SU875644A1 - Multi-frequency radio-frequency oscillator - Google Patents

Description

(54) MULTI-FREQUENCY HIGH FREQUENCY GENERATOR

I

This invention relates to, j) radio.

A multi-frequency generator is known, comprising a reference frequency generator, an interpolation signal generator, a variable division frequency divider, communication units, frequency generators, signal combining units, frequency and phase control, program and logic blocks | 1,

The disadvantage of this generator is its complexity. ,

The closest in technical essence to the invention is a multi-frequency oscillator containing a reference frequency generator, the output of which is connected to the inputs of N high-frequency generators, the outputs of which are connected to the switch inputs, connected in series with the preliminary and output amplifiers, whose power supply circuits are connected to the outputs of a controlled impulse source ; 1c power 2J.

This generator does not have sufficient phase stability of the output signal in the frequency range.

The purpose of the invention is to increase the phase stability.

The goal is achieved by the fact that a multi-frequency high-frequency generator, comprising a reference frequency generator, the output of which is connected to the inputs of N high-frequency geierators, whose outputs are connected to the inputs of the switch,

 serially connected preliminary and output amplifiers, the power supply circuits of which are connected to the outputs of the controlled source of pulsed power supply, are introduced a synchronizer, N controllers, switching, main, mode control unit, N band-pass filters and a switch between the output of the switch and the preamplifier input, directional coupler The second output of which is connected via N bandpass filters to the inputs of the control unit for the mode, whose outputs through the switch are connected to the inputs of the regulators whose outputs connected to the inputs of the synchronizer, the outputs of which are connected to the control inputs of a controlled source of pulsed power, one of

30 inputs of which are connected to the control input of the switch.

The drawing shows a structural electrical circuit of the generator.

The generator contains an output amplifier 1 and a preliminary amplifier 2, the power supply circuits of which are connected to a controlled source 3 of the pulsed power supply, a reference frequency generator 4, high-frequency generators 5 and 6, switch 7, directional coupler 8, band pass filters 9 and 10, AND block mode control, switch 12, controllers 13 and 14, synchronizer 15. The output signal is removed from output 16.

The principle of operation of the generator is as follows.

During operation, all N generators 5 and 6 are simultaneously turned on. The output oscillation frequency is determined by switch 7. At the midband frequency of amplifier 1, the signal passes through switch 7, directional coupler 8, amplifier 2 to input of amplifier I. Since the set of N filters 9 and 10 there is no filter at the frequency fo, the signal to the input of block 11 is not received, and the device operates at the nominal repetition frequency F. When the operating frequency changes to any non-fo, continuous high-frequency signal at the frequency fi through the direction from The splitter 8 is fed to the input of the amplifier 2, where radio pulses are formed. From the second output of the directional coupler 8, a continuous signal is applied to the N filters 9 and 10. From the output of the filter tuned to the frequency fj, the signal goes to one of the inputs of the .11 block, which converts the high-frequency oscillations into the band input coming through the switch 12 to the regulator input 13. The regulator 13 generates the voltage applied to the input of the synchronizer 15, in accordance with which the repetition frequency F increments ± DR |, compensating for the change in energy consumption from power sources, in comparison with the nominal When the transition to the operating frequency.

When the frequency of the pulse repetition taken from the synchronizer 15 is changed by W, the signal is fed to the control input of the switch 12. In this case, the signal taken from the regulator 13 and fed to the input of the synchronizer 15 changes its value so that

changing the repetition rate of mF was equal to ± mAFi and the device operates at a repetition rate of mF, as described above.

The time of changing the pulse repetition rate is monitored by one pulse repetition period. When the working frequency changes, due to a corresponding change in the pulse repetition period, it is possible to compensate for the change in energy consumption from the power source and the transient process in it does not have time to develop,

improves the phase stability of the output signal and normalizes the operation of the entire device.

Claims (2)

1. US Patent No. 3916334, cl. 331-4, 10.28.75. 2.Vishin G.M. Multifrequency radar. M., 1973, p. ten.