JPH098550A - Electromagnetic wave generator - Google Patents

Abstract

PURPOSE: To enhance the frequency of a generated electromagnetic and to increase the level. CONSTITUTION: A winding 3 is wound while forming a cylindrical gap at the outside of a metallic cylinder 24 in the inside of which an explosive 4 is loaded, and a fuse 15 is connected between the metallic cylinder 24 and an end of the winding 3 toward an anti-initiation device. Then a biconical antenna 27 is connected across the fuse 15 to initiate the explosive 4 while supplying an initial current to the winding 3, and the current flowing to the winding 3 is amplified to emit an electromagnetic wave to the surrounding and the biconical antenna 27 is connected to the fuse 15 via a gap 36.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for converting explosive energy of explosives into a large current, generating a strong electromagnetic wave from the large current, and evaluating resistance to electromagnetic noise of electronic devices and the like.

[0002]

26 is a perspective view showing the operating principle of an electromagnetic wave generator using explosives, (A) before operation and (B).
Indicates the operating state. FIG. 26A shows a metal cylinder 1 of good conductor such as copper, a winding 3, a metal cylinder 1 and a winding 3.
It is composed of a current source 6 for flowing an initial current I ₀ and a short-circuit conductor 7 connected to the right end. An explosive 4 is filled inside the metal cylinder 1, and a detonator 5 is fitted into the left end so as to come into contact with the explosive 4. Winding 3 is metal cylinder 1
Is wound in the axial direction through the space 2. When the detonator 5 is ignited to detonate the explosive 4 with the initial current I ₀ flowing, the explosion starts from the left end and propagates to the right end.

FIG. 26 (B) shows a state in which the explosion of the explosive 4 is being propagated after the detonation, and the metal cylinder 1 is expanded outward in the radial direction by the detonation wave 8 from the detonator 5 side. The winding 3 and the metal cylinder 1 are crimped while crushing the void portion 2 (hereinafter,
It is called explosion.) This blasting surface 9 advances toward the short-circuit conductor 7 side as the detonation wave 8 progresses, and finally the metal cylinder 1 is entirely blasted onto the winding 3.

The principle of electromagnetic wave generation will be described below with reference to FIG. In FIG. 26 (A), an initial current I ₀ is caused to flow from the current source 6 through the metal cylinder 1, the short-circuit conductor 7 and the winding 3 immediately before the detonator 5 is ignited, and the magnetic field (total magnetic flux is generated in the cylindrical void 2). The quantity is Φ). When the detonator 5 is ignited in that state, a detonation wave 8 is generated as shown in FIG.
As a result, the explosive surface 9 progresses to the short-circuit conductor 7 side at the propagation speed of the explosion (about 9 km / s). Since the explosive surface 9 progresses extremely rapidly in this way, even if the void 2 is crushed, the magnetic flux inside the void 2 does not leak to the outside, and the value of the total magnetic flux amount Φ is preserved as it is.

That is, if the inductance created by the reciprocal circuit of the metal cylinder 1 and the winding 3 before the detonation is L ₀ ,
The total magnetic flux amount Φ formed by the initial current I ₀ is

[0006]

Φ = L ₀ · I ₀ (1) On the other hand, if the inductance formed by the metal cylinder 1 and the winding 3 after the detonation is L and the output current flowing through the short-circuit conductor 7 at this time is I,

[0007]

Φ = L · I (2) If equation (1) is equal to equation (2),

[0008]

## EQU3 ## I / I ₀ = L ₀ / L (3) As the explosive surface 9 progresses toward the short-circuit conductor 7, the void 2 is crushed, and the distance in the axial length of the remaining void 2 is reduced, so that the inductance L is reduced. As a result, the magnetic field in the void portion 2 becomes stronger, and the output current I increases from the equation (3). This output current I flows through a closed loop formed by the metal cylinder 1, the short-circuit conductor 7 and the winding 3 through the explosive surface 9, and the current ratio I / I ₀ in the equation (3) becomes the current amplification factor. Correspond.

When this output current I flows through the winding 3, electromagnetic waves are generated in the surroundings. This device is a kind of current amplifier that loads the short-circuit conductor 7 and is also called an explosive generator. An electromagnetic wave can be formed in the surroundings by passing a current that rapidly rises to the order of megaamperes. FIG. 27 is a cross-sectional view showing the configuration of a conventional electromagnetic wave generator, in which the upper and lower stoppers 1 for closing the inside of the metal cylinder 1 at both ends.
4 is arranged, and the detonator 5 is inserted into the lower plug 14. A winding 3 and a cylindrical support insulator 13 are arranged outside the metal cylinder 1. A spiral groove is provided on the inner wall of the support insulator 13, the winding 3 is housed in this groove, and a void 2 is formed between the winding 3 and the metal cylinder 1. An insulating gap member 12 is interposed between the lower end of the winding wire 3 and the metal cylinder 1. On the other hand, between the upper end of the winding 3 and the metal cylinder 1, a short-circuit conductor 70 serving as a load and a gap material is interposed. The winding 3 and the metal cylinder 1 are connected to the current source 6 at the lower ends.

In FIG. 27, the winding 3 is wound by the current source 6.
With the initial current flowing through the short-circuit conductor 70 and the metal cylinder 1, the detonator 5 causes the explosive 4 to explode. The explosion propagates upward with time and the current flowing through the winding also increases, generating electromagnetic waves in the surroundings. An electronic device is arranged at a position separated from the device by a predetermined dimension, and the noise resistance against the electric field E caused by the electromagnetic wave is examined. The conductor width W of the winding 3 and the insulation gap D between the turns shown in FIG. 27 increase with increasing height. This is to reduce the inductance per unit length as going upward. As a result, the current amplification factor increases as shown in the equation (3), strong electromagnetic waves are oscillated, and the electric field E is formed in the surroundings.

FIG. 28 is a cross-sectional view of an essential part showing the structure of a conventional different electromagnetic wave generator. Soluble body 15 (fuse)
Is conductively connected to the metal cylinder 1 at the upper end of the winding 3.
A plurality of the fusible bodies 15 are scattered on the surfaces of the winding 3 and the metal cylinder 1 by soldering. The upper end of the metal cylinder 1 filled with the explosive 4 is closed with the plug 14 and is connected to one side of the biconical antenna 27. The other side of the biconical antenna 27 is connected to the upper end of the winding 3. Others are the same as the configuration of FIG.

