101a and 102b are inserted and fixed in the window holes 104a and 104b, respectively. The power supply terminal includes the meaning of a terminal for supplying power to a certain object and the meaning of a terminal for supplying power from a certain object.

Dielectric substrate 103 and covers 104, 1
No. 05 has round holes 103e, 104e, and 105 at the centers of the connecting portion 103c and the portion facing the connecting portion 103c, respectively.
e is formed.

Then, the dielectric substrate 103 and the cover 1
04 and 105, covers 104 and 105 are dielectric substrates 1
The antenna device 100 is attached so as to sandwich 03.
And the fixing screw 107 has round holes 105e, 10
The antenna device 100 is attached to the mobile wireless communication device by being inserted into the mobile communication device and inserted into the housings 3e and 104e.

In this case, the fixing screw 107 is provided with a spring property on the side in contact with the antenna device 100, and when the fixing screw 107 is attached to the housing of the portable radio communication device, the antenna device 100 is fixed. Although it cannot be removed, the antenna device 100 can be fixed to the portable wireless communication device with a strength such that it can be rotated.

However, by providing a bearing mechanism between the fixing screw 107 and the antenna device 100,
The antenna device 100 may be rotatable.

As shown in FIG. 2, the antenna device 100
The fixing screw 107 inserted into the round hole 110e of the connecting portion 110 is located on one side surface of the non-metal housing 201 of the mobile wireless communication device, for example, on the right side when viewed from the front of the mobile wireless communication device. By being attached to the upper part, it is attached to the portable wireless communication device. Mobile wireless communication device,
The housing 201 is a general one having a metal housing in which various circuits are housed, and the metal housing serves as an antenna ground terminal.

The antenna device 100 is shown in FIG.
Even when the first antenna 101, which is a monopole antenna, is housed in the housing 201 side in the second rotation position as shown in FIG. 2, the second antenna 102 is projected from the metal housing. The mounting position is determined.

Then, during a call, as shown in FIG. 9A, the antenna device 100 is rotated to the first rotation position to pull out the first antenna 101, which is a monopole antenna, from the housing 201 side. With the second
The antenna 102 is stored in the housing 201 side. As a result, at the time of a call, the transmission / reception circuit 2 via the power feeding line 206
03 is connected to the power feeding terminal 207,
It contacts the power supply terminal 106a desired for a.

Therefore, during a call, the transmitting / receiving circuit 20
3, the feeding line 206, the feeding terminal 207, the feeding terminal 1
Power is supplied to the first antenna 101 through the contact point part 106a and the contact point part 101a, and only the first antenna 101, which is a monopole antenna, acts as an antenna element.

When carrying the portable radio communication device, the first antenna, which is a monopole antenna, is rotated by rotating the antenna device 100 to the second rotation position as shown in FIG. 101 is housed in the housing 201 side, and the second antenna 102 is pulled out from the housing 201 side. As a result, when carrying the portable wireless communication device, the power supply terminal 207 comes into contact with the power supply terminal 106b desired in the window hole 104b.

Therefore, when carrying the portable radio communication device, the power feeding line 206, the power feeding terminal 207, the power feeding terminal 106b, and the above-mentioned contact portion 10 are transmitted from the transmitting / receiving circuit 203.
Power is fed to the second antenna 102 via 2b,
Only the antenna 102 of 1 operates as an antenna element.

In order to hold the antenna device 100 in the first and second rotation positions, for example, the cover 104,
105 and the supporting part of the casing 201 are provided with unevenness,
When the antenna device 100 comes to the first and second rotational positions, a click feeling may be generated at each position. Further, the antenna device 100 can be held in the first and second rotation positions by a spring, a magnet, or the like.

In the above example, the first and second antennas 101 and 102 may be formed of, for example, a conductor foil or a linear conductor itself, instead of forming a conductor layer on the dielectric substrate 103. it can. However,
In order to prevent breakage or deformation of the antenna, it is desirable that the antenna has a certain degree of restoring force.

The covers 104 and 105 can also be formed by a method such as integral molding using a mold, as long as they have a certain degree of strength and restoring force and can prevent the deformation and damage of the antenna. .

The first and second antennas 101,
102 are not necessarily arranged in a straight line,
It may be arranged at an angle. Further, the antenna device 100 does not necessarily have to be held perpendicular to the mobile wireless communication device in the first and second rotational positions.

