Method and device for generating and receiving super-short carrier-free electromagnetic pulsed signals

FIELD: short-range radio communication and radar systems.

SUBSTANCE: proposed method includes storage of electric field potential by means of storage capacitor, avalanche discharge of storage capacitor, reception and radiation of electromagnetic wave by means of receiving-radiating element, concurrent generation, transmission, and radiation of pulsed signals. Electric field potential is stored by storage capacitor simultaneously with its storage at receiver input from current waves formed by pulses of receiving electromagnetic wave across two separated conductors of transceiving element; avalanche discharge of storage capacitor is conducted simultaneously with generation of current waves in same conductors producing radiated electromagnetic wave pulse. Device implementing proposed method has sawtooth current pulse generator connected to storage capacitor, avalanche diode, receiving-radiating element, and receiver. Receiving-radiating element is made in the form of two separated conductors shorted out on one end; they are series-connected with avalanche diode and storage capacitor at input and parallel-connected with receiver input through controlled limiter.

EFFECT: enhanced antenna efficiency and gain, as well as noise immunity, reduced power loss.

4 cl, 2 dwg

 

The invention relates to methods of forming and receiving pulsed electromagnetic signals ultrashort duration without the carrier and is used in radio communication and radar systems, short-range

Such signals are called ultra-wideband short-pulse signals. Their use increases the speed of information transmission, immunity and reduces energy costs. (Austrian scientist, D.Sc H.F. Nonsinusoidal waves in radar and radio communications. TRANS. from English. M.: Radio and communication, 1985).

In the known methods for the formation and reception of pulsed electromagnetic signals ultrashort duration without carrier used for traditional radio, using a carrier signal separated sequentially in time steps of: generating electromagnetic pulse generator, transfer them to the antenna transmission line and the antenna radiation in the formation of electromagnetic signals and, respectively, the reception of electromagnetic pulses antenna and their transfer to the transmission line to the receiver during reception of electromagnetic signals. (Andreev Y.A., Buyanov SCI, Vizier, VA, Efremov V. M., Zorin V.B. have been, Kovalchuk BM, V.I. Koshelev, V.V. Plisko, Suhosin KN. The generator requiring gigawatts of ultrawideband radiation. Instruments and experimental techniques. 2000. No. 2. p.52-88).

The use of such p is sdelannyh time of action for the formation and reception of pulsed electromagnetic signals ultrashort duration without carrier leads to the problem of converting an electrical signal into an electromagnetic (unipolar pulse in the bipolar), to issue approval of all independent devices with each other using a pulse signal, to the small coefficient of directional self-antenna ultra-wideband antenna).

To increase the directivity of the transmitting and the receiving antenna have to use arrays (Andreev Y.A., Buyanov SCI, Koshelev VI.., Suhosin KN. Element scanning antenna array for emitting a powerful ultra-wideband electromagnetic pulses". Radio engineering and electronics, 1999, C. No. 5. s-537).

These elements of the scanning antenna array for emitting a powerful ultra-wideband electromagnetic pulses have a low coefficient of directed action. The Association of these elements in the lattice allows to increase the ratio of directed action, but the antenna system becomes bulky, there is a mutual influence of elements on each other, which reduces efficiency and distorts the signals.

The technical result of the invention is to increase efficiency and coefficient of directional antennas with optimal dimensions of the antenna system.

To this end, in the method of formation and reception of pulsed electromagnetic signals ultrashort duration without carrier, including the accumulation of potential electric floor the cumulative capacitor, avalanche discharge storage capacitor, the reception and emission of electromagnetic waves, the accumulation of electric field potential cumulative capacitor is produced simultaneously with the accumulation potential of the electric field at the receiver input from wave power derived from the pulses received electromagnetic waves at two spaced conductors receiving-emissive element, and an avalanche discharge storage capacitor is produced simultaneously with the formation of wave power in the same conductors receiving the emissivity of the element forming the momentum of the emitted electromagnetic wave.

The device for implementing this method, the formation and reception of pulsed electromagnetic signals ultrashort duration without carrier contains a pulse generator sawtooth current, connected with the storage capacitor, avalanche diode (or gas discharger), two-radiative element, the receiver, and transceiver radiative element is designed in the form of two spaced conductors shorted at one end, and at the entrance of series-connected avalanche diode and storage capacitor and, via a controlled limiter, connected in parallel with the input of the receiver. If the conductors are open output, then the input they are short-circuited through the throttle.

Thus, the proposed method of operation of generation, transmission and radiation of pulse signals aligned in time. Forming an electromagnetic pulse begins at the time of the beginning of the avalanche process and continues during the time of propagation of the current on the conductor receiving radiation element. These current wave not only transfer energy from the storage capacitor, and radiate it creating a directed radiation in the direction of its distribution. Energy from the storage capacitor does not flow into the receiver, connected parallel to the input of the receiving-radiative element through the serially connected to the receiver managed restrictive device. A pulse signal at the receiver input is received from the conductor receiving-radiative element, which operates the feeding electromagnetic wave, in times of energy storage in the storage device from a source off the restrictive device. Thus, it is a temporary separation of the radiated antenna signal taken from the same antenna signal.