The configuration of FIG. 28 has already been filed by the same applicant as the present invention for a patent application that the generated electric field E is significantly higher than that of the case of FIG. Generated electric field E
The reason for the high value is that the fusible member 15 and the biconical antenna 27 are provided. That is, the soluble body 15
Is temporarily liquefied by the output current I amplified by the explosion, and then becomes plasma. Generally, the amount of increase in resistance per unit time when a metal is melted in a liquid state is very large. Therefore, the current flowing through the winding 3 increases, and when the fusible body 15 melts, the potential difference V across the fusible body 15 suddenly increases rapidly. On the other hand, in the case of the device of FIG. 27, since the short-circuit conductor 70 does not melt, the resistance increase amount per unit time is zero, and the generated electric field E is determined only by the increase amount of the output current I due to the explosion per unit time.
By interposing the fusible body 15, the generated electric field E can be extremely increased. Further, by providing the pair of biconical antennas 27 at both ends of the fusible body 15,
An electric field is also generated by the displacement current flowing between the pair of antennas. Since this electric field is added to the electric field generated by the fusible body, the electric field E generated by the electromagnetic wave is further increased.

In FIG. 28, the antenna is the biconical antenna 27. FIG. 29 is a perspective view showing a configuration example of different antennas of the electromagnetic wave generation device. 29A shows a helical antenna 30, and FIG. 29B shows a conical spiral antenna 28. The shape of the antenna of the electromagnetic wave generator is not limited as long as it resonates at the frequency of the input voltage and can widely oscillate the electromagnetic wave. Further, in FIG. 29, a flat plate 29 is provided on one side of the antenna, but it may be rod-shaped or ring-shaped, and its shape is arbitrary.

FIG. 30 is a cross-sectional view of an essential part showing the structure of a further different conventional electromagnetic wave generator. In this configuration, the distributed constant line 21 is interposed between the fusible body 15 and the biconical antenna 27, and a patent application for this configuration has already been filed by the same applicant (Japanese Patent Laid-Open No. 7-922).
No. 14). In the distributed constant line 21, a cylindrical inner conductor 18 is arranged at the center, and a cylindrical outer conductor 19 is arranged on the outer periphery of the distributed constant line 21 via an insulator 20. The insulator 20 is generally a dielectric, and pure water is used in FIG.
The upper and lower sides thereof are sealed by insulating plugs 17 and 16. The lower end of the inner conductor 18 is joined to the metal cylinder 1, and the upper end thereof is joined to the upper side of the biconical antenna 27. On the other hand, the lower end of the outer conductor 19 is joined to the winding 3, and the upper end is joined to the lower side of the biconical antenna 27. Other configurations are the same as those in FIG. 28.

In FIG. 30, the distributed constant line 21 forms a distributed constant circuit like a cable over the section of the axial length T, and the voltage generated at both ends of the fusible body 15 propagates upward in the line. . Since the upper end of the distributed constant line 21 is terminated by the biconical antenna 27, it is the same as the open end of the distributed constant circuit. Therefore, the voltage propagating from the bottom is reflected by the terminating biconical antenna 27, and its voltage value is doubled. Since the biconical antenna 27 oscillates this doubled voltage as an electromagnetic wave, the electric field E formed in the surrounding space is about twice as high as in the case without the distributed constant line 21 (FIG. 28).

FIG. 31 is a cross-sectional view of an essential part showing the structure of a further different electromagnetic wave generator of the prior art. This configuration is shown in FIG.
A tuning coil 23 is interposed between a distributed constant line 21 of 0 and a biconical antenna 27, and a patent application for this configuration is also filed by the same applicant as the present invention (Japanese Patent Laid-Open No. 7-92214). Issue). An insulating cylinder 22 is fixed to the upper part of the inner conductor 18, and a tuning coil 23 is wound around the insulating cylinder 22. The lower end of the tuning coil 23 is connected to the internal conductor 18, and the upper end thereof is connected to the upper side of the biconical antenna 27. Other configurations are the same as those in FIG.

In FIG. 31, if the tuning coil 23 is adjusted so as to resonate at the frequency of the electromagnetic wave to be oscillated by the biconical antenna 27, when the electric field E formed in the surrounding space is not provided by the tuning coil 23 ( It can be higher than that of FIG. 30). FIG. 32 is a cross-sectional view of an essential part showing the structure of a further different conventional electromagnetic wave generator. A patent application for this configuration has already been filed by the same applicant as the present invention (Japanese Patent Laid-Open No. 6-138192), and the cylindrical short-circuit conductor 1 is provided above the metal cylinder 1 via the gap 138.
37, and another disk-shaped short-circuit conductor 1
36 is conductively connected between the winding 3 and the short-circuit conductor 137. Further, the ring-shaped iron core 133 is wound around the short-circuit conductor 137. The secondary winding 134 winds the iron core 133,
The transformer 135 is formed with the short-circuit conductor 137.
Further, both ends of the secondary winding 134 are connected to the feeding terminal 141 of the dipole antenna 140 via the penetration terminals 142. The dipole antenna 140 is the insulator 1.
It is fixed to the end of the device via 39. Other configurations are the same as those in FIG. 28.

FIG. 33 is an equivalent circuit diagram of the device shown in FIG. The current source 145 is the lower part of the device not shown in FIG. 32, and collectively shows the current sources flowing from the winding 3 by the explosion. The output end of the current source 145 is connected to the inductance 143 of the metal cylinder 1 and the winding 3.
It is connected to both ends of the fusible body 15 via. Soluble body 1
Both ends of 5 are connected to a short-circuit conductor 137, which is the primary winding of the transformer 135, through a closing switch formed of a gap 138. Both ends of the secondary winding 134 of the transformer 135 are connected to the dipole antenna 140.

FIG. 34 shows the current generated in the device of FIG.
It is a time chart which shows the waveform of a voltage and an electric field. The upper waveforms 146A and 146B show current waveforms flowing through the fusible body 15 and the short-circuit conductor 137, respectively. Further, the middle waveforms 147A and 147B show voltage waveforms generated at both ends of the fusible body 15 and the secondary winding 134, respectively. Further, the lower waveform 148B is a waveform of an electric field formed around the dipole antenna 140 by oscillating an electromagnetic wave.

[0020] In FIG. 34, the explosion occurs at time t _1, the waveform 146A until time t ₂ are those formed by the resistance increase of the fuse element 15 as described with reference to FIG. 28. Gap 138 is set to cause dielectric breakdown by the voltage applied to the gap at time t ₂ . Therefore, a current such as a waveform 146B starts to flow in the short-circuit conductor 137 from time t ₂ , and this current induces a voltage (waveform 147B) in the secondary winding 134. The induced voltage causes the dipole antenna 140 to oscillate an electromagnetic wave. By adjusting the number of turns of the secondary winding 134, it is possible to change the resonance frequency of the circuit, increase the induced voltage, and increase the electric field of electromagnetic waves.

