JP2001196822A - Antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a high gain by reducing the influence of combination between antennas of diversity configuration. SOLUTION: In the antenna device of diversity configuration provided with a monopole antenna 102 and a built-in loop antenna 105 incorporated in the casing 107 of a mobile radio, the antenna 102 is fixed to the casing 107 in a state being conductive with this to feed power from a power feeding spring 104 to the antenna 102 thorough an antenna holder 103 formed in the size capable of minimizing the coupling amount of the antenna 102 and the antenna 105 at this fixing time.

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 for a radio device and mainly for a mobile radio device such as a portable telephone in a mobile communication system or an information terminal device having a computer function. The present invention relates to an antenna device having a structure for preventing gain deterioration due to coupling between an antenna and a built-in antenna.

[0002]

2. Description of the Related Art Conventionally, as this type of antenna device,
There is one described in Utility Model Registration No. 3014378.

FIG. 11 is a configuration diagram of a portable mobile radio device equipped with a conventional antenna device.

The antenna device shown in FIG. 11 includes an antenna base 1101, a monopole antenna 1102, an insulator 1103, a helical antenna 1104, a resin mold 1105, an antenna holder 1106, a power supply spring 1
107, a built-in loop antenna 1108, and a balanced-unbalanced conversion element 1109, and are configured as described later.

That is, a spiral antenna 1104 is fixed to the tip of a rod-shaped monopole antenna 1102 having an electric length of an arbitrary length fixed to an antenna base 1101 via a cylindrical insulator 1103. The antenna 1104 is covered and sealed with a cylindrical case-shaped resin mold 1105.
Is held in the housing 1110 of the mobile radio apparatus by a metal antenna holder 1106 so as to sandwich the outer case 1111 from the inside and the outside, and a part of the antenna holder 1106 comes into contact with the power supply spring 1107 so that the radio circuit 111
2 is connected.

That is, power is supplied to the monopole antenna 1102 from the wireless circuit 1112 via the power supply spring 1107 and the antenna holder 1106.

On the other hand, the built-in loop antenna 1108 has
Power supply from the wireless circuit 1112, which is an unbalanced circuit, is balanced.
Power is supplied after being converted into balanced power by the unbalanced conversion element 1109, and diversity is performed with the monopole antenna 1102, whereby stable communication is performed.

[0008]

However, in the conventional apparatus, the built-in loop antenna 1108 is installed on the housing 1110 at a distance of about 3 to 4 mm from the monopole antenna 1102, A cylindrical metal having a diameter of about 7 mm is used for an antenna holder 1106 for holding the antenna in the housing 1110.

Therefore, the distance between the outer peripheral surface of the antenna holder 1106 and the built-in loop antenna 1108 becomes extremely short,
As a result, there is a problem that strong coupling (large coupling amount) occurs between the antennas in the reception band between the monopole antenna 1102 and the built-in loop antenna 1108, and the antenna gains of both antennas are deteriorated.

[0010] More specifically, as shown in the pass loss (coupling amount) characteristics between the monopole antenna 1102 and the built-in loop antenna 1108 in FIG. The passage loss is larger by about 3 to 5 dB than the transmission band indicated by the markers 1 and 2.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an antenna device capable of realizing a high gain by reducing the influence of coupling between antennas in a diversity configuration.

[0012]

An antenna device according to the present invention comprises a monopole antenna, a built-in antenna incorporated in a radio, and the monopole antenna fixed to the radio in a conductive state with the monopole antenna. An antenna holder formed in such a size that the coupling between the monopole antenna and the built-in antenna is sometimes minimized, and a feeding unit for feeding power to the monopole antenna via the antenna holder. .

According to this structure, the distance between the outer peripheral surface of the antenna holder and the built-in antenna is made as long as possible, so that the coupling amount between the antennas in the reception band between the monopole antenna and the built-in antenna is reduced. The antenna gain can be improved accordingly.

An antenna device according to the present invention includes a monopole antenna, a built-in antenna built in a radio, and an antenna holder using an insulator material for fixing the monopole antenna to the radio in a conductive state with the monopole antenna. And a power supply unit for supplying power to the monopole antenna.

