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Home Environmental Radar for territorial coast waters guarding

Radar for territorial coast waters guarding


One actual problem concerning radio wave propagation and radar technology is development of radio engineering equipment for detecting above-water objects at over-the-horizon distances. It becomes necessary because radars must not only provide above-water object detection and its azimuth and range estimation, but also be environmentally safe for anyone.

It is known that a radar range and required power potential C strongly depend on propagation factor V , which indicates propagation conditions for direct and echo signals. In order to decrease impact of radio wave attenuation factor upon the radar range we suggest utilizing bistatic radar with a buoyant active radio beacon secured at anchor beyond the radio horizon.

The radar system is sketched in the figure. The receiving center A is installed on the sea shore and consists of rotating high-gain antenna system 1, echo signal receiver 2, signal processing unit 3, ancillary low-gain antenna 4 and direct signal receiver 5. Antenna 7, which is omnidirectional in a horizontal plane, is mounted on a mast of a floating buoy B. On the buoy there is a transmitting device 8 that radiates high-stability continuous signal. In the regions of the World Ocean with pronounced and often occurred evaporation wave-guides the buoy’s mast height must be less than 5 m and transmitter power tends to its minimal value. In other regions of the World Ocean the buoy’s mast height and transmitter power can be higher.

Innovative Aspect and Main Advantages

The proposed bistatic radar system is ecologically safe because its transmitter is placed beyond the radio horizon limits and has small radiation power. With a power potential being considerably lower against common used pulse- and continuous-wave radars, this system makes it possible to detect an above-water object beyond the radio horizon limits. The system is multifunctional: the radars can detect and define range and azimuth of an above-water object.

Areas of Application

The most useful field of application of the proposed radar system may be regions with fishing grounds where water is shallow and one can easily install a low-cost radio buoy. Beside that over the horizon detection of above-water objects could be performed by means of existing radar systems complemented with additional radio buoys.

Radar system with a buoyant radio beacon
Radar system with a buoyant radio beacon

Stage of Development

Today the system is on the stage of its feasibility study.

Contact Details

Kogut Aleksandr Yevgenievich
Organization: Usikov Institute of Radiophysics and Electronics of NAS of Ukraine
Address: 12, Ac. Proskura St., 61085, Kharkov, Ukraine
+38-057-720-34-57, +38-057-720-33-19,  Mob: +38-050-401-16-96
Fax: +38-057-315-21-05
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