[Second Example of the Invention of Claim 1 ... FIGS. 3 and 4] FIG. 3 shows another example of the antenna device of the invention of claim 1, and FIG. 4 uses the antenna device. 1 shows an example of a mobile wireless communication device.

As shown in FIG. 3A, in the antenna device 100 of this example, the first antenna 101 is formed of a linear conductor having a linear shape, and the linear conductor having a coil shape is used. The second antenna 102 is formed.

As in the example of FIG. 1, the first antenna 101
The element length L1 and the element length L2 of the second antenna 102 are different from each other, and L1> L2.
However, as in the example of FIG. 1, the operating frequency of the first antenna 101 and the operating frequency of the second antenna 102 are the same.

This is because the first antenna 101 acts as a monopole antenna, while the second antenna 102 has a coil shape to shorten the wavelength and shorten the element length. , To act as a helical antenna.

First and second antennas 101 and 1
02 is covered by non-conductive tubular covers 108 and 109, respectively, which protect it.

First and second antennas 101 and 1
02 is mechanically connected by the connecting part 110. The connecting portion 110 is, for example, a cover 1 made of a film-shaped dielectric substrate 111 and an insulating material as shown in FIG.
12, 113 and covers 112 and 113 are dielectric substrates 1
It is configured by laminating 11 together.

On the dielectric substrate 111, the contact portion 101a forming the end portion of the first antenna 101 on the second antenna 102 side and the end portion of the second antenna 102 on the first antenna 101 side are formed. The constituent contact portion 102b is formed. Of course, the contact portions 101a and 102b are also electrically connected to the linear conductors that form the first and second antennas 101 and 102, respectively.

Contact portions 101a, 10 of the dielectric substrate 111
The cover 112 facing the surface on which 2b is formed has a window hole 112 at a position facing the contact portions 101a and 102b.
a, 112b are formed, and these window holes 112a, 112 are formed.
In b, the power supply terminals 106a and 106 made of leaf-spring-shaped metal and contacting the contact portions 101a and 102b, respectively.
b is inserted and fixed.

Dielectric substrate 111 and covers 112, 1
Round holes 111e, 112e, and 113e are formed at the centers of the holes 13, respectively. That is, the connecting portion 110 has a round hole 110e formed at the center thereof.

Then, the fixing screw 107 is connected to the connecting portion 11
The antenna device 100 is inserted into the circular hole 110e of 0 and attached to the housing of the portable wireless communication device.
Is attached to the portable wireless communication device. In this case,
Similarly to the above example, when the fixing screw 107 is attached to the housing of the mobile wireless communication device, the antenna device 100 cannot be removed, but the antenna device 100 is fixed to the mobile wireless communication device with a strength that allows rotation. To be able to.

As in the example of FIG. 2, as shown in FIG. 4, in the antenna device 100, the fixing screw 107 is located on one side of the non-metal housing 201 of the portable wireless communication device, for example, portable wireless communication. It is attached to the portable wireless communication device by being attached to the upper part of the right side surface when viewed from the front of the device. The housing 201 has a metal housing containing various circuits, and the metal housing serves as an antenna ground terminal.

In the antenna device 100, this is shown in FIG.
Even when the first antenna 101, which is a monopole antenna, is housed in the housing 201 side in the second rotation position as shown in FIG. The mounting position is determined so as to project from the.

During a call, as shown in FIG. 9A, the antenna device 100 is rotated to the first rotation position to pull out the first antenna 101, which is a monopole antenna, from the housing 201 side. In addition, the second antenna 102, which is a helical antenna, is attached to the housing 201.
Store on the side. As a result, during a call, the power supply line 20
Power supply terminal 20 connected to the transmission / reception circuit 203 via
7 contacts the power supply terminal 106a facing the window hole 112a of the connecting portion 110.

Therefore, at the time of a call, the transmitting / receiving circuit 20
3, the feeding line 206, the feeding terminal 207, the feeding terminal 1
Power is supplied to the first antenna 101 through the contact point part 106a and the contact point part 101a, and only the first antenna 101, which is a monopole antenna, acts as an antenna element.

When carrying the portable radio communication device, the first antenna, which is a monopole antenna, is rotated by rotating the antenna device 100 to the second rotation position as shown in FIG. 101 is housed in the housing 201 side, and the second antenna 102, which is a helical antenna, is pulled out from the housing 201 side. Thereby, when carrying the portable wireless communication device, the power supply terminal 207,
The power supply terminal 1 facing the window hole 112b of the connecting portion 110
Contact with 06b.