According to this configuration, since the insulator material is used for the antenna holder, the distance between the monopole antenna and the built-in antenna is increased, and the distance between the monopole antenna and the built-in antenna in the reception band is proportionally increased. The amount of coupling between the antennas is reduced, and the antenna gain of both antennas can be improved accordingly.

An antenna device according to the present invention includes a built-in antenna built in a radio, a monopole antenna, a helical antenna fixed to an end of the monopole antenna via an insulator, the monopole antenna, and the monopole antenna. A spiral antenna is held in the wireless device so as to be freely movable while being housed / extended inside / outside the wireless device. When the spiral antenna is extended, the coupling amount between the monopole antenna and the built-in antenna is reduced as much as possible. An antenna holder formed at a size such that the amount of coupling between the spiral antenna and the built-in antenna is as small as possible, and is connected to the monopole antenna via the antenna holder at the time of extension to supply power, and at the time of storage, The spiral is formed by capacitive coupling of a capacitive gap formed between the spiral antenna and the antenna holder with which the spiral antenna is in contact. And power supply means for supplying power to the antenna employs a configuration having a, a gap holding means is interposed between said feeding means and said antenna holder an insulator to form the capacitor gap.

According to this configuration, the distance between the antenna holder and the built-in antenna is configured to be as long as possible. Therefore, when the antenna is extended, the coupling amount between the antennas in the reception band between the monopole antenna and the built-in antenna is reduced. It gets smaller (smaller than before),
The antenna gains of both antennas can be improved, and when the whip antenna is housed, the amount of coupling between the spiral antenna and the built-in antenna in the reception band is reduced accordingly, and the antenna gains of both are improved accordingly. be able to.

An antenna device according to the present invention includes a built-in antenna built in a radio, a monopole antenna, a helical antenna fixed to an end of the monopole antenna via an insulator, the monopole antenna and the monopole antenna. An antenna holder using an insulator material for holding the helical antenna in the radio so as to be freely movable while being housed / extended inside / outside the radio, and connected to the monopole antenna at the time of expansion to supply power. Power feeding means for feeding power to the helical antenna by capacitive coupling by the antenna holder interposed between the helical antenna during the storage and the helical antenna.

According to this configuration, since the insulator material is used for the antenna holder, the distance between the monopole antenna or the helical antenna and the built-in antenna becomes longer. The amount of coupling between antennas in the reception band with the built-in antenna is reduced, and the antenna gain of both antennas can be improved accordingly.

An antenna device according to the present invention includes a built-in antenna built in a radio, a monopole antenna, a helical antenna fixed to an end of the monopole antenna via an insulator, the monopole antenna and the monopole antenna. A spiral antenna is held in the wireless device so as to be freely movable while being housed / extended inside / outside the wireless device. When the spiral antenna is extended, the coupling amount between the monopole antenna and the built-in antenna is reduced as much as possible. Sometimes, the antenna holder is formed in a size such that the amount of coupling between the spiral antenna and the built-in antenna is as small as possible, and between the antenna holder with which the spiral antenna or the monopole antenna abuts during the storage or extension. Power is supplied to the spiral antenna or the monopole antenna by capacitive coupling due to the formed capacitive gap. Taking a conductor means, the arrangement having a the distance holding means interposed between said feeding means and said antenna holder an insulator to form the capacitor gap.

According to this configuration, since the interval between the antenna holder and the built-in antenna is made as long as possible, the reception band between the monopole antenna or the helical antenna and the built-in antenna when the antenna is extended or stored is increased. , The amount of coupling between the antennas becomes smaller by that amount, and the antenna gain of both antennas can be improved accordingly.

An antenna device according to the present invention includes a built-in antenna built in a radio device, a monopole antenna, a helical antenna fixed to an end of the monopole antenna via an insulator, the monopole antenna and the monopole antenna. An antenna holder made of an insulating material for holding a spiral antenna in the wireless device so as to be freely movable while being housed / extended inside and outside the wireless device; and the spiral antenna or the monopole at the time of storing or extending. Power feeding means for feeding power to the spiral antenna or the monopole antenna by capacitive coupling by the antenna holder interposed between the antenna and the antenna.