[0021]

However, the conventional device as described above has a problem that the frequency of the electric field generated by the electromagnetic waves is low. That is, the frequency of the electromagnetic wave generated by the conventional device was on the order of several hundred kHz, and was at most about 1 MHz. In the noise resistance test of electronic equipment, in order to improve reliability, 100MHz
It is necessary to verify that it withstands high-frequency electromagnetic waves called orders. There is also a demand for reducing the size and cost of the device by allowing the electromagnetic wave generation device to generate as strong an electromagnetic wave as possible.

An object of the present invention is to increase the frequency and electric field of generated electromagnetic waves.

[0023]

In order to achieve the above object, according to the present invention, a metal cylinder having an explosive charged therein and a shaft while forming a cylindrical void portion outside the metal cylinder are provided. Connected between the winding that is wound in the direction, the detonator that is inserted into one end of the metal cylinder so as to contact the explosive, and the end of the metal cylinder and the detonator side of the winding. It is composed of a current source, a metal cylinder and a fusible body connected between the ends of the winding on the side of the anti-detonator, and antennas connected to both ends of the fusible body. In the one that explodes the explosive in the flowing state and amplifies the current flowing in the winding to generate electromagnetic waves in the surroundings,
The antenna is preferably connected to the fusible body via a closing switch.

Alternatively, in such a structure, the fusible body is arranged along the inner side of the end surface of the metal cylinder opposite to the detonator,
Of the explosives loaded inside the metal cylinder, the explosive on the side of the detonator is formed in two parts, and the explosive loaded along the inner peripheral wall of the metal cylinder is loaded in the core part of the metal cylinder. The explosive may be compounded so that the detonation wave has a lower propagation speed.

Alternatively, in such a structure, a double line composed of an intermediate conductor arranged on the outer periphery of the central conductor with a gap and an outer conductor arranged on the outer periphery of the intermediate conductor with a gap further is provided. The center conductor and the intermediate conductor are conductively connected to each other on the detonator side, the center conductor and the outer conductor are conductively connected to each other on the anti-detonator side, and the detonator side of the center conductor is a metal cylinder through a closing switch. Opposite to the center conductor, the anti-detonator side of the center conductor is connected to one terminal of the antenna, the detonator side of the outer conductor is connected to the winding, and the anti-detonator side of the intermediate conductor is connected to the other terminal of the antenna. It may be composed of

Alternatively, in such a structure, a double line composed of an intermediate conductor arranged on the outer periphery of the center conductor with a gap and an outer conductor arranged on the outer periphery of the intermediate conductor with a gap further A plurality of first to Nth conductors are provided, the central conductor and the intermediate conductor of each double line are conductively connected to each other on the detonator side, and the center conductor and the outer conductor of each double line are on the anti-detonator side. Conductively connected to each other, the initiator side of each center conductor is connected to the winding, and the initiator side of each outer conductor faces the metal cylinder through the closing switch, and the middle conductor of the first double line is connected. The anti-detonator side is connected to one terminal of the antenna, the anti-detonator side of the center conductor of the first double line is connected to the anti-detonator side of the intermediate conductor of the second double line, and the second The anti-detonator side of the center conductor of the double line of It is connected to the anti-detonator side of the intermediate conductor of the n-th double line, and is similarly connected up to the N-th double line, and the anti-detonator side of the center conductor of the N-th double line is the other side of the antenna. It may be connected to the terminal of.

Alternatively, in such a structure, the surface of the antenna may be covered with an insulator.

[0028]

According to the structure of the present invention, the antenna is connected to the fusible body through the closing switch. If the closing switch is closed when the voltage applied to both ends of the fusible body rises, a steep voltage is applied to the antenna when the closing switch operates, and a high-frequency electromagnetic wave with a short rise is generated.

Further, in such a structure, the fusible body is arranged along the inner side of the end surface of the metal cylinder on the side opposite to the detonator.
Of the explosives loaded inside the metal cylinder, the explosive on the side of the detonator is formed in two parts, and the explosive loaded along the inner peripheral wall of the metal cylinder is loaded in the core part of the metal cylinder. It is compounded so that the propagation speed of detonation wave is smaller than that of the explosive. As a result, when the explosion progresses and approaches the end of the anti-detonator of the metal cylinder, the detonation wave advances at the core portion of the metal cylinder and delays at the inner wall side portion of the metal cylinder. Therefore, the fusible body is crimped by the detonation wave before the entire gap between the metal cylinder and the winding is bombed, and the resistance of the fusible body increases. As a result, when the fusible body is pressure-bonded with an explosive, another detonator, which has been separately required, is unnecessary.

Further, in such a structure, a double line composed of an intermediate conductor arranged on the outer periphery of the center conductor with a gap and an outer conductor arranged on the outer periphery of this intermediate conductor with a gap further It is provided. When the closing switch is activated, current flows through the center conductor and the outer conductor. The magnetic flux formed by this electric current induces the intermediate conductor, and the potential of the intermediate conductor on the side of the detonator is instantaneously increased. Since this potential is transmitted to the antenna, the electromagnetic wave generated from the antenna is strengthened and the electric field is increased.

Further, in such a structure, a double line composed of an intermediate conductor arranged on the outer periphery of the central conductor with a gap and an outer conductor arranged on the outer periphery of the intermediate conductor with a gap further A plurality of first to N-th units are provided. When the closing switch is activated, current flows through the center conductor and the outer conductor of each double line. The magnetic flux formed by this current induces each intermediate conductor to
The potential on the anti-detonator side of the intermediate conductor momentarily rises. Since N potentials of the respective intermediate conductors are superimposed and transmitted by the antenna, the electromagnetic wave generated from the antenna is further strengthened and the electric field is increased. The electric field increases as the number N of double lines increases.

In this structure, the surface of the antenna is covered with the insulator. As a result, the resonance frequency does not change even if the size of the antenna is reduced, so that the device can be downsized.

[0033]

EXAMPLES The present invention will be described below based on examples. FIG. 1 is a cross-sectional view of essential parts showing the configuration of an electromagnetic wave generator according to an embodiment of the present invention. A conductor tube 26 is provided on the upper side of the biconical antenna 27.
Are attached to the upper end of the winding 3 via a ring-shaped insulating support 25. A counter electrode 33 is attached to the lower end surface of the conductor tube 26. On the other hand, the metal cylinder 24
The upper end surface of the is covered with a sharp metal part 24A, and the gap 36
It opposes the counter electrode 33 through. Others are shown in Figure 2.
8 is the same as the conventional configuration. The same parts as those of the related art are designated by the same reference numerals, and detailed description thereof will not be repeated here.

