JP4445955B2 - Radio wave generator - Google Patents

Radio wave generator Download PDF

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JP4445955B2
JP4445955B2 JP2006330863A JP2006330863A JP4445955B2 JP 4445955 B2 JP4445955 B2 JP 4445955B2 JP 2006330863 A JP2006330863 A JP 2006330863A JP 2006330863 A JP2006330863 A JP 2006330863A JP 4445955 B2 JP4445955 B2 JP 4445955B2
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charge
antenna
connected
radio wave
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JP2008148414A (en
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一浩 佐田
幸二 江藤
和宣 津野
真一 谷村
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Okiセミコンダクタ宮崎株式会社
Okiセミコンダクタ株式会社
国立大学法人 宮崎大学
株式会社エイブル
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Description

  The present invention relates to a radio wave power generation apparatus that generates and stores electric power using radio waves (for example, radio waves of a mobile phone, television broadcasts, radio broadcasts, etc.) existing in a living space.

  Conventionally, as a technique related to a radio wave power generation apparatus that generates and stores electric power using radio waves, for example, there are those described in the following documents.

JP-A-2005-354888 Japanese translation of PCT publication No. 2003-510871 JP-T-2006-505973

  Patent Document 1 describes a technology of a radio wave generator. This radio power generator rectifies a signal from an antenna or coil that receives commercial radio waves (for example, radio waves of a mobile phone existing in a living space, radio waves of television broadcasting, radio broadcasting, etc.) A rectifier circuit (for example, a Schottky barrier diode) created on a silicon substrate and a storage circuit (for example, a capacitor) for storing the output of the rectifier circuit. In this type of radio wave generator, commercial radio waves are received by an antenna or a coil, and after this received signal is rectified by a rectifier circuit, electric charges are accumulated in a storage circuit. It is possible to drive the load using this accumulated charge.

  Patent Document 2 describes a technique of a multilevel antenna formed by a set of geometric elements (polygon, polyhedron).

  Further, Patent Document 3 describes a technique of a fractus antenna including a conductive pattern formed on a semiconductor substrate. The conductive pattern comprises a curve having at least five sections (ie, segments).

  However, in the conventional radio wave generator described in Patent Document 1, about half of the energy of the radio wave received by the antenna or coil is lost due to the internal resistance of the antenna or coil and the internal resistance of the rectifier circuit. In addition, since the storage capacity of the storage circuit is small, for example, it has been impossible to generate power for driving a load composed of a plurality of integrated circuits (hereinafter referred to as “ICs”).

  In view of this, it is conceivable to increase the amount of radio wave reception energy by using a multi-level antenna disclosed in Patent Document 2 suitable for circuit integration or a fractus antenna disclosed in Patent Document 3 instead of an antenna or a coil. However, the loss of received energy due to the internal resistance of the rectifier circuit connected to the output side of the multilevel antenna, fractus antenna, etc. is large, and the size of the storage circuit is larger than necessary to reduce the size of the radio power generator. Therefore, it is difficult to efficiently increase the power supply power without increasing the size of the radio power generator because the storage capacity is small.

The radio wave power generation device of the present invention includes an antenna unit in which a plurality of antennas made of a conductive pattern are disposed on a first substrate, a power generation module unit, and a power storage unit. Here, the power generation module unit includes a plurality of series circuits in which a plurality of power generation module circuits that take in and store charges from the output signal of the antenna and are cascade-connected, and the plurality of series circuits are arranged on the second substrate. The first output node and the second output node are connected in parallel. Further, the power storage unit accumulates electric charge between the first output node and the second output node and outputs the accumulated electric charge from an output terminal.
Each power generation module circuit is connected between a common terminal, a first charge extraction terminal, a second charge extraction terminal, the common terminal and the first charge extraction terminal, and an output signal of the antenna An amplifying element that amplifies the output signal, and a charge accumulating element that is connected between the first charge extracting terminal and the second charge extracting terminal and accumulates the charge of the output signal amplified by the amplifying element. ing.
In another radio power generator according to the present invention, each of the power generation module circuits includes a charge pump circuit that takes in and accumulates charges from the output signal of the antenna. Further, the charge pump circuit includes a first input terminal that inputs an output signal on the positive polarity side of the antenna, a second input terminal that inputs an output signal on the negative polarity side of the antenna, and the accumulated A first charge extraction terminal for extracting a positive charge, a second charge extraction terminal for extracting the accumulated negative charge, and a series connection between the first and second charge extraction terminals. Between the plurality of backflow prevention elements, the plurality of first charge storage elements connected between the odd-numbered places between the plurality of backflow prevention elements and the first input terminal, and the plurality of backflow prevention elements And a plurality of second charge storage elements connected between the even-numbered locations and the second input terminal.