According to this configuration, since the insulator material is used for the antenna holder, the distance between the monopole antenna or the helical antenna and the built-in antenna becomes longer. In addition, the amount of coupling between the antennas in the reception band with the built-in antenna is reduced, and the antenna gain of both antennas can be improved accordingly.

[0024] The antenna device of the present invention employs a configuration in which a resin is used as an insulator material in the above configuration.

According to this configuration, since the monopole antenna or the spiral antenna and the built-in antenna are insulated by the resin, the distance between the monopole antenna or the spiral antenna and the built-in antenna becomes longer, and the distance between the monopole antenna or the spiral antenna and the built-in antenna is increased. As a result, the amount of coupling between the monopole antenna or the helical antenna and the built-in antenna in the receiving band is reduced, and the antenna gain of both antennas can be improved accordingly.

The mobile station apparatus of the present invention employs a configuration including an antenna device having the same configuration as any of the above.

According to this configuration, in the mobile station device,
The same operation and effect as any of the above can be obtained.

The mobile communication system of the present invention employs a configuration including the mobile station apparatus having the above configuration.

According to this configuration, in the mobile communication system, the same operation and effect as those of the mobile station apparatus having the above configuration can be obtained.

[0030]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(Embodiment 1) FIG. 1 is a configuration diagram of a portable mobile radio apparatus equipped with an antenna apparatus according to Embodiment 1 of the present invention.

The antenna device according to the first embodiment shown in FIG. 1 has an antenna base 101 and a monopole antenna 10.
2, an antenna holder 103, a feeding spring 104, a built-in loop antenna 105, and a balance-unbalance conversion element 10
6 and are configured as described later.

That is, a rod-shaped monopole antenna 102 having an electric length of an arbitrary length fixed to an antenna base 101 is attached to a housing 107 of a mobile radio apparatus by a metal cylindrical antenna holder 103 and an outer case 108. Is held between the inside and the outside, and the antenna holder 10
3 is in contact with the power supply spring 104 and the wireless circuit 1
09.

That is, the monopole antenna 102 has
Power is supplied from the wireless circuit 109 via the power supply spring 104 and the antenna holder 103.

On the other hand, the built-in loop antenna 105 is fed with power from a radio circuit 109 which is an unbalanced circuit, after being converted into balanced power by a balanced-unbalanced conversion element 106, and fed to the monopole antenna 102. Diversity reception is performed, and thereby stable communication is performed.

The feature of the antenna device of the first embodiment having the above-described structure and operation is that the diameter of the antenna holder 103 made of a cylindrical metal member is made smaller than that of the conventional antenna holder of about 7 mm. Is made as long as possible between the outer peripheral surface and the built-in loop antenna 105.

As described above, according to the antenna device of the first embodiment, the interval between the outer peripheral surface of the antenna holder 103 and the built-in loop antenna 105 is made as long as possible. The amount of coupling between the antennas in the reception band with the loop antenna 105 becomes smaller (becomes smaller than in the related art), and the antenna gains of both can be improved accordingly.

The state of the improvement is specifically described in the monopole antenna 102 and the built-in loop antenna 105 shown in FIG.
As shown in the pass loss (coupling amount) characteristics between the two, the reception band at the time of diversity indicated by the markers 3 and 4 is about 2 to 3 dB lower than the transmission band indicated by the markers 1 and 2. The difference is an improvement over the conventional one shown in FIG.
It is improved by about dB.

(Embodiment 2) FIG. 2 is a configuration diagram of a portable mobile radio apparatus equipped with an antenna apparatus according to Embodiment 2 of the present invention. However, in the second embodiment shown in FIG. 2, portions corresponding to the respective portions of the first embodiment in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

The antenna device according to the second embodiment shown in FIG. 2 is different from the antenna device according to the first embodiment shown in FIG.
Using an antenna holder (resin holder) 201 made of an insulating material such as a BS resin, the antenna base 101 to which the monopole antenna 102 is fixed is held in the housing 107. The direct conduction connection is provided.

