Influencing factor analysis of bistatic ISAR imaging quality

Bistatic inverse synthetic aperture radar (ISAR) is an ISAR system whose transmitter and receiver are placed in different places. The configuration mode makes it have some differences with monostatic ISAR. Combined with the reality of bistatic ISAR, the paper analyzed the two important factors, signal to noise ratio (SNR) and bistatic angle, who affect the imaging quality. The equal SNR curve of bistatic ISAR is Cassini's Oval whose focus are transmitter and receiver, and the equal bistatic angle curve is a series of circular arc whose center is on the vertical bisector of bistaic baseline and pass the bistatic radar. To ensure the imaging quality, if the echo has enough SNR, the imaging segment should choose the area far from the vertical bisector of based line. The research in this study provides significant evidence for the selection of imaging segment.