The combination of the operations of generation, transmission, radiation and division pulse signals allows to solve the problem of sverkhshirokopolosnoi, increase efficiency and gain directional d is istia antenna and optimize energy costs.

Diagram of the device that implements the proposed method is presented in the drawings, where:

figure 1 shows a diagram of the device with conductors shorted at the output,

figure 2 - diagram of the device with conductors shorted at the input.

The source of pulses of the sawtooth current (IPT) 1 (1) is connected through a limiting resistance 2 with the storage capacitor 3, which is a pulse avalanche diode 4 is connected to the inputs (I) conductors 5 and 6 receiving-radiative element (S). The input conductors 5 and 6 receiving-radiative element through a controlled limiter (About) 7 is connected to the inputs of the receiver (PR) 8. The source pulse ramp current 1 is connected with the control unit (CU) 9 limiter 7. The conductors 5 and 6 receiving-emissive element is short-circuited at one end, namely: input (I)or output (O). Moreover, in the first case (at the entrance) they must be short-circuited through the throttle (Etc) 10 (2).

The device operates as follows. From a source of pulses of the sawtooth current 1 through restrictive resistance 2 is the charge storage capacitor 3. Through the shorted outputs conductors 5 and 6 (figure 1), or through the choke 10 (2), the voltage across the capacitor 3 locks the diode 4. The current in the conductors 5 and 6 receiving-emissive element is very small and the p is dnice function as the receiving antenna. Waves of current in the conductors of the excited electromagnetic pulse waves from the surrounding space, creating a voltage at the receiver input. The pulses of electromagnetic waves at first excite the outputs of conductors and continue to transmit energy pulses of current in the conductors, advancing them to the entrance of the conductors. This ensures that the orientation of the receiving antenna.

Upon reaching the blocking voltage on the diode 4 of the magnitude of the breakdown voltage avalanche begins the process of reducing the resistance of the diode 4, accompanied by a sharp increase in current. Storage capacitor 3 starts quickly be discharged. The voltage at the input conductors 5 and 6 are practically does not change, but there is a current pulse, which propagates along the wire from input to output conductors. The energy of the current pulse is gradually consumed in the radiation directed along the conductors.

Along with the rapid discharge storage capacitor 3 resistance pulse avalanche diode 4 is restored. The large resistance of the limiter 7 and, respectively, low input voltage conductors 5 and 6 receiving-radiative element during discharge of the storage capacitor 3 prevent overload of the receiver 8 during radiation. Storage capacitor 3 again starts to charge. / Min net is rise of the sawtooth current and the time constant of the charge storage capacitor determine the repetition period of the emitted pulses. The resistance of the limiter 7 in the receiver circuit 8 decreases in time from the beginning of the repetition period up to the end. This increases the linear sensitivity of the receiver for signals from the remote device object.

Receiving-radiative element of the two adjacent conductors is an antenna with a traveling wave magnetic current. The distance "d" between the conductors, their shape and length "L" are selected depending on the shape and spatial duration pulsed electromagnetic signal, providing effective directed radiation.

Implementation of the proposed method improves the efficiency and the directivity factor of the antenna and optimize energy costs.

1. The method of formation and reception of pulsed electromagnetic signals ultrashort duration without carrier, including the accumulation of electric field potential cumulative capacitor, an avalanche discharge storage capacitor, the reception and emission of electromagnetic waves priemyselna element, characterized in that the process of accumulation of electric field potential cumulative capacitor is produced simultaneously with the accumulation potential of the electric field at the receiver input from wave power derived from the pulses received electroma the magnetic waves at two spaced conductors premoistened element, and an avalanche discharge storage capacitor is produced simultaneously with the formation of wave power in the same conductors forming the momentum of the emitted electromagnetic wave.

2. The device for implementing the method of the formation and reception of pulsed electromagnetic signals ultrashort duration without carrier containing the pulse generator sawtooth current is connected with a storage capacitor, an avalanche diode, priemyselna element, the receiver, characterized in that priemyselna element is designed in the form of two spaced conductors short-circuited with one of the ends, and with the entrance connected in series with the avalanche diode and storage capacitor and, via a controlled limiter, connected in parallel with the input of the receiver.

3. The device for implementing the method of the formation and reception of pulsed electromagnetic signals ultrashort duration without carrier according to claim 2, characterized in that the conductors are short-circuited at the output.

4. The device for implementing the method of the formation and reception of pulsed electromagnetic signals ultrashort duration without carrier according to claim 2, characterized in that the conductors are opened at the output and at the input short-circuited through the throttle.



 

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