According to such a configuration, the resin holder 20
1 is an insulator, so that the monopole antenna 102 is not coupled to the built-in loop antenna 105 via the antenna holder 103 as in the first embodiment, but is integrated with the antenna base 101 to which the monopole antenna 102 is fixed. The loop antenna 105 is coupled.

That is, the distance between the antenna base 101 and the built-in loop antenna 105 is longer than the distance between the antenna holder 103 and the built-in loop antenna 105 in the first embodiment.
The distance between the antenna and the built-in loop antenna 105 also increases.

As described above, according to the antenna device of the second embodiment, since the resin holder 201 made of an insulating material is used for the antenna holder, the distance between the monopole antenna 102 and the built-in loop antenna 105 becomes longer. The amount of coupling between the antennas in the reception band between the monopole antenna 102 and the built-in loop antenna 105 decreases in proportion to, so that the antenna gain of both can be improved accordingly.

(Embodiment 3) FIG. 3 is a configuration diagram of a portable mobile radio apparatus equipped with an antenna apparatus according to Embodiment 3 of the present invention. However, in the third embodiment shown in FIG. 3, portions corresponding to the respective portions of the first embodiment in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

The antenna device according to the third embodiment shown in FIG. 3 is different from the antenna device according to the first embodiment shown in FIG. 1 in that a monopole antenna 102 has a distal end provided with a cylindrical insulator 301 interposed therebetween. To fix the spiral antenna 302,
The spiral antenna 302 is covered and sealed with a resin mold 303 of a cylindrical case type.
And the spiral antenna 302 is housed in the housing 107 via the antenna holder 103 so as to be movable up and down, and a gap is maintained between the feeding spring 104 and the antenna holder 103 by an insulator material. The jig 304 is interposed.

As shown in FIG. 4, when the whip antenna is stored and the base of the spiral antenna 302 is placed in contact with the antenna holder 103 as shown in FIG. This is for forming a minute capacitance gap 401 between the spiral antenna 302 and the spiral antenna 302.

In such a configuration, when the whip antenna shown in FIG. 3 is extended, a signal from the radio circuit 109 is supplied to the antenna base 101 via the power supply spring 104, thereby supplying power to the monopole antenna 102. Will be

On the other hand, when the whip antenna is housed as shown in FIG. 4, a signal from the radio circuit 109 forms a capacitance between the feeding spring 104 and the helical antenna 302 by the minute capacitance gap 401, and the helical antenna is formed by this capacitive coupling. Power is supplied to 302. That is, the spiral antenna 302
, The spiral antenna 302 operates as an antenna.

The feature of the antenna device according to the third embodiment having the above-described structure and operation is that the whip antenna is extended by making the diameter of the antenna holder 103 made of a cylindrical metal member smaller than the conventional diameter of about 7 mm. Also, the distance between the outer peripheral surface of the antenna holder 103 and the built-in loop antenna 105 is made as long as possible during storage.

As described above, according to the antenna apparatus of the third embodiment, the interval between the outer peripheral surface of the antenna holder 103 and the built-in loop antenna 105 is made as long as possible. The amount of coupling between the antennas in the reception band between the pole antenna 102 and the built-in loop antenna 105 is reduced accordingly (smaller than in the related art), so that both antenna gains can be improved, and When the antenna is housed, the spiral antenna 302 and the built-in loop antenna 105
The amount of coupling between the antennas in the reception band between the antennas is reduced accordingly, and the antenna gain of both antennas can be improved accordingly.

(Embodiment 4) FIG. 5 is a configuration diagram of a portable mobile radio apparatus equipped with an antenna apparatus according to Embodiment 4 of the present invention. However, in the fourth embodiment shown in FIG. 5, portions corresponding to the respective portions of the third embodiment in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.

The antenna device according to the fourth embodiment shown in FIG. 5 is different from the antenna device according to the third embodiment shown in FIG.
An antenna holder (resin holder) 201 made of an insulating material such as BS resin is used, and the gap holding jig 304 is eliminated by causing the resin holder 201 to function as a gap holding jig 304 (see FIGS. 3 and 4). When the whip antenna is extended, the antenna base 101 is
Is directly connected to the terminal.

