Method for reduction of duration of microwave emission pulse, and device for its implementation

FIELD: radio engineering, communication.

SUBSTANCE: microwave emission pulse is introduced to a waveguide section with gas-discharge lamps; glow discharges are lit in gas-discharge lamps by means of a pulse voltage generator, which leads to formation of a electromagnetic band structure. A device for reduction of duration of a microwave emission signal includes a waveguide section with five gas-discharge lamps, which is connected with one of its sides through a coaxial-waveguide transition and a ferrite valve to microwave generator output, and with the other side through a coaxial-waveguide transition and ferrite valve to a microwave detector; five gas-discharge lamps are located along the waveguide section perpendicular to its wide walls at interval l=Λ0/2÷Λ0, where Λ00(1-(λ0/2a)2)-1/2 - waveguide wave length, λ0 - length of incident microwave emission wave; a - size of wide wall of the waveguide section, and they are connected to the pulse voltage generator that is connected to the pulse generator output, the output of the synchronisation pulse of which is connected to the microwave generator.

EFFECT: reduction of duration of microwave pulses from tens of microseconds to tens of nanoseconds.

2 cl, 2 dwg

 

The invention relates to the field of microwave waveguide technology and can be applied in radar technology.

The known method and device for the formation of a powerful short microwave pulses [1], including the excitation of low-power microwave signal, amplification and modulation of the microwave signal, the selection signal with the frequency of the carrier oscillation ƒ0and the phase φ0producing band frequency and/or phase filtering the modulated microwave signal, then amplify the received signal and re-filtered, effecting selection of powerful signal with the frequency of the carrier oscillation ƒ0and the phase φ0.

Most bliskie the technical nature of the claimed invention are the method and apparatus of generating waves of the microwave range emitted in short pulses [2]. The method consists in the formation of short pulses of microwave radiation from a continuous (or long pulses of ~ 1000 NS) by firing laser plasma formation in the waveguide section, filled with a certain gas at low pressure (1-30 Torr), which causes total reflection of the incident microwave radiation and, accordingly, the interruption of the passing wave microwave. The disadvantage of this device is that the filling section of the waveguide gas at low pressure reduces (waveguide) breakdown strength for plasma ignition IP is alzueta laser radiation.

The objective of the invention is the reduction in the duration of the microwave pulses from tens of microseconds to tens of nanoseconds.

The way to shorten the duration of a pulse of microwave radiation, in which a pulse of microwave radiation is slid in the waveguide section with discharge lamps, with the help of the generator of the pulse voltage in the discharge lamp lighting glow discharges, which leads to the formation of electromagnetic band structure and to a narrowing of the passing pulse microwave, the delay between the front edge of a pulse of microwave and the moment of ignition of gas discharge lamps determines the duration of the generated pulse, and the power of the incident microwave radiation does not exceed required for microwave breakdown in the discharge lamp.

The way to shorten the duration of a pulse of microwave radiation is implemented using the device.

Device to shorten the duration of a pulse of microwave radiation, containing waveguide section with five gas discharge lamps, one side through a coaxial-waveguide transition and ferrite gate connected to the output of the microwave generator, and the other side through the coaxial-waveguide transition and ferrite valve to a microwave detector, five gas discharge lamps are located along the waveguide section perpendicular to its wide walls with period l=Λ0/2÷Λ0where Λ00 (1-(λ0/2A)2)-1/2the wavelength in the waveguide, λ0- the wavelength of the incident microwave radiation; and - the size of the broad wall of the waveguide section, and is connected to the high-voltage impulse generator, which is connected to the output of the pulse generator, the output pulse of which is connected to the microwave generator.

The essence of the device is illustrated by figure 1, where:

1 waveguide section,

2 - coaxial-waveguide transition,

3 - ferrite valve

4 - microwave generator,

5 is a microwave detector,

6 - pulse voltage generator,

7 - pulser,

8 is a discharge lamp.