Therefore, when carrying the portable radio communication device, the power supply line 206, the power supply terminal 207, the power supply terminal 106b, and the above-mentioned contact portion 10 are transmitted from the transmission / reception circuit 203.
Power is fed to the second antenna 102 via 2b, and only the second antenna 102, which is a helical antenna, acts as an antenna element.

The means for holding the antenna device 100 at the first and second rotational positions can be constructed in the same manner as in the example of FIG.

In the above example, the first and second antennas 101 and 102 can also be formed by a superelastic material such as Ni-Ti or a twisted wire. However, in order to prevent breakage and deformation of the antenna,
It is desirable to have a certain degree of restoring force.

The covers 108 and 109 can also be constructed by using a resin pipe or integrally molding with the antennas 101 and 102. However, the cover 10
There is no problem as long as the material of 8, 109 is non-conductive and has elasticity, but when the restoring force of the material of the antennas 101, 102 is weak, the antenna has some strength and restoring force. It must be able to prevent deformation and damage of.

Also in this example, the first and second antennas 101 and 102 do not necessarily have to be arranged in a straight line, and may be arranged at a certain angle. Further, the antenna device 100 does not necessarily have to be held perpendicular to the mobile wireless communication device in the first and second rotational positions.

[Example of Invention of Claim 2 ... FIGS. 5 and 6] FIGS. 5 and 6 show an example of an antenna device of the invention of claim 2 and an example of a portable radio communication device using the antenna device. 5 shows a state in which the antenna device is rotated to the first rotation position, and FIG. 6 shows a state in which the antenna device is rotated to the second rotation position.

The antenna device 100 of this example is different from the antenna device of the example shown in FIGS. 1 and 2 and described above from the second rotational position shown in FIG.
A winding spring 120 is provided as a means for rotating the first rotation position shown in FIG.

The coil spring 120 extends from the second rotational position to the first rotational position in the rotational direction indicated by the arrow 121 in FIG. 6 (B), and moves from the first rotational position to the second rotational position. The fixing screw 107 is fitted in such a direction as to contract in the rotation direction shown by the arrow 122 in FIG. 5B, one end of which is fixed to the non-metallic housing 201 of the mobile wireless communication device, and the other end of which is fixed. Is fixed to the connecting portion 110 of the antenna device 100.

The housing 201 has the antenna device 100.
Is attached to one side surface, for example, the right side surface 201a when viewed from the front of the mobile wireless communication device, and an operation lever 210 is rotatably attached to a lower portion thereof about a shaft 211 as a fulcrum. An antenna stopper 212 is provided at the end, and an operation button 213 is provided at the center of the operation lever 210.

In the housing 201, the operation lever 2 is arranged so that the antenna stopper 212 faces the outside of the housing 201.
A spring 220 is mounted that causes the 10 to pivot.

Further, the connecting portion 11 of the antenna device 100.
0 is the round hole 11 into which the fixing screw 107 is inserted.
0e, concentric with the semi-annular elongated hole 111, one side of the housing 201 to which the antenna device 100 is attached,
For example, the right side surface 201a viewed from the front of the mobile wireless communication device
Is provided with a pin 230 inserted into the elongated hole 111.

Then, when the antenna device 100 is in the first rotation position as shown in FIG. 5, one end 111a of the elongated hole 111 abuts against the pin 230 as shown in FIG. 6 is in the second rotation position as shown in FIG. 6, the slot 11 as shown in FIG.
The other end 111b of 1 is made to abut the pin 230.

In this example, the antenna device 1 is used during a call.
00 is in the second rotation position as shown in FIG. 6, the operation button 213 is pushed to move the operation lever 210,
6 against the biasing force of the spring 220 with the shaft 211 as a fulcrum.
Press in the direction indicated by arrow 214 in (A).

As a result, the antenna stopper 212 is inserted into the housing 201, and the antenna stopper 2 has been inserted until then.
The antenna device 100 that has been locked by 12 is caused by the force of the winding spring 120 to expand, as shown in FIG.
5 in the direction indicated by arrow 121, and stops at the first rotation position where one end 111a of the elongated hole 111 abuts the pin 230 as shown in FIG. 5B.

At this first rotational position, the first antenna 101, which is a monopole antenna, is mounted on the housing 201.
The second antenna 102 is housed in the housing 201 side while being pulled out from the side.

