Radar engineering

The angle of a target is detected by scanning the field of view with a highly directive beam.

Figures of merit of an ESA are the bandwidth, the effective isotropically radiated power (EIRP) and the GR/T quotient, the field of view.

A constant phase shift over frequency has important applications as well, albeit in wideband pattern synthesis.

receive patterns depends on a feed network which combines two subarrays using a wideband hybrid coupler.

It this case, the emission has to be insulated from the reception sensors as the energy emitted is far greater than the returned one.

The radar frequency is selected based on size and technology readiness level considerations.

Radar modes for distributed targets include ground mapping and imaging.