When the whip antenna shown in FIG. 5 is extended,
A signal from the wireless circuit 109 is supplied to the antenna base 101 via the power supply spring 104, whereby power is supplied to the monopole antenna 102.

On the other hand, when the whip antenna is housed as shown in FIG.
The capacitance is generated by the minute capacitance gap 401 formed by the above, and power is supplied to the spiral antenna 302 by the capacitive coupling. That is, the spiral antenna 302 operates as an antenna by loading the capacitance in series on the spiral antenna 302.

According to such a configuration, the resin holder 20
Since 1 is an insulator, when the whip antenna is extended,
As in the third embodiment, the monopole antenna 102 is connected to the built-in loop antenna 105 via the antenna holder 103.
Antenna base 101 to which monopole antenna 102 is fixed and built-in loop antenna 105
Are combined.

That is, the distance between the antenna base 101 and the built-in loop antenna 105 is longer than the distance between the antenna holder 103 and the built-in loop antenna 105 in the third embodiment.
The distance between the antenna and the built-in loop antenna 105 also increases.

When the whip antenna is stored, the spiral antenna 302 is not coupled to the built-in loop antenna 105 via the antenna holder 103 as in the third embodiment, but the base of the spiral antenna 302 and the built-in loop antenna 105 are connected. It will be in the state of joining.

That is, the interval between the base of the spiral antenna 302 and the built-in loop antenna 105 is longer than the interval between the antenna holder 103 and the built-in loop antenna 105 in the third embodiment.
The distance between the antenna and the built-in loop antenna 105 also increases.

As described above, according to the antenna device of the fourth embodiment, since the resin holder 201 made of an insulating material is used for the antenna holder, the distance between the monopole antenna 102 or the spiral antenna 302 and the built-in loop antenna 105 is increased. In proportion to this, the amount of coupling between the antennas in the reception band between the monopole antenna 102 or the spiral antenna 302 and the built-in loop antenna 105 is reduced, and the antenna gain of both is improved accordingly. it can.

(Embodiment 5) FIG. 7 is a configuration diagram of a portable mobile radio apparatus equipped with an antenna apparatus according to Embodiment 5 of the present invention. However, in the fifth embodiment shown in FIG. 7, parts corresponding to the respective parts of the third embodiment in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.

The antenna device according to the fifth embodiment shown in FIG. 7 is different from the antenna device according to the third embodiment shown in FIG. 3 in that the gap holding jig 304 in FIG. While a small-capacity gap 401 is provided between the feeding spring 104 and the spiral antenna 302 via the antenna holder 103, the gap holding jig 701 is provided in the fifth embodiment of FIG. ,
The reason is that a minute capacitance gap 703 is provided between the feeding spring 702 and the monopole antenna 102 or the spiral antenna 302 via the antenna holder 103 when the whip antenna is extended or stored as shown in FIG.

That is, the feeding spring 702 is formed in such a shape that it is not directly connected to the monopole antenna 102 and the helical antenna 302 both when the whip antenna is extended and when it is stored, and the gap is maintained. As shown in FIG. 7, when the whip antenna is extended, the jig 304 holds the antenna holder 103 and the antenna base 101 together.
The antenna holder 103 and the antenna base 101 and the power supply spring 7 are connected so as not to be directly connected to the power supply spring 702.
02.

According to such a configuration, when the whip antenna is extended as shown in FIG.
Between the feeding spring 702 and the monopole antenna 102,
A capacitance is formed by the minute capacitance gap 703, and power is supplied to the monopole antenna 102 by the capacitive coupling. That is, the monopole antenna 102 operates as an antenna by loading the capacitance in series with the monopole antenna 102.

Also, when the whip antenna shown in FIG. 8 is housed, a signal from the radio circuit 109 forms a capacitance between the feeding spring 702 and the helical antenna 302 by the minute capacitance gap 703, and the helical antenna is formed by this capacitive coupling. 3
02 is supplied with power. That is, the spiral antenna 302 is loaded with the capacitance in series, so that the spiral antenna 3
02 operates as an antenna.

