| 摘要 |
The invention provides a radar system for a Synthetic Aperture Radar, SAR, comprising an arrangement of at least one transmitter, two receivers, two antennas and signal processing means located on a platform. The platform is arranged to move over ground and arranged to transmit a known signal shape and receive signals reflected from the ground. The received signals are used to produce a SAR image of the ground. The SAR image comprises a number of resolution cells. The radar system is further arranged to operate in a frequency band with a centre frequency f c and with a wide bandwidth B of at least one octave wherein the radar system comprises a first and a second antenna having a length of less than half the wavelength of the centre frequency f c. The radar system is further arranged for: .cndot. a radar system transfer function F f to be flat over the frequency band B and .cndot. one-sided beam forming with wideband antenna gain. The invention also provides a corresponding method. |
