JP2020167769A - Power conversion apparatus - Google Patents

Abstract

To provide a power conversion apparatus exhibiting high power conversion efficiency.SOLUTION: A power conversion apparatus comprises a first antenna element having a predetermined resonance frequency, that extends to a first open end from a first terminal; a second antenna element having a predetermined resonance frequency, that extends to a second open end from a second terminal and is coupled with the first antenna element; a rectifying element connected between the first terminal and the second terminal; a first transmission line where a first end part is connected to a current input terminal of the rectifying element; a second transmission line where a second end part is connected to the current input terminal of the rectifying element; and a capacitor inserted between the first transmission line and the second transmission line. A length from the first end part of the first transmission line to a first connection point where the capacitor is connected to the first transmission line, and a length from the second end part of the second transmission line to a second connection point where the capacitor is connected to the second transmission line each are a length corresponding to an electric length of a quarter wavelength at the predetermined resonance frequency.SELECTED DRAWING: Figure 1

Description

The present invention relates to a power converter.

Conventionally, two spiral antenna elements that construct a log spiral antenna, a diode inserted between the terminals on the central side of the two antenna elements in a plan view, and the outer side of the two antenna elements in a plan view. There is a system having two pads connected to each of the two terminals (see, for example, Non-Patent Document 1).

“Tunable continuous-wave terahertz generation / detection with compact 1.55 μm detuned dual-mode laser diode and InGaAs based photomixer”, Namje Kim et. al. , August 2011 / Vol. 19, No. 16 / OPTICS EXPRESS 15403

By the way, in the case of receiving high frequency power and converting it into DC power in the conventional system as described above, since two pads are connected to two terminals on the outside of the two antenna elements, the log spiral antenna The radiation characteristics are adversely affected and the power conversion efficiency is reduced.

Therefore, it is an object of the present invention to provide a power conversion device having high power conversion efficiency.

The power conversion device of the embodiment of the present invention extends from the first terminal to the first open end, extends from the first antenna element having a predetermined resonance frequency, and extends from the second terminal to the second open end. A second antenna element coupled to the first antenna element and having the predetermined resonance frequency, a rectifying element connected between the first terminal and the second terminal, and a rectifying element whose first end is the rectifying element. Between the first transmission line connected to the current input terminal of the above, the second transmission line whose second end is connected to the current output terminal of the rectifying element, and the first transmission line and the second transmission line. The length from the first end of the first transmission line to the first connection point where the capacitor is connected to the first transmission line, including the capacitor inserted in the first transmission line, and the second end of the second transmission line. The length from the portion to the second connection point where the capacitor is connected to the second transmission line is a length corresponding to the electric length of a quarter wavelength at the predetermined resonance frequency.

It is possible to provide a power conversion device having high power conversion efficiency.

It is a figure which shows the power conversion apparatus 100 of an embodiment. It is a figure which shows the circuit structure of the power conversion apparatus 100. It is a figure which shows the circuit structure of the power conversion apparatus 100. It is a figure which shows the power conversion apparatus 100A of the 1st modification of embodiment. It is a figure which shows the electric power conversion apparatus 100B by the 2nd modification of embodiment. It is a figure which shows the circuit structure of the power conversion apparatus 100B. It is a figure which shows the equalization circuit around the diode 120A and 120B. It is a figure which shows the characteristic with respect to the input power of the output voltage Vout obtained by the power conversion device 100 and the power conversion device 100B.

Hereinafter, embodiments to which the power conversion device of the present invention is applied will be described.

<Embodiment>
FIG. 1 is a diagram showing a power conversion device 100 of the embodiment. The power conversion device 100 includes a substrate 101, a spiral antenna 110, a diode 120, transmission lines 130 and 140, and a capacitor 150.

In the following, the XYZ coordinate system will be defined and described. In the following, for convenience of explanation, the negative side of the Z axis is referred to as the lower side or the lower side, and the positive side of the Z axis is referred to as the upper side or the upper side, but does not represent a universal hierarchical relationship. Further, the plane view means an XY plane view.

The power conversion device 100 is a device that converts high-frequency power received by the spiral antenna 110 into DC power and outputs it. The high-frequency power is, for example, the power of a high-frequency signal used in wireless communication or the like, and is a weak high-frequency power.

The substrate 101 may be a substrate made of an insulator, and for example, a FR-4 (Flame Retardant type 4) standard wiring board made of a glass epoxy resin can be used. A spiral antenna 110, a diode 120, a part of transmission lines 130 and 140, and a capacitor 150 are mounted on the upper surface of the substrate 101. Further, other parts of the transmission lines 130 and 140 are mounted on the lower surface of the substrate 101. The upper surface of the substrate 101 is an example of the first surface, and the lower surface is an example of the second surface.