  According to the radio power generation device of the present invention, the amount of radio wave reception energy can be increased by the antenna unit having a plurality of antennas, and the power generation module unit can be separated from the antenna unit and the power storage unit to achieve high integration. Therefore, the received reception energy can be efficiently amplified and stored in the power storage unit. Thereby, power supply power can be increased efficiently without increasing the size of the radio wave generator.

  The radio wave generator includes an antenna unit in which a plurality of antennas each having a conductive pattern are disposed on a first substrate, a power generation module unit, and a power storage unit. The power generation module unit includes a plurality of series circuits in which a plurality of power generation module circuits that capture and store charges from the output signal of the antenna are cascade-connected, and the plurality of series circuits are arranged on a second substrate. The output node and the second output node are connected in parallel. Further, the power storage unit accumulates electric charge between the first output node and the second output node and outputs the accumulated electric charge from an output terminal.

  The power generation module circuit includes, for example, a charge pump circuit that takes in and accumulates charges from the output signal of the antenna. The charge pump circuit is, for example, a complementary MOS transistor (hereinafter referred to as “CMOS”) composed of a P-channel MOS transistor (hereinafter referred to as “PMOS”) and an N-channel MOS transistor (hereinafter referred to as “NMOS”). Can be manufactured by a manufacturing technique (hereinafter referred to as “CMOS process”).

(Circuit configuration)
FIG. 1 is a schematic configuration diagram of a radio wave power generator showing Embodiment 1 of the present invention.
The radio wave generator includes an antenna unit 10 formed on a first substrate (not shown) (for example, a semiconductor substrate such as a silicon substrate) and a second substrate (for example, a semiconductor substrate such as a silicon substrate) not shown. The power generation module unit 20 is formed and connected to the output side of the antenna unit 10, and the power storage unit 40 is connected to the output side of the power generation module unit 20.

  The antenna unit 10 has a plurality of antennas 12 (= 12-11 to 12-1n,..., 12-m1 to 12-mn) for receiving radio waves, which are arranged on a semiconductor substrate (not shown). It is installed.

  The power generation module unit 20 efficiently amplifies the reception energy of the radio wave received by the antenna unit 10 and accumulates it in the power storage unit 40, and includes a plurality of series circuits (for example, a series module) for configuring a voltage addition network. ) 30 (= 30-1 to 30-m), which are provided on the semiconductor substrate (not shown), the first output node (for example, positive output node) N1 and the second output node (for example, negative polarity) Side output node) N2. Each series module 30 is constituted by a plurality of cascaded power generation module circuits 31 (= 31-11 to 311-1n,..., 31-m1 to 31-mn).

  The power storage unit 40 inputs and accumulates charges between the positive polarity side output node N1 and the negative polarity side output node N2 from the positive polarity side input terminal 42 and the negative polarity side input terminal 43, and the positive polarity side output terminal 46 and the negative polarity side output terminal 47.

FIG. 2 is a detailed configuration diagram embodying the radio power generator of FIG.
In this radio wave generator, each antenna 12 is composed of a high-performance planar antenna (for example, a fractus antenna described in Patent Document 3) that is small in size and suitable for integration, and has high reception sensitivity. The antenna 12 includes a conductive pattern 13 that receives radio waves and an output terminal 14. The conductive pattern 13 includes a curve having at least five sections (i.e., segments) as described in Patent Document 3, and at least three of the segments have one of the longest free space operating wavelengths of the antenna. Shorter than / 10, each of the five segments forms a pair of angles with each adjacent segment in the curve, and the smaller of each of the four pairs of angles between the segments is less than 180 ° Yes, at least two angles are less than 115 °, at least two angles are not equal, the curve fits within a rectangular area, and the longest edge of this area is more than 1/5 of the longest free space operating wavelength of the antenna It is getting shorter.

