JP2009284189A - Antenna apparatus and electronic device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized antenna apparatus of excellent development efficiency, radiation characteristics and impedance characteristics, in a portable electronic device such as a cellular phone. <P>SOLUTION: The antenna apparatus 10 includes: a motor 11 partially constituted of a conductor; a first terminal 12 configured in the motor 11; a first connection line 13 whose one part is electrically connected to the first terminal 12; a power supply part 14 electrically connected to the other part of the first connection line 13; a high frequency circuit 15 electrically connected to the power supply part 14; a ground plate 16 on which the high frequency circuit 15 is loaded; a second terminal 17 connected to the motor 11; a second connection line 18 whose one part is electrically connected to the second terminal 17; and a short circuit part 19 electrically connected to the other part of the second connection line 18 and loaded on the ground plate 16. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an antenna device used for, for example, a mobile phone and an electronic apparatus using the antenna device.

  For example, a conventional antenna device used for a mobile phone has a configuration as shown in FIGS. 14 (a) and 14 (b). 14A and 14B, the conventional antenna device 1 is built in the lower region of the lower housing 3 of the mobile phone 2.

  In the vicinity of the conventional antenna device 1, a ground substrate 4 and a motor 5 are built in the mobile phone 2.

  The motor 5 generates vibration by rotating an eccentric rotating mechanism (not shown) inside. When the vibration is transmitted to the mobile phone 2, the mobile phone 2 vibrates. As a result, the mobile phone 2 can obtain an informing means that does not require sound.

  In addition, there is an increasing demand for miniaturization of the mobile phone 2. As a result, it has become difficult to arrange the antenna device 1 and the motor 5 inside.

From such a situation, there is one in which the antenna device 1 and the motor 5 are integrally formed. As prior art document information related to the invention of the present application, for example, Patent Document 1 or Patent Document 2 is known.
JP-A-9-181638 Japanese Patent Laid-Open No. 10-41725

  In the conventional antenna device 1, since the motor 5 is disposed close to the antenna device 1, the antenna device 1 and the motor 5 are electromagnetically coupled, and the antenna characteristics of the antenna device 1 are significantly deteriorated.

  Furthermore, since the antenna device 1 and the motor 5 are separate components, there is a limit to downsizing the mobile phone 2.

  Further, after arranging the antenna device 1 in the mobile phone, it is necessary to redesign the antenna shape of the antenna device 1 in consideration of the influence of electromagnetic coupling with the motor 5 and adjust the antenna characteristics.

  Therefore, the present invention realizes an antenna device with high design and development efficiency while realizing miniaturization of the antenna device and avoidance of characteristic deterioration after mounting an electronic device such as a mobile phone, and eliminating the necessity of significant redesign of the characteristic. The purpose is to provide.

  In order to achieve this object, an antenna device according to the present invention includes a motor partially composed of a conductor, a first terminal configured in the motor, and one of the first terminals electrically connected to the first terminal. A first connection line; a power supply unit electrically connected to the other of the first connection lines; a high-frequency circuit electrically connected to the power supply unit; and a ground plate on which the high-frequency circuit is mounted. It is a configuration.

  In the above configuration, the motor and the first connection line are each configured to actively operate as a part of the antenna element. Therefore, compared with the case where the motor and the antenna element are configured separately, the mobile phone can be downsized.

  Further, since electromagnetic coupling between the antenna element and the motor can be avoided, a large-scale design change of the antenna element or the like is not required after the antenna device is mounted on an electronic device such as a mobile phone.

(Embodiment 1)
Embodiment 1 of the present invention will be described below with reference to FIG. FIG. 1 is a schematic diagram of an antenna device according to the first embodiment. In FIG. 1, an antenna device 10 according to Embodiment 1 includes a motor 11 that is partially configured with a conductor, a first terminal 12 that is configured in the motor 11, and one that is electrically connected to the first terminal 12. The first connection line 13, the power supply unit 14 electrically connected to the other of the first connection lines 13, the high-frequency circuit 15 electrically connected to the power supply unit 14, and the high-frequency circuit 15 are mounted. The ground plate 16, the second terminal 17 connected to the motor 11, the second connection line 18 electrically connected to the second terminal 17, and the other of the second connection lines 18 are electrically connected. And a short circuit portion 19 mounted on the ground plate 16.

