JP2019201520A - Electronic apparatus - Google Patents

Abstract

To provide an electronic apparatus applicable to both a resonator power reception method and an antenna power reception method when charging a battery.SOLUTION: An electronic apparatus includes: a dielectric substrate 4; a resonator 1, disposed in a first region of the dielectric substrate 4, for receiving first high-frequency power from a power transmission device 200 by electromagnetically coupling with a resonator 201 of the power transmission device 200 when the resonator 1 of the power transmission device 200 is arranged by facing the dielectric substrate 4; an antenna unit 2, disposed in a second region of the dielectric substrate 4, for receiving second high-frequency power from the electromagnetic wave by resonance with electromagnetic waves radiated from an outside space; and a rectifying circuit unit 3, disposed in a third region of the dielectric substrate 4 so that the resonator 1 and the antenna unit 2 are connected in parallel to an input stage, for rectifying the first and second high-frequency power and outputting the rectified electric power to a subsequent stage electrical load 5.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to an electronic device.

  Conventionally, wireless power feeding that transmits power output from a power source to an electric load in a contactless manner is known. This type of wireless power supply technology is particularly applied to battery charging of electronic devices such as mobile phones or home appliances.

  As a method of wireless power feeding, a method of collecting the power of the electromagnetic wave by resonating the antenna with respect to the electromagnetic wave irradiated from the external space (hereinafter referred to as “antenna power receiving method”), and an electromagnetic wave between the resonators A method of recovering electric power from a power transmission device using coupling (hereinafter, referred to as “resonator power receiving method”) or the like is known (for example, see Patent Document 1).

JP 2008-259335 A Japanese Patent No. 6304520

  By the way, the antenna power receiving method is useful in that charging can be performed simultaneously with a plurality of electronic devices, but on the other hand, there is a problem that the power that can be collected per unit time is small and the charging time is long. .

  On the other hand, the resonator power receiving method is useful in that the power that can be recovered per unit time is large and the charging time can be shortened, but it must be arranged adjacent to the resonator on the power transmission device side, Troubles and inconveniences such as carrying around the charger (that is, the resonator of the power transmission device) occur.

  Thus, since the antenna power reception method and the resonator power reception method are different in usage, in an electronic device, both the antenna and the resonator are mounted so that either method can be applied. Alternatively, it is desirable to be able to switch easily according to the situation or the like.

  The present disclosure has been made in view of the above-described problems, and an object thereof is to provide an electronic device that can be applied to both a resonator power reception method and an antenna power reception method when charging a battery.

The main present disclosure for solving the above-described problems is as follows.
A dielectric substrate;
When the resonator of the power transmission device is disposed in the first region of the dielectric substrate and is opposed to the dielectric substrate, it is electromagnetically coupled to the resonator of the power transmission device, thereby causing the first from the power transmission device to A resonator that receives high-frequency power;
An antenna unit disposed in the second region of the dielectric substrate and receiving a second high-frequency power from the electromagnetic wave by resonance with the electromagnetic wave irradiated from an external space;
The resonator and the antenna unit are connected in parallel to the input stage, and are arranged in a third region of the dielectric substrate to rectify the first and second high-frequency powers and A rectifier circuit that outputs to a load;
Is an electronic device.

  The electronic device according to the present disclosure can be applied to both the resonator power reception method and the antenna power reception method when charging the battery.

1 is a diagram showing an example of the overall configuration of an electronic device according to an embodiment. The figure which shows an example of the electric power reception aspect by the resonator electric power reception system in the electronic device which concerns on one Embodiment FIG. 6 is a diagram illustrating an example of a power reception mode in an antenna power reception method in an electronic device according to an embodiment. The top view which shows an example of a structure of the resonator which concerns on one Embodiment, and an antenna part The perspective view which shows an example of a structure of the resonator which concerns on one Embodiment, and an antenna part Side surface sectional view which shows an example of a structure of the resonator and antenna part which concern on one Embodiment The enlarged view which shows an example of a structure of the resonator which concerns on one Embodiment The top view which shows the structure of the resonator of the 1st power transmission apparatus which concerns on one Embodiment. The top view which shows the state which has arrange | positioned the resonator of the 1st power transmission apparatus which concerns on one Embodiment, and the resonator of an electronic device facing each other. The perspective view which shows the state which has arranged the resonator of the 1st power transmission apparatus which concerns on one Embodiment, and the resonator of an electronic device facing each other. Simulation results verifying transfer characteristics of electronic device according to one embodiment

  Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the appended drawings. In the present specification and drawings, components having substantially the same function are denoted by the same reference numerals, and redundant description is omitted.

[Overall configuration of electronic equipment]
Below, the aspect which applied this invention to the mobile phone is demonstrated as an example.

  FIG. 1 is a diagram illustrating an example of the overall configuration of the electronic device 100. FIG. 2 is a diagram illustrating an example of a power reception mode in the resonator power reception method in the electronic device 100. FIG. 3 is a diagram illustrating an example of a power reception mode in the antenna power reception method in the electronic device 100.

  An electronic device 100 according to this embodiment includes a resonator 1, an antenna unit 2, a rectifier circuit unit 3, a dielectric substrate 4, and a battery 5.

  The electronic device 100 according to the present embodiment can be applied to both a resonator power reception method using the resonator 1 and an antenna power reception method using the antenna unit 2 when charging the battery 5. It has a configuration.

  The electronic device 100 is arranged such that its own resonator 1 faces the resonator 201 on the first power transmission device 200 side, as shown in FIG. The In this case, the electronic device 100 collects electric power from the first power transmission device 200 by using electromagnetic coupling between the resonator 1 and the resonator 201. As a result, it is possible to receive a large amount of power, and it is possible to execute rapid charging of the battery 5.

  The first power transmission apparatus 200 includes, for example, an oscillator (not shown) that generates high-frequency power from a commercial power supply (60 Hz, 100 V) and a resonator 201 that acquires high-frequency power from the oscillator. Note that the frequency of the high-frequency power transmitted to the resonator 201 of the first power transmission device 200 is typically a frequency corresponding to the resonance frequency of the resonator 201 and the resonator 1 of the electronic device 100 (for example, , A specific frequency in the millimeter wave band).

  On the other hand, when the electronic device 100 performs power reception by the antenna power reception method, as shown in FIG. 3, the electronic device 100 is disposed in a container in which an electromagnetic wave having a predetermined frequency transmitted by the second power transmission device 300 is propagated. . At this time, the electronic device 100 collects the electric power of the electromagnetic wave propagating in the container by the antenna unit 2 resonating with the electromagnetic wave. Thereby, the electronic device 100 can perform charging simultaneously with other electronic devices (for example, two electronic devices 100_1 and 100_2 shown in FIG. 3) arranged in the container. .

  The second power transmission device 300 is configured to include, for example, a magnetron oscillator, a gun oscillator, or a semiconductor oscillator (for example, an inverter) and an amplifier (not shown) that radiates electromagnetic waves of a predetermined frequency in a container. . Note that the frequency of the high-frequency power transmitted from the second power transmission device 300 is typically a frequency corresponding to the resonance frequency of the antenna unit 2 of the electronic device 100 (for example, a specific frequency in the millimeter wave band). Is set as follows.

  Next, the configuration of each part of the electronic device 100 will be described in detail.

  FIG. 4 is a plan view showing an example of the configuration of the resonator 1 and the antenna unit 2. FIG. 5 is a perspective view showing an example of the configuration of the resonator 1 and the antenna unit 2. FIG. 6 is a side cross-sectional view (side cross-sectional view at the position F-F ′ in FIG. 4) illustrating an example of the configuration of the resonator 1 and the antenna unit 2. FIG. 7 is an enlarged view showing an example of the configuration of the resonator 1.