  Each power generation module circuit 31 is connected to the output terminal 14 of each antenna 12 and receives an input terminal 32 for inputting the output signal of each antenna 12, and an amplifying element (for example, each of the amplifying elements 31). An amplification MOS transistor whose gate electrode is controlled by the output signal of the antenna 12) 33, a charge storage element (for example, a capacitor) 34 connected in series to the source electrode of the MOS transistor 33, and the drain of the MOS transistor 33 A common terminal 35 connected to the electrode, a first charge extraction terminal (for example, positive-side charge extraction terminal) 36 connected to the source electrode of the MOS transistor 33 and one electrode of the capacitor 34, and the other of the capacitor 34 A second charge extraction terminal connected to the electrode of the negative electrode (for example, a negative charge extraction terminal) ) 37 is composed of a.

  Each series module 30 includes a bias circuit for each MOS transistor 33 (for example, capacitors 38-1, 39-1 to 38-m, which are connected in series between the positive output node N1 and the negative output node N2). 39-m) are connected to each other.

  In each series module 30, the common terminal 35 of each first-stage power generation module circuit 31 is connected to the positive polarity side output node N1. The positive-side charge extraction terminals 36 of the respective first-stage power generation module circuits 31 are connected to the positive-side output node N1 via the capacitors 38-1 to 38-m, respectively, and the capacitors 39-1 to 39-1 are connected. It is connected to the negative polarity side output node N2 via 39-m, and further connected to the common terminal 35 of each of the second to n-th power generation module circuits 31. The negative-side charge extraction terminal 37 of each first-stage power generation module circuit 31 is connected to the positive-polarity-side charge extraction terminal 36 of each second-stage power generation module circuit 31. Are connected to the positive charge extraction terminal 36 of the power generation module circuit 31 in each third stage. In the same manner, the power generation module circuits 31 in the nth stage are connected in cascade.

  The power storage unit 40 inputs and accumulates charges between the positive polarity side output node N1 and the negative polarity side output node N2 from the positive polarity side input terminal 42 and the negative polarity side input terminal 43, and the positive polarity side output terminal 46 and the negative polarity side output terminal 47, and a second backflow prevention element (for example, a forward diode 44) connected in series between the input terminals 42 and 43 and a charge storage means (for example, Electric double layer capacitor) 45. The negative polarity side output terminal 47 is connected to the ground GND.

  The electric double layer capacitor 45 is a capacitor that uses the electric double layer generated at the interface between the activated carbon and the electrolyte as an operating principle. In other words, when activated carbon is used as a solid and an electrolytic solution is used as a liquid and brought into contact with each other, a positive electrode and a negative electrode are relatively distributed at an extremely short distance at this interface (this phenomenon is referred to as “electricity”). Is called a “double layer”). Therefore, when an electric field is applied from the outside, an electric double layer is formed in the vicinity of the surface of the activated carbon in the electrolytic solution, thereby accumulating charges. In such an electric double layer capacitor 45, there is no dielectric material of an intrinsic material used in a conventional capacitor, and since a chemical reaction is not used for charging / discharging like a battery, the following characteristics are provided. have.

  Since the activated carbon having a large surface area is used and the distance between the dielectrics is extremely short, the capacitance can be obtained in a small size and in units of Farad (F). No special charging circuit or discharge restrictions are required. Even if overcharging and overdischarging are performed, it does not affect the service life like batteries. Furthermore, since it can be soldered as an electronic component, it is easy to mount.

(Mounting structure)
FIG. 3 is a schematic cross-sectional view showing an example of a mounting structure of the radio power generator of FIG.
In the radio power generator shown in FIG. 2 of the first embodiment, the power generation module unit increases the amount of radio waves taken into the power generation module unit 20, efficiently amplifies the voltage of the radio waves taken in, and accumulates the amplified charges. It is desirable that the antenna unit 10 and the power storage unit 40 be separated from the power generation unit 20 to increase the integration of the power generation module unit 20 and increase the voltage amplification factor in the power generation module unit 20.