According to the invention the output of the microwave generator 4 through the valve 3 and the coaxial-waveguide transition 2 is connected to the waveguide section 1. The microwave signal from the waveguide sections 1 through another coaxial-waveguide transition 2 and the valve 3 is fed to the microwave detector 5. Gas-discharge lamps 8 are installed along the waveguide section on its axis perpendicular to the broad walls with period l=Λ0/2÷Λ0where Λ00(1-(λ0/2A)2)-1/2the wavelength in the waveguide, λ0- the wavelength of the incident microwave radiation; and - the size of the broad wall of the waveguide section and connected to the pulse generator voltage (cathode discharge lamps to the minus high-voltage impulse generator and the anodes to the positive). Generate the R pulses 7 output connected to the pulse voltage generator 6 and the output of sync - to a microwave generator 4.

The device operates as follows.

The sync pulse of the pulse generator 7 starts the microwave generator 4, the microwave radiation from the microwave generator 4 is fed into the waveguide section 1, it is logged and microwave detector 5. The signal of the pulse generator 7 with a delay launches pulse voltage generator 6, which in the discharge lamp 8 is lit glow discharges that form the electromagnetic band structure with a Smoking area, which leads to the cutoff of the incident microwave signal and, accordingly, reduce the pulse duration time equal to the delay between the leading edge of the microwave pulse and the moment of ignition of the lamps.

In the practical implementation of the model was used rectangular waveguide section 23×10 mm2,with a length of about 50 cm and the incident microwave radiation with a wavelength in air λ0=33 mm Five discharge lamps GSH-5 (length about 20 cm, inner diameter 3 mm, filled with neon at a pressure of 70 mm RT. Art.) is perpendicular to the broad walls of the waveguide section in the holes of 4 mm diameter is drilled at a distance of l=38 mm from each other in the middle of a large wall that corresponds to the range l=Λ0/2÷Λ0=24÷48 mm When turning on the generator 7 is activated microwave generator 4 (figure 2, curve 1 is the incident pulse) and with some delay the first pulse voltage generator 6, in the discharge lamp 8 arise plasma columns, which leads to the formation of electromagnetic band structure with a gap bandwidth [3], which reduces the transmittance of the waveguide section at the frequency of the incident radiation at 50-60 dB, and the duration of the last pulse of the microwave is reduced to the time delay between the signal and sync pulse generator 7 (figure 2, curves 2, 3, 4 - the last pulses of microwave delays 7, 3 μs and 50 NS, respectively).

The use of the method and device allows you to continuously reduce the duration of the pulses of microwave radiation from tens of microseconds to tens of nanoseconds.

Sources of information

1. EN 2210857.

2. EN 2188500.

3. Control of electromagnetic band gap devices by discharge plasmas / V.I. Arkhipenko [et al.] // Proceedings of the VIII International Workshop on Microwave Discharges: Fundamentals and Applications (MD-8), Zvenigorod, Russia, 10-14 September 2012 / Sci. Council of RAS on Physics of Low Temperature Plasma; ed. Yu.A. Lebedev. - Moscow: Yanus-K, 2012. - P. 275-280.

1. The way to shorten the duration of a pulse of microwave radiation, in which a pulse of microwave radiation is slid in the waveguide section of the discharge lamp characterized in that with the help of the generator of the pulse voltage in the discharge lamp lighting glow discharges, which leads to the formation of electromagnetic band structure and to a narrowing of the passing pulse microwave, the delay between the front edge of a pulse of microwave and the PTO is that ignition of gas discharge lamps determines the duration of the generated pulse, while the power of the incident microwave radiation does not exceed required for microwave breakdown in the discharge lamp.

2. Device to shorten the duration of a pulse of microwave radiation by the method according to claim 1, containing waveguide section with five gas discharge lamps, one side through a coaxial-waveguide transition and ferrite gate connected to the output of the microwave generator, and the other side through the coaxial-waveguide transition and ferrite valve to a microwave detector, characterized in that the five discharge lamps are located along the waveguide section perpendicular to its wide walls with period l=Λ0/2÷Λ0,where Λ00(1-0/2a)2)-1/2the wavelength in the waveguide, λ0- the wavelength of the incident microwave radiation;and- size of the broad wall of the waveguide section, and is connected to the high-voltage impulse generator, which is connected to the output of the pulse generator, the output pulse of which is connected to the microwave generator.



 

Same patents:

FIELD: electricity.