  After the high frequency signal transmitted from the high frequency circuit 15 is supplied to the power supply unit 14, the high frequency signal is transmitted through the first connection line 13, the first terminal 12, the motor 11, the second terminal 17, the second connection line 18, and the short circuit unit 19. It is also propagated to the ground plate 16. Thereby, the 1st connection line 13, the 1st terminal 12, the motor 11, the 2nd terminal 17, the 2nd connection line 18, the short circuit part 19, and the ground board 16 will mainly operate | move as an antenna.

  With such a configuration, the antenna device 10 of the first embodiment is characterized in that the conventional motor 5 shown in FIG. 14 is actively operated as a part of the antenna device. As a result, the motor area can be used as the antenna element area as compared with the conventional antenna apparatus, so that the antenna apparatus can be equivalently enlarged, and the antenna apparatus can be widened and radiation efficiency can be improved. . Further, since the antenna device 1 and the motor 5 of FIG. 14 can be realized by a single component, it is easy to incorporate into an electronic device such as a mobile phone, and the electronic device can be miniaturized. .

  In the antenna device 10 of FIG. 1, the length of at least one of the first connection line 13 and the second connection line 18 can be adjusted according to the corresponding frequency of the antenna device 10. Thereby, the corresponding frequency can be changed without changing the shape of the motor 11 of the antenna device 10. As a result, the low-cost antenna device 10 can be provided using highly versatile parts.

  Furthermore, the antenna device 10 has a small impedance when placed close to the ground plate 16, but by connecting one of the second connection wires 18 to the short-circuit portion 19 mounted on the ground plate 16, Impedance matching can be achieved by changing the impedance of the antenna device 10 as viewed from the power supply unit 14.

  Moreover, the 1st connection line 13 and the 2nd connection line 18 can be comprised with a lead wire. By using the lead wire, an antenna device that can be easily mounted on a portable terminal at low cost can be realized. Further, by disposing the motor 11, the first connection line 13, and the second connection line 18 from the surface of the ground plate 16, the electronic device can be reduced in thickness, and the ground plate 16, the motor 11, and the first connection line can be reduced. Since the electromagnetic coupling between the connection line 13 and the second connection line 18 can be reduced, an antenna device having wideband characteristics can be realized.

  Furthermore, the characteristic of the antenna device 10 can be improved by configuring the conductor which is at least a part of the motor 11 with a material having high conductivity. Moreover, the characteristics of the antenna device 10 can also be improved by using a material with little loss for the magnetic body for constituting the rotation mechanism (not shown) of the motor 11.

  2A is an upper perspective view showing a specific example of the motor 11 constituting the antenna device 10, and FIG. 2B is a side perspective view. About the same structure as FIG. 1, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and only a different point is described. One of the motors 11 is electrically connected to the first terminal 12, and is disposed inside the case 27. The third connection line 20 is electrically connected to the other of the third connection lines 20. And a rotating part 26 that is electrically connected to the third terminal 22 and rotates around the shaft 25 protruding from the case 27, and a part different from the part electrically connected to the third terminal 22 of the rotating part 26 A fourth terminal 23 electrically connected to the first terminal 23, a fourth connection line 21 electrically connected to the fourth terminal 23, and the other electrically connected to the second terminal 17; It is the structure provided with the ring-shaped magnetic body 24 arrange | positioned. At least the first terminal 12, the second terminal 17, the third terminal 22, and the fourth terminal 23 are formed of conductors.

  The rotating part 26 has an eccentric shape with respect to the shaft 25, and generates an electromagnetic field by causing a current to flow through a coil (not shown) of the rotating part 26, and is rotated by a magnetic field generated by the magnetic body 24. Can be generated. The rotation part 26 should just be comprised with the conductor partially. In addition, the embodiment of the present invention is an example, and the present invention can be applied to motors other than this shape.

