RU2730069C1 - Device for generating or receiving radio-frequency signal in controlled missile with control over fibre-optic cable - Google Patents

Abstract

FIELD: rocket equipment.SUBSTANCE: invention relates to rocket engineering and can be used in controlled missiles with control over fibre-optic cable using radio-frequency signals for data transmission and guidance. Device comprises a control station, a radio frequency signal amplification unit, a processing unit, a band-pass filter, a nonlinear modulation or demodulation device, an optical modulator and a demodulator. Device further comprises an external synthesizer of a highly stable reference signal for generating or receiving a radio-frequency signal located at the control station. Said synthesizer is configured to mix its signal with control signals. Output of the optical demodulator is connected to the input of the bandpass filter. Input of the optical modulator is connected to the output of the external synthesizer of the highly stable reference signal.EFFECT: high reliability of operation of the device owing to reduced level of phase noise of the reference signal, as well as simplification of the device and reduction of its cost.1 cl, 2 dwg

Description

The invention relates to rocketry. The invention can be used in fiber-optic guided missiles using radio frequency signals for information transmission and guidance.

A block diagram of a typical RF signal generating or receiving device in a fiber-optic missile is shown in FIG. 1. An example of using such a device can be the SpikeNLOS / 1 / rocket. The device consists of an RF signal amplification unit, a reference signal synthesizer, a bandpass filter, a nonlinear RF signal modulation / demodulation device, and a processing unit.

Closest to the claimed invention is a device for receiving a radio frequency signal in a RALAS rocket, which contains the same basic elements as the receiving device in FIG. 1/2 /. This device was chosen as a prototype.

The above-described typical receiving or transmitting device and the prototype have the main disadvantage, which consists in the need to include a reference signal synthesizer in the rocket, which leads to the impossibility of using thermostated reference signal generators for the frequency synthesizer, due to their large dimensions, long run times and significant power consumption.

The objective of the invention is to reduce the level of phase noise of the reference signal, simplify the design and reduce the cost of the device.

A device for generating or receiving a radio frequency signal in a guided missile controlled via a fiber optic cable consists of a radio frequency signal amplification unit (1), which is connected to a nonlinear modulation or demodulation device (2), the second input of which is connected to the output of a bandpass filter (4 ), the input of which is connected to the output of the optical demodulator (6), the input of which is connected by a fiber-optic cable (7), the input of which is connected to the output of the optical modulator (8), the input of which is connected to the synthesizer of a highly stable reference signal (5), the processor (16 ) is connected to a modulation or demodulation device (3).

The signal generated at the control station and transmitted over the fiber-optic cable has a lower phase noise level than the level achievable when using the reference signal synthesizer in the rocket. Since the design of the rocket assumes the presence of a fiber-optic demodulator for receiving control signals, the complexity of the rocket design is reduced in comparison with the traditional approach in the form of using a frequency synthesizer on board the rocket.

The task is achieved by using an external high-stability signal generator. At the control station, a highly stable reference signal generator will generate a highly stable signal with low phase noise. This signal is transferred by an optical modulator (8) into the optical range. A fiber optic cable (7) sends a signal to the rocket. In a rocket, the signal is transferred to the radio frequency range using an optical demodulator (6) and fed to a bandpass filter (4). From the output of the bandpass filter (4), the signal is fed to a nonlinear device for generating / receiving an RF signal (2). The control station allows the use of devices with large weight and dimensions and has a greater resource in energy consumption than a rocket, which allows the use of a thermostated reference signal generator for a frequency synthesizer. Fiber optic cable has extremely low propagation loss.

FIG. 1 shows a block diagram of a typical RF signal receiving device, where:

1. RF signal amplification unit;

2. Non-linear modulation or demodulation device;

3. Processor.

4. Bandpass filter;

5. Reference signal synthesizer;

6. Optical demodulator;

7. Fiber optic cable;

8. Optical modulator.

FIG. 2 shows a block diagram of the invention,

Where:

1. RF signal amplification unit;

2. Non-linear modulation or demodulation device;

3. Processor.

4. Bandpass filter;

5. Synthesizer of a highly stable reference signal;

6. Optical demodulator;

7. Fiber optic cable;

8. Optical modulator.

An example of a specific implementation of a device for receiving a radio frequency signal.

The control station has a 14.3 GHz high-stability signal synthesizer with a thermostated quartz reference oscillator. The signal is mixed with control signals and fed to the optical modulator. From the output of the optical modulator, the signal through a fiber-optic cable enters the rocket board to the input of the optical demodulator. From the output of the optical demodulator, a signal with a frequency of 14.3 GHz is fed to the input of a bandpass filter with a central frequency of the passband of 14.3 GHz. From the output of the bandpass filter, the signal goes to the demodulator input. The signal from the output of the low-noise amplifier is fed to the second input of the demodulator. The low-frequency information signal from the demodulator output goes to the input of the handler installed on the rocket.

An example of a specific implementation of a device for generating a radio frequency signal.

The control station is equipped with a 34 GHz high-stability signal synthesizer with a lead zirconate-titanate reference generator. The signal is mixed with control signals and fed to the optical modulator. From the output of the optical modulator, the signal through a fiber-optic cable enters the rocket board to the input of the optical demodulator. From the output of the optical demodulator, the signal with a frequency of 34 GHz is fed to the input of a band-pass filter with a center frequency of the pass-band of 34 GHz. From the output of the band-pass filter, the signal goes to the input of the modulator. The modulating signals from the processor are received at the second input of the modulator. From the output of the modulator, the signal goes to the input of the power amplifier.

Thus, the present invention uses a reference signal generator located at the control station. This solution allows to simplify the rocket device, which reduces the cost of the device. In addition, the synthesizer located at the control station allows the use of a more expensive thermostated reference oscillator, since it will not suffer during operation. As a consequence, the proposed invention has a better phase noise level. The proposed invention has less complexity, cost of the device and a better level of phase noise in comparison with the prototype.

Sources of information:

1. Equipment and weapons. 2014. No. 10. P. 9.

2. Tactical missile system RALAS [Electronic resource] / Sergey Yuferev. - Electron, text data. - Access mode: https://army-news.ru/2019/02/protivotankovyj-raketnyj-kompleks-ralas/, free - prototype.

Claims (1)

A device for generating or receiving a radio frequency signal in a guided missile with control over a fiber optic cable, containing a control station, a radio frequency signal amplification unit, a processing unit, a bandpass filter, a nonlinear modulation or demodulation device, an optical modulator and a demodulator, characterized in that it additionally contains an external synthesizer of a highly stable reference signal for generating or receiving an RF signal, located at the control station and configured to mix its signal with control signals, the output of the optical demodulator is connected to the input of the bandpass filter, and the input of the optical modulator is connected to the output of the external synthesizer of the highly stable reference signal.

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