  The dielectric substrate 4 is a substrate on which the resonator 1, the antenna unit 2, the rectifier circuit unit 3, and the like are disposed. In the dielectric substrate 4, these components (resonator 1, antenna unit 2, and rectifier circuit unit 3) are disposed, and wirings for electrically connecting these components to each other (FIG. 4). L1, L2 and L3) are patterned.

  On the lower surface of the dielectric substrate 4, a ground conductor 4a is formed over the entire region. That is, the wiring formed on the upper surface side of the dielectric substrate 4 is configured as a microstrip line. However, the wiring formed on the dielectric substrate 4 may be configured as a coplanar line or the like.

  Although the material of the dielectric substrate 4 is not particularly limited in the present invention, for example, a sapphire substrate can be used. However, as the dielectric substrate 4, a semiconductor substrate, a PCB (Printed Circuit Board) substrate, or the like may be used, or a multilayer substrate or the like may be used.

  The resonator 1 is electromagnetically coupled to the resonator 201 of the power transmission device 200 disposed to face the dielectric substrate 4 and receives power from the power transmission device 200. In addition, as an aspect of power transmission by electromagnetic coupling, only electromagnetic induction may be used, but more preferably, magnetic field resonance or electric field resonance is used. From this point of view, it is desirable that the resonator 1 and the resonator 201 of the power transmission device 200 are adjusted so that the resonance frequencies are the same.

  The resonator 1 is typically configured by a conductor pattern formed in a first region of the substrate surface of the dielectric substrate 4. The resonator 1 (and the resonator 201 of the power transmission device 200) is preferably a resonator having a structure in which an open portion 1a is formed in a part of a closed curve line (typically, having a ring shape). And also referred to as an open ring resonator). The open ring resonator is particularly useful in that radiation loss is small and high transmission efficiency can be obtained.

  The resonator 1 and the resonator 201 using an open ring resonator are typically configured by forming a metal wire in a ring shape and bringing both ends close to each other (see FIG. 7). For example, the metal lines of the resonators 1 and 201 are set to have a length that is an odd multiple of 1/2 of the wavelength of the high-frequency power to be transmitted and received so that both ends where the potential difference is maximum are close to each other. The power transmitting side resonator 1 and the power receiving side resonator 201 are disposed to face each other with the center point C0 facing each other in plan view, and the open portion 1a and the center point C0 in the resonator 1 Of the ring between the open end of the resonator 1 and the open end of the resonator 201 (that is, the angle between the open end of the resonator 201 and the open end of the resonator 201) The angle difference in the circumferential direction is, for example, 90 ° or more, and more preferably 180 °. With such a configuration, both the resonance of the magnetic field and the resonance of the electric field are in phase between the resonator 1 and the resonator 201, and the resonance is the strongest (also referred to as phase coupling). Thereby, for example, almost 100% power transmission is possible even at a distance of about ¼ of the wavelength.

  The antenna unit 2 collects the electric power of the electromagnetic wave by resonance with the electromagnetic wave irradiated from the external space (here, the second power transmission device 300). That is, the antenna unit 2 collects the electric power of the electromagnetic wave radiated from the second power transmission device 300 without using electromagnetic induction.

  The antenna unit 2 is typically configured by a conductor pattern formed in the second region of the substrate surface of the dielectric substrate 4. As the antenna unit 2, for example, a patch antenna is used. The conductor pattern constituting the antenna unit 2 is set to, for example, a length that is an integral multiple of ½ of the wavelength of the electromagnetic wave radiated from the second power transmission device 300 and is radiated from the second power transmission device 300. It is configured to resonate with electromagnetic waves.

  The resonator 1 and the antenna unit 2 are set so as to have a resonance frequency in the same frequency band. In other words, in the electronic device 100 according to the present embodiment, the same frequency band is used when receiving power using the antenna power receiving method and when receiving power using the resonator power receiving method. As a result, the rectifier circuit unit 3 in the subsequent stage can be configured to correspond to a specific frequency band, so that either the case of receiving power using the antenna power receiving method or the case of receiving power using the resonator power receiving method However, high power conversion efficiency can be ensured.