(Embodiment 2)
Hereinafter, Embodiment 2 of the present invention will be described with reference to FIG. FIG. 3 is a schematic diagram of the antenna device 10 according to Embodiment 2 of the present invention. In addition, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and only a different point is described.

  3 is different from the antenna device of the first embodiment shown in FIG. 1 in that the first connection line 13 and the second connection line 18 of FIG. is there.

  By adopting this configuration, the shapes of the first connection line 13 and the second connection line 18 become constant, the characteristic change of the antenna device 10 can be suppressed, and the antenna device is mounted on an electronic device such as a mobile phone. Later, the design of the antenna element and the like becomes simpler.

(Embodiment 3)
Hereinafter, Embodiment 3 of the present invention will be described with reference to FIG. FIG. 4 is a schematic diagram of the antenna device 10 according to Embodiment 3 of the present invention. In addition, about the structure similar to Embodiment 1, 2, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and only a different point is described.

  In FIG. 4, the difference from the antenna device of Embodiment 1 shown in FIG. 1 and FIG. 2 and Embodiment 2 shown in FIG. 3 is in the middle of the first connection line 13 formed of a conductor pattern. The second inductance element 41 is configured in the middle of the second connection line 18 composed of the first inductance element 40 and the conductor pattern. The first inductance element 40 and the second inductance element 41 are usually configured by a chip coil or the like.

  By adopting this configuration, the corresponding frequency of the antenna device 10 can be changed by replacing the first inductance element 40 and the second inductance element 41. As a result, the antenna device 10 can be adjusted without changing the shape of the conductor pattern, so that design of the antenna element and the like can be performed more easily and at low cost.

(Embodiment 4)
The fourth embodiment of the present invention will be described below with reference to FIG. FIG. 5 is a schematic diagram of the antenna device 10 according to Embodiment 4 of the present invention. In addition, about the structure similar to Embodiment 1-3, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and only a different point is described. 4 is different from the antenna device of the first embodiment shown in FIGS. 1 and 2, the second embodiment shown in FIG. 3, and the third embodiment shown in FIG. The side electrically connected to the first terminal 12 is constituted by a lead wire, and the side electrically connected to the power feeding unit 14 is constituted by a conductor pattern formed on the substrate 30. The two connection lines 18 are divided, the side electrically connected to the second terminal 17 is constituted by a lead wire, and the side electrically connected to the short circuit part 19 is constituted by a conductor pattern constituted on the substrate 30. It is a point that has been configured.

  As in this configuration, the connection on the side of the motor 11 that vibrates is configured with a movable lead wire, and the connection on the side of the power supply unit 14 is configured with a conductor pattern on the substrate, so that the substrate when the motor 11 vibrates 30 prevents cracking, and suppresses changes in the characteristics of the antenna device 10 because the number of portions with a constant shape increases compared to the case where the first connection line 13 and the second connection line 18 are entirely composed of lead wires. After the antenna device is mounted on an electronic device such as a mobile phone, the design of the antenna element and the like becomes simpler.

  Furthermore, since the antenna device 10 can be adjusted by the first inductance element 40 and the second inductance element 41 as configured in the third embodiment, design of the antenna element and the like can be performed more easily and at low cost.

(Embodiment 5)
Embodiment 5 of the present invention will be described below with reference to FIG. FIG. 6 is a schematic diagram of the antenna device 10 according to the fifth embodiment of the present invention. In addition, about the structure similar to Embodiment 1-4, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and only a different point is described.

  5, the antenna device of the first embodiment shown in FIGS. 1 and 2, the second embodiment shown in FIG. 3, the third embodiment shown in FIG. 4, and the fourth embodiment shown in FIG. The difference is that the conductor 60 connected to the power supply unit 14 is configured.

