JP2003249810A - Multi-frequency antenna - Google Patents

Abstract

(57) [Problem] To provide a multi-frequency antenna that can be built in a wireless device housing and resonates in a plurality of frequency bands. A conductive antenna pattern is divided into two on a mounting substrate constituting a portable wireless device.
To form One ends of the conductor antenna patterns 1a and 1b are connected to the chip component mounting lands 2a and 2b, and the reactance component 4 is mounted on the chip component mounting lands 2a and 2b. With this configuration, it is possible to realize a multi-frequency antenna that is built in the portable wireless device and resonates in a plurality of frequency bands, and it is possible to integrally mold the mounting substrate of the portable wireless device and the antenna.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna for a portable wireless device, and more particularly to a multi-frequency antenna for a portable wireless device built in a radio housing.

[0002]

2. Description of the Related Art Conventionally, an antenna as shown in FIG. 15 is known as an antenna used in this type of portable radio device. As shown in FIG. 15, this portable radio device is configured such that a λ / 4 monopole antenna 60 is mounted on a radio base plate 50.

[0003]

However, in such a conventional portable radio device antenna, since the antenna is provided outside the housing, there is a risk of damage. Also,
There is a problem that it is difficult to resonate in two or more frequency bands having different frequencies with one antenna.

The present invention has been made in order to solve such a conventional problem, and provides a multi-frequency antenna which can be built in a radio casing and resonates in a plurality of frequency bands.

[0005]

A multi-frequency antenna according to the present invention comprises a conductor antenna pattern formed on a mounting substrate which is divided into a plurality of parts to form a portable radio device, and a conductor antenna pattern which is divided into a plurality of parts. And a reactance component connected between them. With this configuration, it is possible to realize a multi-frequency antenna that is built in the portable wireless device and resonates in a plurality of frequency bands.
The mounting board of the portable wireless device and the antenna can be integrally molded.

The multi-frequency antenna according to the present invention has a structure in which the conductor antenna pattern is polygonal. With this configuration, it is built into the portable wireless device,
A multi-frequency antenna that resonates in a plurality of frequency bands can be realized, the mounting substrate of the portable wireless device and the antenna can be integrally formed, and the bandwidth of a desired frequency band can be expanded.

The multi-frequency antenna according to the present invention has a structure in which the conductor antenna pattern is formed in a meandering shape. With this configuration, it is possible to realize a multi-frequency antenna that is built in the portable wireless device and resonates in a plurality of frequency bands, the mounting substrate of the portable wireless device and the antenna can be integrally molded, and the conductor antenna can be formed in a small space. The electric length of the pattern can be earned.

The multi-frequency antenna according to the present invention has a structure in which the conductor antenna pattern is formed in an inverted L shape. With this configuration, it is possible to realize a multi-frequency antenna that is built in the portable wireless device and resonates in multiple frequency bands, the mounting substrate of the portable wireless device and the antenna can be integrally formed, and the antenna element has a low profile. Will be realized.

The multi-frequency antenna according to the present invention has a structure in which the conductor antenna pattern is formed in an inverted F shape. With this configuration, it is possible to realize a multi-frequency antenna which is built in the portable wireless device and resonates in a plurality of frequency bands, the mounting substrate of the portable wireless device and the antenna can be integrally molded, and the mounting substrate GND is affected. It is possible to realize a difficult multi-frequency antenna.

The multi-frequency antenna according to the present invention has a structure in which the conductor antenna pattern is formed in a helical shape. With this configuration, it is possible to realize a multi-frequency antenna that is built in the portable wireless device and resonates in a plurality of frequency bands, the mounting substrate of the portable wireless device and the antenna can be integrally formed, and impedance matching can be easily achieved. be able to.

The multi-frequency antenna according to the present invention has a structure in which the conductor antenna pattern is a dipole conductor antenna pattern. With this configuration,
It is possible to realize a multi-frequency antenna that is built in the portable radio and resonates in multiple frequency bands. The mounting board of the portable radio and the antenna can be integrally molded, and the radiation pattern is omnidirectional and has a high gain. An antenna can be realized.