Therefore, the transmitting / receiving circuit 20
3, the feeding line 206, the feeding terminal 207, the feeding terminal 1
Electric power is supplied to the first antenna 101 via 06a and the contact portion 101a, and only the first antenna 101, which is a monopole antenna, acts as an antenna element.

In this case, the operating button 213 can be pressed with the ring finger or little finger of one hand while holding the housing 201 with one hand, and the operation of pulling out the first antenna 101 can be performed.
It can be easily performed by the hand holding the portable wireless communication device.

When the call ends, from the state where the antenna device 100 is in the first rotation position as shown in FIG. 5, the operation button 213 is pushed with the ring finger or little finger of one hand to insert the antenna stopper 212 into the housing 201. Then, with the other hand, the antenna device 100 is moved in the direction shown by the arrow 122 in FIG.
As shown in (B), the other end 111b of the long hole 111 has the pin 2
It is rotated to a second rotation position where it abuts 30, and the operation button 213 is released at that position.

As a result, the antenna device 100 is locked by the antenna stopper 212, and the antenna device 1
00 is held in the second rotational position. And this second
In the rotation position of, the first antenna 101, which is a monopole antenna, is housed in the housing 201 side, and
The antenna 102 is pulled out from the housing 201 side.

Therefore, when carrying the portable radio communication device, power is supplied from the transmission / reception circuit 203 to the second antenna 102 via the power feeding line 206, the power feeding terminal 207, the power feeding terminal 106b, and the contact portion 102b. Only the second antenna 102 acts as an antenna element.

The antenna stopper 212 shown in FIG.
By making the front surface of the paper surface of (A) and FIG. 6 (A), that is, the left surface of FIG. 5 (B) and FIG. 6 (B) a taper surface, the operation button 213 is pressed with one hand and the antenna stopper is pressed. Even if the 212 is not inserted into the housing 201,
With the other hand, move the antenna device 100 to the arrow 12 in FIG.
When rotated in the direction indicated by 2, the portion of the antenna device 100 on the side of the first antenna 101 is the antenna stopper 21.
The antenna stopper 212 is inserted into the housing 201 by pushing the above-mentioned tapered surface of the antenna device 1,
00 can be rotated to a second rotational position.

Although the above example uses the spiral spring 120, other types of springs can be used. As means for stopping the antenna device 100 at the first rotation position, means other than the illustrated combination of the slot 111 and the pin 230 can be used.

Further, also in this example, the second rotational position does not necessarily have to be 180 ° with respect to the first rotational position, and may be inclined with respect to the first rotational position.

[One Example of the Invention of Claim 3 ... FIG. 7] FIG.
An example of the antenna device of the invention of claim 3 will be shown.

In the example shown in FIGS. 1 and 2 or the example shown in FIGS. 3 and 4, the antenna device 100 rotates from the second rotation position to the first rotation position, and the transmitting / receiving circuit 203 side Of the power supply terminal 207 from the state in which the power supply terminal 207 is connected to the contact portion 102b through the power supply terminal 106b.
6a, when the state of being connected to the contact portion 101a via 6a
There is a period in which the antenna is not connected to any of a, and the power supply to the antenna is interrupted during that period. Therefore, FIG.
An example is when the interruption time is shortened.

That is, in the example of FIG. 7, the first antenna in which the contact portion 102b constituting the end portion of the second antenna 102 on the first antenna 101 side is concentric with the round hole 110e of the connecting portion 110 is formed. The arc shape is extended to the vicinity of the contact point portion 101a that constitutes the end portion of the 101 on the side of the second antenna 102.

According to this example, the antenna device 100 rotates from the second rotation position to the first rotation position, and the power supply terminal on the transmission / reception circuit side is connected to the contact portion 101a from the state where the power supply terminal is connected to the contact portion 102b. At the time of shifting to the state of being turned on, the time during which the power supply terminal on the transmission / reception circuit side is not connected to any of the contact portions 102b and 101a and the power supply to the antenna is interrupted becomes very short.

However, the contact portion 101a and the contact portion 102b
If the interval is too small, mutual coupling occurs between the first antenna 101 and the second antenna 102, and the antenna performance deteriorates. Therefore, the contact portion 101a and the contact portion 1
It is necessary to provide an appropriate space between the antenna 02b and the antenna 02b depending on the operating frequency of the antenna.

It should be noted that instead of the contact portion 102b, the contact portion 1
01a may have an arc shape. Also, the contact portion 101a
Both the contact portion 102b and the contact portion 102b may have an arc shape.