  3, the antenna unit 10 in FIG. 2 is divided into two antenna units 10-1 and 10-2, and each of these antenna units 10-1 and 10-2 is, for example, a ball grid array. (Ball Grid Array) package (hereinafter referred to as “BGA package”) structure. In each of the antenna portions 10-1 and 10-2 of this BGA package structure, a plurality of antennas 12-11 to 12-1n,..., 12-m1 to 12-mn are divided into two, and two semiconductor substrates (not shown) These two semiconductor substrates are formed on the BGA packages 11-1 and 11-2, respectively. A plurality of solder balls 11-1a and 11-2a for external terminals protrude from the bottom surfaces of the BGA packages 11-1 and 11-2, respectively.

  In the power generation module unit 20, a plurality of series modules 30-1 to 30-m are formed on the semiconductor substrate 21 and sealed with a resin or the like. The antenna unit 10-2 is fixed on the printed circuit board 50, and the antenna unit 10-1 is stacked and fixed on the antenna unit 10-2 via the power generation module unit 20. Further, the power storage unit 40 is fixed on the printed circuit board 50.

The antenna units 10-1 and 10-2 and the power generation module unit 20 are electrically connected via solder balls 11-1a and 11-2a. Furthermore, the antenna unit 10-2 and the power storage unit 40 are electrically connected by a wiring pattern on the printed circuit board 50.
In such a mounting structure, since the antenna units 10-1 and 10-2 are arranged above and below the power generation module 20, it becomes possible to capture radio waves more efficiently. However, the antenna unit 10 in FIG. 2 is formed on one semiconductor substrate (not shown) without being divided into two parts and sealed with resin or the like, and is laminated on the power generation module unit 20 and fixed on the printed circuit board 50. Or you may make it the mounting structure fixed to the printed circuit board 50 with the electric power generation module part 20 without laminating | stacking.

(Operation)
FIG. 4 is a waveform diagram illustrating a charging operation from the power generation module unit 20 to the power storage unit 40 in FIGS. 2 and 3, in which the horizontal axis represents usage time and the vertical axis represents voltage.

  FIG. 4 shows a power consumption curve 51 at the time of existing charging, a curve 52 indicating the charging and consumption state from the power generation module unit 20 to the power storage unit 40, and a threshold voltage level 53 for starting charging.

  In the radio power generator according to the first embodiment, radio waves existing in the living space (for example, radio waves having a frequency of 800 MHz to 2.0 GHz for mobile phones, radio waves having a frequency of 800 MHz for television broadcasting, radio broadcasting, etc.) It is received by the antenna unit 10 (10-1, 10-2). The received voltage is amplified by the MOS transistor 33 in each power generation module circuit 31 (= 31-11 to 31-mn) in the power generation module unit 20, and the capacitor 34 is charged by the amplified voltage. At this time, the energy of the received radio wave is accumulated in the capacitor 34 without being attenuated. The electric charge accumulated in the capacitor 34 is added in each series module 30 (= 30-1 to 30-m), and accumulated in the electric double layer capacitor 45 through the output nodes N1 and N2 and the diode 44 in the accumulation unit 40. Is done. Thus, predetermined power supply power (for example, an output voltage of about 1.5 V and an output current of about 0.1 mA to 1 mA) is output from the output terminals 46 and 47 and supplied to the load circuit.

  At time t1 in FIG. 4, the voltage at the time of existing charging (curve 51) starts to drop, and when the threshold voltage level 53 is reached at time t2, charging from the power generation module unit 20 to the storage unit 40 is started (curve). 52). When the output voltage of the output terminals 46 and 47 reaches the specified voltage at time t3, the output voltage is held at a constant value by the action of the electric double layer capacitor 45. When the load circuit operates and driving power is consumed at time t4, the output voltage (curve 51) starts to drop. When the threshold voltage level 53 is reached at time t5, the power generation module unit 20 transfers to the storage unit 40. Charging starts. When the output voltage of the output terminals 46 and 47 reaches the specified voltage at time t6, the output voltage is held at a constant value by the action of the electric double layer capacitor 45. Thereafter, the same charge / discharge operation is repeated.