In the multi-frequency antenna according to the present invention, the conductor antenna pattern is divided and arranged on both surface layers and inner layers of the mounting board, and the mounting board is provided with conductor through holes for conducting the divided conductor antenna patterns. have. With this configuration, it is possible to realize a multi-frequency antenna that is built in the portable wireless device and resonates in a plurality of frequency bands, the mounting substrate of the portable wireless device and the antenna can be integrally formed, and a pattern is formed on each surface of the substrate. By being configured, the component mounting area of the board can be increased.

The multi-frequency antenna according to the present invention has a structure in which the reactance component is formed by a conductor pattern on the same surface of the mounting board. With this configuration, the number of mounting components mounted on the mounting board can be reduced.

The multi-frequency antenna according to the present invention has a structure in which a parasitic element having an impedance matching function is provided near the conductor antenna pattern. With this configuration, impedance matching can be easily achieved without using a lumped constant.

The multi-frequency antenna according to the present invention has a structure in which the parasitic element is formed on the mounting board by a conductor pattern. With this configuration, impedance matching can be easily achieved without using a lumped constant, and the number of components used in the portable wireless device can be reduced.

The multi-frequency antenna according to the present invention has a structure in which a parasitic element having a function as a director or a reflector is provided near the conductor antenna pattern. With this configuration, it is possible to control the directivity of the antenna radiation and strongly radiate the radiation in an arbitrary direction.

The multi-frequency antenna according to the present invention has a structure in which the parasitic element is formed on the mounting board by a conductor pattern. With this configuration, the directivity of the antenna radiation can be manipulated to strongly radiate the radiation in an arbitrary direction, and the number of components mounted on the portable wireless device can be reduced.

The portable radio apparatus according to the present invention is defined in claim 1.
The multi-frequency antenna according to any one of 1 to 13 is mounted. With this configuration, an antenna that can resonate in a plurality of frequency bands can be built in the housing of the mobile wireless device.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The first to thirteenth embodiments of the present invention will be described in detail below with reference to the accompanying drawings. (First Embodiment) First, with reference to FIG. 1, a multi-frequency antenna for a portable radio device according to a first embodiment of the present invention will be described. As shown in FIG. 1, the multi-frequency antenna according to the present embodiment has conductor antenna patterns 1a and 1b divided into two, which are formed on a mounting substrate 100 that constitutes a portable wireless device. Conductor antenna pattern 1
One ends of a and 1b are connected to the chip component mounting lands 2a and 2b, respectively. Conductor antenna pattern 1
A and 1b are fed by the antenna feeding portion 3, and the reactance component 4 such as a chip inductor or a chip capacitor is mounted on the chip component mounting land. With the configuration as described above, the multi-frequency antenna according to the present embodiment is built in the portable wireless device and has a plurality of frequency bands or two or more frequency bands as shown in the frequency-VSWR characteristic curve of FIG. A multi-frequency antenna that resonates can be realized, and the mounting board of the portable wireless device and the antenna can be integrally molded.

(Second Embodiment) Next, with reference to FIG. 2, a multi-frequency antenna for a portable radio device according to a second embodiment of the present invention will be described. As shown in FIG.
In the multi-frequency antenna according to the present embodiment, two-divided polygonal conductor antenna patterns 5a and 5b are formed on a mounting substrate 100 that constitutes a portable wireless device. One ends of the conductor antenna patterns 5a and 5b are connected to the chip component mounting lands 2a and 2b, respectively. The conductor antenna patterns 5a and 5b are fed by the antenna feeding portion 3 and are mounted on the chip component mounting land 2a.
Reactance components 4 such as a chip inductor and a chip capacitor are mounted on and 2b. With the configuration as described above, the multi-frequency antenna according to the present embodiment is built in the portable wireless device and can resonate in two or more frequency bands, as in the first embodiment. The mounting board of the portable wireless device and the antenna can be integrally molded, and the bandwidth of a desired frequency band can be further expanded.