  However, the resonator 1 and the antenna unit 2 may be set to have resonance frequencies in different frequency bands. Thereby, even when the antenna unit 2 is not covered with a metal member (described later), it is possible to suppress the power received by the resonator 1 from being radiated from the antenna unit 2.

  The rectifier circuit unit 3 has the resonator 1 and the antenna unit 2 connected in parallel to the input stage, rectifies the high-frequency power collected by either the resonator 1 or the antenna unit 2, and outputs the rectified power to the battery 5 at the subsequent stage. (See FIGS. 4 and 5).

  The rectifier circuit unit 3 is, for example, a voltage doubler rectifier circuit, and includes a plurality of Schottky barrier diodes and the like formed in the third region of the substrate surface of the dielectric substrate 4. In addition, since the method of forming the rectifier circuit unit 3 on the dielectric substrate 4 is the same as a known configuration, description thereof is omitted here (for example, see Patent Document 2).

  For example, a battery 5 is connected to the subsequent stage of the rectifier circuit unit 3, and the battery 5 performs charging with DC power output from the rectifier circuit unit 3.

  Here, a state in which the resonator 1 of the electronic device 100 and the resonator 201 of the first power transmission device 200 are disposed to face each other will be described.

  FIG. 8 is a plan view showing the configuration of the resonator 201 of the first power transmission device 200. FIG. 9 is a plan view showing a state in which the resonator 201 of the first power transmission device 200 and the resonator 1 of the electronic device 100 are arranged to face each other. FIG. 10 is a perspective view illustrating a state in which the resonator 201 of the first power transmission device 200 and the resonator 1 of the electronic device 100 are arranged to face each other.

  The antenna unit 2 according to the present embodiment is covered with a metal member when receiving power using the resonator 1 in order to suppress the power received by the resonator 1 from being radiated from the antenna unit 2. It is the composition which becomes.

  As shown in FIG. 8, the resonator 201 of the first power transmission device 200 is configured by a conductor pattern formed on the substrate surface of the dielectric substrate 202. A second conductor pattern 203 (hereinafter referred to as “metal member 203”) is formed in a region around the resonator 201 of the dielectric substrate 202 so as to cover the antenna unit 2 of the electronic device 100. . 9 and 10, the configuration of the first power transmission device 200 is drawn with a dotted line.

  With this configuration, when the resonator 201 and the resonator 1 are arranged to face each other, the antenna unit 2 of the electronic device 100 is covered with the metal member 203 formed in the first power transmission device 200. Become.

  Note that FIG. 10 illustrates a state where the dielectric substrate 202 of the first power transmission device 200 and the dielectric substrate 4 of the electronic device 100 face each other through the glass substrate.

[Connection structure of antenna and resonator]
Next, a connection structure between the resonator 1 and the antenna unit 2 in the electronic device 100 according to the present embodiment will be described with reference to FIGS. 4 and 11.

  In the electronic device 100 according to the present embodiment, the input stage of the rectifier circuit unit 3 has a connection line extending from the branch point L0 at the end of the connection line L3 directly connected to the rectifier circuit unit 3 to the resonator 1. L1 (hereinafter referred to as “resonator-side connection line L1”) and a connection line L2 extending to the antenna unit 2 (hereinafter referred to as “antenna-side connection line L2”) are branched and connected. In addition, these connection line L1, connection line L2, and connection line L3 are comprised by the microstrip line by which the characteristic impedance was adjusted to 50 (ohm), for example.

  In the electronic device 100 according to the present embodiment, the resonator 1, the antenna unit 2, and the rectifier circuit unit 3 are thus arranged on the same dielectric substrate 4, thereby connecting lines L1, L2, and L3. This realizes a circuit configuration in which impedance mismatching hardly occurs. Further, since there is no wire bonding or the like between the resonator 1 and the rectifier circuit unit 3 or between the antenna unit 2 and the rectifier circuit unit 3, the potentials in the connection lines L1, L2, and L3 are stabilized. It also leads to things. As a result, the RF / DC conversion efficiency of the high-frequency power collected by the resonator 1 or the antenna unit 2 can be improved.