(effect)
According to the radio wave generator of the first embodiment, the following effects (a) and (b) are obtained.

  (A) The antenna unit 10 (10-1, 10-2) having a plurality of antennas 12 (= 12-11 to 12-mn) can increase the amount of radio wave reception energy, and the power generation module unit 20 is an antenna. Since the voltage addition network is configured to be highly integrated by being separated from the unit 10 (10-1, 10-2) and the power storage unit 40, the received power can be efficiently amplified to store the power storage unit 40. Can accumulate. Thereby, the power supply power can be increased efficiently without increasing the size of the radio wave generator, and can be applied to various applications.

  (B) All kinds of radio waves are flying in the natural world. Among them, in places where the population density is high, for example, if it is configured to be able to receive radio waves in the 800 MHz to 2.0 GHz band of mobile phones, efficient power generation Is possible. In particular, the frequency band of mobile phones includes PHS (Personal Handyphone System), satellite broadcast waves, wireless LAN (Local Area Network) radio waves, Bluetooth radio waves, and the like, and antenna 12 (= 12-11 to 12-mn) is also included. Can be downsized. However, in places where the population density is low, it is necessary to catch a long frequency band such as a television broadcast wave, a radio broadcast wave, etc., so that the power generation efficiency is lowered and the antenna 12 (= 12-11 to 12-mn) is also used. become longer. As a countermeasure, for example, in the radio wave generator of FIG. 3, one of the two antenna units 10-1 and 10-2 can be used by switching to a short frequency band and using the other for a long frequency band. This is convenient and convenient to use.

(Circuit configuration)
FIG. 5 shows a second embodiment of the present invention, and is a detailed configuration diagram showing another embodiment of the radio power generator of FIG.

  In this radio wave generator, each antenna 12 is constituted by a planar antenna (for example, a loop antenna) that is small and suitable for integration. The antenna 12 includes a looped conductive pattern 13 that receives radio waves, a positive output terminal 16 connected to one end of the conductive pattern, and a negative output terminal 17 connected to the other end of the conductive pattern. It is comprised by.

  In the plurality of series modules 30 (= 30-1 to 30-m) constituting the power generation module unit 20, each series module 30 includes a plurality of cascaded power generation module circuits 31 (= 31-11 to 31). −1n,..., 31-m1 to 31-mn). Each power generation module circuit 31 is configured by a charge pump circuit that takes in and accumulates electric charge from the output signal of each antenna 12, and a first input terminal (for example, positive electrode) connected to the positive output terminal 16 of the antenna 12. Negative side input terminal) 61, a second input terminal (for example, negative side input terminal) 62 connected to the negative side output terminal 17 of the antenna 12, and a first positive side for taking out the accumulated positive side charge. Charge extracting terminal (for example, positive polarity side charge extracting terminal) 65 and a second charge extracting terminal (for example, negative polarity side charge extracting terminal) 66 for extracting the accumulated negative polarity side charge. .

  Between the positive polarity side charge extraction terminal 65 and the negative polarity side charge extraction terminal 66, a plurality of backflow prevention elements (for example, diodes connected in the reverse direction) 64-1 to 64-5,. Are connected in series. Between the odd-numbered places between the plurality of diodes 64,... And the positive input terminal 61, a plurality of first charge storage elements (for example, capacitors) 63-1, 63-3,. .. Are connected, and a plurality of second charge storage elements (for example, capacitors) 63 are also connected between the even-numbered places between the plurality of diodes 64... And the negative side input terminal 62. -2, 63-4, ... are connected.

  The power storage unit 40 connected to the positive polarity side output node N1 and the negative polarity side output node N2 inputs charges between the output nodes N1 and N2 from the positive polarity side input terminal 42 and the negative polarity side input terminal 43. It accumulates and outputs from the positive polarity side output terminal 46 and the negative polarity side output terminal 47, and is constituted by charge accumulation means (for example, an electric double layer capacitor) 45 connected in series between the input terminals 42 and 43. Has been. The negative polarity side output terminal 47 is connected to the ground GND.

