초록 ▼

A radar system for determining not only the azimuth and range of a target but also the target height over a predetermined range of elevation angles has separate receiving and signal processing channels coupled to a dual beam antenna for processing signals returned from a single target. The output of

A radar system for determining not only the azimuth and range of a target but also the target height over a predetermined range of elevation angles has separate receiving and signal processing channels coupled to a dual beam antenna for processing signals returned from a single target. The output of each signal processor is coupled to a height processor which divides the sum of the received signals into the difference of the two signals. The resulting ratio is used to access a look-up table to identify the elevation angle associated with the ratio from which the height of the target is calculated. The look-up table includes correction values to compensate for the antenna pattern nonlinearity.

대표청구항 ▼

A radar system for determining azimuth, range and height of a target over a predetermined range of elevation angles comprising: means for transmitting a radar signal including a dual beam antenna having a high beam pattern and a low beam pattern; first means coupled to said transmitting means for co

A radar system for determining azimuth, range and height of a target over a predetermined range of elevation angles comprising: means for transmitting a radar signal including a dual beam antenna having a high beam pattern and a low beam pattern; first means coupled to said transmitting means for converting a return signal of said target from said high beam pattern to an amplitude sample Ma(i), said first converting means comprises a first receiver means for producing vector data from said high beam return signal and a first processor means coupled to said first receiver means for determining said amplitude sample Ma(i); second means coupled to said transmitting means for converting a return signal of said target from said low beam pattern to an amplitude sample Mb(i), said second converting means comprises a second receiver means for producing vector data from said low beam return signal and a second processor means coupled to said second receiver means for determining said amplitude sample Mb(i); and means coupled to said amplitude sample outputs Ma(i) and Mb(i) of said first converting means and said second converting means for processing said outputs to determine said height of said target.