  However, since the resonator 1, the antenna unit 2, and the rectifier circuit unit 3 are connected at the branch point L0, impedance mismatch may occur at the branch point L0. And the said state induces generation | occurrence | production of a return loss.

  In the electronic device 100 according to the present embodiment, in order to avoid the state, power is received using the antenna unit 2 by adjusting the line length t2 of the antenna side connection line L2 and the line length t1 of the resonator side connection line L1. In this case, as if the resonator 1 is not connected, when receiving power using the resonator 1, the antenna unit 2 looks as if it is not connected.

  First, the setting of the line length t1 of the resonator-side connection line L1 will be described while explaining the behavior of the power when receiving power using the antenna unit 2.

  In the electronic device 100 according to the present embodiment, when receiving power using the antenna unit 2, both the resonator 1 and the antenna unit 2 are exposed to air as shown in FIG. And the antenna part 2 resonates with the said electromagnetic wave according to the electromagnetic wave of a predetermined frequency being irradiated from the 2nd power transmission apparatus 300, and collect | recovers the electric power of the said electromagnetic wave. The antenna unit 2 then sends the recovered high frequency power toward the rectifier circuit unit 3.

  The high-frequency power collected by the antenna unit 2 is also diverted from the branch point L0 to the resonator 1 side when going to the rectifying circuit unit 3. At this time, since the other resonator 201 is not disposed in the resonator 1, the high frequency power that has reached the resonator 1 is reflected to the branch point L 0 as it is without being radiated to the external space. That is, since there is no radiation loss in the resonator 1, the amplitude reflectance in the resonator 1 can be regarded as 1 (that is, total reflection). However, the change in phase at the time of reflection changes depending on the characteristics of the resonator 1.

  Here, the phase angle of the high-frequency power reflected by the resonator 1 and returning to the branch point L0 depends on the line length t1 of the resonator-side connection line L1. At this time, if the phase of the high frequency power from the branch point L0 toward the resonator 1 and the phase of the high frequency power reflected from the resonator 1 and toward the branch point L0 are the same phase at the branch point L0, the resonator side connection This is equivalent to the case where the line L1 does not exist. That is, the occurrence of impedance mismatch due to the resonator-side connection line L1 can be suppressed.

  Therefore, the line length t1 of the resonator-side connection line L1 according to the present embodiment includes the phase of the high-frequency power that is received by the antenna unit 2 and travels from the branch point L0 to the resonator 1, and is reflected by the resonator 1 and the branch point. The phase of the high-frequency power returning to L0 is adjusted to be the same phase at the branch point L0 by changing the line length t1.

  To adjust the line length t1 of the resonator side connection line L1, for example, when an input port is arranged on the rectifier circuit unit 3 side, an output port is arranged at the position of the antenna unit 2, and high frequency power is input from the input port A technique for observing a transmitted wave detected at the output port can be used. For example, the above configuration can be realized by adjusting the line length t1 of the resonator-side connection line L1 so that all the high-frequency power input from the input port is transmitted to the output port on the antenna unit 2 side. However, the adjustment of the line length t1 of the resonator-side connection line L1 is not limited to simulation, and may be performed by experiments.

  Next, setting of the line length t2 of the antenna-side connection line L2 will be described while explaining the behavior of the power when receiving power using the resonator 1.

  When receiving power using the resonator 1, the resonator 1 and the resonator 201 of the power transmission device 200 of the power transmission device 200 are arranged to face each other so that the central axes are aligned. At this time, the antenna unit 2 is covered with the second conductor pattern 203 formed on the dielectric substrate 202 of the first power transmission device 200.