  6 (a) and 6 (b) are diagrams showing structural examples of the antenna 12-11 and the power generation module circuit 31-11 in FIG. 5. FIG. 6 (a) is a circuit configuration diagram and FIG. FIG. 5B is a schematic cross-sectional view of the circuit portion 60 in FIG.

The power generation module circuit 31-11 is formed in the plurality of N wells 22 in the P-type semiconductor substrate 21 by, for example, a CMOS process. Within several N-well 64-2,64-3,64-4, is formed P + regions and N + region for constituting the PN junction diode, further, each of these P + regions and N + regions A gate electrode 23 is formed on the gap via a gate insulating film serving as a dielectric. These gate electrodes 23 are connected to input terminals 61 and 62.

The P + region and the N well 64-2 form a PN junction diode 64-2, and the N well 64-2 and the gate electrode 23 form a capacitor 63-1. Similarly, the P + region and the N-well 64-3, a diode 64-3 of the PN junction formed by the N-well 64-3 and the gate electrode 23, the capacitor 63-2 is formed, and the P + region The N well 64-4 forms a PN junction diode 64-4, and the N well 64-4 and the gate electrode 23 form a capacitor 63-3.

  Note that the entire mounting structure of the radio wave generator shown in FIG. 5 of the second embodiment is the same as that of FIG. 3 of the first embodiment.

(Operation)
FIGS. 7A and 7B are explanatory diagrams showing operation states 1 and 2 in the power generation module circuit 31-11 in FIG.

  The overall operation of the radio wave generator shown in FIG. 5 of the second embodiment is substantially the same as that of the first embodiment. That is, an incoming radio wave is received by the antenna unit 10, and a charge pump operation is performed in the power generation module unit 20 using a potential difference generated by the received radio wave. The power storage unit 40 is charged with electric power.

  Hereinafter, the charge pump operation in the power generation module circuit (for example, 31-11) of FIG. 6 which is a feature of the second embodiment will be described with reference to FIGS. 7 (a) and 7 (b).

  In FIG. 6, a potential having a phase difference of 180 ° is generated at the output terminals 16 and 17 at both ends of the antenna 16 that has captured the radio wave. This electric potential is coupled to both ends of each of the diodes 64-1 to 64-5 via the capacitors 63-1 to 63-4 in an alternating current (AC) manner, and a charge pump operation (charge accumulation operation) is performed.

  In the operation state 1 in FIG. 7A, the diodes 64-1, 64-3, 64-5 charged with positive charges on the anode side and negative charges on the cathode side via the capacitors 63-1, 63-3 are connected. A forward current flows. Due to this current, charges are accumulated in the capacitors 63-2 and 63-4 connected to the cathodes of the diodes 64-3 and 64-5. At this time, the diodes 64-2 and 64-4 are turned off. In the operation state 2 of FIG. 7B, the potential applied to the capacitors 63-2 and 63-4 is opposite to that in the operation state 1, and a forward current flows through the diodes 64-2 and 64-4. At this time, the diodes 64-1, 64-3, and 64-5 are turned off.

  By repeating such operation states 1 and 2, a current flows from the negative charge extraction terminal 66 of the power generation module circuit 31-11 to the positive charge extraction terminal 65, and is sent to the output node N1 side to store electricity. The unit 40 is charged.

(effect)
According to the radio wave generator of the second embodiment, there are the following effects in addition to the effects similar to the effects (a) and (b) of the first embodiment.

  In the second embodiment, since the power generation module circuit 31 is configured by a charge pump circuit, the charge storage efficiency is high, and it can be easily manufactured by a CMOS process or the like, so that the cost can be reduced.

  The radio wave generators of Examples 1 and 2 are, for example, a mobile phone equipped with a storage battery (secondary battery) for power supply, a digital camera, a portable game device, a portable music player, an electric calculator (calculator), an electronic dictionary, a remote Used as a power supply replenishment module such as control (remote control), temperature / humidity meter, temperature / humidity control system, digital multi-tester, IC tag, etc. Or it can apply to various uses, such as for the power supply of small devices, such as a wristwatch. An example of this application example is shown in FIG.

  FIG. 8 shows a third embodiment of the present invention, and is a schematic configuration diagram of a digital multi-tester showing an application example in the radio wave generators of FIGS. 1, 2, and 5.

