JP5100330B2 - Electromagnetic wave generator - Google Patents

Description

  The present invention relates to an electromagnetic wave generating device that generates an electromagnetic wave pulse, and in particular, generates a high output electromagnetic wave at a frequency on the order of GHz by driving a virtual cathode electron tube as an electromagnetic wave oscillation element with a high voltage pulse. It is related with the electromagnetic wave generator which can be applied.

  As a conventional electromagnetic wave generator, for example, there is one described in Patent Document 1, which will be described with reference to FIG. The electromagnetic wave generator shown in FIG. 10 includes a capacitor group 1 that acts as a DC voltage generating means that generates a DC voltage, and an MC (Magnetic Cumulation) that acts as an energy amplifying means that amplifies the current supplied from the capacitor group 1. (Concentration) type explosive generator 3, an air core transformer 6 connected to the primary side of this MC type explosive generator 3 and acting as an energy storage means for storing the amplified current as electric energy, and two air core transformers 6 It is connected to the secondary side, is normally closed, and allows electric energy to pass through the air core transformer 6. When the control signal from the control unit 40 is applied to the MC-type explosive generator detonator 30, it becomes open. Plasma switch 7 acting as a switching means for generating voltage pulses, and higher high voltage pulses generated by plasma switch 7 It comprises a air-core transformer 11 as boosting means for boosting the pressure.

  Further, the gap switch 10 that operates as a waveform shaping means for supplying a high-speed rising pulse voltage waveform, and operates when the voltage value of the high-voltage pulse reaches a predetermined value in a normally open state, and a high voltage having a high-speed rising waveform. When a pulse is applied between the anode 12a and the cathode 12b, a virtual cathode electron tube 12 that acts as electromagnetic wave generating means that generates electromagnetic waves, an antenna 13 that is connected to the virtual cathode electron tube 12 and acts as electromagnetic wave radiation means, and a capacitor The switch 2 connected between the group 1 and the MC type explosive generator 3, the switch 2, the MC type explosive generator detonator 30 provided in the MC type explosive generator 3, and the plasma switch 7. And a control unit 40 that supplies an activation signal or control signal to the plasma switch detonator 31 at a predetermined timing. .

  In the electromagnetic wave generator having such a configuration, when the switch 2 is closed by the control signal from the controller 40, the MC explosive generator 3 amplifies the current generated from the capacitor group 1 while reducing the inductance. Meanwhile, the air core transformer 6 and the plasma switch 7 are energized. When the amplification is completed, the inductance becomes zero and electric energy is accumulated in the air core transformer 6.

  The plasma switch 7 is normally closed and allows electric energy to pass through the air core transformer 6. When the control signal is given from the control unit 40, the plasma switch 7 is opened and generates a high voltage pulse. When the energy transfer from the air-core transformer 6 to the plasma switch 7 is normally performed due to the presence of the inductance at 6, the high voltage pulse generated in the plasma switch 7 takes a large value.

  The air core transformer 11 boosts the high voltage pulse to a higher voltage. When the voltage value of the high voltage pulse reaches a predetermined value, the gap switch 10 operates, and it becomes possible to apply a high voltage pulse having a high-speed rising voltage waveform to the virtual cathode electron tube 12. Electromagnetic waves are emitted.

  The value of the high voltage pulse is proportional to the product of the inductance value of the circuit when the plasma switch 7 is switched and the time change rate of the current, but the primary leakage inductance value of the air-core transformer 6 is set to 0.5 μH, for example. By setting the secondary leakage inductance value to, for example, approximately 5 μH to 10 μH, it is possible to accumulate energy in the air-core transformer 6 without impeding the current amplification action of the MC-type explosive generator 3, and when the plasma switch 7 is in operation. The product of the inductance value and the time change rate of the current is increased, and the value of the pulse voltage generated by the plasma switch 7 can be increased.

  The high voltage pulse is further boosted by the air core transformer 11 and applied to the virtual cathode electron tube 12 so that a high frequency and high output electromagnetic wave is output from the antenna 13.