FIG. 2 is a time chart showing the waveforms of the current, voltage and electric field generated in the device of FIG. 1 in comparison with the case of the conventional device of FIG. The top is the current waveform,
Waveforms 34I and 35I show the waveforms of the current I flowing through the fusible member 15 in FIGS. 1 and 28, respectively. Further, the middle stage is a voltage waveform, and the waveforms 34V and 35V are respectively shown in FIGS.
8 shows a waveform of the voltage V generated between the eight biconical antennas 27. Further, the lower part is the electric field waveform, and the waveform 34
E and 35E are the waveforms of the electric field which the biconical antenna 27 of FIGS. 1 and 28 oscillates an electromagnetic wave to form in the surroundings.

In the upper and middle waveforms of FIG. 34,
Tick t₁Explosion occurred at time t _ThreeThe roaring wave is gold
It shows that the upper end of the metal cylinder is reached. gap
When there is no 36 (Fig. 28), the waveforms 35I and 35V are
Thus, the current I and the voltage V continue to increase. On the other hand, the gap 36
When there is (Fig. 1), time t₂Up to voltage V is
It does not occur between the cull antennas 27. But the gap
The voltage applied to 36 is time t₂Up to like a 35V waveform
Has become. Time t₂Causes gap 36 to breakdown
After that, the current I decreases a little like the current waveform 34I.
However, the voltage V across the biconical antenna 27 is a voltage waveform.
Suddenly rises like 34V. Lower electric field waveform 34
E and 35E are proportional to the voltage waveforms 34V and 35V, respectively
Waveform. Therefore, from the device of FIG.
Emitting electromagnetic waves of orders of magnitude higher than 28 conventional devices
Will come to life. That is, the time t₂From time t_ThreeMa
It takes several ns (100MHz),
At best, only 1MHz electromagnetic waves were emitted,
The electromagnetic wave with a frequency as high as two digits is emitted by the insertion of the top 36.
It became so.

The conventional device shown in FIG. 32 is also provided with the gap 138, and the frequency of the electromagnetic wave output as shown by the waveform 148 in FIG. 34 is slightly increased. But the gap 1
After the dielectric breakdown of 38, the current flowing through the short-circuit conductor 136 was converted into a high voltage by the transformer 135. Since the transformer 135 is provided on the output side, a large amount of inductance was introduced between the die ball antenna 140 and the gap 138, and the electromagnetic wave of 1 MHz or more was not output. The equivalent circuit of the device of FIG. 1 corresponds to the equivalent circuit of the conventional device of FIG. 33 in which the transformer 135 and the dipole antenna 140 are removed and the gap 138 is directly connected to the biconical antenna 27. As a result, the inductance on the side of the biconical antenna 27 was extremely reduced, and the rise of the generated voltage could be made steeper.

FIG. 3 is a cross-sectional view of essential parts showing the structure of an electromagnetic wave generator according to a different embodiment of the present invention. The helical antenna 30 is directly bonded to the counter electrode 33. Others are the same as the configuration of FIG. The other end of the helical antenna 30 is the upper end surface of the winding 3. FIG. 29
As described above, the shape of the antenna of the electromagnetic wave generator is generally arbitrary, and the dipole antenna 1 as shown in FIG.
It may be 40.

FIG. 4 is a sectional view of the essential parts showing the structure of an electromagnetic wave generator according to a further different embodiment of the present invention.
An explosive switch 47 is joined to the upper part of the metal cylinder 38, and the upper side of the biconical antenna 27 is attached to the explosive switch 47 via the conductor tube 37. 1 except that the gap 36 in FIG. 1 replaces the explosive switch 47.
The configuration is the same as that of.

FIG. 5 is an enlarged sectional view of the portion A of FIG. A cylindrical metal crimp portion 38A is conductively joined to the upper end of the metal cylinder 38, and an insulating pipe 39 is interposed between the crimp portion 38A and the conductor pipe 37. The explosive 4 in the metal cylinder 38 is loaded to the inside of the crimp portion 38A, and the upper portion is closed by the plug 40. The crimping portion 38A and the conductor tube 37 form a contact point of the explosive switch 47.

In FIG. 5, when the detonation wave propagating from the lower portion inside the metal cylinder 38 reaches the crimping portion 38A, the crimping portion 38A is pushed outward in the radial direction and crushes the insulating tube 39. As a result, the crimping portion 38A and the conductor tube 37 are bombarded and brought into conduction. Since the power of the detonation wave is strong, the contacts of the explosive switch 47 are closed instantly after the arrival of the detonation wave.
The explosive switch 47 is designed so that the voltage applied to the biconical antenna 27 rises sharply.

The gap 36 in FIG. 1 and the explosive switch 47 in FIG. 4 both act as closing switches so that the voltage applied to the antenna becomes steep. Therefore, these make-up switches are
The structure of the contact is arbitrary, as long as it is closed at the end of 4 or 38. FIG. 6 is a cross-sectional view of an essential part showing the configuration of an electromagnetic wave generator according to a further different embodiment of the present invention. A biconical antenna 27 is provided above the counter electrode 33 via the distributed constant line 21 having the same configuration as in FIG.
Is arranged. Others are the same as the configuration of FIG.
Since the distributed constant line 21 is interposed, the output electric field of the electromagnetic wave becomes higher than that of the device of FIG. 1 for the same reason as described in FIG.

FIG. 7 is a cross-sectional view of an essential part showing the structure of an electromagnetic wave generator according to a further different embodiment of the present invention. Between the helical antenna 30 and the counter electrode 33 shown in FIG.
A distributed constant line 21 having the same configuration as 0 is interposed. The lower part of the helical antenna 30 is joined to the metal stopper 41 fitted in the upper end of the distributed constant line 21. The configuration of FIG. 7 is different from that of FIG. 6 only in the shape of the antenna, and the output electric field of electromagnetic waves is higher than that of the device of FIG.

FIG. 8 is a characteristic diagram showing the electric field formed by the devices of FIGS. 6 and 7 as compared with the case of the device of FIG. The horizontal axis indicates the distance X away from the axis of the antenna in the radial direction, and the vertical axis indicates the electric field E just beside the antenna (radial direction) (the positions are shown in FIGS. 6 and 7). The plots are in the case of ◯ in FIG. 6, □ in FIG. 7, and x in FIG. 30, respectively. The plots ○ and □ have almost the same characteristics,
It is like a characteristic line 42. On the other hand, the downward arrow of the plot x at X = 2 m indicates that the generated electric field E was below that level (measurement could not be performed because the detection sensitivity was insufficient). Therefore, the characteristic of the plot x has at least a slope to the right lower than the characteristic line 43.

