Download e-book for kindle: Bistatic radar by Nicholas J. Willis

By Nicholas J. Willis

ISBN-10: 1891121456

ISBN-13: 9781891121456

A reference which summarizes effects from bistatic radar study and includes fabric on thoughts, definitions and mathematical improvement of simple relationships. the basics of bistatic radars are mentioned when it comes to thought, standards, functions, know-how, merits and obstacles. This reference is perfect for ECM and ECCM engineers operating in layout and function research for study and improvement.

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Example text

In any case, with the invention of the duplexer in 1936 by Taylor and Page, all subsequent work focused on the pulsed, monostatic radar, with its vastly improved operational flexibility. S. Army Signal Corps at Fort Monmouth, New Jersey, initated radar experiments that were in a bistatic configuration, principally for transmitter-receiver isolation [25]. In 1934 they used the beat frequency method to detect a Ford truck at 250 ft as it moved down the perpendicular bisector of the baseline, L = 40 ft.

6 Developments in Germany In Germany, the beat frequency phenomenon had been observed in 1934 when a ship passed through a decimeter radio beam. " However, it was not pursued in a forward-scatter fence configuration, but rather in a monostatic configuration using two antennas separated only enough for isolation. Successful tests were conducted in 1934 using 630-MHz equipment with a transmitter-receiver separation of 200 m. A ship was detected at 12 km and an aircraft at less than 1 km. Further German research concentrated on pulsed operation for improved signal isolation and range measurement [158, 159].

The phenomenon was also studied using a vertical beam antenna which confined its energy to a narrow vertical cone. An airplane flew across this cone from various directions and at various altitudes. An extremely weak ground signal—attenuation was necessary if the ground wave was to beat against the sky wave—was obtained from this beam at a distance of 10 miles. When the plane flew into the cone the usual change in the ground signal was observed. Successful tests were made on a frequency of 65 MHz and the same variations were heard from a receiver placed in a car.

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Bistatic radar by Nicholas J. Willis

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