In the antenna device according to the fifth embodiment having such a configuration and operation, similarly to the third embodiment, the diameter of the antenna holder 103 made of a cylindrical metal member is smaller than the conventional diameter of about 7 mm. Accordingly, when the whip antenna is extended and stored, the interval between the outer peripheral surface of the antenna holder 103 and the built-in loop antenna 105 is made as long as possible.

As described above, according to the antenna device of the fifth embodiment, the interval between the outer peripheral surface of the antenna holder 103 and the built-in loop antenna 105 is configured to be as long as possible. At times, the amount of coupling between the antenna of the monopole antenna 102 or the spiral antenna 302 and the built-in loop antenna 105 in the reception band is reduced by that amount, and the antenna gain of both can be improved accordingly.

(Embodiment 6) FIG. 9 is a configuration diagram of a portable mobile radio apparatus equipped with an antenna apparatus according to Embodiment 6 of the present invention. However, in the sixth embodiment shown in FIG. 9, portions corresponding to the respective portions of the fifth embodiment in FIG. 7 are denoted by the same reference numerals, and description thereof will be omitted.

The antenna device according to the sixth embodiment shown in FIG. 9 is different from the antenna device according to the fifth embodiment shown in FIG.
An antenna holder (resin holder) 201 made of an insulating material such as BS resin is used, and the gap holding jig 701 is eliminated by causing the resin holder 201 to function as a gap holding jig 701 (see FIGS. 7 and 8). is there.

That is, the resin holder 201 prevents the antenna base 101 from being directly conductively connected to the feeding spring 702 when the whip antenna is extended as shown in FIG. Play a role.

According to such a configuration, when the whip antenna is extended, the signal from the radio circuit 109 is supplied to the power supply spring 7.
02 and the monopole antenna 102, a capacitance is formed by the minute capacitance gap 901, and power is supplied to the monopole antenna 102 by this capacitive coupling. That is,
The monopole antenna 102 operates as an antenna by loading the capacitance in series with the monopole antenna 102.

Further, when the whip antenna is housed, a signal from the radio circuit 109 forms a capacitance between the feeding spring 702 and the spiral antenna 302 by a minute capacitance gap 901, and power is supplied to the spiral antenna 302 by this capacitive coupling. Done. That is, the spiral antenna 302 operates as an antenna by loading the capacitance in series on the spiral antenna 302.

As described above, according to the antenna device of the sixth embodiment, since resin holder 201 made of an insulating material is used for the antenna holder, the distance between monopole antenna 102 or spiral antenna 302 and built-in loop antenna 105 is increased. In proportion to this, the amount of coupling between the antennas in the reception band between the monopole antenna 102 or the spiral antenna 302 and the built-in loop antenna 105 is reduced, and the antenna gain of both is improved accordingly. it can.

[0073]

As described above, according to the present invention,
High gain can be realized by reducing the influence of the coupling between antennas in the diversity configuration.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a portable mobile wireless device equipped with an antenna device according to a first embodiment of the present invention;

FIG. 2 is a configuration diagram of a portable mobile wireless device equipped with an antenna device according to a second embodiment of the present invention;

FIG. 3 is a configuration diagram of a portable mobile wireless device equipped with an antenna device according to a third embodiment of the present invention;

FIG. 4 is a configuration diagram when a whip antenna is stored in the antenna device according to the third embodiment.

FIG. 5 is a configuration diagram of a portable mobile radio device equipped with an antenna device according to Embodiment 4 of the present invention.

FIG. 6 is a configuration diagram when the whip antenna is stored in the antenna device according to the fourth embodiment.

FIG. 7 is a configuration diagram of a portable mobile wireless device equipped with an antenna device according to a fifth embodiment of the present invention.

FIG. 8 is a configuration diagram when a whip antenna is stored in the antenna device according to the fifth embodiment.

FIG. 9 is a configuration diagram of a portable mobile wireless device equipped with an antenna device according to a sixth embodiment of the present invention.