  The resonator 1 receives high-frequency power from the power transmission device 200 by electromagnetic coupling with the resonator 201 of the power transmission device 200. Then, the resonator 1 sends the received high-frequency power toward the rectifier circuit unit 3. At this time, the high frequency power directed from the resonator 1 to the rectifier circuit unit 3 is also shunted from the branch point L0 to the antenna unit 2 side.

  On the other hand, as described above, since the shielding metal member (on the second conductor pattern 203) is arranged in the antenna unit 2, radiation of electromagnetic waves from the antenna unit 2 is suppressed, and the antenna unit 2 The reflectance can be regarded as 1 (that is, total reflection).

  Here, the phase angle of the high frequency power reflected by the antenna unit 2 and returning to the branch point L0 depends on the line length t2 of the antenna side connection line L2. At this time, if the phase of the high frequency power directed from the branch point L0 to the antenna unit 2 and the phase of the high frequency power reflected by the antenna unit 2 and directed to the branch point L0 are the same phase at the branch point L0, the antenna side connection line This is equivalent to the case where L2 does not exist. That is, the occurrence of impedance mismatch due to the antenna side connection line L2 can be suppressed.

  Therefore, the line length t2 of the antenna side connection line L2 according to the present embodiment is such that the phase of the high frequency power received by the resonator 1 and traveling from the branch point L0 to the antenna unit 2 is reflected by the antenna unit 2 and the branch point L0. The phase of the high-frequency power that returns to is adjusted to be the same phase at the branch point L0.

  Therefore, for adjusting the line length t2 of the antenna side connection line L2, for example, an input port is arranged on the rectifier circuit unit 3 side, an output port is arranged at the position of the resonator 1, and high frequency power is inputted from the input port. In this case, a technique of observing a transmitted wave detected at the output port can be used. For example, the above configuration can be realized by adjusting the line length t2 of the antenna-side connection line L2 so that all of the high-frequency power input from the input port is transmitted to the output port on the resonator 1 side.

  FIG. 11 is a simulation result in which the transfer characteristics of the electronic device 100 according to the present embodiment are verified. In FIG. 11, the vertical axis represents the reflectance or transmittance, and the horizontal axis represents the frequency of the high frequency power input to the antenna unit 2 or the resonator 1.

  The S1 graph of FIG. 11 shows the reflected wave returning from the resonator 1 or the antenna unit 2 to the rectifying circuit unit 3 when high frequency power is input from the rectifying circuit unit 3 side to the resonator 1 and the antenna unit 2. It is the simulation result which computed the reflectance. Although this antenna unit 2 is used for power reception, since the antenna characteristics have reciprocity in power transmission and reception, the reflectance in power transmission and power reception is the same, and power reception efficiency can be estimated with this characteristic. In addition, this S1 graph is calculated on the conditions where the resonator 201 of the power transmission apparatus 200 is not arrange | positioned. That is, the antenna unit 2 is exposed to air, and the resonator 1 does not have a resonator as a counterpart.

  The S2 graph of FIG. 11 shows the transmittance from the resonator 1 to the resonator 201 when high frequency power is input to the resonator 1 and the antenna unit 2 from the rectifier circuit unit 3 side. The S2 graph is calculated under the condition where the resonator 201 of the power transmission device 200 is disposed facing the resonator 1 and under the condition where the antenna unit 2 is covered with a metal member.

  The S3 graph in FIG. 11 is obtained by calculating the reflectance of the reflected wave returning to the rectifier circuit unit 3 side under the same conditions as the S2 graph.

  From the S1 graph, when there is no metal plate covering the resonator 1 and the antenna unit 2, a large dissipation occurs at the frequency at which the antenna unit 2 resonates (5.8 GHz in the figure). This indicates that the radio wave is dissipated to the outside, and there is no reflection at the branch point L0, so that it functions as a predetermined antenna even in power reception. Further, when a metal plate covering the resonator 1 and the antenna unit 2 is placed outside, the high frequency power transmitted from the rectifier circuit unit 3 side from the S2 graph has a wide frequency so as to reflect the frequency characteristics of the resonator 1. It can be confirmed that the light is transmitted from the resonator 1 to the resonator 201 with a transmittance of nearly 100% over the band. Further, from the S3 graph, it can be confirmed that the high frequency power transmitted from the rectifier circuit unit 3 side is transmitted from the resonator 1 to the resonator 201 without returning to the rectifier circuit unit 3 side.