The spiral antenna 110 has two antenna elements 110A and 110B. The antenna elements 110A and 110B extend from the terminals 111A and 111B to the ends 112A and 112B in a spiral shape (spiral shape), respectively.

More specifically, the antenna elements 110A and 110B are spirally wound from the terminals 111A and 111B located inside in a plan view while being arranged in a nested manner, and the more the antenna elements 110A and 110B are wound outward from the terminals 111A and 111B. , The antenna elements 110A and 110B have a wide distance from each other, and the line widths of the antenna elements 110A and 110B are widened. Further, the line widths of the antenna elements 110A and 110B are gradually narrowed on the end portions 112A and 112B sides.

In other words, the antenna elements 110A and 110B are closer to each other toward the inside, and the line width is narrower toward the terminals 111A and 111B. That is, the antenna elements 110A and 110B are rough on the outside and denser toward the inside. The reason for having such a shape is to increase the coupling of the antenna elements 110A and 110B.

The spiral antenna 110 has an impedance as high as about twice the impedance of a so-called dipole antenna (input impedance is 75Ω as an example). The line lengths of the antenna elements 110A and 110B (the lengths from the terminals 111A and 111B to the ends 112A and 112B) are equal to each other, and are 1/2 of the electrical length λe of the wavelength λ at the frequency of the high frequency power received by the spiral antenna 110. It is a length corresponding to (λe / 2). The frequency of the high frequency power is, for example, several hundred megahertz (MHz) or more, and may be on the order of gigahertz (GHz).

The length corresponding to 1/2 (λe / 2) of the electric length λe of the wavelength λ at the frequency of high frequency power is equal to 1/2 (λe / 2) of the electric length λe of the wavelength λ at the frequency of high frequency power. Not limited to this, it is meant to include a length set to be slightly shorter or longer than 1/2 (λe / 2) of the electrical length λe in order to adjust the impedance of the spiral antenna 110.

A diode 120 is connected between the terminals 111A and 111B. Further, the terminals 111A and 111B are connected to the transmission lines 130 and 140, respectively. Since the power conversion device 100 converts weak high-frequency power into DC power, it is required to have a small conversion loss. Since the diode 120 that rectifies high-frequency power is an element having a large impedance, the antenna that receives high-frequency power is required to have an impedance (input impedance) large enough to be balanced with the diode 120. From this point of view, the spiral antenna 110 is used.

The antenna elements 110A and 110B are examples of the first antenna element and the second antenna element, respectively. The terminals 111A and 111B are a pair of feeding points, and are examples of the first terminal and the second terminal, respectively. The ends 112A and 112B are examples of a first open end and a second open end, respectively.

The diode 120 has an anode 121 and a cathode 122, and is inserted between terminals 111A and 111B. The diode 120 is inserted in series between the antenna elements 110A and 110B by connecting the anode 121 to the terminal 111A and the cathode 122 to the terminal 111B.

The diode 120 half-wave rectifies the high-frequency power received by the spiral antenna 110 and outputs it to the transmission lines 130 and 140.

The transmission line 130 has a through hole 130A, a line 130B, a through hole 130C, and a line 130D. The transmission line 130 is an example of the first transmission line.

Through-holes 130A and 130C can be produced, for example, by forming a plating treatment (for example, copper plating treatment) on the inner wall of the through hole formed in the substrate 101. As an example, the lines 130B and 130D can be manufactured by patterning metal foils (for example, copper foils) provided on the upper surface and the lower surface of the substrate 101 by an etching process.

The through hole 130A is a conductor provided on the inner wall of the through hole penetrating the substrate 101 in the thickness direction (Z-axis direction), and is an example of the first through hole conductor. The through hole 130A has an end 131A (upper end) and a lower end. The end 131A of the through hole 130A is connected to the terminal 111A of the antenna element 110A and the anode 121 of the diode 120, and the lower end of the through hole 130A is connected to the end 131B of the line 130B. The through hole 130A is an example of the first through conductor, and the end portion 131A is an example of the first end portion.

The line 130B is provided on the lower surface of the substrate 101 and has ends 131B and 132B. The end 131B is connected to the through hole 130A, and the end 132B is connected to the through hole 130C.

In the power conversion device 100, a diode 120 is provided in the center of the spiral antenna 110 in a plan view, and power is taken out from the terminal 111A located in the center of the spiral antenna 110. Therefore, in order to bypass the transmission line 130, the lower surface of the substrate 101 is used. The line 130B provided in the above is used to draw power to the outside of the spiral antenna 110 in a plan view.