JP 2006-332899 A

  By the way, in the electromagnetic wave generator of the above-mentioned patent document 1, since explosives are used in the two devices of the MC type explosive generator 3 and the plasma switch 7, the space of the device becomes large and the configuration of the control device 40 becomes complicated. . In addition, two air-core transformers, ie, an air-core transformer 6 for energy storage and an air-core transformer 11 for boosting are required, so that the configuration of the entire device is complicated and the size of the device is increased.

  The present invention has been made in view of such a problem, and can generate a high-voltage and fast-rising voltage pulse necessary for operating a virtual cathode electron tube with a small number of constituent devices. It aims at providing the electromagnetic wave generator which can radiate | emit high output electromagnetic waves by structure.

  In order to achieve the above object, a first configuration of an electromagnetic wave generator according to the present invention includes a DC voltage generating means for generating a DC voltage and a voltage generated while amplifying the current supplied from the DC voltage generating means. Energy amplifying means, energy storing / converting means for converting the current or voltage generated by the energy amplifying means into higher voltage while accumulating as electric energy, and electric energy obtained by the energy accumulating / converting means Energy storage means for storing, waveform shaping means for outputting a high voltage pulse having a high-speed rising waveform when the voltage value of electric energy stored in the energy storage means reaches a predetermined value, and waveform shaping means High-frequency generating means for generating an electromagnetic wave by applying a high-voltage pulse having a high-speed rising waveform from An antenna for radiating electromagnetic waves generated by the wave generator, characterized in that a control signal to said energy amplifying means and a control means for outputting a predetermined timing.

  Such a configuration includes, for example, a switch that operates when a control signal is applied, a capacitor group that functions as a DC voltage generating unit that generates a DC voltage, and operates and is supplied from the capacitor group when a control signal is applied. MC type explosive generator that acts as an energy amplifying unit that amplifies current, energy storage / conversion device that converts amplified current and voltage into high voltage while accumulating the amplified current, and electrical energy supplied from the energy storage / conversion device Capacitor that acts as an energy storage means for accumulating and a gap switch that is connected to the capacitor, operates normally when the capacitor reaches a predetermined value in an open state, and acts as a waveform shaping unit that supplies a fast rising voltage waveform When a high voltage pulse with a fast rising waveform is applied, The MC-type explosive including a generated virtual cathode-ray tube, an antenna connected to the virtual cathode electron tube and acting as an electromagnetic wave radiation unit, and a control means for supplying a control signal to the energy amplification means at a predetermined timing The generator includes a liner containing an explosive and an electric detonator that explodes when the control signal is given, and causes the explosive to explode, and a coil provided generally on the outer periphery of the liner, the virtual cathode electron tube being When a high voltage pulse is applied to the cathode and the anode that are arranged opposite to each other in the vacuum vessel, the electromagnetic wave generator oscillates and generates a high output microwave.

  Further, a second configuration of the electromagnetic wave generator according to the present invention is the first configuration, wherein the energy storage / conversion means is an air core transformer having a primary winding and a secondary winding, and the primary winding. The wire has a number of turns of 1 to 3 so that the primary inductance is generally within 1 μH, and the secondary winding has at least 10 times the number of turns of the primary winding.

  According to a third configuration of the electromagnetic wave generator according to the present invention, in the first configuration, the energy storage / conversion unit includes at least two Rogowski-type transformers having windings of 50 turns or more. The Rogowski-type transformer coil is passed through the output side conductor of the energy amplifying means, the Rogowski-type transformer coil is connected in series, and a voltage detection resistor is provided between the coil ends. .

  According to the first configuration of the electromagnetic wave generator of the present invention, the energy amplifying means amplifies the current generated from the DC voltage generating means while reducing the inductance, and simultaneously generates a voltage. This is energized to an energy storage / conversion device, which is an energy storage / conversion unit, and the generated voltage is converted into a high voltage by the energy storage / conversion unit and stored in a capacitor, which is an energy storage unit. When the voltage value of this capacitor reaches a predetermined value, the waveform shaping means operates, and it becomes possible to apply a high voltage pulse having a fast rising voltage waveform to the high frequency generating means acting as an electromagnetic wave generating device. Microwaves are generated, and high-frequency and high-power electromagnetic waves are output from the antenna.