[Example of Invention of Claim 4 ... FIGS. 8 and 9] FIG. 8 shows an example of an antenna device of the invention of claim 4, and FIG. 9 shows a portable radio communication device using the antenna device. An example is shown.

The first antenna 101, which is a monopole antenna, is less likely to be affected by the ground and the human body when its electrical length is longer than λ / 4. However, when doing so, a matching circuit is required. Further, when the matching circuit is provided after the feeding end of the antenna, the second antenna 102 is affected. Therefore, the example of FIG. 8 is a case where a matching circuit is provided inside the first antenna 101.

That is, in the example of FIG. 8, a contact portion 101g serving as a ground terminal is provided for the first antenna 101 together with the above-mentioned contact portion 101a, and a contact portion is provided at the end of the first antenna 101. The matching circuit 131 is inserted on the side of the portion 101a and the contact portion 101
The matching circuit 132 is inserted on the g side. Each of the matching circuits 131 and 132 can be configured by a chip component such as a coil or a capacitor or by a pattern modification.

Although not shown in FIG. 8, the dielectric substrate 10
The cover 104 facing the surface on which the antennas 101 and 102 of No. 3 are formed has a position facing the contact portion 101g.
A window hole similar to the window holes 104a and 104b at positions facing the contact portions 101a and 102b shown in FIG. 1 is formed, and the contact portion 101 which contacts the contact portion 101g is formed in the window hole.
A power supply terminal made of a leaf-spring-shaped metal similar to the power supply terminals 106a and 106b in contact with a and 102b is inserted and fixed.

As shown in FIG. 9, the portable radio communication device is provided with a ground terminal 242 connected to the ground point 241 such as the above metal casing.

During a call, the antenna device 100 is rotated to the first rotation position to pull out the first antenna 101, which is a monopole antenna, from the housing 201 side, as shown in FIG. With the second
The antenna 102 is stored in the housing 201 side. As a result, at the time of a call, the transmission / reception circuit 2 via the power feeding line 206
The power supply terminal 207 connected to the contact point 03 contacts the power supply terminal 106a that contacts the contact portion 101a, and the ground terminal 242 connected to the ground point 241 contacts the power supply terminal that contacts the contact portion 101g.

Therefore, during a call, power is supplied from the transmitting / receiving circuit 203 to the first antenna 101 with the matching circuits 131 and 132 inserted in the first antenna 101, and the first antenna 101 is a monopole antenna.
Only acts as an antenna element.

When carrying the portable radio communication device, the first antenna, which is a monopole antenna, is rotated by rotating the antenna device 100 to the second rotation position as shown in FIG. 101 is housed in the housing 201 side, and the second antenna 102 is pulled out from the housing 201 side. As a result, when carrying the portable wireless communication device, the power supply terminal 207 comes into contact with the power supply terminal 106b in contact with the contact portion 102b.

Therefore, when carrying the portable radio communication device, the transmitting / receiving circuit 203 is carried out in exactly the same manner as in the example of FIG.
To the second antenna 102, and only the second antenna 102 acts as an antenna element.

As described above, in the examples of FIGS. 8 and 9, the first antenna 101 is provided with the contact portion 101g serving as a ground terminal, and the matching circuit 1 is also provided on the contact portion 101g side.
By providing 32, the degree of freedom in designing the entire matching circuit is improved, and a more appropriate matching circuit can be easily configured.

The second antenna 102 preferably has an electrical length of λ / 4. Therefore, a matching circuit is not required on the second antenna 102 side, but a matching circuit can be provided on the second antenna 102 side in some cases. Further, in some cases, the first antenna 1
The second antenna 102 is provided without a matching circuit on the 01 side.
The matching circuit may be provided only on the side.

[Example of Invention of Claim 5 ... FIGS. 10 and 11] FIG. 10 shows an example of an antenna device of the invention of claim 5, and FIG. 11 shows a portable radio communication device using the antenna device. An example is shown.

As shown in FIG. 10, in the antenna device 100 of this example, the distances d1 and d2 from the rotation center 100c to the first and second antennas 101 and 102 are made different from each other, for example, d1> d2. To be done.

As shown in FIG. 11, the portable radio communication device of this example includes a transmitting / receiving circuit 20 for the first antenna 101.
3a and a transmitting / receiving circuit 203b for the second antenna 102 are provided, and the transmitting / receiving circuits 203a and 203b are provided.
The power supply terminals 207a and 207b are connected via the power supply lines 206a and 206b, respectively.