  This digital multi-tester is a tester on which the radio power generator of FIG. 1, FIG. 2 or FIG. 5 is mounted, and includes an antenna unit 10 (10-1, 10-2), a power generating module unit 20, and the radio power generator. And a power storage unit 40, and a tester unit 70 is connected to the output terminal of the power storage unit 40. The tester unit 70 has a storage battery 71 for driving power source charged by the output power of the power storage unit 40, and a control unit 72 such as a central processing unit (hereinafter referred to as “CPU”) that controls the entire tester unit. A measurement terminal 73, operation keys 74, a display 75 such as a liquid crystal display (LCD), an alarm buzzer 76, and the like are connected to the control unit 72.

  This digital multi-tester is driven by the storage battery 71, and when the temperature, humidity, electrical characteristics, etc. of the object to be measured are detected by the measurement terminal 73, this detection signal is digitally processed by the control unit 72 and the detection result is displayed. Displayed on the device 75. When the power supply amount of the storage battery 71 is reduced, the storage battery 71 is charged with the output power of the power storage unit 40 at any time. Therefore, it is not necessary to charge the storage battery 71, which is convenient and convenient to use.

(Modification)
The present invention is not limited to the first and second embodiments, and various usage forms and modifications are possible. For example, the following forms (1) to (4) are available as usage forms and modifications.

  (1) The antennas 12 (= 12-11 to 12-mn) constituting the antenna units 10, 10-1 and 10-2 are not limited to the fractus antenna and the loop antenna as in Patent Document 3, and are the same. You may comprise with the multilevel antenna of the patent document 2 in which an element (device) or isolation | separation structure is possible, another planar antenna, etc.

  (2) In each power generation module circuit 31 (= 31-11 to 31-mn) in FIG. 2, if a first backflow prevention element (for example, a forward diode or the like) is additionally connected in series with the capacitor 34. The energy received from the antenna 12 can be stored in the capacitor 34 efficiently. Alternatively, the MOS transistor 33 may use another amplifying element (for example, another amplifying transistor such as a bipolar transistor or an amplifying circuit element constituted by a plurality of transistors). . At this time, the capacitors 38-1 to 38-m and 39-1 to 39-m constituting the bias circuit may be changed to other circuit elements or other circuits according to the amplifying elements to be used.

  (3) Instead of this, the electric double layer capacitor 45 of the power storage unit 40 may use other charge storage means such as a lithium ion secondary battery suitable for downsizing. At this time, it may be changed to another circuit configuration such as adding an overcurrent cutoff switch or the like according to the charge storage means to be used.

  (4) The mounting structure of the radio wave power generation apparatus according to the first and second embodiments is not limited to the structure shown in FIG. 3, and various changes can be made.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the radio wave power generator showing Example 1 of the present invention. It is the detailed block diagram which actualized the radio wave generator of FIG. It is typical sectional drawing which shows the example of a mounting structure of the radio wave generator of FIG. FIG. 4 is a waveform diagram illustrating a charging operation from the power generation module unit 20 of FIGS. 2 and 3 to the power storage unit 40. FIG. 7 is a detailed configuration diagram illustrating the second embodiment of the present invention and illustrating another specific example of the radio wave power generator of FIG. 1. It is a figure which shows the structural example of the antenna 12-11 in FIG. 5, and the electric power generation module circuit 31-11. It is operation | movement explanatory drawing which shows the operation states 1 and 2 in the electric power generation module circuit 31-11 of FIG. FIG. 9 is a schematic configuration diagram of a digital multi-tester illustrating a third embodiment of the present invention and illustrating an application example in the radio wave power generation apparatus of FIGS.