The through hole 130C is a conductor provided on the inner wall of the through hole that penetrates the substrate 101 in the thickness direction (Z-axis direction). The through hole 130C connects the end 132B of the line 130B and the end 131D of the line 130D.

The line 130D is provided on the upper surface of the substrate 101 and has ends 131D and 132D and a connection point 133D. The end portion 131D is an end portion connected to the through hole 130C, and the end portion 132D is an output terminal for outputting DC power to an external device. The connection point 133D is provided between the end 131D and the end 132D, and one terminal of the capacitor 150 is connected to the connection point 133D. The connection point 133D is an example of the first connection point.

In such a transmission line 130, the length from the end 131A of the through hole 130A to the connection point 133D of the line 130D via the line 130B and the through hole 130C is the wavelength λ at the frequency of the high frequency power received by the spiral antenna 110. It is a length corresponding to 1/4 of the electric length λe (electrical length of a quarter wavelength (λe / 4)).

The length corresponding to the electric length (λe / 4) of the quarter wavelength at the frequency of high frequency power is not limited to the length equal to the electric length (λe / 4) of the quarter wavelength at the frequency of high frequency power, and the impedance of the transmission line 130. It means to include a length set to be slightly shorter or longer than the electric length (λe / 4) of a quarter wavelength in order to adjust.

The reason for setting the length from the end 131A of the transmission line 130 to the connection point 133D to a length corresponding to the electric length (λe / 4) of a quarter wavelength will be described later with reference to FIGS. 2 and 3. ..

The transmission line 140 has the same configuration as the transmission line 130, and has a through hole 140A, a line 140B, a through hole 140C, and a line 140D. The transmission line 140 is an example of the second transmission line.

The through hole 140A, the line 140B, the through hole 140C, and the line 140D can be manufactured in the same manner as the through hole 130A, the line 130B, the through hole 130C, and the line 130D, respectively.

The through hole 140A is a conductor provided on the inner wall of the through hole penetrating the substrate 101 in the thickness direction (Z-axis direction), and is an example of the second through hole conductor. The through hole 140 has an end portion 141A (upper end) and a lower end portion. The end 141A of the through hole 140 is connected to the terminal 111B of the antenna element 110B and the cathode 122 of the diode 120, and the lower end of the through hole 140 is connected to the end 141B of the line 140B. The through hole 140A is an example of the second through conductor, and the end portion 141A is an example of the second end portion.

The line 140B is provided on the lower surface of the substrate 101 and has ends 141B and 142B. The end 141B is connected to the through hole 140A and the end 142B is connected to the through hole 140C.

In the power conversion device 100, a diode 120 is provided in the center of the spiral antenna 110 in a plan view, and power is taken out from the terminal 111B located in the center of the spiral antenna 110. Therefore, in order to bypass the transmission line 140, the lower surface of the substrate 101 is used. The line 140B provided in the above is used to draw power to the outside of the spiral antenna 110 in a plan view.

The through hole 140C is a conductor provided on the inner wall of the through hole that penetrates the substrate 101 in the thickness direction (Z-axis direction). The through hole 140C connects the end portion 142B of the line 140B and the end portion 141D of the line 140D.

The line 140D is provided on the upper surface of the substrate 101 and has ends 141D and 142D and a connection point 143D. The end portion 141D is an end portion connected to the through hole 140C, and the end portion 142D is an output terminal for outputting DC power to an external device. The connection point 143D is provided between the end 141D and the end 142D, to which the other terminal of the capacitor 150 is connected. The connection point 143D is an example of the second connection point.

In such a transmission line 140, the length from the end 141A of the through hole 140A to the connection point 143D of the line 140D via the line 140B and the through hole 140C is the wavelength λ at the frequency of the high frequency power received by the spiral antenna 110. It is a length corresponding to 1/4 of the electric length λe (electrical length of a quarter wavelength (λe / 4)). The meaning of the length corresponding to the electric length (λe / 4) of the quarter wavelength in the frequency of high frequency power is the same as that of the transmission line 130.

The reason for setting the length from the end 141A of the transmission line 140 to the connection point 143D to a length corresponding to the electrical length (λe / 4) of a quarter wavelength will be described later with reference to FIGS. 2 and 3. ..

The capacitor 150 is inserted between the connection point 133D of the line 130D and the connection point 143D of the line 140D. That is, one of the pair of electrodes of the capacitor 150 is connected to the connection point 133D and the other is connected to the connection point 143D. The capacitor 150 is provided to receive power by the spiral antenna 110 and store the power converted into DC power by the diode 120 and the transmission lines 130 and 140.