In FIG. 8, the distributed constant line 21 in the case of plots ◯ and □ has an axial length T of 50 c in FIG.
m, the outer diameter of the inner conductor is 4 cm, and the inner diameter of the outer conductor is 9 cm
It is. Further, the biconical antenna 27 in the case of plots ◯ and X has a diagonal peripheral wall length M of 25c in FIG.
m, the antenna gap length G is 6 cm, and the inclination angle α is 30 degrees. Furthermore, the helical antenna 3 in the case of plot □
0 is an outer diameter W of 25 cm and a coil pitch Y in FIG.
Is 15 cm and the number of turns is 2. As can be seen from FIG. 8, in the device (characteristic line 42) of FIGS. 6 and 7, compared with the conventional device of FIG. 30, the generated electric field E is less likely to decrease than the characteristic line 4 even if the distance X increases. There is. This is the gap 36
Since the frequency of the electromagnetic wave is increased by the insertion of the electromagnetic wave, it is shown that the electromagnetic wave can easily reach farther. Further, it can be seen that, in addition to the higher frequency of the electromagnetic wave, the level of the generated electric field E is also improved in the devices of FIGS. 6 and 7 as compared with the conventional device of FIG.

FIG. 9 is a cross-sectional view of essential parts showing the structure of an electromagnetic wave generator according to a further different embodiment of the present invention.
An explosive switch 47 is provided between the metal cylinder 38 and the distributed constant line 21. This configuration corresponds to the gap 3 in FIG.
The explosives switch 47 is attached instead of 6. Moreover, instead of the conductor tube 37 of FIG.
One inner conductor 18 is used. This configuration is also shown in FIG.
Similar to the device of FIG. 1, the output electric field of electromagnetic waves is higher than that of the device of FIG.

FIG. 10 is a cross-sectional view of an essential part showing the structure of an electromagnetic wave generator according to a further different embodiment of the present invention. FIG. 10 shows a configuration in which a tuning coil 23 that winds an insulating cylinder 22 is interposed between the distributed constant line 21 and the biconical antenna 27 in FIG. Tuning coil 23
31 has the same configuration as that of FIG. 31, and if it is adjusted so as to resonate with the frequency of the electromagnetic wave to be oscillated, the electric field generated by the electromagnetic wave becomes even higher than in the case of FIG. 9 without the tuning coil 23.

FIG. 11 is a cross-sectional view of an essential part showing the structure of an electromagnetic wave generator according to a further different embodiment of the present invention. An explosive 45 different from the explosive 4 is housed in the explosive container 46 around the fusible body 15. The detonator 44 is inserted from the right side so as to touch the explosive 45. Others are the same as the configuration of FIG. The configuration in which the fusible body 15 is embedded in the explosive 45 has already been filed by the same applicant as the present invention (Japanese Patent Laid-Open No. 7-92214).

In FIG. 11, when the fusible body 15 is melted by the current flowing from the winding 3 and turned into plasma, the detonator 44 is ignited to explode the explosive 45. The fusible body 15 turned into plasma is instantly compressed by the detonation wave. At that time, the amount of increase in the resistance of plasma per unit time becomes very large. This increase in resistance is several times larger than in the case of the meltable body 15 in the molten state. Therefore, a very high voltage is generated in the gap 36. Therefore, if the gap 36 is set so as to cause dielectric breakdown at a higher voltage than in the case of FIG. 10, a higher electric field can be formed than in the case of the device of FIG.

FIG. 12 is a cross-sectional view of essential parts showing the structure of an electromagnetic wave generator according to a further different embodiment of the present invention. A gap 48 is provided between the counter electrode 33 and the electrode 50. FIG. 13 is an enlarged cross-sectional view of part B of this device. In FIG. 13, the fusible body 54 is arranged along the inner side of the upper end surface of the metal cylinder 49. Also, the metal cylinder 4
The upper portion of 9 is closed by an insulating ring 53 and a conductive portion 56. The fusible body 54 has one end connected to the metal cylinder 49 and the other end connected to the conductive portion 56. The electrode 50 is joined to the conductive portion 56 via the insulating plate 51, and
It is connected to the metal cylinder 49 via a lead wire 52.
The lead wire 52 is drawn out to the metal cylinder 49 side while being insulated from the conductive portion 56 by the through terminal 90.
Further, among the explosives 4 loaded inside the metal cylinder 49, the explosive 4 in a portion whose upper side is along the inner wall of the metal cylinder 49.
It is formed in two parts, A and the explosive 4B of the core part. Explosive 4A is compounded so that the propagation speed of the detonation wave is smaller than that of explosive 4B.

In FIG. 13, the explosion progresses and the metal cylinder 4
When approaching the upper end of 9, the detonation wave has its tip advanced at the core of the metal cylinder 49, as shown by the dotted line 55, and behind the inner wall of the metal cylinder 49. Therefore, the fusible body 15 is pressure-bonded upward by the detonation wave before the entire gap between the metal cylinder 49 and the winding wire 3 is bombed, and the fusible body 1 is compressed.
The resistance value of 5 increases. The voltage applied across the fusible element 15 is
Since it is transmitted to the conductive portion 56 and the lead wire 52, the gap 4
Voltage is also applied to 8. The melting timing of the fusible body 15 can be adjusted by the difference in the propagation degree of the detonation wave in the metal cylinder 49. This eliminates the need for the detonator 44, which is required in the apparatus of FIG. 11, and has the advantage of facilitating the operation of the equipment.

FIG. 14 is a cross-sectional view of an essential part showing the structure of an electromagnetic wave generator according to a further different embodiment of the present invention. A cylindrical intermediate conductor Q coaxially arranged with a gap on the outer circumference of a cylindrical central conductor P, and a cylindrical outer conductor R coaxially arranged with a gap on the outer circumference of the intermediate conductor Q
A double line S constituted by and is provided. The central conductor P and the intermediate conductor Q have two lead wires 6 arranged in parallel at the bottom.
3, the center conductor P and the outer conductor R are conductively connected to each other via the conductive portion 70 at the upper part. The lower portion of the central conductor P faces the metal cylinder 1 via the gap 57, and the upper portion of the central conductor P is connected to the upper side of the biconical antenna 27. on the other hand,
The lower portion of the outer conductor R is connected to the winding 3, and the upper portion of the intermediate conductor Q is connected to the lower side of the biconical antenna 27. In addition, the upper portion of the intermediate conductor Q is insulated from the conductive portion 70 via the two through terminals 62 arranged in parallel and is pulled out upward. In FIG. 14, when the gap 57 operates, a current flows through the center conductor P and the outer conductor R. The magnetic flux formed by this current induces the intermediate conductor Q, and the potential on the upper side of the intermediate conductor Q instantaneously rises. Since this potential is transmitted to the biconical antenna 27, the generated electromagnetic wave becomes stronger and the electric field increases.