  According to the second configuration of the electromagnetic wave generator according to the present invention, the energy storage / conversion device is configured by an air core transformer, and the primary winding of the air core transformer has an inductance of approximately 1 μH or less. Therefore, the MC type explosive generator acting as the energy amplifying means does not hinder the function of amplifying the current. Further, since the secondary winding of the air-core transformer has a number of turns more than 10 times that of the primary winding, a high voltage pulse is induced in the secondary winding, causing the virtual cathode electron tube to oscillate and high output. The electromagnetic wave pulse can be obtained.

  According to the third configuration of the electromagnetic wave generator according to the present invention, at least two Rogowski-type transformers having windings of 50 turns or more are connected to the coil and liner of the MC-type explosive generator. The Rogowski-type transformer coil is connected in series with a conductor, and a voltage detection resistor is provided between the ends of the coil, so that the voltage pulse generated by the MC-type explosive generator is converted into a high-voltage pulse. It is possible to oscillate the virtual cathode electron tube and obtain a high-power electromagnetic wave pulse.

  As described above, according to the electromagnetic wave generator according to the present invention, the output of the voltage pulse generated by the MC-type explosive generator is directly converted into a high voltage pulse, so that the virtual cathode electron tube can be operated with a simple configuration. There is an effect that it is possible to generate a high-output electromagnetic wave voltage pulse having a required high voltage and a fast rise, and the entire electromagnetic wave generator can be downsized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing the configuration of the electromagnetic wave generator according to Embodiment 1 of the present invention. The electromagnetic wave generator shown in FIG. 1 includes a capacitor group 1 that functions as a DC voltage generating unit that generates a DC voltage, and an MC that functions as an energy amplifying unit that generates a voltage while amplifying the current supplied from the capacitor group 1. The explosive generator 3 and the MC explosive generator 3 are connected to the primary side, and the amplified current or voltage generated by the MC explosive generator 3 is converted into a higher voltage while accumulating as electric energy. An air core transformer 4 acting as energy storage / conversion means, and a capacitor 8 connected to the secondary side of the air core transformer 4 and acting as energy storage means for accumulating electrical energy obtained by the air core transformer 4; Is provided.

  Furthermore, when the voltage value of the high voltage pulse of the electric energy stored in the capacitor 8 acting as the energy storage means becomes a predetermined value, it is normally turned on and operates at a high speed. A gap switch 10 acting as waveform shaping means for outputting and supplying a high voltage pulse, and an electromagnetic wave when a high voltage pulse having a fast rising waveform from the gap switch 10 is applied between the anode 12a and the cathode 12b. A virtual cathode electron tube 12 that acts as a high-frequency generating means for generating a voltage, an antenna 13 that is connected to the virtual cathode electron tube 12 and acts as an electromagnetic wave radiation means for radiating electromagnetic waves generated by the virtual cathode electron tube 12, and a capacitor group 1 Connected to the MC explosive generator 3, the switch 2 and the MC type Is constituted by a control unit 40 that the activation signal or the control signal to the MC-type explosive generator for detonators 30 provided in the medicine generator 3 as a control means for supplying a predetermined timing.

  The capacitor group 1 is configured as DC voltage generating means by connecting a plurality of single capacitors in series and parallel. More specifically, a necessary number of capacitors can be connected in series to obtain a desired voltage, and capacitors can be connected in parallel to obtain a desired current.

  In addition to the capacitor group 1, the DC voltage generating means can be constituted by a battery or an MHD (magnetohydrodynamic) generator.

  As shown in FIG. 2 (a), the MC-type explosive generator 3 has a liner 3b filled with an explosive 3c and a coil 3a configured along the outer periphery of the liner 3b. Insulation gas is sealed between 3a and the liner 3b, and a detonator 30 for an MC-type explosive generator is provided, which explodes when an activation signal is given from the control unit 40 to the explosive 3c. Yes. One terminal of the coil 3 a is connected to the capacitor group 1, and the other terminal is connected to the air core transformer 4.

  When the detonator 30 for MC type explosive generator provided in the explosive 3c is detonated to explode the explosive 3c, as shown in FIG. 2 (b), the liner 3b is sequentially expanded and the coil 3a is sequentially short-circuited. The inductance of the coil 3a is reduced. On the other hand, since the magnetic flux φ in the coil 3a is kept constant as can be seen from {φ (magnetic flux) = L (inductance) × i (current) = constant}, the current is rapidly amplified.

