Method of generating waves of the microwave range emitted in short pulses, and apparatus for generating waves of the microwave range emitted in short pulses

 

(57) Abstract:

The invention relates to techniques for microwave, namely, high-frequency pulsed microwave devices, such as radars. Wave of the microwave range emitted long pulses of microwave generator, distributed in the waveguide tube, into which is forced a given gas. After that, by irradiation of a particular zone in the tube by laser radiation from the laser light source convert part of the specified gas in the plasma. Wave microwave range does not extend beyond the plasma part of the specified gas and is reflected in it. Wave of the microwave range is divided in plasma parts, and as a result you can obtain the wave of the microwave range emitted in short pulses. The technical result of the invention: generation of short pulses of microwave radiation with a duration of no more than 10 NS. 3 S. and 7 C.p. f-crystals, 4 Il.

Background of the invention

1) the technical Field to which the invention relates

This invention relates to a method of generating waves of microwave frequencies (waves of the UHF-band) emitted in short pulses, and for generating waves of the microwave range emitted in short pulses, and more specifically to elephants microwave range, emitted in short pulses, preferably used in industry associated with the microwave oven, for example in high-frequency accelerator and high-frequency radar.

2) Description of prior art

In recent years, the industry associated with the microwave oven, for example in high-frequency accelerator and high-frequency radar, it is necessary that the wave of the UHF band radiates short pulses due to the high power output.

In the past, short radiation pulses was carried out by direct radiation of short voltage pulses applied to the microwave generator, and short radiation pulses of the electron beam for generating waves of the microwave range.

However, in the case of the above radiation of short voltage pulses applied to the generator of the microwave device, the required output circuit high voltage to create a low inductance. In addition, in the case of short radiation pulses of electron beam output power from the power source generating an electron beam, must radiate short pulses. Thus, in practice it is difficult to obtain the wave of the microwave range emitted from the Annex of the invention

The present invention is to develop a new way of generating waves of the microwave range emitted in short pulses, and a new apparatus for generating waves of the microwave range emitted in short pulses, which create a very simple obtain wave microwave range having a short pulse.

This invention relates to a method of generating waves of the microwave range emitted in short pulses, namely, that

pump the specified gas in the waveguide tube

propagate undamped harmonic wave of a microwave band or a wave of the microwave range emitted long pulses in the waveguide tube, and

carry out the conversion of part of a specified gas in a plasma by irradiating the tube in the direction of the cross-section of the laser radiation and separation thus continuous wave microwave range or wavelength of the microwave range emitted long pulses with plasma part of a specified gas to produce waves of the microwave range emitted in short pulses.

This invention relates to apparatus for generating waves of the microwave range emitted in short pulses, containing the different pulses, waveguide tube for the propagation of the microwave range emitted long pulses, and the laser light source for generating and emitting laser radiation for conversion into the plasma of a given gas injected into the waveguide tube.

The authors of the present invention conducted intensive studies with the aim of detecting a new way of generating waves of the microwave range emitted in short pulses, which replaces the traditional ways of generating waves of the microwave range emitted in short pulses. On the basis of the new approach in generating undamped harmonic wave of the microwave range or wavelength of the microwave range emitted long pulses, and the subsequent division of this wave of the microwave range with obtaining the wave of the microwave range emitted in short pulses, instead of directly generating waves of the microwave range emitted in short pulses, according to a known method, the authors attempted to radiate a wave of the UHF-band short pulse.

Therefore, the authors investigated and developed a way to separate the undamped harmonic wave of the microwave range or wavelength of the microwave range emitted long impulsation wave of the microwave range and converting the gas into plasma by irradiating the waveguide tube laser radiation outside can be divided continuous wave microwave band or a wave of the microwave range, the emitted long pulses.

That is, when the gas is pumped into the waveguide tube is converted into the plasma, the wave of the microwave range can not go beyond the plasma part and is reflected in this plasma. Thus there is a division continuous wave microwave range or wavelength of the microwave range emitted long pulses.

According to the present invention only by adjusting the intensities of the radiation waveguide tube laser radiation and changes in the magnitude of the plasma part of the gas in the waveguide tube can infinitely vary the number-divisor wave of the microwave range.

In this description, the phrase "continuous wave microwave range" means the so-called wave of the microwave range, which is a continuous wave, which has no pulse modulation in brightness and is generated continuously, and the wording "wave of the microwave range emitted long pulses" means the emitted pulse wave of the microwave range, with pulse duration of about 1000 nanoseconds.

