Radar system for detecting small target on sea

A technology for detecting radar and small targets, which is applied in radio wave measurement systems, measurement devices, radio wave reflection/reradiation, etc. It can solve the problems of inability to obtain target measurement at the same time, low resolution of radar distance, etc., and improve detection performance , Low external radiation, increase the effect of suppression ability

Inactive Publication Date: 2018-10-23
XIAN XIDE ELECTRONICS INFORMATION TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The embodiment of the present invention provides a radar system for detecting small targets on the sea surface, which is used to solve the problems in the prior art that the radar range resolution is low and the target measurement of the full range cannot be obtained at the same time

Method used

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  • Radar system for detecting small target on sea
  • Radar system for detecting small target on sea
  • Radar system for detecting small target on sea

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Embodiment

[0060] The pulse widths of the wide, medium, and narrow pulses given in the exemplary embodiment are 20us, 2us, and 0.2us respectively, and the sampling gate times are 328us, 20us, and 2us respectively. , so the equivalent sampling rate is 50MHz, it can be seen that the effective echo data points for wide, medium and narrow pulses are 16384 points, 1024 points and 100 points respectively. Among them, the wide and medium pulses are linear frequency modulation pulses, and the modulation pulse width is 25MHz; the narrow pulses are point frequency. The timing relationship between the frequency synthesizer generating the combined pulse and the signal processor sampling the data is as follows: Figure 8 shown.

[0061] Since the transmitting and receiving co-located pulse radar cannot receive the echo signal during the transmission period, according to R=cτ / 2, it can be known that the maximum blind distances of wide, medium and narrow pulses are 3km, 300m and 30m respectively. The...

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Abstract

The invention discloses a radar system for detecting a small target on the sea, and relates to the field of radar equipment. The system comprises a frequency synthesizer, a transmitter, a receiver, asignal processor, a display control combination, an antenna, and a servo device. The objective of the invention lies in providing a navigation radar of a solid coherent system. The radar employs a powerful signal processing means for a large-time-width bandwidth product chirp signal, so the radar is long in detection distance, is high in distance resolution and is strong in clutter inhibition capability. The radar also employs a combined pulse form of wide, medium and narrow pulses in the same pulse repetition period for achieving the simultaneous measurement of a full-range target with a small detection distance blind area.

Description

technical field [0001] The invention relates to the field of radar equipment, in particular to a radar system for detecting small targets on the sea surface. Background technique [0002] Navigation radar is used on ships to detect the position of surrounding targets, to implement navigation avoidance, self-positioning, etc., and is also widely used in VTS system detection radar. In the past 60 years, the navigation radar transmitters are all magnetron systems, with a peak pulse power of 2-30kw and an average power of 1-15w. The advantage of the magnetron system navigation radar is that the technology is mature and cheap, and it has good compatibility with the existing dominant VTS system imported from Europe and the United States. , it is impossible to obtain greater signal processing benefits through signal processing, so to obtain the same detection distance, kilowatt-level transmit peak power is required, while solid-state radar only requires tens of watts of peak power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/88
CPCG01S13/88
Inventor 张恒张昆王立东
Owner XIAN XIDE ELECTRONICS INFORMATION TECH
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