A ship navigation radar transmitter modulator

Abstract

The invention discloses a transmitter modulator of a marine navigation radar. The modulator comprises a driving switch circuit, a driving triggering switch circuit, a high-voltage trigger push-pull circuit, a high-voltage switching power supply and rectification circuit, a high-voltage modulation transformer, a test power loop, a rectification circuit, an audio transformer, an AC power transformer, a magnetron, an FPGA module control circuit and a high-voltage wake control circuit; the test power loop comprises a precise resistor and an analog-to-digital conversion module, a feedback current passes the precise resistor to form a feedback voltage, and the feedback voltage is converted into digital signals via an AD conversion chip; and the test power loop provides a loop signal to the FPGA module control circuit, and the FPGA module control circuit adjusts the output voltage of a high voltage power supply at the same time. A secondary voltage stabilizing system is used, it is ensured that a pulse voltage of a transceiver is stable, the pulse width of the wake of the high-voltage transformer is improved, the minimal detection distance of the radar is improved, and the whole performance of the radar is improved.

Description

technical field [0001] The invention belongs to the field of ship navigation radar, in particular to a ship navigation radar transmitter modulator. Background technique [0002] Ship navigation radar, as an indispensable navigation tool for ship navigation, port entry and exit, ship positioning and narrow channel night driving, occupies an important position in marine electronics. With the development of shipbuilding industry, marine electronic equipment, especially ship navigation radar received extensive attention and research. At present, domestic marine radars have a series of problems such as lack of radar transmitter design technology, low radar range resolution, weak short-range detection capability, and serious intermediate frequency drift. In response to the above problems, this paper carried out the design of the ship navigation radar transmitter, explored the ship navigation radar transmitter technology, improved the radar performance, reduced the production cost...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the present invention provides a ship navigation radar transmitter modulator, which can overcome a series of problems such as weak short-distance detection capability of the radar transmitter computer and switch pulse interference in the domestic navigation radar

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