A High Power Solid State Transmitter Circuit

Abstract

The invention provides a high-power solid state transmitter circuit, which comprises a frequency source, a drive amplifying circuit, a microwave switch, a 3dB directional coupler A, a 3dB directionalcoupler B, a power amplifying circuit 1, a power amplifying circuit 2, a modulating circuit, a modulation and on-off control circuit, an antenna 1 and an antenna 2. The frequency source is connected with the drive amplifying circuit; the modulation and on-off control circuit is respectively connected with the drive amplifying circuit and the microwave switch; the microwave switch is connected withtwo input ends of the 3dB directional coupler A; an output end of the 3dB directional coupler A is respectively connected with input ends of the power amplifying circuit 1 and the power amplifying circuit 2; an input end of the 3dB directional coupler B is respectively connected with output ends of the power amplifying circuit 1 and the power amplifying circuit 2; the modulating circuit is respectively connected with the power amplifying circuit 1 and the power amplifying circuit 2; and an output end of the 3dB directional coupler B is respectively connected with the antenna 1 and the antenna2.

Description

Technical field[0001]The invention relates to a high-power solid-state transmitter circuit.Background technique[0002]As an important part of the command guidance system, the main function of the transmitter is to realize the amplification and modulation of electromagnetic wave signals. In modern warfare, new requirements are put forward for the anti-electromagnetic interference capability of the command guidance system. To meet the new requirements, transmitters are developing in the direction of large bandwidth and high transmission power. The existing transmitter solution: a frequency source generates a high-frequency signal, which is driven and amplified and injected into the magnetron. The magnetron further amplifies the signal, and then sends the signal to the antenna through a microwave switch. The modulation signal controls the drive amplification and the magnetron for pulse modulation, and the switch control signal controls whether the signal is sent to antenna 1 or antenna ...

AI Technical Summary

Problems solved by technology

Existing transmitter solutions use magnetrons as power amplifiers. Due to the working characteristics of magnetrons, their working bandwidth is small and their reliability is low. During the production process, huge economic losses have been caused by the reliability of magnetrons.

In addition, the background scheme puts the microwave switch behind the magnetron, so the microwave switch needs to withstand high power, which poses a huge challenge to the design of the microwave switch. At present, the cost of high-power microwave switches is high and the reliability is not high.

In the face of the complex electromagnetic environment in the future battlefield, the use of high-power transmitters as an anti-interference method can no longer meet the requirements of use

However, due to the limitations of the magnetron, the background solution cannot add anti-interference methods such as frequency hopping and direct spread.

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