  In this way, the MC-type explosive generator detonator 30 to which the initiation signal is given detonates and explodes the explosive 3c, and the liner 3b is sequentially expanded to short-circuit the coil 3a. As shown in FIG. 3B, a voltage is also generated.

  FIG. 4B schematically shows a conventional air core transformer. In FIG. 4B, 6 is an air core transformer, 6a is a primary coil, 6b is a secondary coil, and 20a to 20d are electrical wirings.

  The primary coil 6a of the air core transformer 6 has one or two windings so as not to interfere with the current amplification action of the MC explosive generator 3 and has a low inductance of 1 μH or less. The secondary coil (winding) 6b is configured to have a small number of windings of 5 times or less in order to increase the current supply to the plasma switch 7 as much as possible.

  FIG. 4 (a) schematically shows an air-core transformer serving as an energy storage / conversion means according to the present invention. In FIG. 4 (a), 4 is an air core transformer serving as energy storage / conversion means, 4a is a primary coil (winding), 4b is a secondary coil (winding), and 20c to 20f are electrical wirings.

  The primary coil (winding) 4a of the air core transformer 4 has one or two turns so that the primary inductance is within 1 μH (below) so as not to interfere with the current amplification function of the MC explosive generator 3. It has a low inductance. The number of turns of the primary coil (winding) 4a of the air-core transformer 4 can be changed from 1 turn to 3 turns so that the primary side inductance is generally within 1 μH.

  The secondary coil (winding) 4b has at least 10 times the number of turns of the primary coil (winding) 4a in order to maximize the voltage induced in the secondary coil (winding) 4b. Thus, the winding ratio is 10 times or more.

  Next, an energy storage discharge capacitor 8 serving as an energy storage means will be described with reference to FIG. Since the capacitor 8 is directly connected to the secondary coil (winding) 4b of the air-core transformer 4, the electric energy induced in the secondary coil (winding) 4b is stored as it is.

  Next, the gap switch 10 serving as the waveform shaping means will be described with reference to FIG. FIG. 5A schematically shows an example of the configuration of the gap switch 10.

  The gap switch 10 has two electrodes 10a and 10b formed in a spherical shape made of a conductive material such as copper, facing each other through a narrow gap in the air, and connects the wires 20e and 20g to the electrodes 10a and 10b. 10a and 10b and electric wires 20c arranged in parallel with the electrodes 10a and 10b are connected to a capacitor 8 serving as an energy storage unit and a virtual cathode electron tube 12 serving as a high-frequency generation unit.

  The operation of the gap switch 10 will be described with reference to FIGS. 5B and 5C. In FIG. 5B, the vertical axis indicates the charging voltage of the capacitor 8, and the horizontal axis indicates time. In FIG. 5C, the vertical axis indicates the output voltage of the gap switch 10, and the horizontal axis indicates time.

  When the charging voltage of the capacitor 8 reaches a predetermined voltage value determined by the gap between the electrodes 10a and 10b of the gap switch 10, the gap switch 10 operates at time t4 shown in FIG. ) Is supplied to the virtual cathode electron tube 12 as shown in FIG. That is, the gap switch 10 functions as waveform shaping means.

  Next, the virtual cathode electron tube 12 will be described with reference to FIG. As shown in FIG. 6A, the virtual cathode electron tube 12 is configured with an anode 12a and a cathode 12b facing each other in a metal vacuum vessel. The anode 12a is constituted by a metal mesh, and the cathode 12b is constituted by attaching a velvet to the tip of a cylindrical metal. As shown in FIG. 6B, the virtual cathode electron tube 12 emits plasma from the cathode 12b when a pulse voltage of approximately 200 kV or more is applied between the anode 12a and the cathode 12b, and the electrons in the plasma are negative. Is accelerated by the high-voltage pulse and travels toward the anode 12a. Electrons heading for the anode 12a reach the virtual cathode that does not exist over the anode 12a, change direction from this position, and vibrate at a very high speed. This electron vibration is output to the antenna 13 as an electromagnetic wave.

  The antenna 13 is for radiating an electromagnetic wave output from the virtual cathode electron tube 12, and can be realized by a parabola type, a pyramid horn type, a conical horn type, a conical horn type with a lens, or the like. In order to connect the virtual cathode electron tube 12 and the antenna 13, a high-frequency device such as a waveguide or a corner vent may be used as necessary.