  By adopting this configuration, the antenna device 10 can cope with the frequency band corresponding to the resonance by the conductor 60, so that the multiband configuration in which the antenna device 10 can cope with two frequency bands can be realized.

  Furthermore, since the motor 11 actively operates as an antenna element, the conductor 60 can operate as an antenna element even when the conductors 60 are arranged close to each other. That is, since the motor 11 and the conductor 60 can be arranged closer to each other than when separately arranged, the antenna device can be downsized.

  Further, as shown in FIG. 6, by arranging the open end of the conductor 60 so as to protrude from the motor 11, electromagnetic coupling between the conductor 60 and the motor 11 can be reduced, so that radiation from the conductor 60 can be more efficiently performed. The radiation characteristics of the antenna device 10 can be improved.

  In this embodiment, an example corresponding to two frequencies is shown. However, by adding a conductor, it is possible to increase the frequencies that can correspond to three frequency bands and four frequency bands.

  Further, a multiband may be achieved by adding a conductor to the short-circuit portion 19.

(Embodiment 6)
The sixth embodiment of the present invention will be described below with reference to FIGS. FIG. 7 shows a schematic diagram of an antenna device 10 according to Embodiment 6 of the present invention. In addition, about the structure similar to Embodiment 1-5, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and only a different point is described.

  7, the first embodiment shown in FIG. 1 and FIG. 2, the second embodiment shown in FIG. 3, the third embodiment shown in FIG. 4, the fourth embodiment shown in FIG. 5, and the FIG. The difference from the antenna device of the fifth embodiment shown is that a high-pass filter type circuit 70 that connects between the power feeding unit 14 and the high-frequency circuit 15 and a low-pass filter type circuit 71 that is electrically connected to the power feeding unit 14. And a motor power terminal 72 electrically connected to the low-pass filter type circuit 71 is configured.

  The low frequency signal of the DC power supply is not transmitted to the high frequency circuit 15 by the high pass filter type circuit 70. On the other hand, the high frequency signal entering / exiting the high frequency circuit 15 is not transmitted to the motor power supply terminal 72 side by the low pass filter type circuit 71.

  With this configuration, since a battery or the like (not shown) can be connected to the motor power terminal 72, a DC voltage can be applied to the motor 11 from the motor power terminal 72.

  Further, the first connection line 13 can be shared as a line for supplying DC power to the motor 11. Furthermore, by electrically connecting the second connection line 18 and the short-circuit portion 19, the second connection line 18 can match the antenna and can be shared as a line for supplying DC power to the motor 11.

  An example of a specific circuit configuration is shown in FIG. In FIG. 8, a first coil 80 electrically connected between the power feeding unit 14 and the ground, a first capacitor 81 electrically connected to the first coil 80, and an electrical connection between the first capacitor 81 and the ground. The high-pass filter type circuit 70 is configured with the second coil 82 connected to. That is, the low frequency band signal including the DC power supply is not transmitted to the high frequency circuit 15 by the high pass filter circuit 70, and the high frequency circuit 15 can be protected. Furthermore, the high-pass filter type circuit 70 can also be operated as a matching circuit of the antenna device 10.

  In FIG. 8, the second capacitor 83 electrically connected between the power supply unit 14 and the ground, the third coil 84 electrically connected to the second capacitor 83, and the third coil 84 and the ground. The third capacitor 85 that is electrically connected constitutes a low-pass filter type circuit 71. That is, the high-frequency signal entering / exiting the high-frequency circuit 15 is not transmitted to the motor power supply terminal 72 side by the low-pass filter type circuit 71, and the characteristic deterioration of the antenna device can be avoided.

  However, the low-pass filter type circuit 71 needs to be configured to allow a direct current to pass through. With such a circuit configuration, for example, the high-pass filter type circuit 70 may be configured by only the first capacitor 81, and the low-pass filter type circuit 71 may be configured by only the third coil 84, which is limited to the present embodiment. It is not something.