2 and 3 are diagrams showing a circuit configuration of the power conversion device 100. In FIG. 2, the spiral antenna 110 is shown in a simplified manner, and the symbols of the main components are shown. The through holes 130A, 130C, 140A, and 140C are indicated by x. In FIG. 3, transmission lines 130 and 140 are shown in a simplified manner.

Here, the length from the end 131A of the transmission line 130 to the connection point 133D and the length from the end 141A of the transmission line 140 to the connection point 143D correspond to the electric length (λe / 4) of a quarter wavelength. The reason for setting to is explained. Since the reasons for the transmission lines 130 and 140 are the same, the reasons for the transmission line 130 will be described.

In order to half-wave rectify the high-frequency power received by the spiral antenna 110 with the diode 120, the high-frequency power may not be directly transmitted from the spiral antenna 110 to the transmission lines 130 and 140. For this purpose, the transmission lines 130 and 140 may not be visible (not connected) for the high frequency power received by the spiral antenna 110, and the diode 120 may be hidden from the spiral antenna 110 side for the received high frequency power. The power transmission lines 130 and 140 may behave as if the power transmission lines 130 and 140 are open.

Further, in order to convert the electric power half-wave rectified by the diode 120 into DC electric power, it is necessary to store the electric charge by using the capacitor 150. Although the capacitor 150 is provided for smoothing, the half-wave rectified power output from the diode 120 has half the frequency component of the original high-frequency power.

Therefore, in order to efficiently store the electric charge in the capacitor 150, the circuit may be such that the capacitor 150 is short-circuited for the half-wave rectified electric power.

That is, the transmission line 130 may be short-circuited (short-circuited) at the connection point 133D connected to the capacitor 150 and open (open) at the connection point between the through hole 130A and the diode 120 for high-frequency power.

In order to satisfy such a condition, a standing wave may be generated in the transmission line 130 so that the connection point between the through hole 130A and the diode 120 becomes angry and the connection point 133D has a node. The node of the standing wave is the point where the impedance becomes zero because the voltage becomes zero. Further, the antinode of the standing wave is the point where the impedance becomes the maximum value because the voltage becomes the maximum value.

For this reason, the length from the end 131A of the transmission line 130 to the connection point 133D is set to a length corresponding to the electrical length (λe / 4) of a quarter wavelength, and the antinode of the standing wave is set at the end 131A. Is generated, and a node is generated at the connection point 133D. This also applies to the transmission line 140.

In this way, if the length from the ends 131A and 141A of the transmission lines 130 and 140 to the connection points 133D and 143D is set to a length corresponding to the electrical length (λe / 4) of a quarter wavelength, the spiral antenna 110 can be used. Since the connection point between the through hole 130A and the diode 120 is open for the received high frequency power, all the received high frequency power flows to the diode 120. As a result, the received high frequency power is half-wave rectified.

Further, the half-wave rectified power is transmitted through the transmission lines 130 and 140, and the connection points 133D and 143D appear to be short-circuited to the high-frequency components that are half of the original high-frequency power, so that the DC power is taken out by the capacitor 150. .. Therefore, DC power of voltage Vout can be obtained between the ends 132D and 142D.

As described above, the spiral antenna 110 has the ends 112A and 112B open, and the radiation characteristics are good. Further, the spiral antenna 110 having high impedance receives high frequency power, and the diode 120 performs half-wave rectification. Then, by setting the length from the ends 131A and 141A of the transmission lines 130 and 140 to the connection points 133D and 143D to a length corresponding to the electric length (λe / 4) of a quarter wavelength, the capacitor 150 is efficient. DC power can be taken out.

Therefore, it is possible to provide the power conversion device 100 having high power conversion efficiency.

Although the mode in which the spiral antenna 110 is used has been described above, a log spiral antenna (log spiral antenna) may be used instead of the spiral antenna 110. Since the log spiral antenna has a high impedance like the spiral antenna 110, it is suitable for the application of the power conversion device 100.

Further, instead of the spiral antenna 110, for example, an antenna having a high impedance equivalent to that of the spiral antenna 110 may be used by arranging and coupling two antenna elements in the shape of a miander in close proximity to each other.

Further, although the mode in which the diode 120 is provided on the upper surface of the substrate 101 has been described above, the diode 120 is provided on the lower surface of the substrate 101 and is connected between the lower ends of the through holes 130A and 140A. The spiral antenna 110 may be connected to the spiral antenna 110 via through holes 130A and 140A.

Further, although the form in which the substrate 101 is a single layer of insulating layer has been described above, the substrate 101 has a plurality of insulating layers and a metal layer arranged so as to be overlapped with the plurality of insulating layers, and is spiral. The antenna 110 may be provided as a metal layer between layers sandwiched between a plurality of insulating layers. In this case, the transmission lines 130 and 140 may be provided on any metal layer.