  The control unit 40 performs a control operation to be described later. For example, a ROM (Read-Only Memory) incorporating an operation program and a CPU (Central Control Unit) that outputs a desired signal according to the operation program It can be realized with a processing unit (central processing unit).

  Also, the detonator 30 for MC type explosive generators is the No. 6 electric detonator for industrial use, the electric detonator for earthquake search with high time accuracy, the gas conduit detonation system, the nonel system (both systems are non-electric detonation systems Malfunction) due to the current is prevented, and high reliability is used. In addition, explosives such as dynamite, hydrous explosives, nitrate explosives, explosive explosives, PETN (Penta Erithritol Tetra. Nitrate), RDX (Research Department Explosive), HMX (High Meltingpoint Explosive) Melting explosives), TNT (TriNitro Torien) bombs, etc., or a single product or a mixture of two or more, or oils / silicone binders, and oxidants such as nitrates / chloric acid. Should be used.

  The operation of the electromagnetic wave generator according to the first embodiment having such a configuration will be described with reference to FIGS.

  However, as the capacitor group 1, six 45 μF capacitors connected in parallel and charged at a voltage of 7.5 KV are used. As the MC-type explosive generator 3, one having a total length of 1000 mm, a diameter of 200 mm, a coil diameter of 160 mm, a coil pitch of 8 mm, a coil winding number of 63, and a coil initial inductance of 100 μH is used. As the air core transformer 4, one having a diameter of 0.2 m, a length of 0.1 m, a primary coil of 2 turns, a secondary coil of 40 turns, a primary leakage inductance of 1 μH, a secondary leakage inductance of 330 μH, and a mutual inductance of 2.5 μH is used. A capacitor of 20 nF was used.

  As the gap switch 10, a spherical gap having a diameter of 10 mm is opposed to the air, the gap interval is 8 mm, the operating voltage is 200 kV, and the pulse rise is 100 ns. A virtual cathode electron tube 12 having a frequency of 10 GHz, an output of 20 MW, and a pulse voltage of 200 KV was used, and an antenna 13 having a pyramid horn antenna and a gain of 20 dB was used.

  FIG. 7A shows the supply timing of the control signal and the start signal by the control unit 40. First, as shown in FIG. 7A, the control unit 40 supplies the start signal to the switch 2. As a result, current is supplied from the capacitor group 1 to the MC-type explosive generator 3. For example, when the control unit 40 supplies an activation signal to the electric detonator 30 approximately after t2 = 100 μs, the explosion occurs.

  As a result, current flows while amplifying the primary coil 4 a of the capacitor group 1, the MC-type explosive generator 3, and the air core transformer 4, and at the same time, a pulse voltage is induced in the secondary coil 4 b of the air core transformer 4. This induced voltage causes a current to flow through the secondary coil 4b of the air-core transformer 4, and charges the capacitor 8 to a voltage of approximately 250 kV while accumulating electrical energy in the secondary coil 4b of the air-core transformer 4.

  The pulse voltage V is applied to the primary side of the gap switch 10, and in response to this, the pulse voltage V shown in FIG. 7E is output from the secondary side of the gap switch 10. That is, when the pulse voltage applied to the gap switch 10 reaches a predetermined voltage value determined by the gap interval, a discharge occurs between the gaps, and a high voltage pulse with a fast rise time is generated on the secondary side of the gap switch 10. To do.

  Since the discharge voltage between the gaps of the gap switch 10 is set to 200 kV, a voltage of 200 kV or more is applied to the virtual cathode electron tube 12.

  When this rapidly rising high voltage pulse is applied between the anode 12 a and the cathode 12 b of the virtual cathode electron tube 12, an electromagnetic wave is oscillated, and this electromagnetic wave is radiated from the antenna 13.

  The output waveforms of the main part of the electromagnetic wave generation device up to this electromagnetic wave emission are shown in FIGS. 7A shows the output current of the MC-type explosive generator 3, FIG. 7B shows the voltage of the primary coil 4a of the air core transformer 4, and FIG. 7C shows the output of the secondary coil 4b of the air core transformer 4. 7D shows the second output voltage of the gap switch 10, and FIG. 7E shows the waveform of the 12 output power of the virtual cathode electron tube.

