SAR processing with stepped chirps and phased array antennas.

Doerry, Armin Walter

Sandia National Laboratories

关键词: Signals And Signaling.;    Data Processing;    Time Delay Phased Array Antennas.;    Synthetic Aperture Radar.;    Phased Array Antennas.;   

DOI  :  10.2172/893561
RP-ID  :  SAND2006-5855
RP-ID  :  AC04-94AL85000
RP-ID  :  893561

美国|英语

来源: UNT Digital Library

【 摘 要 】

Wideband radar signals are problematic for phased array antennas. Wideband radar signals can be generated from series or groups of narrow-band signals centered at different frequencies. An equivalent wideband LFM chirp can be assembled from lesser-bandwidth chirp segments in the data processing. The chirp segments can be transmitted as separate narrow-band pulses, each with their own steering phase operation. This overcomes the problematic dilemma of steering wideband chirps with phase shifters alone, that is, without true time-delay elements.