In this case, the transmission / reception circuits 203a and 203a
3b is one method, when the antenna device 100 is rotated to the first rotation position as shown in FIG. 3A, the transmission / reception circuit 203a is selected, and the antenna device as shown in FIG. When 100 is rotated to the second rotation position, the transmission / reception circuit 203b is selected,
Make it switchable. In that case, the switching can be automatically performed by detecting the rotational position of the antenna device 100.

As another method, the transmitting / receiving circuit 203
a and 203b each have a matching circuit for the first and second antennas 101 and 102 therein, and the matching circuits are prevented from being influenced by the other transmitting / receiving circuit side. Circuits 203a and 20
3b is switched substantially according to the rotational position of the antenna device 100.

Then, at the time of a call, as shown in FIG. 9A, the antenna device 100 is rotated to the first rotation position to pull out the first antenna 101, which is a monopole antenna, from the housing 201 side. With the second
The antenna 102 is stored in the housing 201 side. As a result, during a call, the power supply terminal 207a connected to the transmission / reception circuit 203a via the power supply line 206a is connected to the contact portion 10a.
It contacts the power supply terminal 106a that is in contact with 1a.

Therefore, at the time of a call, the transmitting / receiving circuit 20
Power is supplied from 3a to the first antenna 101, and only the first antenna 101, which is a monopole antenna, acts as an antenna element.

When carrying the portable radio communication device, the first antenna, which is a monopole antenna, is rotated by rotating the antenna device 100 to the second rotation position as shown in FIG. 101 is housed in the housing 201 side, and the second antenna 102 is pulled out from the housing 201 side. As a result, when carrying the portable radio communication device, the transmission / reception circuit 203 via the power feeding line 206b.
The power supply terminal 207b connected to b contacts the power supply terminal 106b that contacts the contact portion 102b.

Therefore, when carrying the portable radio communication device, the transmitter / receiver circuit 203b causes the second antenna 102 to move.
To the second antenna 102, and only the second antenna 102 acts as an antenna element.

[One Example of the Invention of Claim 6 ... FIG. 12] FIG.
Shows an example of an antenna device of the invention of claim 6 and an example of a portable radio communication device using the antenna device.

In the antenna device 100 of this example, power is supplied to the first and second antennas 101 and 102 without direct current conduction.

That is, the power feeding terminal 106a connected to the contact point portion 101a of the first antenna 101 and the power feeding terminal 106b connected to the contact point portion 102b of the second antenna 102 are made conductive layers each having a large area, The power supply terminal 207 on the mobile radio communication device side, which is connected to the transmission / reception circuit 203 via the power supply line 206, is a large-area conductive layer formed inside the non-metallic casing 201 of the mobile radio communication device. Power supply terminal 2 of the housing 201
When the antenna device 100 is rotated to the first or second rotation position as shown in FIG. 1A or 1B, the feeding terminal 1
06a or 106b faces the power supply terminal 207 through the thin-walled portion of the housing 201 and is capacitively coupled to the power supply terminal 207.

Then, during a call, as shown in FIG. 9A, the antenna device 100 is rotated to the first rotation position to pull out the first antenna 101, which is a monopole antenna, from the housing 201 side. With the second
The antenna 102 is stored in the housing 201 side. As a result, the power supply terminal 207 is capacitively coupled to the power supply terminal 106a during a call.

Therefore, at the time of a call, the transmitting / receiving circuit 20
Power is supplied from 3 to the first antenna 101, and only the first antenna 101, which is a monopole antenna, acts as an antenna element.

When carrying the portable radio communication device, the first antenna, which is a monopole antenna, is rotated by rotating the antenna device 100 to the second rotation position as shown in FIG. 101 is housed in the housing 201 side, and the second antenna 102 is pulled out from the housing 201 side. As a result, when carrying the portable wireless communication device, the power feeding terminal 207 is capacitively coupled to the power feeding terminal 106b.

Therefore, when carrying the portable radio communication device, power is supplied from the transmitting / receiving circuit 203 to the second antenna 102, and only the second antenna 102 acts as an antenna element.

In this example, the power feeding terminals 106a, 1
The wear of 06b and 207 and the occurrence of contact failure due to foreign matter attached to the 06b and 207 are suppressed, and the antenna device 100
Durability is improved.

