High-power navigation radar based on microwave coherent combination of magnetrons

Abstract

The invention provides a high-power navigation radar based on microwave coherent combination of magnetrons. A display terminal inputs a control signal, two modulator circuits are driven to be controlled by a control circuit, two same control signals are generated, and the magnetrons are controlled to generate two transmission signals with set frequency; the control signals driven by the control circuit control an externally-injected microwave source, two same microwave signals are generated, two composite signals are input into a directional coupler, final transmission signals are formed, coupling signals of the two directional couplers are fed back to the control circuit, and in this way, phase-shift values of externally-injected microwave source signals in the system are judged. According to the radar, the coherence of high-power signals synthesized by two circuits according to circulators is guaranteed, a waveguide power combiner is used for achieving coherent combination of the high-power transmission signals generated by the two magnetrons at last, the navigation radar is launched at high power, remote detection can be achieved, and safe navigation or smooth mooring of ships is guaranteed.

Description

technical field [0001] The invention relates to a high-power navigation radar. Background technique [0002] Navigation radar is installed on various ships to detect various objects around the ship carrier, such as ships, navigation marks, bridge piers, embankments, ice floes, islands, icebergs, coastlines, etc., to provide the crew with intuitive and clear target distance and azimuth data, according to It is necessary to issue warning messages to avoid dangerous obstacles, prevent collision accidents, and ensure safe navigation or smooth anchoring of ships. [0003] Since the German Chrisian Hulsmeyer applied for a monostatic pulse radar patent in 1904 and promoted it for ship collision avoidance at sea, marine navigation radar has experienced a century of development. The earliest commercial marine radar appeared in 1946; in 1960, the International Conference on Marine Life Safety recommended the use of radar to prevent ship collision accidents. In 1974, the conference st...

AI Technical Summary

Problems solved by technology

Fierce market competition has led to the focus of radar on the price of products rather than the application of new technologies. Unless there are clear provisions in legal provisions, those technologies with high prices will not be applied.

[0005] At this stage, mainstream navigation radars generally use magnetron or solid-state transmitters. The cost of solid-state systems is generally high, and they have not been widely used in this field. Traditional magnetron navigation radar transmitters have limited transmission power and cannot achieve long-distance For detection, if two magnetrons are used to use microwave coherent synthesis technology, the transmission power can be effectively increased, and the detection distance can be effectively expanded. However, there is currently no technical solution for two magnetrons to work together for navigation radar transmission. machine design

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