FIG. 15 is a time chart showing voltage waveforms and electric field waveforms generated from the device of FIG. 14 in comparison with the case of FIG. The horizontal axis represents time t, the upper vertical axis represents voltage, and the lower vertical axis represents electric field. Waveforms 65V and 65E are the voltage and electric field generated from the device of FIG. 14, respectively. On the other hand, the waveforms 34V and 34E are the voltage and electric field generated from the device of FIG. 1, respectively. At time t ₂ , the gap operates and at time t
_The voltage and electric field increase up to 3. It can be seen from FIG. 15 that the electromagnetic field generated by disposing the intermediate conductor Q has a higher electric field than in the case of FIG.

In FIG. 14, the center conductor P and the outer conductor R of the double line S are exchanged, and the lower portion of the outer conductor R is opposed to the metal cylinder 1 through the gap 57, and the center conductor P
You may connect the lower part of the to the winding 3. FIG. 16 is a cross-sectional view of essential parts showing the configuration of an electromagnetic wave generator according to a further different embodiment of the present invention. Distributed constant line 2 of the device of FIG.
In this configuration, a double line S is provided in place of 1 and the tuning coil 23. Since the fusible body 54 is pressure-bonded with the explosive 4B, the electromagnetic wave is stronger and the electric field is higher than in the device of FIG.

FIG. 17 is a cross-sectional view of the essential parts showing the structure of the electromagnetic wave generator according to a further different embodiment of the present invention. First double line S1 and second double line S2
And are arranged. Center conductor P of each double line S1, S2
1, P2 and outer conductors R1 and R2 are conductively connected to each other via conductive portions 67 at the upper part, and each double line S1,
The central conductors P1 and P2 of S2 and the intermediate conductors Q1 and Q2 are conductively connected to each other at their lower portions via conductive portions 68. The lower side of each of the central conductors P1 and P2 is connected to the winding 3, the outer conductors R1 and R2 are conductively connected to each other by an electrode 64 at the lower side, and the electrode 64 faces the metal cylinder 1 via a gap 57. The upper side of the intermediate conductor Q1 of the first double line S1 is connected to the lower side of the biconical antenna 27, and the upper side of the center conductor P1 of the first double line S1 is the second double line S2. It is connected to the upper side of the intermediate conductor Q2. The upper side of the center conductor P2 of the second double line S2 is connected to the upper side of the biconical antenna 27. The upper portions of the intermediate conductors Q1 and Q2 are insulated from the conductive portion 67 via the through terminal 69 and are drawn out upward.

FIG. 18 is a sectional view taken along line CC of FIG.
Double lines S1 and S2 are arranged parallel to each other on an upper portion of a cylindrical support insulator 13, center conductors P1 and P2 are cylindrical, and intermediate conductors Q1 and Q2 and outer conductors R1 and R2 are all cylindrical. . Note that the DD cross section of FIG. 18 corresponds to FIG. 19 is an equivalent circuit diagram of the device of FIG.
A current source 6 is connected to the fusible body 15 via the winding 3 and the metal cylinder 1. Both ends of the fusible body 15 are connected to the outer conductors R1 and R2 and the center conductors P1 and P2 via the gap 57. The right ends of the center conductors P1 and P2 are connected to each other, and the right end of the center conductor P2 is connected to the right side of the biconical antenna 27. On the other hand, the intermediate conductors Q1, Q
2, the left side is connected to the left ends of the center conductors P1 and P2, and the right end of the intermediate conductor Q1 is connected to the left side of the biconical antenna 27. Further, the right end of the intermediate conductor Q2 has a center conductor P
1 is connected to the right end.

In FIG. 19, the current flowing through the gap 57 is divided into I1 and I2 and divided into the central conductor P.
1 and P2. A voltage is induced in the intermediate conductors Q1 and Q2 by the magnetic flux formed by the currents I1 and I2, and the voltage V is applied between the central conductors P1 and P2 and the intermediate conductors Q1 and Q2.
1 and V2 are generated. The biconical antenna 27 has
Since the sum V1 + V2 of the voltages is applied, the electromagnetic wave becomes strong and the electric field increases. The voltage waveform 66V and electric field waveform 66E in FIG. 15 are for the device of FIG.
It can be seen that the generated electric field is higher than in the case of the device of No. 4.

FIG. 20 is a cross-sectional view of an essential part showing the structure of an electromagnetic wave generator according to a further different embodiment of the present invention. A first double line S1, a second double line S2, and a third double line S3 are arranged in parallel to each other on an upper portion of the cylindrical support insulator 13. Each double line S1,
The central conductors P1, P2, P3 of S2, S3 are columnar, intermediate conductors Q1, Q2, Q3 and outer conductors R1, R2, R3.
Are all cylindrical.

FIG. 21 is a sectional view taken along line FF of FIG.
The central conductors P1 and P2 and the outer conductors R1 and R2 of the double lines S1 and S2 are conductively connected to each other through the conductive portion 67 at the upper portion, and the central conductors P1 and P2 and the intermediate conductors of the double lines S1 and S2 are connected to each other. Q1 and Q2 are conductively connected to each other via a conductive portion 68 at the bottom. The lower side of each of the center conductors P1 and P2 is connected to the winding 3, each of the outer conductors R1 and R2 is conductively connected by an electrode 64 at the lower side, and the electrode 64 has a gap 57.
It faces the metal cylinder 1 through. The upper side of the intermediate conductor Q1 of the first double line S1 is connected to the lower side of the biconical antenna 27, and the upper side of the center conductor P1 of the first double line S1 is the second double line S2. It is connected to the upper side of the intermediate conductor Q2. Second double line S2
The upper side of the central conductor P2 is connected to the upper side of the intermediate conductor Q3 of the third double line S3 (not shown).
The upper portions of the intermediate conductors Q1 and Q2 are insulated from the conductive portion 67 via the through terminal 69 and are drawn out upward.