[Other Embodiments] An example of the portable radio communication device of the invention of claim 7 is as described above.

The electrical lengths of the first and second antennas 101 and 102 are not limited to λ / 4, but 3λ / 8 or λ.
It may be / 2 or the like.

[0131]

As described above, according to the present invention, the pull-out operation of the first antenna can be easily performed with a weak force, the antenna device is not likely to be damaged during the pull-out operation, and the pull-out operation can be performed. It is also possible to perform it by the hand holding the mobile wireless communication device.

According to the invention of claim 2, the first antenna can be pulled out by a one-touch operation such as pushing an operation button with a hand holding the portable radio communication device.

According to the third aspect of the invention, it is possible to further shorten the time during which the power supply is cut off when pulling out the first antenna, and the call quality is improved.

According to the invention of claim 4 or 5, even when the input impedances of the first and second antennas are completely different, matching is performed for each antenna so that the first antenna can be pulled out. Also, good reflection loss characteristics can be obtained both during storage and during storage.

According to the invention of claim 6, the abrasion of the feeding terminal and the occurrence of contact failure due to the foreign matter attached to the feeding terminal are further suppressed, and the durability of the antenna device is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example of an antenna device according to a first aspect of the invention.

FIG. 2 is a simplified perspective view showing an example of a portable wireless communication device using the antenna device of the example of FIG.

FIG. 3 is a perspective view showing another example of the antenna device according to the first aspect of the invention.

FIG. 4 is a simplified perspective view showing an example of a mobile radio communication device using the antenna device of the example of FIG.

5A and 5B are a cross-sectional view and a side view showing a state in which the antenna device is rotated to a first rotation position in an example of a mobile wireless communication device using the example of the antenna device according to the invention of claim 2.

6A and 6B are a cross-sectional view and a side view showing a state where the antenna device of the portable wireless communication device of the example of FIG. 5 is rotated to a second rotation position.

FIG. 7 is a plan view showing a main part of an example of an antenna device according to a third aspect of the invention.

FIG. 8 is a plan view showing a main part of an example of an antenna device according to a fourth aspect of the invention.

9 is a cross-sectional view showing an example of a mobile wireless communication device using the antenna device of the example of FIG.

FIG. 10 is a plan view showing a main part of an example of an antenna device according to a fifth aspect of the invention.

11 is a cross-sectional view showing an example of a mobile wireless communication device using the antenna device of the example of FIG.

FIG. 12 is a sectional view showing an example of a portable radio communication device using an example of the antenna device of the invention of claim 6;

FIG. 13 is a plan view showing an example of a mobile phone.

FIG. 14 is a schematic perspective view showing an example of a portable wireless communication device using an example of a top loading whip antenna device.

FIG. 15 is a cross-sectional view showing an example of a portable wireless communication device using another example of the top loading type whip antenna device.

FIG. 16 is a cross-sectional view showing an example of a portable radio communication device using still another example of the top loading type whip antenna device.

[Explanation of symbols]

 100 antenna device 101 1st antenna 101a contact part 102 2nd antenna 102b contact part 106a, 106b feeding terminal 110 connecting part 120 coil spring 131,132 matching circuit 201 housing (portable wireless communication device) 203 transmitting / receiving circuit 212 antenna stopper 213 operation buttons

Claims (7)

[Claims] 1. A first antenna and a second antenna which operate at the same frequency and have mutually different element lengths, and a connecting portion which mechanically connects the first and second antennas, With the connecting portion as the center of rotation, the first and second antennas are provided between the first rotational position and the second rotational position,
An antenna that is configured to be integrally rotatable, such that in the first rotational position the first antenna acts as an antenna element and in the second rotational position the second antenna acts as an antenna element. apparatus. 2. The antenna device according to claim 1, wherein a spring is used as a means for rotating the antenna device from the second rotational position to the first rotational position. 3. The antenna device according to claim 1, wherein at least one of the first and second antennas has a feed contact in an arc shape. 4. The antenna device according to claim 1, 2, or 3, wherein at least one of the first and second antennas has an antenna matching circuit. 5. The antenna device according to claim 1, 2, 3 or 4, wherein distances from a rotation center of the antenna device to the first and second antennas are different from each other. 6. The antenna device according to claim 1, 2, 3, 4 or 5, wherein the first and second antennas are fed with electric power without conducting DC. 7. A portable radio communication device having the antenna device according to claim 1, 2, 3, 4, 5 or 6.