Brief description of drawings

For a better understanding of the present invention below is his description with reference to the accompanying drawings, where

Fig. 2 - General view to illustrate another particular variant of the method of generating waves of the microwave range emitted in short pulses, corresponding to the present invention,

Fig.3 - wave profile microwave waves emitted in short pulses corresponding to the present invention,

Fig. 4 - wave profile other microwave waves emitted in short pulses corresponding to the present invention.

Description of preferred specific embodiments

Below is a detailed description of the invention.

As shown in Fig.1, apparatus 10 for generating waves of the microwave range emitted in short pulses, contains a microwave generator 1 for generating and emitting continuous wave microwave range or wavelength of the microwave range emitted long pulses, and a waveguide tube 2 for distribution continuous wave microwave range or wavelength of the microwave range emitted long pulses. In addition, the apparatus 10 includes an absorbing load 3 to absorb distributed continuous wave microwave range or wavelength of the microwave range, suc, Ognyanovo in the waveguide tube 2, through irradiation of a given gas by laser radiation.

In addition, the apparatus 10 includes a microwave detector 5 for detecting the separated wavelength of the microwave range and the valve 6 for the sustainable transfer of separated waves of the UHF-band microwave detector 5.

Given the gas pump in the waveguide tube 2 and then spreading continuous wave microwave range or wavelength of the microwave range emitted long pulses, the microwave generator in the receiver 2. Continuous wave microwave range or wave of the microwave range emitted long pulses, passes inside the tube 2 and is absorbed by the dummy load 3 when the specified gas in the tube is not converted into the plasma.

After that, during the propagation of the microwave range emitted long pulses is irradiated with laser radiation from the source 4 laser radiation two points - a and b - waveguide tube 2. Immediately after that part of the specified gas in the tube 2 into a plasma at points a and B. as a result, undamped harmonic wave of the microwave range or wave of the microwave range emitted long pulses, could not go beyond the points a and b in the tube 2 and is reflected at points a and B.

Wave of the microwave range emitted in short pulses, selected and contained in the right side of the tube 2 passes to the RF detector 5 through the valve 6 and is measured by the corresponding pulse duration, etc.

The pressure of the gas injected into the waveguide tube is not limited only if the plasma part of the gas formed by irradiation with laser light, divides the undamped harmonic wave of a microwave band or a wave of the microwave range emitted long pulses, receiving wavelength of the microwave range emitted in short pulses. However, this pressure is preferably of 0.133 to 4.0 kPa (1-30 Torr), more preferably 0,667-1,333 kPa (5-10 Torr).

Thus, even exposure to laser radiation having a relatively low intensity, can generate a plasma of high density in the tube and regardless of the material, the tube shape and the intensity and frequency of the undamped harmonic wave of the microwave range or wavelength of the microwave range emitted long pulses, it can easily be the wave of the microwave range emitted in short pulses.

In addition, the type of gas injected into volnovodnaya wave of the microwave range, radiate short pulses. For the same reason, which deals with the pressure of the gas can be used as a gas azulene or tetraacetylethylenediamine.

In particular, due to the easy access to the plasma using a favorable laser intensity and wavelength of the laser radiation, as described above, preferably, you can use tetraacetylethylenediamine.

The intensity of the laser radiation, which is irradiated with the waveguide tube, practically is not limited only if the plasma part of the gas formed by irradiation with laser light, divides the undamped harmonic wave of a microwave band or a wave of the microwave range emitted long pulses, receiving wavelength of the microwave range. radiate short pulses. However, the intensity is preferably 0.3 to 0.8 j/cm2.

Thus, regardless of the type of gas injected into the waveguide tube, the material and shape of the tube, as well as the frequency and intensity of distributed undamped harmonic wave of the microwave range or wavelength of the microwave range emitted long pulses, the gas is converted into plasma by receiving waves of the microwave range, islamico in case if you can get a wave of the microwave range emitted in short pulses, as described above. However, when the wavelength becomes shorter, the wave of the microwave range emitted in short pulses, tend to have a shorter pulse. In addition, when it becomes shorter than 248 nm that is the wavelength're affected excimer laser, the wave of the microwave range emitted from the short pulse has a shorter pulse so that you can easily get a wave of the microwave range emitted in short pulses.

In addition, the laser light that has a wavelength in the above range and which irradiate the gas is pumped into the waveguide tube may increase the plasma density in the gas and to create a sufficient amount of plasma gas.