  As described above, according to the electromagnetic wave generator of Example 1, even the virtual cathode electron tube 12 in which the applied pulse voltage rises quickly and the oscillation condition lower limit voltage is high oscillates an electromagnetic wave with high output and high frequency (GHz order). And can be radiated from the antenna 13.

  FIG. 7D shows the waveform of the output voltage of the gap switch 10 according to this embodiment, and the peak value of the pulse voltage is 250 kV. By applying the pulse voltage of 250 kV, the virtual cathode electron tube 12 oscillates, and an electric field strength of 2.4 kV / cm or more is obtained at a frequency of about 10 GHz to 15 GHz, power of 20 MW or more from the antenna 13 and 1 m from the antenna 13. Obtained.

  As described above, in spite of a device having a simple configuration, an output power almost equal to that of the conventional device could be obtained.

  FIG. 8 is a block diagram showing the configuration of the electromagnetic wave generator according to Embodiment 2 of the present invention.

  The electromagnetic wave generator shown in FIG. 8 is different from the electromagnetic wave generator of the first embodiment in that a logo having windings of 50 turns or more is used as energy storage / conversion means instead of the air core transformer 4 shown in FIG. At least two ski transformers 5 are arranged side by side, and as shown in FIG. 9, wirings 20c and 20d, which are output side conductors from the MC explosive generator 3 serving as energy amplification means, are connected to the Rogowski transformer 5, respectively. The coil 5a is used as a primary conductor, the ends of the respective coils 5a of the Rogowski transformer 5 are connected in series and wired, and a voltage detecting resistor 9 is provided between the ends of the coil 5a. .

  The mutual inductance between the primary conductors 20c and 20d as output side conductors from the MC-type explosive generator 3 serving as energy amplification means and the coil 5a of the Rogowski transformer 5 serving as energy storage / conversion means is M, primary. If the current flowing through the conductors 20c and 20d is i, the voltage induced in the coil 5a of the Rogowski transformer 5 is V = M × (di / dt). When a plurality of Rogowski-type transformers 5 are connected in series, a voltage proportional to the number is obtained.

  As an example, the number of turns of the coil 5a of the Rogowski transformer 5 is 100, the radius of the coil 5a is 0.02 (m), the radius of the circumference of the coil 5a is 0.01 (m), and the primary portion of the through portion When the conductor length of the conductors 20c and 20d is 0.05 (m), the peak of the current gradient of the MC-type explosive generator 3 is 100 kA / μs, and two Rogowski transformers 5 are connected in series, the terminal of the coil 5a A voltage of 250 kV could be obtained, and the results shown in FIG. 7 described above were obtained, equivalent to the case of the air core transformer 4 of the first embodiment.

  Thus, since the current and voltage of the MC type explosive generator 3 are directly converted into high voltage pulses using the Rogowski type transformer 5 which acts as an energy storage conversion means, the entire electromagnetic wave generator is reduced in size accordingly. be able to.

  In addition, as an application example of the above electromagnetic wave generators, it is conceivable to use these devices for evaluation of electromagnetic wave noise resistance of various electronic devices. Specifically, it is possible to evaluate the noise resistance of various electronic devices by irradiating the evaluation target device with electromagnetic waves radiated from the antenna 13 and evaluating the damage state.

  Moreover, it is also possible to use for the system which detects the electromagnetic wave radiated | emitted from an electromagnetic wave generator with the antenna by the side of a receiving base, and can grasp | ascertain the location of the apparatus which radiated | emitted electromagnetic waves. According to such a mode of use, it is possible to notify the location of the user in a remote place such as on the ocean or in a mountainous area.

  As described above, various applications of the electromagnetic wave generator are conceivable, and it goes without saying that the application examples described here are only a few. With the configuration using explosives as described above, it is possible to realize a device that can output high-power electromagnetic waves even with a small device configuration.

  As an application example of the present invention, it can be applied to an electromagnetic wave generator that generates an electromagnetic wave pulse, in particular, a virtual cathode electron tube which is an electromagnetic wave oscillation element is driven with a high voltage pulse to generate a high output electromagnetic wave at a frequency on the order of GHz, It can be applied to an electromagnetic wave generator that can be applied in various fields.