Explanation of symbols

10, 10-1, 10-2 Antenna unit 12, 12-11 to 12-mn Antenna 20 Power generation module unit 30-1 to 30-m Series module 31, 31-11 to 31-mn Power generation module circuit 33 Transistor 34, 38-1 to 38-m, 39-1 to 39-m, 63-1 to 63-4 capacitor 40 power storage unit 44, 64-1 to 64-5 diode 45 electric double layer capacitor

Claims (15)

  1. An antenna unit in which a plurality of antennas made of a conductive pattern are disposed on a first substrate;
    A plurality of power generation module circuits that capture and store electric charge from the output signal of the antenna have a plurality of series circuits connected in cascade, and the plurality of series circuits are connected to a first output node and a second circuit on a second substrate. A power generation module connected in parallel with the output node;
    A power storage unit that accumulates electric charges between the first output node and the second output node and outputs the accumulated electric charge from an output terminal;
    A radio wave generator comprising:
    Each of the power generation module circuits is
    A common terminal,
    A first charge extraction terminal;
    A second charge extraction terminal;
    An amplifying element connected between the common terminal and the first charge extraction terminal and amplifying an output signal of the antenna;
    A charge storage element connected between the first charge extraction terminal and the second charge extraction terminal, for accumulating the charge of the output signal amplified by the amplification element;
    A radio wave generator characterized by comprising:
  2. Each power generation module circuit in the radio wave power generator according to claim 1 further includes:
    A radio wave generator comprising a bias circuit connected to the amplifying element.
  3. Each power generation module circuit in the radio wave power generator according to claim 1 or 2,
    A radio wave power generation device comprising: a first backflow prevention element connected in series to the first charge storage element.
  4. 4. The storage device according to claim 1, wherein the power storage unit includes a second backflow prevention element and charge storage means connected in series between the first output node and the second output node. The radio wave power generator according to any one of the above.
  5. The radio wave generator according to claim 1, wherein the antenna is configured by a fractus antenna or a multilevel antenna.
  6. The radio power generator according to claim 1, wherein the amplifying element is configured by an amplifying transistor, and the charge storage element is configured by a capacitor.
  7. The radio power generator according to any one of claims 2 to 6, wherein the bias circuit includes a capacitor.
  8. The radio wave generator according to any one of claims 3 to 7, wherein the first backflow prevention element is configured by a diode connected in a forward direction.
  9. The said 2nd backflow prevention element is comprised by the diode connected to the forward direction, The said charge storage means is comprised by the storage battery or the electric double layer capacitor, The any one of Claims 4-8 characterized by the above-mentioned. The radio wave generator according to item 1.
  10. An antenna unit in which a plurality of antennas made of a conductive pattern are disposed on a first substrate;
    A plurality of power generation module circuits that capture and store electric charge from the output signal of the antenna have a plurality of series circuits connected in cascade, and the plurality of series circuits are connected to a first output node and a second circuit on a second substrate. A power generation module connected in parallel with the output node;
    A power storage unit that accumulates electric charges between the first output node and the second output node and outputs the accumulated electric charge from an output terminal;
    A radio wave generator comprising:
    Each of the power generation module circuits is
    Consists of a charge pump circuit that takes in and accumulates charge from the output signal of the antenna,
    The charge pump circuit
    A first input terminal for inputting an output signal on the positive polarity side of the antenna;
    A second input terminal for inputting an output signal on the negative polarity side of the antenna;
    A first charge extraction terminal for extracting the accumulated positive charge;
    A second charge extraction terminal for extracting the accumulated negative charge,
    A plurality of backflow prevention elements connected in series between the first and second charge extraction terminals;
    A plurality of first charge storage elements connected between odd-numbered locations between the plurality of backflow prevention elements and the first input terminal;
    A plurality of second charge storage elements connected between even-numbered places between the plurality of backflow prevention elements and the second input terminal;
    A radio wave generator characterized by comprising:
  11. The backflow prevention element is constituted by a diode connected in the reverse direction,
    11. The radio wave power generator according to claim 10, wherein the first and second charge storage elements are each constituted by a capacitor.
  12. The radio wave generator according to claim 10 or 11, wherein the antenna comprises a loop antenna.
  13. 13. The power storage unit according to claim 10, wherein the power storage unit includes charge storage means connected in series between the first output node and the second output node. Radio power generator.
  14. 14. The radio wave power generator according to claim 13, wherein the charge storage means is constituted by a storage battery or an electric double layer capacitor.
  15. The radio power generator according to claim 11, wherein the diode and the capacitor are configured by MOS transistors.
JP2006330863A 2006-12-07 2006-12-07 Radio wave generator Active JP4445955B2 (en)

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