Further, in the above, the mode in which the spiral antenna 110, the diode 120, the transmission lines 130 and 140, and the capacitor 150 are provided on the substrate 101 has been described, but these components may be described as, for example, a power conversion device 100 such as an electronic device. May be provided in the housing of another device or the like. In this case, the power conversion device 100 is attached to an electronic device or the like.

Further, although the mode in which the through holes 130A, 130C, 140A and 140C are used has been described above, vias may be used.

Further, it may have a modified configuration as shown in FIG. FIG. 4 is a diagram showing a power conversion device 100A of the first modification of the embodiment. The power conversion device 100A includes a bonding wire 130E instead of the through holes 130A and 130C and the line 130B of the power conversion devices 100 shown in FIGS. 1 to 3, and a bonding wire 140E instead of the through holes 140A and 140C and the line 140B. It is a configuration that includes. That is, the transmission line 130 includes the line 130D and the bonding wire 130E, and the transmission line 140 includes the line 140D and the bonding wire 140E.

One end of the bonding wire 130E is connected to the terminal 111A of the antenna element 110A and the anode 121 of the diode 120, and the other end is connected to the end 131D of the line 130D. Similarly, one end of the bonding wire 140E is connected to the terminal 111B of the antenna element 110B and the cathode 122 of the diode 120, and the other end is connected to the end 141D of the line 140D.

By using such bonding wires 130E and 140E, it is not necessary to mount the line 130B on the lower surface of the substrate 101.

Further, the configuration as shown in FIGS. 5 and 6 may be used. FIG. 5 is a diagram showing a power conversion device 100B according to a second modification of the embodiment. FIG. 6 is a diagram showing a circuit configuration of the power conversion device 100B.

The power converter 100B includes a spiral antenna 110, diodes 120A and 120B, transmission lines 130M and 140M, and a capacitor 150. Here, the substrate 101 (see FIG. 1) is omitted.

The power conversion device 100B has a configuration in which the transmission lines 130 and 140 of the power conversion devices 100 shown in FIGS. 1 to 3 are replaced with transmission lines 130M and 140M, and a diode 120B is added. The diode 120A is the same as the diode 120 shown in FIGS. 1 to 3, but will be described as having an anode 121A and a cathode 122A.

The diodes 120A and 120B are provided on the upper surface of the substrate 101. Since other configurations are the same as those of the power conversion device 100 shown in FIGS. 1 to 3, the same components are designated by the same reference numerals and the description thereof will be omitted. Hereinafter, the differences will be mainly described.

The diode 120B has an anode 121B and a cathode 122B. The anode 121B is connected to the anode 121A of the diode 120A and the terminal 111A of the antenna element 110A. Further, the cathode 122B is connected to the end 131MA of the transmission line 130M. The diodes 120A and 120B are provided for full-wave rectification of the high-frequency power received by the spiral antenna 110.

The transmission line 130M has a through hole 130MA, a line 130MB, a through hole 130MC, and a line 130MD. The length of the transmission line 130M is different from that of the transmission line 130 shown in FIGS. 1 to 4.

The transmission line 130M extends from the end 131MA through the connection point 133MD to the end 132MD. The length from the end 131MA to the connection point 133MD corresponds to 1/2 of the electrical length λe of the wavelength λ at the frequency of the high-frequency power received by the spiral antenna 110 (half-wavelength electrical length (λe / 2)). That's right.

The length corresponding to the half-wavelength electric length (λe / 2) at the high-frequency power frequency is not limited to the length equal to the half-wavelength electric length (λe / 2) at the high-frequency power frequency, and the impedance of the transmission line 130. It means to include a length set to be slightly shorter or longer than the electric length (λe / 2) of a half wavelength in order to adjust.

The transmission line 140M extends from the end 141MA through the connection point 143MD to the end 142MD. The length from the end 141MA to the connection point 143MD corresponds to 1/2 (half-wavelength electrical length (λe / 2)) of the electrical length λe of the wavelength λ at the frequency of the high-frequency power received by the spiral antenna 110. That's right.

The end 141MA is connected to the terminal 111B of the antenna element 110B and the cathode 122A of the diode 120A. Further, the meaning of the length corresponding to 1/2 (half-wavelength electric length (λe / 2)) of the electric length λe of the wavelength λ at the frequency of high frequency power is the same as that of the transmission line 130M.

Here, it will be described with reference to FIG. 7 in addition to FIGS. 5 and 6. FIG. 7 is a diagram showing an equalization circuit around the diodes 120A and 120B.

The power conversion device 100B uses the virtual line 135 shown by the broken line in FIG. 7 in order to perform full-wave rectification of the high-frequency power received by the spiral antenna 110 by the diodes 120A and 120B.