FIG. 10 is a configuration diagram when a whip antenna is stored in the antenna device according to the sixth embodiment.

FIG. 11 is a configuration diagram of a portable mobile wireless device equipped with a conventional antenna device.

FIG. 12 is a characteristic diagram of a passing loss (coupling amount) between a monopole antenna and a built-in loop antenna in the antenna device according to the second embodiment;

FIG. 13 shows a passing loss (coupling amount) between a monopole antenna and a built-in loop antenna in a conventional antenna device.
Characteristic diagram

[Explanation of symbols]

 Reference Signs List 101 antenna base 102 monopole antenna 103 antenna holder 104, 702 feeding spring 105 built-in loop antenna 201 resin holder 302 spiral antenna 304, 701 gap holding jig 401, 601, 703, 901 small capacity gap

Claims (9)

[Claims] 1. A monopole antenna, a built-in antenna built into a radio, and the monopole antenna fixed to the radio in a conductive state with the monopole antenna. An antenna device comprising: an antenna holder formed to have a size that minimizes a coupling amount; and a feeding unit that feeds power to the monopole antenna via the antenna holder. 2. A monopole antenna, a built-in antenna built in the radio, an antenna holder using an insulator material for fixing the monopole antenna to the radio in a conductive state with the monopole antenna, and the monopole antenna And a power supply unit for supplying power to the antenna device. 3. A built-in antenna built in a wireless device, a monopole antenna, a helical antenna fixed to an end of the monopole antenna via an insulator, and the monopole antenna and the helical antenna, The monopole antenna and the built-in antenna are held by the radio so as to be freely movable while being housed / extended inside / outside the radio, and the amount of coupling between the monopole antenna and the built-in antenna during the expansion is minimized. An antenna holder formed in a size that minimizes the amount of coupling with the built-in antenna,
At the time of the extension, the antenna is connected to the monopole antenna via the antenna holder to supply power, and at the time of the storage, the spiral antenna is formed by capacitive coupling by a capacitive gap formed between the antenna holder and the antenna holder. An antenna device comprising: a power supply unit for supplying power to a power supply; 4. A built-in antenna built in a radio device, a monopole antenna, a helical antenna fixed to an end of the monopole antenna via an insulator, and the monopole antenna and the helical antenna, An antenna holder using an insulator material held by the radio so as to be freely movable while being stored / extended inside / outside the radio, and connected to the monopole antenna during the extension to supply power, and An antenna device comprising: a power supply unit configured to supply power to the spiral antenna by capacitive coupling of the antenna holder interposed between the spiral antenna and the spiral antenna. 5. A built-in antenna built in a wireless device, a monopole antenna, a helical antenna fixed to an end of the monopole antenna via an insulator, and the monopole antenna and the helical antenna, The monopole antenna and the built-in antenna are held by the radio so as to be freely movable while being housed / extended inside / outside the radio, and the amount of coupling between the monopole antenna and the built-in antenna during the expansion is minimized. An antenna holder formed in a size that minimizes the amount of coupling with the built-in antenna,
Feeding means for feeding power to the spiral antenna or the monopole antenna by capacitive coupling due to a capacitive gap formed between the spiral antenna or the antenna holder with which the monopole antenna abuts during the storage or extension; Spacing means for interposing an insulator forming the capacitance gap between the antenna holder and the power supply means,
An antenna device comprising: 6. A built-in antenna incorporated in a wireless device, a monopole antenna, a helical antenna fixed to an end of the monopole antenna via an insulator, and the monopole antenna and the helical antenna, An antenna holder using an insulator material held by the wireless device so as to be freely movable while being stored / extended inside and outside the wireless device, and between the spiral antenna or the monopole antenna at the time of storing or extending. An antenna device comprising: a power supply unit configured to supply power to the spiral antenna or the monopole antenna by capacitive coupling of the interposed antenna holder. 7. The antenna device according to claim 2, wherein a resin is used as the insulator material. 8. A mobile station device comprising the antenna device according to any one of claims 1 to 7. 9. A mobile communication system comprising the mobile station device according to claim 8.