(Third Embodiment) Next, with reference to FIG. 3, a multi-frequency antenna for a portable radio device according to a third embodiment of the present invention will be described. As shown in FIG.
In the multi-frequency antenna according to the present embodiment, meander-shaped conductor antenna patterns 6a and 6b that are divided into two are formed on mounting board 100 that constitutes a portable wireless device.
One ends of the conductor antenna patterns 6a and 6b are connected to the chip component mounting lands 2a and 2b, respectively. The conductor antenna patterns 6a and 6b are fed by the antenna feeding portion 3 and are mounted on the chip component mounting land 2a.
Reactance components 4 such as a chip inductor and a chip capacitor are mounted on and 2b. With the configuration as described above, the multi-frequency antenna according to the present embodiment is built in the portable wireless device and can resonate in two or more frequency bands, as in the first embodiment. The mounting substrate of the portable wireless device and the antenna can be integrally molded, and further, the electrical length of the conductor antenna patterns 6a and 6b can be obtained in a small space.

(Fourth Embodiment) Next, with reference to FIG. 4, a multi-frequency antenna for a portable radio device according to a fourth embodiment of the present invention will be described. As shown in FIG.
In the multi-frequency antenna according to the present embodiment, two divided inverted L-shaped conductor antenna patterns 7a and 7b are formed on mounting board 100 that constitutes a portable wireless device. One ends of the conductor antenna patterns 7a and 7b are connected to the chip component mounting lands 2a and 2b, respectively. The conductor antenna patterns 7a and 7b are fed by the antenna feeding portion 3 and are mounted on the chip component mounting land 2a.
Reactance components 4 such as a chip inductor and a chip capacitor are mounted on and 2b.

By configuring as described above,
Like the first embodiment, the multi-frequency antenna according to the present embodiment is built in the portable wireless device and can resonate in two or more frequency bands, so that the mounting substrate and the antenna of the portable wireless device are separated from each other. In addition to being integrally moldable, it is possible to further reduce the posture of the antenna element. In the present embodiment, linear antenna patterns 7a and 7b are used.
Although the example has been described, the same effect can be obtained by using a plate-shaped conductor antenna pattern.

(Fifth Embodiment) Next, with reference to FIG. 5, a multi-frequency antenna for a portable radio device according to a fifth embodiment of the present invention will be described. As shown in FIG.
In the multi-frequency antenna according to the present embodiment, two divided inverted F-shaped conductor antenna patterns 8a and 8b are formed on mounting board 100 which constitutes a portable wireless device. The conductor antenna pattern 8a is connected to the antenna feeding part 3, the mounting substrate GND101, and the chip component mounting land 2a. Further, one end of the conductor antenna pattern 8b is connected to the chip component mounting land 2b. A reactance component 4 such as a chip inductor or a chip capacitor is mounted on the chip component mounting lands 2a and 2b.

By configuring as described above,
Like the first embodiment, the multi-frequency antenna according to the present embodiment is built in the portable wireless device and can resonate in two or more frequency bands, so that the mounting substrate and the antenna of the portable wireless device are separated from each other. In addition to being integrally molded, it is possible to realize an antenna that is not easily affected by the mounting substrate GND. Although the example of the linear conductor antenna patterns 8a and 8b has been described in the present embodiment, the same effect can be obtained by using a plate-shaped conductor antenna pattern.