[effect]
As described above, the electronic device 100 according to the present embodiment is disposed in the dielectric substrate 4 and the first region of the dielectric substrate 4, and is opposed to the dielectric substrate 4 to resonate the power transmission device 200. The resonator 1 that receives the first high-frequency power from the power transmission device 200 and the second of the dielectric substrate 4 are electromagnetically coupled to the resonator 201 of the power transmission device 200 when the device 1 is disposed. The antenna unit 2 that is disposed in the region and receives the second high-frequency power from the electromagnetic wave by resonance with the electromagnetic wave irradiated from the external space, and the resonator 1 and the antenna unit 2 in parallel at the input stage A rectifier circuit unit 3 disposed in a third region of the dielectric substrate 4 so as to be connected and rectifying the first and second high-frequency powers and outputting the rectified power to a battery 5 at a subsequent stage. Yes.

  Therefore, according to the electronic device 100 according to the present embodiment, the resonator power receiving method (for example, quick charging using the resonator 1) and the antenna power receiving method (for example, without performing the switching operation of the connection line to the battery 5). The present invention can be applied to any one of batch charging using the antenna unit 2. Further, by disposing the resonator 1, the antenna unit 2, and the rectifier circuit unit 3 on the same dielectric substrate 4, impedance mismatch in the connection line is suppressed, and RF / DC of the received high frequency power is suppressed. Conversion efficiency can be improved. In addition, using the common rectifier circuit unit 3 contributes to downsizing of the electronic device 100.

  In the electronic device 100 according to the present embodiment, the line length t2 of the antenna side connection line L2 (first connection line) is set so that the resonator 201 of the first power transmission device 200 faces the resonator 1. When the antenna unit 2 side is shielded by a metal plate, the phase of the first high-frequency power (high-frequency power received by the resonator 1) from the branch point L0 toward the antenna unit 2 is reflected by the antenna unit 2 Thus, the phase of the first high-frequency power returning to the branch point L0 is adjusted to be the same phase at the branch point L0. In addition, the line length t1 of the resonator-side connection line L1 (second connection line) is the branch point L0 when the resonator 201 and the antenna unit 2 of the first power transmission device 200 are not shielded by the metal plate. The phase of the second high-frequency power (high-frequency power received by the antenna unit 2) directed from the resonator 1 to the resonator 1 and the phase of the second high-frequency power reflected by the resonator 1 and returning to the branch point L0 are the branch point L0. Are adjusted to have the same phase.

  As a result, when power is received by the resonator 1, the line L2 on the antenna unit 2 side viewed from the branch point L0 can be regarded as a state that does not exist equivalently. Further, when power is received by the antenna unit 2, the line L1 on the side of the resonator 1 viewed from the branch point L0 can be regarded as a state that does not exist equivalently. This makes it possible to avoid power loss due to impedance mismatch at the branch point L0, and achieve high power conversion efficiency for high-frequency power received by either the resonator 1 or the antenna unit 2. Can do.

  In addition, the power transmission device 200 according to the present embodiment includes a metal member 203 that can cover the antenna unit 2 when the resonator 201 is disposed to face the resonator 1. As a result, the power received by the resonator 1 can be suppressed from being radiated from the antenna unit 2.

(Other embodiments)
The present invention is not limited to the above embodiment, and various modifications can be considered.

  In the embodiment described above, an embodiment using an open ring resonator as an example of the resonator 1 has been described. However, as the resonator 1 of the present invention, various resonators can be applied, and a ring resonator or a spiral resonator can also be applied.