As examples, the radiation source capable of emitting laser light having the above-mentioned density and wavelength, it is possible to use laser yttrium aluminium garnet (YAG laser and excimer laser. Since the YAG laser has a length of emitted wavelength of 1060 nm, using a YAG laser is used, the fourth harmonic of YAG laser.

In depicted in Fig.1 the apparatus for generated is a, emitted in short pulses, is divided into two parts at the points a and B. However, the number of divisor wave of the microwave range has no specific limitation, and can be selected appropriately depending on the required duration of the pulses in the wave of the microwave range emitted in short pulses.

According to the aforementioned method of generating corresponding to the present invention, it is possible to obtain the wave of the microwave range emitted in short pulses having a pulse duration of 2-10 nanoseconds.

Fig. 2 depicts a General view illustrating another particular variant of the method of generating waves of the microwave range emitted in short pulses, in accordance with the present invention. Here, parts similar to those shown in Fig.1, are denoted by the same positions.

Is depicted in Fig.2, the apparatus 20 for generating waves of the microwave range emitted from the short pulse has a microwave generator 1 and the source 4 of the laser radiation, and the apparatus 10 for generating depicted in Fig. 1. In addition, the apparatus 20 has a first waveguide tube 12 and the second waveguide tube 14. In addition, the apparatus 20 has a circulator 13 instead of on the ptx2">

Continuous wave microwave range or wave of the microwave range emitted long pulses of the microwave generator 1, is held in the first tube 12 and through the circulator 13, and the second tube 14. Then the laser light source 4 laser radiation irradiates the point a in the first tube 12 and the point In the second tube 15 and creates a plasma from the gases pumped into the tubes in the respective points a and B. Immediately thereafter, as explained in the example shown in Fig.1, the wave of the microwave range is divided at the points a and b with obtaining several waves of the microwave range emitted in short pulses.

In particular, the wave of the microwave range emitted in short pulses and prior in time to the waves of the microwave range emitted from the short pulse is split and is generated at the point In the second waveguide tube, that is the wave of the microwave range emitted in short pulses and on the left side from a point In the second waveguide tube 14, enters the dual waveguide tee 15 through the phase shifter 16. Delayed in time wave of the microwave range emitted in short pulses, that is the wave of the microwave range emitted in short pulses and on the right side from a point In the tube 14, p is s ' between the first tube 12 and second tube 14, without returning to the first tube 12.

Then the previous and the delayed wave of the microwave range emitted in short pulses that are synchronized in phase by the phase shifter 16 and superimposed on each double waveguide tee 15. Consequently, it is possible to simultaneously provide a short radiation pulse wave microwave from the microwave generator and, in fact, a twofold increase in the intensity amplitude of the wave of the microwave range.

That is, by using a shown in Fig.2 apparatus for generating waves of the microwave range emitted in short pulses, it is possible to simultaneously carry out short radiation pulse wave of the microwave range and increase power output.

Here it should be noted that in the shown in Fig.2, the apparatus 20 to generate, you can use the gas pressure and other parameters similar to the parameters of the apparatus 10 to generate.

Examples

This invention is specifically described in the following examples, but is not limited to them.

Example 1

In this example, the wave of the microwave range radiates short pulses using a shown in Fig. 1 apparatus 10 for generating waves of the microwave range. the bat is the capacity of 5 mW; frequency 9 GHz). As the waveguide tube used rectangular waveguide, designed for a capacity of 10 j (MVP 10). Source 4 laser radiation used for the fourth harmonic (wavelength: 266 nm) of YAG laser (output power 160 MJ; pulse duration 6 NS). As absorbing load 3, the microwave detector 5 and the valve 6 was applied industrial supply constructive elements.

After discharge tetraacetylethylenediamine (TMAA) in the waveguide tube 2 until the pressure 1,3310-3PA (10 millitorr), were irradiated tube 2 laser radiation having an intensity of 0.5 j/cm2from source 4 laser radiation and as a result, part of TMAE converted into a plasma.

Then the investigation of wave profile wave of the microwave range with microwave detector 5 is obtained, as shown in Fig.3. This result gives the wave of the microwave range, the pulse duration of which is about 4 nanoseconds. Thus, it is shown that the wave of the microwave range, with pulse duration of 6 NS, by emitting short pulses are converted into wave microwave range having a pulse duration of 4 NS.

Example 2

As the microwave generator 1, source 4 laser radiation, the first and second waveguide tubes 12, 14 in this example used the same structural elements as in example 1. In addition, as a circulator 13, dual waveguide tee 15 and the phase shifter 16 applied industrial supply constructive elements.