FIG. 22 is a sectional view taken along line GG of FIG.
The center conductors P2, P3 and the outer conductors R2, R3 of the double lines S2, S3 are conductively connected to each other via the conductive portion 67 at the upper part, and the center conductors P2, P3 and the intermediate conductors of the double lines S2, S3 are connected to each other. Q2 and Q3 are conductively connected to each other through a conductive portion 68 at the bottom. The lower side of each center conductor P2, P3 is connected to the winding 3, each outer conductor R2 and R3 is conductively connected by an electrode 64 at the bottom, and the electrode 64 has a gap 57.
It faces the metal cylinder 1 through. The upper side of the intermediate conductor Q2 of the second double line S2 is connected to the lower side of the biconical antenna 27, and the upper side of the center conductor P2 of the second double line S2 is the third double line S3. It is connected to the upper side of the intermediate conductor Q3. Third double line S3
The upper side of the center conductor P3 of the biconical antenna 27 is
Is connected to the upper side of. The intermediate conductors Q2 and Q3
The upper part of is insulated from the conductive portion 67 through the through terminal 69 and is drawn out upward.

FIG. 23 is an equivalent circuit diagram of the device of FIG. The current source 6 passes through the winding 3 and the metal cylinder 1 and the fusible body 15
It is connected to the. Both ends of the fusible body 15 have a gap 57.
Through the outer conductors R1, R2, R3 and the center conductor P
1, P2 and P3 are connected. Center conductors P1, P
The right ends of 2 and P3 are connected to each other, and the right end of the center conductor P3 is connected to the right side of the biconical antenna 27. On the other hand, the left ends of the intermediate conductors Q1, Q2, Q3 are connected to the left ends of the center conductors P1, P2, P3, and the intermediate conductor Q1
Is connected to the left side of the biconical antenna 27. Further, the right end of the intermediate conductor Q2 is connected to the right end of the center conductor P1, and the right end of the intermediate conductor Q3 is connected to the right end of the center conductor P2.

In FIG. 23, the current flowing through the gap 57 is divided into I1, I2 and I3 and flows into the central conductors P1, P2 and P3, respectively. These currents I1, I2
The magnetic flux formed by I3 causes the intermediate conductors Q1, Q2, Q3.
A voltage is induced in the central conductors P1, P2, P3 and the intermediate conductors Q1, Q2, Q3, and voltages V1, V2, V3, respectively.
Occurs. Since the sum V1 + V2 + V3 of this voltage is applied to the biconical antenna 27, the electromagnetic wave becomes stronger and the electric field increases.

Although FIG. 20 shows a case where there are three double lines, a plurality of N double lines can be used in the same manner. As the number of double lines increases, the electromagnetic wave becomes stronger and the electric field increases. In addition, Figure 1 with double line
4, In the configuration of the electromagnetic wave generator of FIG. 17 or FIG. 20, between the biconical antenna 27 and the double line,
It is also possible to adopt a configuration in which the distributed constant line 21 as shown in FIG. 6 is interposed. That is, in the configuration of FIG. 14 having one double line, between the biconical antenna 27 and the dual line S, in the configuration of FIG. In the configuration of FIG. 20 in which there are three double lines, the distributed constant line 21 is provided between the biconical antenna 27 and the third double line S3 and the double line S2.
Intervene. The distributed constant line 21 and the double line are connected to each other by connecting the lower end of the inner conductor 18 of the distributed constant line 21 and the upper end of the center conductor of the double line via a gap, and at the outside of the distributed constant line 21. The lower end of the conductor 19 and the upper end of the intermediate conductor of the double line are connected. Also,
The upper end of the inner conductor 18 of the distributed constant line 21 is connected to the upper side of the biconical antenna 27, and the upper end of the outer conductor 19 of the distributed constant line 21 is connected to the lower side of the biconical antenna 27. To do.

FIG. 24 is a cross-sectional view of essential parts showing the structure of an electromagnetic wave generator according to a further different embodiment of the present invention. The surface of the biconical antenna 27 is covered with an insulator 60. Others are the same as those in FIG. In general,
When the antenna is covered with insulation, its resonance frequency is lowered due to the dielectric constant of the insulator 60. Biconical antenna 2
Since the resonance frequency can be kept constant by reducing the size of 7, the device can be downsized.

FIG. 25 is a cross-sectional view of an essential part showing the structure of an electromagnetic wave generator according to a further different embodiment of the present invention. The surface of the biconical antenna 27 is covered with an insulator 60. Other than that, the configuration is the same as that of FIG. 6 and a distributed constant circuit is provided. As in the case of FIG. 24, the resonant frequency can be kept constant by reducing the size of the biconical antenna 27.
The device is downsized.

[0065]

As described above, according to the present invention, the antenna is connected to the fusible body through the closing switch. As a result, the rising edge is several ns (1
High-frequency electromagnetic waves of the order of 00 MHz) are generated, and it is possible to meet the demand for reliability evaluation tests of electronic devices. Since the frequency of the generated electromagnetic wave was increased, it was possible to form an electric field farther from the device, and it became possible to test even a tester with a large external shape. In addition, many test instruments can be implemented at one time, and the efficiency of the test is improved.

Further, in such a structure, among the explosives loaded inside the metal cylinder, the explosive on the side of the anti-detonator is formed in two parts, a part along the inner wall and a core part, and The explosive loaded in the part is compounded so that the propagation speed of the detonation wave is lower than that of the explosive loaded in the core part. As a result, the detonator, which was necessary until now, is no longer needed, and the advantage is that the equipment can be operated easily.

Further, in such a structure, a double line composed of an intermediate conductor arranged on the outer periphery of the center conductor with a gap and an outer conductor arranged on the outer periphery of the intermediate conductor with a gap further It is provided. As a result, the electromagnetic waves generated from the antenna are strengthened and the generated electric field can be increased, which enables downsizing of the device and reduction of equipment costs.

In addition, in such a structure, a plurality of double lines are provided. As a result, the electromagnetic wave generated from the antenna becomes stronger and the generated electric field can be made higher. As a result, the device is made smaller and the equipment cost is further reduced. Moreover, in such a configuration, the surface of the antenna is covered with an insulator. As a result, the size of the antenna can be reduced and the device can be downsized.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing the configuration of an electromagnetic wave generator according to an embodiment of the present invention.

2 is a time chart showing the waveforms of current, voltage and electric field generated in the device of FIG. 1 in comparison with those of the device of FIG.

FIG. 3 is a cross-sectional view of essential parts showing the configuration of an electromagnetic wave generator according to a different embodiment of the present invention.

FIG. 4 is a cross-sectional view of an essential part showing the configuration of an electromagnetic wave generator according to a further different embodiment of the present invention.

FIG. 5 is an enlarged sectional view of a part A in FIG. 4;

FIG. 6 is a cross-sectional view of an essential part showing the configuration of an electromagnetic wave generator according to a further different embodiment of the present invention.

