Sliding spotlight SAR (synthetic aperture radar) as well as implementing method and device thereof

The invention discloses a sliding spotlight SAR (synthetic aperture radar) as well as an implementing method and a device thereof. The implementing method of the sliding spotlight SAR comprises steps as follows: the maximum aspect angle and the antenna dimension of the sliding spotlight SAR are calculated on the basis of system parameters of the sliding spotlight SAR; the quantity of antenna subarrays, meeting the requirement of a first condition, of the sliding spotlight SAR is determined; a PRF (pulse repetition frequency) which meets requirements of a second condition and a third condition is determined; wave position information of the sliding spotlight SAR is acquired on the basis of the PRF meeting the requirements of the second condition and the third condition; key parameters of the sliding spotlight SAR are calculated on the basis of the wave position information of the sliding spotlight SAR; and when the key parameters of the sliding spotlight SAR meet the requirements of preset indexes, the quantity of the antenna subarrays of the sliding spotlight SAR is the quantity of the antenna subarrays meeting the requirement of the first condition, and the PRF of the sliding spotlight SAR is the PRF meeting the requirements of the second condition and the third condition. With the adoption of the technical scheme, the key parameters of the sliding spotlight SAR can be effectively designed, so that the sliding spotlight SAR can have higher resolution ratio and larger azimuth width.