Dual-system transmitter applied to ship navigation radar

Abstract

The invention provides a dual-system transmitter applied to a ship navigation radar. In a near-zone blind scanning mode, continuous wave excitation signals are amplified by a solid-state amplifier and are conducted selectively by a switch and a high-power switch so that the amplified signals are transmitted to a transmitting antenna, and at the moment, an adjustable attenuator in the solid-state amplifier is in an unattenuated operation state; in a remote detection mode, pulse signals are amplified by the solid-state amplifier, are selected by the switch as input signals of an electric vacuum power amplifier and are amplified to 80 dBm, the amplified signals are transmitted to the antenna through selection by the high-power switch, and power of the pulse signals is attenuated to 10-20 dBm by an adjustable attenuator in the solid-state amplifier; an integrated circuit regulator controls excitation of the solid-state amplifier and the electric vacuum power amplifier. The dual-system transmitter can provide continuous wave system transmissions on the basis of an existing high-power pulse system, can be applied to remote detection and close-range blind zone compensation and is of great significance to the technical development of the ship navigation radar.

Description

technical field [0001] The invention relates to a dual system transmitter of a 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,...

AI Technical Summary

Problems solved by technology

The radar uses the solid-state power amplifier's pulse system combined with the continuous wave system to solve the problem of navigation radar detecting short-range blind spots, but the problem is that: on the one hand, the cost of the transmitter realized by the solid-state power amplifier is much higher than that of the electronic device represented by the traveling wave tube. Transmitters realized by vacuum devices; on the other hand, the detection distance of solid-state power amplifier transmitters is much lower than that of transmitters based on electric vacuum devices; Realizing continuous wave system transmission on the basis of high-power pulse system is of great significance to the technical development of ship navigation radar

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