In order to realize such a virtual line 135, the cathode 122A of the diode 120A and the anode 121B of the diode 120B may be short-circuited. In order to short-circuit the cathode 122A and the anode 121B, a full-wave rectified high-frequency component transmitted through the transmission lines 130M and 140M is applied to the end 131MA of the transmission line 130M and the end 141MA of the transmission line 140M. The antinode of the standing wave of the power to have may be generated. Further, the antinode of the standing wave may be generated at the connection points 133D and 143D.

For this reason, the length from the end 131MA of the transmission line 130M to the connection point 133D and the length from the end 141MA of the transmission line 140M to the connection point 143D are defined in the wavelength of the high frequency power received by the spiral antenna 110. The length is set to correspond to 1/2 of the electric length λe of the wavelength λ (half-wavelength electric length (λe / 2)).

Of the high-frequency power received by the spiral antenna 110, the power input from the terminal 111A to the diodes 120A and 120B is half-wave rectified by the diode 120A. Of the high-frequency power received by the spiral antenna 110, the power input from the terminal 111B to the diodes 120A and 120B is half-wave rectified by the diode 120B via the virtual line 135. Since the phases of the power half-wave rectified by the diodes 120A and 120B differ by 90 degrees, full-wave rectified power can be obtained on the transmission lines 130M and 140M.

Although FIGS. 5 and 6 show a form in which the diodes 120A and 120B are provided on the upper surface of the substrate 101, the diodes 120A and 120B may be provided on the lower surface of the substrate 101. In this case, the transmission lines 130M and 140M do not include the through holes 130MA and 140MA, and spiral the lengths from the ends 131MB and 141MB of the lines 130MB and 140MB to the ends 132MD and 142MD of the lines 130MD and 140MD. It may be set to a length corresponding to 1/2 (half-wavelength electric length (λe / 2)) of the electric length λe of the wavelength λ at the frequency of the high frequency power received by the antenna 110.

FIG. 8 is a diagram showing the characteristics of the output voltage Vout obtained by the power conversion device 100 and the power conversion device 100B with respect to the input power. The characteristics shown in FIG. 8 are obtained by electromagnetic field simulation. In FIG. 8, the characteristics of the power conversion device 100 are indicated by triangular markers, and the characteristics of the power conversion device 100B are indicated by square markers.

As shown in FIG. 8, the output voltage Vout of the power conversion device 100B is substantially doubled with respect to the output voltage Vout of the power conversion device 100. This represents the difference between the power converter 100 that obtains DC power by half-wave rectification and the power converter 100B that obtains DC power by full-wave rectification.

As described above, according to the second modification of the embodiment, the lengths from the diodes 120A and 120B and the ends 131MA and 141MA to the connection points 133D and 143D are the electric lengths (λe) of half wavelengths at the frequency of high frequency power. High power conversion efficiency can be realized by using transmission lines 130M and 140M having a length corresponding to / 2).

Therefore, it is possible to provide the power conversion device 100B having high power conversion efficiency.