(Sixth Embodiment) Next, with reference to FIG. 6, a multi-frequency antenna for a portable radio device according to a sixth embodiment of the present invention will be described. As shown in FIG.
In the multi-frequency antenna according to the present embodiment, conductive conductor antenna patterns 9a and 9b that are divided into two are formed on mounting board 100 that constitutes a portable wireless device.
One end of each of the conductor antenna patterns 9a and 9b is connected to the chip component mounting lands 2a and 2b. The conductor antenna patterns 9a and 9b are used for the antenna feeding unit 3
Is fed by the chip component mounting lands 2a and 2
A reactance component 4 such as a chip inductor or a chip capacitor is mounted on b. With the configuration as described above, the multi-frequency antenna according to the present embodiment is built in the portable wireless device and can resonate in two or more frequency bands, as in the first embodiment. The mounting substrate of the portable wireless device and the antenna can be integrally molded, and further, impedance matching can be easily achieved.

(Seventh Embodiment) Next, with reference to FIG. 7, a multi-frequency antenna for a portable radio device according to a seventh embodiment of the present invention will be described. As shown in FIG.
In the multi-frequency antenna according to the present embodiment, dipole conductor antenna patterns 10a and 10b, which are divided into two, are formed on a mounting substrate 100 that constitutes a portable wireless device. Dipole conductor antenna patterns 10a and 10
Each one end of b has chip component mounting lands 2a and 2b.
Connected to. Dipole conductor antenna pattern 10a
And 10b are fed by the antenna feeding unit 3, and the reactance component 4 such as a chip inductor or a chip capacitor is mounted on the chip component mounting lands 2a and 2b.

By configuring as described above,
Like the first embodiment, the multi-frequency antenna according to the present embodiment is built in the portable wireless device and can resonate in two or more frequency bands, so that the mounting substrate and the antenna of the portable wireless device are separated from each other. In addition to being integrally moldable, an antenna with a non-directional radiation pattern and high gain can be realized. Although the example of the linear dipole conductor antenna patterns 10a and 10b has been described in the present embodiment, the same effect can be obtained by using a plate-shaped dipole conductor antenna pattern.

(Eighth Embodiment) Next, a multi-frequency antenna for a portable radio device according to an eighth embodiment of the present invention will be described with reference to FIG. As shown in FIG.
In the multi-frequency antenna according to the present embodiment, conductor antenna patterns 11a and 11b that are divided into two are formed on the surface layer of mounting substrate 100 that constitutes a portable wireless device. Further, the conductor antenna pattern 11c is formed on the mounting board inner layer 102.
To form conductor antenna patterns 11b and 11c
Are connected by conductor through holes 12. One end of each of the conductor antenna patterns 11a and 11b is connected to the chip component mounting lands 2a and 2b. The conductor antenna patterns 11a, 11b and 11c are fed by the antenna feeding portion 3, and the reactance component 4 such as a chip inductor or a chip capacitor is mounted on the chip component mounting lands 2a and 2b.

By configuring as described above,
Like the first embodiment, the multi-frequency antenna according to the present embodiment is built in the portable wireless device and can resonate in two or more frequency bands, so that the mounting substrate and the antenna of the portable wireless device are separated from each other. In addition to being integrally moldable, the conductor antenna pattern can be formed on each surface of the mounting board, so that the component mounting area of the board can be increased.

(Ninth Embodiment) Next, with reference to FIG. 9, a multi-frequency antenna for a portable radio device according to a ninth embodiment of the present invention will be described. Here, as an example, the multi-frequency antenna according to the fourth embodiment will be described. As shown in FIG. 9, the multi-frequency antenna according to the present embodiment has a mounting board 100 that constitutes a portable wireless device.
Then, the conductor antenna patterns 7a and 7b divided into two are formed. Conductor antenna patterns 7a and 7b
One end of each is connected to the reactance component 13 formed of a conductor pattern. The conductor antenna patterns 7a and 7b are fed by the antenna feeding unit 3.

By configuring as described above,
Like the first embodiment, the multi-frequency antenna according to the present embodiment is built in the portable wireless device and can resonate in two or more frequency bands, so that the mounting substrate and the antenna of the portable wireless device are separated from each other. In addition to being integrally molded, the number of mounted components used on the board can be further reduced. In addition, in this Embodiment, although it demonstrated using the conductor antenna patterns 7a and 7b described in 4th Embodiment,
The same effect can be obtained by using the conductor antenna pattern described in any of the first to third embodiments and the fifth to eighth embodiments.