(Embodiment 7)
The seventh embodiment of the present invention will be described below with reference to FIGS. FIG. 9 shows a schematic diagram of an antenna device 10 according to Embodiment 7 of the present invention. In addition, about the structure similar to Embodiment 1-6, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and only a different point is described. 9, the first embodiment shown in FIGS. 1 and 2, the second embodiment shown in FIG. 3, the third embodiment shown in FIG. 4, the fourth embodiment shown in FIG. 5, and the FIG. A difference from the antenna device of the sixth embodiment shown in FIGS. 5, 7, and 8 is that the power feeding unit 14 and the high frequency circuit 15 are connected by a low noise amplifier 90. By connecting the low noise amplifier 90 as in this configuration, it is possible to improve the reception sensitivity particularly for a reception system such as a GPS (Global Positioning System) or a digital television.

  A specific circuit configuration example of the low noise amplifier 90 is shown in FIG. In FIG. 10, a series resonance circuit 101 including a coil 102 and a capacitor 103 connected to the power supply unit 14, a coil 104 connected between the output of the series resonance circuit 101 and the ground, and a gate terminal to the capacitor 103 and the coil 104. Are electrically connected, a coil 107 connected between the source terminal of the field effect transistor 105 and the ground, a transistor power supply terminal 106 connected to the drain terminal of the field effect transistor 105, and a drain terminal. And a high-frequency circuit 15 connected to a connection point between the transistor power supply terminal 106 and the transistor power supply terminal 106. In this case, the transistor power supply terminal 106 is connected to a battery (not shown) and supplies power to the field effect transistor 105. Furthermore, the antenna element on the first connection unit 13 side from the power supply unit 14 functions as an antenna device that receives a digital television using the UHF band (470 MHz to 770 MHz), and the impedance characteristic is capacitive in the vicinity of 470 MHz. ing. Further, the impedance characteristic of the field effect transistor 105 is inductive in the vicinity of 470 MHz by the coil 104, has a relationship of substantially complex conjugate matching with the antenna element, and is received by the antenna device 10 that is smaller than the wavelength. Sensitivity can be improved.

  The series resonant circuit 101 operates as a bandpass filter that passes the UHF band and attenuates a signal for a 900 MHz band mobile phone, and the coil 102 functions as an electrical length correction element that increases the electrical length of the antenna element. To do. As a result, in the UHF band, it is possible to make the impedance characteristic of the antenna element that is small compared with the wavelength capacitive in the vicinity of 470 MHz and inductive in the 770 MHz. In this case, the impedance characteristic of the field effect transistor 105 is adjusted to be inductive by the coil 104 at around 470 MHz and at the same time to be capacitive at around 770 MHz, and substantially complex conjugate matching with the antenna element at around 470 MHz and 770 MHz. This relationship can be realized. Therefore, the antenna device 10 can operate in a wide band, and it can be expected that the antenna is miniaturized and the high sensitivity characteristics are satisfied at the same time.

  Note that the antenna element and the field effect transistor have a substantially complex conjugate matching in the vicinity of 470 MHz and 770 MHz, and when the mismatch loss is small, the pass gain in the field effect transistor is increased in the vicinity of 470 MHz and 770 MHz. Since there is a case, the insertion gain near the 470 MHz and 770 MHz can be frequency-selectively reduced by inserting the coil 107. In this case, the frequency characteristic of the pass gain of the field effect transistor becomes gentle, and at the same time, the reception sensitivity characteristic of the antenna device is maintained in a wide band, so that the stability of the low noise amplifier is improved.

  Note that in this embodiment, digital television reception is shown as an example, but the present invention can also be applied to a system such as GPS or FM radio.

(Embodiment 8)
The eighth embodiment of the present invention will be described below with reference to FIGS. FIG. 11A is an upper perspective view of the antenna device 10 according to the eighth embodiment of the present invention, and FIG. 11B is a side perspective view. In addition, about the structure similar to Embodiment 1-7, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and only a different point is described.