Although the power conversion device according to the exemplary embodiment of the present invention has been described above, the present invention is not limited to the specifically disclosed embodiments and does not deviate from the scope of claims. , Various modifications and changes are possible.
The following additional notes will be further disclosed with respect to the above embodiments.
(Appendix 1)
A first antenna element extending from the first terminal to the first open end and having a predetermined resonance frequency,
A second antenna element extending from the second terminal to the second open end, coupled with the first antenna element, and having the predetermined resonance frequency,
A rectifying element connected between the first terminal and the second terminal,
A first transmission line whose first end is connected to the current input terminal of the rectifying element, and
A second transmission line whose second end is connected to the current output terminal of the rectifying element, and
Includes a capacitor inserted between the first transmission line and the second transmission line.
The length from the first end of the first transmission line to the first connection point where the capacitor is connected to the first transmission line, and the second transmission of the capacitor from the second end of the second transmission line. The length to the second connection point connected to the line is a length corresponding to the electric length of a quarter wavelength at the predetermined resonance frequency, which is a power conversion device.
(Appendix 2)
The first antenna element and the substrate on which the second antenna element is provided on the first surface are further included.
The rectifying element is provided on the first surface.
The first transmission line is connected to the current input terminal and is connected to a first through conductor penetrating the substrate and a second through conductor provided on the second surface opposite to the first surface. It has a first antenna element and a first line extending in a section overlapping the second antenna element in a plan view.
The second transmission line is connected to the current output terminal and is connected to a second penetrating conductor that penetrates the substrate and the second penetrating conductor that is provided on the second surface and is connected to the second penetrating conductor. The power conversion device according to Appendix 1, further comprising an element and a second line extending in a section overlapping the second antenna element.
(Appendix 3)
A substrate on which the first antenna element and the second antenna element are provided on the first surface,
A first through conductor connected to the first terminal and penetrating the substrate,
Further including a second through conductor connected to the second terminal and penetrating the substrate.
The rectifying element is provided on the second surface opposite to the first surface, the current input terminal is connected to the first through conductor, and the current output terminal is connected to the second through conductor.
The first transmission line is provided on the second surface, the first end portion is connected to the current input terminal via the first through conductor, and the first antenna element and the second antenna are viewed in a plan view. It has a first line that extends in the section that overlaps the element,
The second transmission line is provided on the second surface, the second end portion is connected to the current output terminal via the second through conductor, and the first antenna element and the second antenna are viewed in a plan view. The power conversion device according to Appendix 1, which has a second line extending in a section overlapping the element.
(Appendix 4)
A first antenna element extending from the first terminal to the first open end and having a predetermined resonance frequency,
A second antenna element extending from the second terminal to the second open end, coupled with the first antenna element, and having the predetermined resonance frequency,
A first rectifying element connected between the first terminal and the second terminal,
A second rectifying element having a first current input terminal of the first rectifying element and a second current output terminal connected to the first terminal,
A first transmission line whose first end is connected to the second current input terminal of the second rectifying element, and
A second transmission line whose second end is connected to the first current output terminal of the first rectifying element, and
Includes a capacitor inserted between the first transmission line and the second transmission line.
The length from the first end of the first transmission line to the first connection point where the capacitor is connected to the first transmission line, and the second transmission of the capacitor from the second end of the second transmission line. The length to the second connection point connected to the line is a length corresponding to the electric length of a half wavelength at the predetermined resonance frequency, which is a power conversion device.
(Appendix 5)
The first antenna element and the substrate on which the second antenna element is provided on the first surface are further included.
The first rectifying element and the second rectifying element are provided on the first surface.
The first transmission line is connected to a second current input terminal of the second rectifying element, and is provided on a first through conductor penetrating the substrate and a second surface opposite to the first surface. It has a first line that is connected to one through conductor and extends in a section that overlaps the first antenna element and the second antenna element in a plan view.
The second transmission line is connected to the first current output terminal of the first rectifying element, and is connected to a second penetrating conductor that penetrates the substrate and a second penetrating conductor provided on the second surface and connected to the second penetrating conductor. The power conversion device according to Appendix 4, further comprising a first antenna element and a second line extending in a section overlapping the second antenna element in a plan view.
(Appendix 6)
A substrate on which the first antenna element and the second antenna element are provided on the first surface,
A first through conductor connected to the first terminal and penetrating the substrate,
Further including a second through conductor connected to the second terminal and penetrating the substrate.
The first rectifying element and the second rectifying element are provided on the second surface opposite to the first surface, and the first current input terminal of the first rectifying element and the second current output of the second rectifying element. The terminal is connected to the first terminal via the first through conductor, and the first current output terminal of the first rectifying element is connected to the second terminal via the second through conductor.
The first transmission line is provided on the second surface, the first end portion is connected to the first through conductor, and extends in a section overlapping the first antenna element and the second antenna element in a plan view. Has a first line to
The second transmission line is provided on the second surface, the first end portion is connected to the second through conductor, and extends in a section overlapping the first antenna element and the second antenna element in a plan view. The power conversion device according to Appendix 4, which has a second line.
(Appendix 7)
The first antenna element is spirally wound from the first terminal located inside in a plan view to the first open end.
The second antenna element is spirally wound from the second terminal located inside in a plan view to the second open end, and is coupled to the first antenna element. The power conversion device according to one item.
(Appendix 8)
The power conversion device according to any one of Appendix 1 to 7, wherein the first antenna element and the second antenna element form a spiral antenna or a logarithmic spiral antenna.

100, 100A, 100B Power converter 101 Board 110 Spiral antenna 110A, 110B Antenna element 120, 120A, 120B Diode 130, 140, 130M, 140M Transmission line 130A, 130C Through hole 130B, 130D line 130E, 140E Bonding wire 131A, 131MA , 141A, 141MA Ends 133D, 143D Connection points 150 Capacitors

Claims (8)