SUBSTANCE: method for pulse length reduction of powerful SHF radiation and method for its implementation is characterised by introduction of SHF pulses into waveguide section with gas-filled tubes, under influence of downward powerful SHF radiation SHF-discharges are excited in the gas-filled tubes thus leading to formation of an electromagnetic band structure and pulse narrowing. The device for pulse length reduction of powerful SHF radiation contains a waveguide section with three gas-filled tubes connected by its one end through a coaxial transition and ferrite isolator to SHF-generator and by its other end through a coaxial transition and ferrite isolator to SHF-detector, the three gas-filled tubes are placed along the waveguide section perpendicular to its wide walls with distance l=Λ0/2÷Λ0, where Λ00(1-(λ0/2a)2)-1/2 is wave length in the waveguide, λ0 is wave length of downward SHF-radiation; a is a size of the wide wall in the waveguide section.

EFFECT: reducing length of microsecond pulse of powerful SHF radiation up to 10 ns and less.

2 cl, 2 dwg

The invention relates to the field of weapons, particularly artillery managed shells with laser homing head

The invention relates to techniques for microwave, namely, high-frequency pulsed microwave devices, such as radars

Deploying converter // 2153764
The invention relates to the field of automation and can be used for control of technological processes

The pulse extender // 2137293
The invention relates to a pulse technique

The invention relates to switching devices and may find application in systems management, monitoring, measuring, computing devices, communication devices in different industries

The invention relates to the field of pulse technique

FIELD: electricity.

SUBSTANCE: method for pulse length reduction of powerful SHF radiation and method for its implementation is characterised by introduction of SHF pulses into waveguide section with gas-filled tubes, under influence of downward powerful SHF radiation SHF-discharges are excited in the gas-filled tubes thus leading to formation of an electromagnetic band structure and pulse narrowing. The device for pulse length reduction of powerful SHF radiation contains a waveguide section with three gas-filled tubes connected by its one end through a coaxial transition and ferrite isolator to SHF-generator and by its other end through a coaxial transition and ferrite isolator to SHF-detector, the three gas-filled tubes are placed along the waveguide section perpendicular to its wide walls with distance l=Λ0/2÷Λ0, where Λ00(1-(λ0/2a)2)-1/2 is wave length in the waveguide, λ0 is wave length of downward SHF-radiation; a is a size of the wide wall in the waveguide section.

EFFECT: reducing length of microsecond pulse of powerful SHF radiation up to 10 ns and less.

2 cl, 2 dwg

FIELD: radio engineering, communication.

SUBSTANCE: microwave emission pulse is introduced to a waveguide section with gas-discharge lamps; glow discharges are lit in gas-discharge lamps by means of a pulse voltage generator, which leads to formation of a electromagnetic band structure. A device for reduction of duration of a microwave emission signal includes a waveguide section with five gas-discharge lamps, which is connected with one of its sides through a coaxial-waveguide transition and a ferrite valve to microwave generator output, and with the other side through a coaxial-waveguide transition and ferrite valve to a microwave detector; five gas-discharge lamps are located along the waveguide section perpendicular to its wide walls at interval l=Λ0/2÷Λ0, where Λ00(1-(λ0/2a)2)-1/2 - waveguide wave length, λ0 - length of incident microwave emission wave; a - size of wide wall of the waveguide section, and they are connected to the pulse voltage generator that is connected to the pulse generator output, the output of the synchronisation pulse of which is connected to the microwave generator.

EFFECT: reduction of duration of microwave pulses from tens of microseconds to tens of nanoseconds.

2 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: generator includes the first and second accumulative inductances, diode with a charge storage as well as two-channel control unit for operation modes with positive and negative polarity channels, consisting of a constant-voltage unit, the output of which is connected to an external source of voltage, the present output of the constant-voltage unit is up to its output via a resistor and is connected to the output of the operating amplifier, the negative input of which is connected to its output via a feedback resistor and pulled to the ground with another resistor and the positive input of the operating amplifier is supplied with a control signal.

EFFECT: implementation of the duration control of the generated ultra-short pulse due to the use of the diode switching time dependence with the charge storage from the conducting state to the closed state from the generator operation mode.

3 dwg

Up!