It is a block diagram which shows the structure of the electromagnetic wave generator which concerns on Example 1 of this invention. It is a block diagram of MC type explosive generator. (A), (b) is a figure which respectively shows current amplification and voltage generation when the detonator for MC type explosive generator detonates, explodes explosives, expands a liner sequentially, and short-circuits a coil. (A) is a block diagram of the air-core transformer as an energy storage / conversion means of this invention, (b) is a block diagram of the air-core transformer as an energy storage / conversion means of a prior art. (A) is a block diagram of the gap switch, (b) is a waveform diagram of the input voltage of the gap switch, (c) is a waveform diagram of the output voltage of the gap switch. (A) is a block diagram of a virtual cathode electron tube, (b) is an operation | movement principle explanatory drawing of a virtual cathode electron tube. (A) is a waveform diagram of current flowing through the lines of the capacitor group, MC type explosive generator, air core transformer, and supply timing diagram of the control signal or start signal of the control unit, and (b) is the primary coil of the air core transformer. (C) is a voltage waveform diagram induced in the secondary coil of the air-core transformer, (d) is a waveform diagram of an output pulse voltage from the secondary side of the gap switch, and (e) is a virtual diagram. It is a waveform diagram of the output power of the cathode electron tube. It is a block diagram which shows the structure of the electromagnetic wave generator which concerns on Example 2 of this invention. It is the block diagram and the connection diagram of the Rogowski transformer as an energy storage and conversion means which concern on Example 2 of this invention. It is a block diagram which shows the structure of the electromagnetic wave generator by a prior art.

Explanation of symbols

1. Capacitor group (DC voltage generating means)
2 ... Switch 3 ... MC type explosive generator (energy amplification means)
3a ... Coil 3b ... Liner 3c ... Explosive 4 ... Air-core transformer (energy storage / conversion means)
4a ... Primary coil 4b ... Secondary coil 5 ... Rogowski-type transformer (energy storage / conversion means)
5a ... Coil 6 ... Prior art air core transformer 6a ... Primary coil 6b ... Secondary coil 7 ... Plasma switch 8 ... Energy storage discharge capacitor (energy storage means)
9 ... Resistance for voltage detection 10 ... Gap switch (waveform shaping means)
DESCRIPTION OF SYMBOLS 10a, 10b ... Electrode 11 ... Prior art air core transformer 12 ... Virtual cathode electron tube (high frequency generation means)
12a ... anode 12b ... cathode 13 ... antenna (electromagnetic wave radiation means)
20, 20a-20h ... Electric wiring (electric wire)
30 ... Detonator for MC type explosive generator 31 ... Detonator for plasma switch 40 ... Control unit (control means)

Claims (3)

DC voltage generating means for generating a DC voltage;
Energy amplifying means for generating a voltage while amplifying the current supplied from the DC voltage generating means;
Energy storage / conversion means for converting the current or voltage generated by the energy amplification means into higher voltage while accumulating as electric energy;
Energy storage means for storing electrical energy obtained by the energy storage / conversion means;
Waveform shaping means that conducts at high speed when the voltage value of the electrical energy accumulated in the energy accumulation means reaches a predetermined value, and outputs a high voltage pulse with a fast rising waveform;
High-frequency generating means for generating an electromagnetic wave by applying a high-voltage pulse having a high-speed rising waveform from the waveform shaping means;
An antenna that radiates electromagnetic waves generated by the high-frequency generating means;
Control means for outputting a control signal to the energy amplification means at a predetermined timing;
An electromagnetic wave generator comprising: The energy storage / conversion means is an air-core transformer having a primary winding and a secondary winding, and the primary winding has a number of turns of 1 to 3 so that the primary inductance is generally within 1 μH, The electromagnetic wave generator according to claim 1, wherein the secondary winding has at least 10 times the number of turns of the primary winding. The energy storage / conversion means is configured by arranging at least two Rogowski type transformers having windings of 50 turns or more, and passing the coil of the Rogowski type transformer through the output side conductor of the energy amplification means. The electromagnetic wave generator according to claim 1, wherein the coil of the ski transformer is connected in series, and a voltage detection resistor is provided between the ends of the coil.

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