FIG. 7 is a cross-sectional view of an essential part showing the configuration of an electromagnetic wave generator according to a further different embodiment of the present invention.

8 shows the electric field created by the device of FIGS. 6 and 7. FIG.
Characteristic diagram shown in comparison with the case of the device

FIG. 9 is a cross-sectional view of an essential part showing the configuration of an electromagnetic wave generator according to a further different embodiment of the present invention.

FIG. 10 is a sectional view of an essential part showing the configuration of an electromagnetic wave generator according to a further different embodiment of the present invention.

FIG. 11 is a cross-sectional view of essential parts showing the configuration of an electromagnetic wave generator according to a further different embodiment of the present invention.

FIG. 12 is a cross-sectional view of an essential part showing the configuration of an electromagnetic wave generator according to a further different embodiment of the present invention.

FIG. 13 is an enlarged cross-sectional view of part B of FIG.

FIG. 14 is a cross-sectional view of an essential part showing the configuration of an electromagnetic wave generator according to a further different embodiment of the present invention.

FIG. 15 is a voltage waveform generated from the device of FIGS. 14 and 17;
Time chart showing electric field waveforms compared to the case of Fig. 1.

FIG. 16 is a cross-sectional view of an essential part showing the configuration of an electromagnetic wave generator according to a further different embodiment of the present invention.

FIG. 17 is a cross-sectional view of an essential part showing the configuration of an electromagnetic wave generator according to a further different embodiment of the present invention.

18 is a cross-sectional view taken along the line CC of FIG.

19 is an equivalent circuit diagram of the device of FIG.

FIG. 20 is a cross-sectional view of an essential part showing the configuration of an electromagnetic wave generator according to a further different embodiment of the present invention.

21 is a sectional view taken along line FF of FIG. 20.

22 is a sectional view taken along line GG of FIG. 20.

23 is an equivalent circuit diagram of the device of FIG. 20.

FIG. 24 is a cross-sectional view of an essential part showing the configuration of an electromagnetic wave generator according to a further different embodiment of the present invention.

FIG. 25 is a cross-sectional view of an essential part showing the configuration of an electromagnetic wave generator according to a further different embodiment of the present invention.

FIG. 26 is a perspective view showing an operating principle of an electromagnetic wave generator using explosives, (A) showing a state before the operation and (B) showing a state during the operation.

FIG. 27 is a cross-sectional view showing the configuration of a conventional electromagnetic wave generator.

FIG. 28 is a cross-sectional view of essential parts showing the configuration of a different conventional electromagnetic wave generation device.

FIG. 29 is a perspective view showing a configuration example of an antenna of a different electromagnetic wave generation device.

FIG. 30 is a cross-sectional view of essential parts showing the configuration of a still further different electromagnetic wave generator.

FIG. 31 is a cross-sectional view of an essential part showing the configuration of a still further different electromagnetic wave generator.

FIG. 32 is a cross-sectional view of an essential part showing the configuration of a still further different electromagnetic wave generator.

33 is an equivalent circuit diagram of the device of FIG. 32.

34 is a time chart showing the waveforms of current, voltage, and electric field generated by the device of FIG. 32.

[Explanation of symbols]

1, 24, 49: metal cylinder, 2: void, 3: winding,
4,4A, 4B: Explosive, 15: Soluble body, 36,48,5
7: gap, 27: biconical antenna, 30: helical antenna, 5,44: detonator, 21: distributed constant line, 23: tuning coil, S, S1, S2, S3: double line, P, P1, P2 , P3: central conductor, Q, Q1, Q
2, Q3: intermediate conductor, R, R1, R2, R3: outer conductor, 60: insulator

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location H01Q 13/04 H03B 1/00 Z H03B 1/00 G01R 31/28 Z

Claims (5)

[Claims] 1. A metal cylinder having an explosive charged therein, a winding wound in the axial direction while forming a cylindrical void on the outside of the metal cylinder, and fitted into one end of the metal cylinder. Between the detonator arranged so as to come into contact with the explosive and the current source connected between the ends of the metal cylinder and the winding on the detonator side, and between the ends of the metal cylinder and the winding on the anti-detonator side. It consists of a fusible body connected to the antenna and an antenna connected to both ends of the fusible body.The explosive is detonated with the initial current flowing from the current source to the winding, and the current flowing in the winding is amplified. An electromagnetic wave generating device, wherein the antenna is connected to a fusible body through a closing switch in a device for generating an electromagnetic wave in the surroundings. 2. The anti-detonation device according to claim 1, wherein the fusible body is arranged along the inner side of the end face of the metal cylinder facing the anti-detonation device, and among the explosives loaded inside the metal cylinder. The explosive on the side is formed in two parts, so that the explosive loaded along the inner wall of the metal cylinder has a lower detonation velocity than the explosive loaded in the core of the metal cylinder. An electromagnetic wave generator characterized by being prepared. 3. The method according to claim 1, wherein
A double line composed of an intermediate conductor arranged on the outer circumference of the center conductor with a gap and an outer conductor arranged on the outer circumference of the middle conductor with a gap is provided. Are conductively connected to each other on the detonator side, and the center conductor and the outer conductor are conductively connected to each other on the anti-detonator side,
The detonator side of the center conductor faces the metal cylinder through the closing switch, the anti-detonator side of the center conductor is connected to one terminal of the antenna, the detonator side of the outer conductor is connected to the winding, and the intermediate conductor The anti-explosion device side is connected to the other terminal of the antenna. 4. The method according to claim 1, wherein
A plurality of double lines from the first conductor to the Nth conductor, which are composed of an intermediate conductor arranged on the outer periphery of the central conductor with a gap and an outer conductor arranged on the outer periphery of the intermediate conductor with a gap. The center conductor and the intermediate conductor of each double line are conductively connected to each other on the detonator side, and the center conductor and the outer conductor of each double line are conductively connected to each other on the anti-detonator side. The detonator side of is connected to the winding, the detonator side of each outer conductor faces the metal cylinder through the closing switch, and the detonator side of the intermediate conductor of the first double line is one terminal of the antenna. Connected to the anti-detonator side of the center conductor of the first double line, connected to the anti-detonator side of the middle conductor of the second double line, and the anti-detonator side of the center conductor of the second double line. The detonator side is the anti-detonator side of the intermediate conductor of the third double line Electromagnetic wave generation, characterized in that the anti-detonator side of the central conductor of the Nth double line is connected to the other terminal of the antenna. apparatus. 5. The electromagnetic wave generator according to claim 1, wherein the surface of the antenna is covered with an insulator.