  11, the first embodiment shown in FIGS. 1 and 2, the second embodiment shown in FIG. 3, the third embodiment shown in FIG. 4, the fourth embodiment shown in FIG. 5, and the FIG. The difference from the antenna device of the fifth embodiment shown in FIG. 5, the sixth embodiment shown in FIG. 7 and FIG. 8, the seventh embodiment shown in FIG. 9 and FIG. The antenna device 10 described in the first to seventh embodiments of the present invention is disposed at the end of the antenna.

  With this configuration, the antenna device 10 vibrates, so that the mobile phone 110 can obtain a notification means that does not require sound. Furthermore, since the antenna device 10 is downsized, the mobile phone 110 can also be downsized. Further, since the antenna device 10 is arranged at the end of the mobile phone 110, the influence from other components can be reduced and the distance from the ground plate 16 can be made relatively large. Characteristics (impedance characteristics) and radiation characteristics can be improved.

  FIG. 12 is a diagram showing another example of the eighth embodiment of the present invention. FIG. 12A shows an upper perspective view of the antenna device 10 according to the eighth embodiment of the present invention, and FIG. 12B shows a side perspective view. The difference between FIG. 12 and FIG. 11 is that the antenna device 10 described in the first to seventh embodiments of the invention is arranged at the end in the upper housing 120 of the mobile phone 10.

  With this configuration, the antenna device 10 vibrates, so that the mobile phone 110 can obtain a notification means that does not require sound. Furthermore, since the antenna device 10 is downsized, the mobile phone 110 can also be downsized. Further, since the antenna device 10 is arranged at the end of the mobile phone 110, the influence from other components can be reduced and the distance from the ground plate 16 can be made relatively large. Characteristics (impedance characteristics) and radiation characteristics can be improved.

  Furthermore, since the upper housing 120 is often not gripped when used, the possibility that the antenna device 10 is gripped is reduced, and deterioration of the characteristics of the antenna device 10 can be suppressed.

  Further, although the embodiment of the present invention has been described with reference to a diagram of a foldable mobile phone, the present invention is not limited to this configuration, and may be used for, for example, a straight-type mobile phone or a slide-type mobile phone. Is possible.

  Furthermore, the present invention can be applied to any electronic device including an antenna device and a motor.

(Embodiment 9)
The ninth embodiment of the present invention will be described below with reference to FIG. FIG. 13 shows a block diagram of antenna apparatus 10 according to the ninth embodiment of the present invention. In addition, about the structure similar to Embodiment 1-8, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and only a different point is described.

  In FIG. 13, the first embodiment shown in FIGS. 1 and 2, the second embodiment shown in FIG. 3, the third embodiment shown in FIG. 4, the fourth embodiment shown in FIG. 5, and the FIG. Embodiment 5 shown in FIG. 7, Embodiment 6 shown in FIG. 8, FIG. 9, Embodiment 7 shown in FIG. 10, FIG. 10, Antenna device of Embodiment 8 shown in FIG. The difference is that a noise amplification circuit 130, a noise phase control circuit 131 electrically connected to the antenna device 10, a signal amplification circuit 133 electrically connected to the signal receiving antenna 132, and a noise cancellation circuit 134 are configured. It is a point.

  With this configuration, the antenna device 10 picks up noise generated from a noise source (not shown), cancels noise mixed in the signal received by the signal receiving antenna 132, and improves the characteristics of the signal receiving antenna 132. Can be made. Also in this case, since the antenna device 10 can be realized by the motor 11 and one component, it is easy to incorporate the electronic device into an electronic device such as a mobile phone, and the electronic device can be downsized. Furthermore, the motor 11 constituting the antenna device 10 has a relatively high degree of freedom in the layout in the terminal, and can be brought closer to the noise source relatively easily.

  As described above, the present invention can provide an antenna device that is excellent in development efficiency, small in size, and excellent in radiation characteristics and impedance characteristics, for example, in portable electronic devices such as cellular phones.