(Tenth Embodiment) Next, with reference to FIG. 10, a multi-frequency antenna for a portable radio device according to a tenth embodiment of the present invention will be described. Here, the multi-frequency antenna described in the first embodiment will be used as an example for description. As shown in FIG. 10, the multi-frequency antenna according to the present embodiment has a conductor antenna pattern 1a divided into two parts on a mounting substrate 100 that constitutes a portable wireless device.
And 1b are formed. One end of each of the conductor antenna patterns 1a and 1b is connected to the chip component mounting lands 2a and 2b. Conductor antenna patterns 1a and 1
b is fed by the antenna feeding unit 3, and the reactance component 4 such as a chip inductor or a chip capacitor is mounted on the chip component mounting lands 2a and 2b. Further, the impedance matching parasitic element 14 is arranged near the conductor antenna patterns 1a and 1b.

By configuring as described above,
Like the first embodiment, the multi-frequency antenna according to the present embodiment is built in the portable wireless device and can resonate in two or more frequency bands, so that the mounting substrate and the antenna of the portable wireless device are separated from each other. In addition to being integrally molded, the effect of facilitating impedance matching can be obtained without using a lumped constant. In the present embodiment, the conductor antenna patterns 1a and 1b described in the first embodiment are used for explanation, but the second to ninth embodiments are also explained.
Similar effects can be obtained by using the conductor antenna pattern according to any one of the embodiments.

(Eleventh Embodiment) Next, with reference to FIG. 11, a multi-frequency antenna for a portable radio device according to an eleventh embodiment of the present invention will be described. Here, the multi-frequency antenna described in the first embodiment will be used as an example for description. As shown in FIG. 11, the multi-frequency antenna according to the present embodiment has a conductor antenna pattern 1a divided into two on a mounting substrate 100 that constitutes a portable wireless device.
And 1b are formed. One end of each conductor antenna pattern is connected to the chip component mounting lands 2a and 2b. The conductor antenna patterns 1a and 1b are fed by the antenna feeding unit 3 and are mounted on the chip component mounting land 2a.
Reactance components 4 such as a chip inductor and a chip capacitor are mounted on and 2b. Further, the impedance matching parasitic element 15 formed of a conductor pattern is arranged on the mounting substrate 100.

By configuring as described above,
Like the tenth embodiment, the multi-frequency antenna according to the present embodiment is built in the portable wireless device and can resonate in two or more frequency bands, and the mounting substrate of the portable wireless device and the antenna are Since it can be integrally molded, impedance matching can be easily achieved without using a lumped constant, and the number of parts used in a portable wireless device can be reduced. In the present embodiment, the conductor antenna patterns 1a and 1b described in the first embodiment are used.
However, the same effect can be obtained by using the conductor antenna pattern according to any of the second to ninth embodiments.

(Twelfth Embodiment) Next, with reference to FIG. 12, a multi-frequency antenna for a portable radio device according to a twelfth embodiment of the present invention will be described. Here, the multi-frequency antenna described in the first embodiment will be used as an example for description. As shown in FIG. 12, the multi-frequency antenna according to the present embodiment has a conductor antenna pattern 1a divided into two parts on a mounting substrate 100 that constitutes a portable wireless device.
And 1b are formed. One end of each of the conductor antenna patterns 1a and 1b is connected to the chip component mounting lands 2a and 2b. Conductor antenna patterns 1a and 1
b is fed by the antenna feeding unit 3. A reactance component 4 such as a chip inductor or a chip capacitor is mounted on the chip component mounting lands 2a and 2b. Further, a parasitic element 16 that operates as a director or a reflector is arranged near the conductor antenna patterns 1a and 1b.