TMAE was introduced in the first and second waveguide tubes 12 and 14 in the same way as in example 1, and then spread the emitted wave microwave range in the first tube 12 and second tube 14. After it was illuminated for the first tube 12 and second tube 14 by laser radiation in the same way as in example 1.

In the study of wave profile wave microwave range using dual waveguide tee 15 found the result, shown in Fig.4. That is the wave of the microwave range is divided into two waves of the microwave range, with pulse 1 pulse duration of 4 NS) and pulse 2 pulse duration of 4 NS), respectively, at the point In the second waveguide tube 14, which were distributed in D. the output power and wavelength of the microwave range increases simultaneously with radiation of a wavelength of the microwave range short pulses.

Although the present invention is described with reference to the above examples, this invention is not limited to the above description, and within the scope of the claims of the present invention there may be any changes or modifications. For example, apparatus for generating may have three or more waveguide tubes that have circulators in each connecting part between them. Apparatus for generating may produce greater output power than the output power of the apparatus shown in Fig.2.

Method of generating and apparatus for generating corresponding to the present invention, provide separation of the wave of the microwave range by taking into account the natural advantages, namely, that the wave of the microwave range may not be in the waveguide tube outside the plasma part, formed by generating plasma of the gas in the tube by irradiation with laser radiation. So you can easily radiate the wave of the UHF-band short pulse regardless of the electrical circuit.

In addition, in accordance with the present invention can increase the output power of the wavelength of the microwave range emitted in short pulses, while the s short pulses.

1. Method of generating waves of the microwave range emitted in short pulses, namely, that pump the specified gas in the waveguide tube, spread continuous wave microwave band or a wave of the microwave range emitted long pulses in the waveguide tube, and carry out the conversion of part of a specified gas in a plasma by irradiating the tube in the direction of the cross-section of the laser radiation and separation thus continuous wave microwave range or wavelength of the microwave range emitted long pulses with plasma part of a specified gas to produce waves of the microwave range emitted in short pulses.

2. Method of generating waves of the microwave range emitted in short pulses, p. 1, wherein the predetermined gas is injected in the waveguide tube to a pressure of 0.133 to 4.0 kPa (1-30 Torr).

3. Method of generating waves of the microwave range emitted in short pulses, under item 1 or 2, characterized in that as the discharge gas pump tetraacetylethylenediamine.

4. Method of generating waves of the microwave range emitted in short pulses according to any one of paragraphs.1-3, characterized in that the tube is irradiated with laser radiation the short pulses, according to any one of paragraphs.1-4, characterized in that the tube is irradiated by laser radiation with a wavelength of not more than 248 nanometers.

6. Method of generating waves of the microwave range emitted in short pulses according to any one of paragraphs. 1-5, characterized in that the spreading wave of the microwave range emitted in short pulses, with pulse duration of 2 to 10 NS.

7. Method of generating waves of the microwave range emitted in short pulses according to any one of paragraphs.1-6, characterized in that the continuous wave microwave band or a wave of the microwave range emitted long pulses, divided into several waves of the microwave range emitted in short pulses, and impose on each other, these waves of the microwave range emitted in short pulses.

8. Method of generating waves of the microwave range emitted in short pulses, under item 7, characterized in that the waveguide tube consists of the first waveguide tube and the second waveguide tube, which is connected to the circulator, as part of a specified gas, pumped into the first and second waveguide tube, is converted into a plasma by irradiating the first and second waveguide tubes in the direction of their transverse cross sections of laser radiation, with independent the parts of a given gas in the tubes for a few waves of microwave frequency range, emitted in short pulses, which are separated by the circulator, and then impose on each other these few waves in the microwave range emitted in short pulses.

9. Apparatus for generating waves of the microwave range emitted from the short pulse containing a microwave generator for generating a continuous wave microwave range or wavelength of the microwave range emitted long pulses, the waveguide tube to distribute continuous wave microwave range or wavelength of the microwave range emitted long pulses, and the laser light source for generating and emitting laser radiation for conversion into the plasma of a given gas injected into the waveguide tube.

10. Apparatus for generating waves of the microwave range emitted from the short pulse containing a microwave generator for generating a continuous wave microwave range or wavelength of the microwave range emitted long pulses, the first and second waveguide tube for distributing continuous wave microwave range or wavelength of the microwave range emitted long pulses, and the laser light source for generating and emitting laser radiation for conversion in the plasma is given the

 

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