Schematic diagram of the antenna device in the first embodiment of the present invention (A) Upper perspective view of the motor in the first embodiment of the present invention, (b) Side perspective view of the motor in the first embodiment of the present invention. Schematic diagram of the antenna device in the second embodiment of the present invention Schematic diagram of an antenna device according to a third embodiment of the present invention Schematic diagram of an antenna device according to a fourth embodiment of the present invention Schematic diagram of an antenna device according to a fifth embodiment of the present invention Schematic diagram of an antenna device according to a sixth embodiment of the present invention Circuit diagram in the sixth embodiment of the present invention Schematic diagram of an antenna device according to a seventh embodiment of the present invention Circuit diagram in the seventh embodiment of the present invention (A) Upper perspective view of the antenna device in the eighth embodiment of the present invention, (b) Side perspective view of the antenna device in the eighth embodiment of the present invention. (A) Upper perspective view of the antenna device in the eighth embodiment of the present invention, (b) Side perspective view of the antenna device in the eighth embodiment of the present invention. The block diagram of the antenna apparatus in the 9th Embodiment of this invention (A) Top perspective view of a conventional antenna device, (b) Side perspective view of a conventional antenna device

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Antenna apparatus 11 Motor 12 1st terminal 13 1st connection line 14 Electric power feeding part 15 High frequency circuit 16 Ground board 17 2nd terminal 18 2nd connection line 19 Short circuit part 20 3rd connection line 21 4th connection line 22 3rd terminal 23 Fourth terminal 24 Magnetic body 25 Axis 26 Rotating part 27 Case 30 Substrate 40 First inductance element 41 Second inductance element 60 Conductor 70 High-pass filter type circuit 71 Low-pass filter type circuit 72 Motor power supply terminal 80 First coil 81 First capacitor 82 Second coil 83 Second capacitor 84 Third coil 85 Third capacitor 90 Low noise amplifier 101 Series resonance circuit 102, 104, 107 Coil 103 Capacitor 105 Field effect transistor 106 Transistor power supply terminal 110 Mobile phone 111 Lower housing 12 The upper housing 130 noise amplifier 131 the noise phase control circuit 132 signal receiving antenna 133 signals amplifier 134 the noise cancellation circuit 1 a conventional antenna device 2 conventional cellular phone 3 conventional lower casing 4 conventional ground plate 5 conventional motor

Claims (11)

A motor partially composed of conductors;
A first terminal configured in the motor;
A first connection line, one of which is electrically connected to the first terminal;
A power feeding unit electrically connected to the other of the first connection lines;
A high-frequency circuit electrically connected to the power supply unit;
An antenna device comprising a ground plate on which the high-frequency circuit is mounted. A second terminal configured in the motor;
A second connection line, one of which is electrically connected to the second terminal;
A short-circuit portion mounted on the ground plate electrically connected to the other of the second connection lines,
The antenna device according to claim 1. The first connection line and the second connection line are configured with lead wires,
The antenna device according to claim 2. The first connection line and the second connection line are configured with a conductor pattern configured on a substrate.
The antenna device according to claim 2. It was configured to load inductance in the middle of the conductor pattern,
The antenna device according to claim 4. The first connection line is divided, and a side electrically connected to the first terminal is constituted by a lead wire,
The side electrically connected to the power feeding unit is configured with a conductor pattern configured on a substrate,
The second connection line is divided, and a side electrically connected to the second terminal is constituted by a lead wire,
The side that is electrically connected to the short-circuit portion is configured with a conductor pattern configured on the substrate,
The antenna device according to claim 2. One side was connected to the power feeding part, and the other was provided with a conductor with an open end.
The antenna device according to claim 1. A power terminal;
A high-pass filter type circuit that electrically connects the power feeding unit and the high-frequency circuit;
A low-pass filter type circuit that electrically connects the power supply unit and the power supply terminal;
The antenna device according to claim 1. A low-noise amplifier that electrically connects the power feeding unit and the high-frequency circuit,
The antenna device according to claim 1. An electronic apparatus comprising the antenna device according to claim 1. 11. The electronic device according to claim 10, wherein the antenna device according to one of claims 1 to 9 is configured at an end portion of the electronic device.

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