By configuring as described above,
Like the first embodiment, the multi-frequency antenna according to the present embodiment is built in the portable wireless device and can resonate in two or more frequency bands, so that the mounting substrate and the antenna of the portable wireless device are separated from each other. In addition to being integrally molded, the parasitic element 16 can be used to manipulate the directivity of the antenna radiation to radiate strongly in any direction. In addition,
In the present embodiment, the conductor antenna patterns 1a and 1b described in the first embodiment are used for description, but the second embodiment is described.
The same effect can be obtained by using the conductor antenna pattern according to any of the ninth to ninth embodiments.

(Thirteenth Embodiment) Next, with reference to FIG. 13, a multi-frequency antenna for a portable radio device according to a thirteenth embodiment of the present invention will be described. Here, the multi-frequency antenna described in the first embodiment will be used as an example for description. As shown in FIG. 13, the multi-frequency antenna according to the present embodiment has a conductor antenna pattern 1a divided into two on a mounting substrate 100 that constitutes a portable wireless device.
And 1b are formed. Each one end of the conductor antenna pattern is connected to the chip component mounting lands 2a and 2b, and the conductor antenna patterns 1a and 1b are fed by the antenna feeding unit 3. Land for mounting chip components 2
A reactance component 4 such as a chip inductor or a chip capacitor is mounted on a and 2b. Further, on the mounting substrate 100, the parasitic element 17 formed of a conductor pattern and operating as a director or a reflector is arranged.

By configuring as described above,
Like the twelfth embodiment, the multi-frequency antenna according to the present embodiment is built in the portable wireless device and can resonate in two or more frequency bands, and the mounting substrate and the antenna of the portable wireless device are separated from each other. Parasitic element 17 that can be integrally molded
Thus, the directivity of the antenna radiation can be manipulated to strongly radiate in any direction, and the number of parts used in the portable wireless device can be reduced. Although the conductor antenna patterns 1a and 1b described in the first embodiment are used in the present embodiment, the conductor antenna patterns described in any of the second to ninth embodiments are used. However, the same effect can be obtained.

[0041]

The multi-frequency antenna according to the present invention is constructed as described above, and in particular, by constructing the antenna with a conductor pattern on the mounting substrate constituting the portable radio, it can be built in the portable radio. Moreover, it is possible to realize a multi-frequency antenna that resonates in a plurality of frequency bands.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a multi-frequency antenna according to a first embodiment of the present invention,

FIG. 2 is a perspective view showing a configuration of a multi-frequency antenna according to a second embodiment of the present invention,

FIG. 3 is a perspective view showing a configuration of a multi-frequency antenna according to a third embodiment of the present invention,

FIG. 4 is a perspective view showing a configuration of a multi-frequency antenna according to a fourth embodiment of the present invention,

FIG. 5 is a perspective view showing a configuration of a multi-frequency antenna according to a fifth embodiment of the present invention,

FIG. 6 is a perspective view showing a configuration of a multi-frequency antenna according to a sixth embodiment of the present invention,

FIG. 7 is a perspective view showing a configuration of a multi-frequency antenna according to a seventh embodiment of the present invention,

FIG. 8 is a perspective view showing a configuration of a multi-frequency antenna according to an eighth embodiment of the present invention,

FIG. 9 is a perspective view showing a configuration of a multi-frequency antenna according to a ninth embodiment of the present invention,

FIG. 10 is a perspective view showing a configuration of a multi-frequency antenna according to a tenth embodiment of the present invention,

FIG. 11 is a perspective view showing a configuration of a multi-frequency antenna according to an eleventh embodiment of the present invention,

FIG. 12 is a perspective view showing a configuration of a multi-frequency antenna according to a twelfth embodiment of the present invention,

FIG. 13 is a perspective view showing a configuration of a multi-frequency antenna according to a thirteenth embodiment of the present invention,

FIG. 14 is a frequency-VSWR characteristic diagram showing the characteristic of the multi-frequency antenna according to the embodiment of the present invention;

FIG. 15 is a perspective view showing a configuration of an antenna of a conventional portable wireless device.

