Forward voltage synthesis-based Loran-C transmitter main circuit

Abstract

The invention provides a forward voltage synthesis-based Loran-C transmitter main circuit. The circuit comprises a power amplifier module, a trailing edge circuit, a resonance network and a power amplifier power supply; the power amplifier power supply provides working voltage for the power amplifier module and the trailing edge circuit; the power amplifier module adopts a D-type power amplifier and converts a direct-current voltage output by the power amplifier power supply into an alternating-current square-wave voltage with a Loran-C working frequency; the trailing edge circuit is connected with the power amplifier module and the resonance network to generate a Loran-C current trailing edge; and the resonance network completes tuning filtering with a transmitting antenna, and oscillates a synthesized forward voltage to generate a standard Loran-C current. The forward voltage synthesis-based Loran-C transmitter main circuit has the advantages of high transmitting efficiency, short synthesis period, simple phase control, easiness in the realization of an engineering mode, and the like; the voltage output, synthesis and control period of a Loran-C transmitter can be effectively shortened, the number of participation power amplifier modules is reduced, and the cost of the transmitter is reduced.

Description

technical field [0001] The invention relates to the field of low-frequency high-power transmission, in particular to a main circuit of a Loran-C transmitter, which is used for Loran-C signal transmission. Background technique [0002] The Roland C system is a land-based long-range radio navigation system with high repeat positioning accuracy, strong anti-jamming capability and all-weather continuous positioning capability. The Roland C system is mainly composed of the operation control center, the transmitting station, the monitoring station, the differential station and the timing user. Three or more transmitting stations form a station chain. Each transmitting station operates at a frequency of 100kHz and transmits timing pulses encoded with fixed phases. Signal, the main station sends nine pulses in each group, and the auxiliary station sends eight pulses in each group. There is a fixed delay difference between the timing pulses between each auxiliary station and the main...

AI Technical Summary

Problems solved by technology

Based on the principle of magnetic pulse compression, traditional Roland C transmitters use four half-cycle currents to synthesize high-power current waveforms, and generate standard Roland C current waveforms by impacting the back-end tuning network. Traditional transmitters are limited by charging capacitors, thyristors, magnetic The performance of devices such as pulsers and low emission efficiency; the Roland C transmitter with full-cycle voltage synthesis synthesizes positive and negative voltages to form 25 cycles of high-power voltage waveforms, and generates standard Roland by impacting the back-end tuning network oscillations C current waveform, the Roland C transmitter with full-cycle voltage synthesis has more voltage synthesis cycles, and the phase control is cumbersome. It is difficult to achieve precise control of the full-cycle phase, and it is difficult to achieve high-power engineering.

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