  Moreover, in the said embodiment, the aspect which uses a patch antenna as an example of the antenna part 2 was shown. However, various antennas can be applied to the antenna unit 2 of the present invention. For example, a slot antenna or a dipole antenna can also be applied.

  Moreover, in the said embodiment, the aspect which uses the metal member 203 provided in the 1st power transmission apparatus 200 as an example of the metal member for coat | covering the antenna part 2 was shown. However, the metal member for covering the antenna unit 2 may be a movable conductor plate or the like provided in the casing of the electronic device 100.

  In the above embodiment, a voltage doubler type rectifier circuit is used as an example of the rectifier circuit unit 3, but a full-wave rectifier type rectifier circuit or the like may be used. Further, the rectifying circuit unit 3 may be further provided with a smoothing capacitor or a filter unit (for example, an open stub). Further, the rectifier circuit unit 3 may be formed on a semiconductor chip separate from the dielectric substrate 4.

  Moreover, in the said embodiment, the aspect by which the battery 5 which the electronic device 100 mounts was connected to the back | latter stage of the rectifier circuit part 3 was shown. However, the power supply target of the present invention may be a type of electric load other than the battery 5.

  As mentioned above, although the specific example of this invention was demonstrated in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

  The electronic device according to the present disclosure can be applied to both the resonator power reception method and the antenna power reception method when charging the battery.

DESCRIPTION OF SYMBOLS 1 Resonator 2 Antenna part 3 Rectifier circuit part 4 Dielectric board 5 Battery 100 Electronic device 200 1st power transmission apparatus 201 Resonator 202 Dielectric board 203 Metal member 300 2nd power transmission apparatus

Claims (8)

A dielectric substrate;
When the resonator of the power transmission device is disposed in the first region of the dielectric substrate and is opposed to the dielectric substrate, it is electromagnetically coupled to the resonator of the power transmission device, thereby causing the first from the power transmission device to A resonator that receives high-frequency power;
An antenna unit disposed in the second region of the dielectric substrate and receiving a second high-frequency power from the electromagnetic wave by resonance with the electromagnetic wave irradiated from an external space;
The resonator and the antenna unit are connected in parallel to the input stage, and are arranged in a third region of the dielectric substrate to rectify the first and second high-frequency powers and A rectifier circuit that outputs to a load;
Electronic equipment comprising. The line length of the first connection line extending from the branch point branching to the resonator and the antenna unit at the input stage of the rectifier circuit unit is that the antenna unit is shielded by a metal plate. In this case, the phase of the first high-frequency power traveling from the branch point to the antenna unit and the phase of the first high-frequency power reflected by the antenna unit and returning to the branch point are the same at the branch point. Adjusted to be in phase,
The line length of the second connection line extending from the branch point to the resonator is such that the resonance of the power transmission device from the branch point when the resonator of the power transmission device is not disposed facing the resonator. The phase of the second high-frequency power going to the resonator and the phase of the second high-frequency power reflected by the resonator and returning to the branch point are adjusted to be the same phase at the branch point. The electronic device according to claim 1. The connection line connecting the rectifier circuit unit and the resonator, and the connection line connecting the rectifier circuit unit and the antenna unit are formed by a microstrip line or a coplanar line adjusted to have a predetermined characteristic impedance. The electronic device according to claim 1, wherein the electronic device is configured. The said power transmission apparatus is provided with the metal member which coat | covers the said antenna part, when the resonator which self has arrange | positions facing the said resonator of a power receiving side is provided. Electronics. The electronic device according to any one of claims 1 to 4, wherein the resonator and the antenna unit are configured by a conductor pattern formed on a substrate surface of the dielectric substrate. The electronic device according to claim 5, wherein the resonator has a structure in which an open portion is formed in a part of a closed curve line. The electronic apparatus according to claim 5, wherein the antenna unit is a patch antenna. The electronic device according to any one of claims 1 to 7, wherein the electrical load is a battery.

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