[Explanation of symbols]

1a Conductor antenna pattern on the feeding point side 1b Conductor antenna pattern on the opposite side to the feeding point 2a, 2b Chip component mounting land 3 Antenna feeding point 4 Reactance element 5a Polygonal conductor antenna pattern on the feeding point side 5b On the opposite side to the feeding point Polygonal conductor antenna pattern 6a Meander conductor antenna pattern 6b on the feeding point side Meander conductor antenna pattern 7a on the opposite side to the feeding point Inverse L on the feeding point side Conductor antenna pattern 7b that constitutes the antenna Inverse L on the opposite side to the feeding point Conductor antenna pattern 8a forming an antenna Conductor antenna pattern 8b forming an inverted F antenna on the feeding point side Conductor antenna pattern 9a forming an inverted F antenna on the opposite side to the feeding point Helical antenna pattern 9b on the feeding point side Helical antenna pattern 10a on the opposite side. Conductor antenna pattern 10b Dipole conductor antenna pattern 11a on the opposite side to the feeding point Conductor antenna pattern 11b on the feeding point side Conductor antenna pattern 11c on the opposite side to the feeding point Conductor antenna pattern 12 formed on the inner layer of the mounting board 12 Conductor through hole 13 Reactance component 14 composed of a conductor pattern 14 Parasitic element 15 for impedance matching Parasitic element 16 for impedance matching composed of a conductor pattern Parasitic element 17 acting as a director or reflector Waveguide composed of a conductor pattern Element 50 that operates as a reflector or reflector 50 Radio base plate 60 λ / 4 monopole antenna 100 Mounting board 101 that constitutes a portable radio device Mounting board GND 102 that constitutes a portable radio device Inner layer of a mounting substrate that constitutes a portable radio device

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H01Q 9/16 H01Q 9/16 9/42 9/42 13/08 13/08 F term (reference) 5J045 AA03 AB05 AB06 DA08 HA06 NA01 5J046 AA02 AA04 AB06 AB13 PA04 PA07 5J047 AA02 AA04 AB06 AB13 FD01

Claims (14)

[Claims] 1. A conductor antenna pattern formed on a mounting substrate, which is divided into a plurality of parts to form a portable radio device, and a reactance component connected between the plurality of divided conductor antenna patterns. A characteristic multi-frequency antenna. 2. The multifrequency antenna according to claim 1, wherein the conductor antenna pattern is formed in a polygonal shape. 3. The multifrequency antenna according to claim 1, wherein the conductor antenna pattern is formed in a meandering shape. 4. The multi-frequency antenna according to claim 1, wherein the conductor antenna pattern is formed in an inverted L shape. 5. The multifrequency antenna according to claim 1, wherein the conductor antenna pattern is formed in an inverted F shape. 6. The multi-frequency antenna according to claim 1, wherein the conductor antenna pattern is formed in a helical shape. 7. The multi-frequency antenna according to claim 1, wherein the conductor antenna pattern is a dipole conductor antenna pattern. 8. The conductor antenna pattern is dividedly arranged on both surface layers and inner layers of the mounting board, and the mounting board is provided with conductor through holes for conducting the divided conductor antenna patterns. 8. The multi-frequency antenna according to any one of 1 to 7. 9. The multi-frequency antenna according to claim 1, wherein the reactance component is formed of a conductor pattern on the same surface of the mounting board. 10. The multi-frequency antenna according to claim 1, further comprising a parasitic element having an impedance matching function near the conductor antenna pattern. 11. The multi-frequency antenna according to claim 10, wherein the parasitic element is formed on the mounting substrate by a conductor pattern. 12. The multi-frequency antenna according to claim 1, further comprising a parasitic element having a function as a director or a reflector near the conductor antenna pattern. 13. The multi-frequency antenna according to claim 12, wherein the parasitic element is formed on the mounting substrate by a conductor pattern. 14. A portable radio device comprising the multi-frequency antenna according to claim 1.