RU2497270C1 - Ultra-broadband signal amplification device - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: ultra-broadband signal amplification device, having a first mixer and a second mixer, two heterodynes and a band-pass filter in form of a differential or summation frequency filter, is also provided with a high-frequency amplifier situated between the band-pass filter and the second mixer, a low-pass filter connected to the output of the second mixer, as well as a reference generator, the outputs of which are connected to heterodyne inputs.

EFFECT: amplifying ultra-broadband signals using standard wideband radio techniques.

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Description

The invention relates to the field of radio engineering, in particular to ultra-wideband devices, and may find application in radio communication systems, radar and electronic warfare.

Known radar station containing a high-frequency amplifier (RF Patent No. 2096801 from 11/20/1997).

Known superheterodyne receiver containing a mixer, to one of the inputs of which a local oscillator is connected, the output of which is connected by a band-pass filter (Radio receivers. Edited by A.G. Zyuko. - M .: Communication, 1975, p. 8, Fig. 1.2) . The main disadvantage of the device is the inability to work with ultra-wideband signals.

The closest in technical essence to the claimed device is a microwave transceiver containing a series-connected first mixer, a bandpass filter made in the form of a filter differential or total frequency, and a second mixer, as well as two local oscillators (RF Patent No. 2133078, from 10.07.1999) . However, this invention is not intended to amplify signals, does not have the ability to work with ultra-wideband signals, and its main purpose is to filter spurious signals when working with microwave signals.

The technical result that will be obtained by carrying out the invention is the possibility of amplifying ultra-wideband signals using standard methods of narrowband radio engineering.

To achieve this technical result, a device for amplifying an ultra-wideband signal, containing the first and second mixers, two local oscillators and a bandpass filter made in the form of a difference or total frequency filter, is equipped with a high-frequency amplifier located between the bandpass filter and the second mixer, a low-pass filter connected to the output of the second mixer, as well as the reference generator, the outputs of which are connected to the inputs of the local oscillators.

The introduction of a high-frequency amplifier and a low-pass filter into the device for amplifying an ultra-wideband signal allows one to obtain a new property consisting in amplifying the input signal at a high frequency and the possibility of further transferring the center frequency of the signal spectrum to zero frequency, and the introduction of a reference oscillator provides synchronization of local oscillators and simplifies the device’s circuit whole.

Figure 1 presents a schematic diagram of a device for amplifying an ultra-wideband signal.

A device for amplifying an ultra-wideband signal comprises a first mixer 1 (C1), the first input of which is the input of the device. The second input of the mixer 1 is connected to the output of a low-power high-frequency generator - local oscillator 2 (G2). The output of the mixer 1 is connected to the input of a band-pass filter 3 (PF 3), connected in series with a high-frequency amplifier 4 (U4) operating in the frequency band of the filter 3. The output of the amplifier 4 is connected to the first input of the second mixer 5 (C5), the second input of which is connected to the output of the second local oscillator 6 (G6). The output of the second mixer 5 is connected to the input of the low-pass filter 7 (FN7), the output of which is the output of the device. The output of the reference generator 8 is connected to the inputs of the local oscillators 2 and 6.

A device for amplifying an ultra-wideband signal operates as follows.

An ultra-wideband signal is fed to the input of mixer 1. A signal from a low-power high-frequency generator - local oscillator 2 is fed to the second input of mixer 1. At the output of mixer 1, signals are generated with frequencies equal to the sum and difference of the frequencies of the local oscillator 2 and the input signal. Using a band-pass filter 3, a difference or total frequency signal is extracted, which is fed to a high-frequency amplifier 4 operating in the filter frequency band. When the signal spectrum is transferred to the high-frequency region, the signal becomes narrow-band and satisfies all the laws of physics of narrow-band signals, since it produces amplification at a high frequency. The amplified signal is fed to the input of the mixer 5, to the second input of which the signal from the local oscillator 6 is supplied. The frequency of the local oscillator 6 signal is determined as the difference or sum (depending on whether the difference or total frequency was allocated by a band-pass filter) of the local oscillator 2 frequency and the center frequency of the ultra-wideband spectrum signal. As a result, at the output of the mixer 5, signals are generated with frequencies equal to the sum and difference of the frequencies of the local oscillator 6 and the signal from the output of the amplifier 4. The signals from the output of the mixer 5 are fed to the input of the low-pass filter 7, which will leave only the difference frequency in the signal. In this case, the central frequency of the spectrum of the signal at the output of the filter 7 is zero, and the signal itself is again ultra-wideband. Frequency transfer downward occurs at a frequency greater than upward transfer, since this conversion does not allow passage through the device and amplification of a constant parasitic component in it, and also reduces the sampling frequency. The reference generator 8 is the master and serves to synchronize the local oscillators 2 and 6.

The frequency conversion process in the amplification device is shown schematically in FIG. 2.

Information sources

1. RF patent No. 2096801 dated 11/20/1997.

2. Radio receivers. Ed. A.G. Zyuko. - M.: Communication, 1975, p. 8, Fig. 1.2

3. RF patent №2133078, from 10.07.1999 - prototype.

Claims (1)

A device for amplifying an ultra-wideband signal, containing the first and second mixers, two local oscillators and a bandpass filter made in the form of a difference or total frequency filter, characterized in that it is equipped with a high-frequency amplifier located between the bandpass filter and the second mixer, a low-pass filter connected to the output the second mixer, as well as a reference generator, the outputs of which are connected to the inputs of the local oscillators.

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