A first antenna element extending from the first terminal to the first open end and having a predetermined resonance frequency,
A second antenna element extending from the second terminal to the second open end, coupled with the first antenna element, and having the predetermined resonance frequency,
A rectifying element connected between the first terminal and the second terminal,
A first transmission line whose first end is connected to the current input terminal of the rectifying element, and
A second transmission line whose second end is connected to the current output terminal of the rectifying element, and
Includes a capacitor inserted between the first transmission line and the second transmission line.
The length from the first end of the first transmission line to the first connection point where the capacitor is connected to the first transmission line, and the second transmission of the capacitor from the second end of the second transmission line. The length to the second connection point connected to the line is a length corresponding to the electric length of a quarter wavelength at the predetermined resonance frequency, which is a power conversion device. The first antenna element and the substrate on which the second antenna element is provided on the first surface are further included.
The rectifying element is provided on the first surface.
The first transmission line is connected to the current input terminal and is connected to a first through conductor penetrating the substrate and a second through conductor provided on the second surface opposite to the first surface. It has a first antenna element and a first line extending in a section overlapping the second antenna element in a plan view.
The second transmission line is connected to the current output terminal and is connected to a second penetrating conductor that penetrates the substrate and the second penetrating conductor that is provided on the second surface and is connected to the second penetrating conductor. The power conversion device according to claim 1, further comprising an element and a second line extending in a section overlapping the second antenna element. A substrate on which the first antenna element and the second antenna element are provided on the first surface,
A first through conductor connected to the first terminal and penetrating the substrate,
Further including a second through conductor connected to the second terminal and penetrating the substrate.
The rectifying element is provided on the second surface opposite to the first surface, the current input terminal is connected to the first through conductor, and the current output terminal is connected to the second through conductor.
The first transmission line is provided on the second surface, the first end portion is connected to the current input terminal via the first through conductor, and the first antenna element and the second antenna are viewed in a plan view. It has a first line that extends in the section that overlaps the element,
The second transmission line is provided on the second surface, the second end portion is connected to the current output terminal via the second through conductor, and the first antenna element and the second antenna are viewed in a plan view. The power conversion device according to claim 1, further comprising a second line extending in a section overlapping the element. A first antenna element extending from the first terminal to the first open end and having a predetermined resonance frequency,
A second antenna element extending from the second terminal to the second open end, coupled with the first antenna element, and having the predetermined resonance frequency,
A first rectifying element connected between the first terminal and the second terminal,
A second rectifying element having a first current input terminal of the first rectifying element and a second current output terminal connected to the first terminal,
A first transmission line whose first end is connected to the second current input terminal of the second rectifying element, and
A second transmission line whose second end is connected to the first current output terminal of the first rectifying element, and
Includes a capacitor inserted between the first transmission line and the second transmission line.
The length from the first end of the first transmission line to the first connection point where the capacitor is connected to the first transmission line, and the second transmission of the capacitor from the second end of the second transmission line. The length to the second connection point connected to the line is a length corresponding to the electric length of a half wavelength at the predetermined resonance frequency, which is a power conversion device. The first antenna element and the substrate on which the second antenna element is provided on the first surface are further included.
The first rectifying element and the second rectifying element are provided on the first surface.
The first transmission line is connected to a second current input terminal of the second rectifying element, is connected to a first penetrating conductor that penetrates the substrate, and is provided on the second surface and is connected to the first penetrating conductor. It has a first antenna element and a first line extending in a section overlapping the second antenna element in a plan view.
The second transmission line is connected to the first current output terminal of the first rectifying element, and is connected to a second penetrating conductor that penetrates the substrate and a second penetrating conductor that is provided on the second surface and is connected to the second penetrating conductor. The power conversion device according to claim 4, further comprising a first antenna element and a second line extending in a section overlapping the second antenna element in a plan view. A substrate on which the first antenna element and the second antenna element are provided on the first surface,
A first through conductor connected to the first terminal and penetrating the substrate,
Further including a second through conductor connected to the second terminal and penetrating the substrate.
The first rectifying element and the second rectifying element are provided on the second surface opposite to the first surface, and the first current input terminal of the first rectifying element and the second current output of the second rectifying element. The terminal is connected to the first terminal via the first through conductor, and the first current output terminal of the first rectifying element is connected to the second terminal via the second through conductor.
The first transmission line is provided on the second surface, the first end portion is connected to the first through conductor, and extends in a section overlapping the first antenna element and the second antenna element in a plan view. Has a first line to
The second transmission line is provided on the second surface, the first end portion is connected to the second through conductor, and extends in a section overlapping the first antenna element and the second antenna element in a plan view. The power conversion device according to claim 4, further comprising a second line. The first antenna element is spirally wound from the first terminal located inside in a plan view to the first open end.
Any of claims 1 to 6, wherein the second antenna element is spirally wound from the second terminal located inside in a plan view to the second open end and coupled with the first antenna element. The power conversion device according to the first paragraph. The power conversion device according to any one of claims 1 to 7, wherein the first antenna element and the second antenna element form a spiral antenna or a logarithmic spiral antenna.

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