基于Colpitts振荡器的超宽带混沌雷达测距实验研究

n ultra-wide bandwidth chaotic radar for target detection and ranging using a Colpitts oscillator is proposed. The chaotic signal with a full width at half maximum of 0.5ns is generated from an improved Colpitts oscillator, and then range resolution provided is 7.5cm. Ranging to target is achieved by the cross-correlation between the echo signal reflected from targets and the reference signal. The performance of the chaotic radar for single target ranging in free space and through obstacles is explored experimentally, and the image of the target is obtained by scanning and using Back-Projection algorithm. The results show that the chaotic radar system presents high range resolution and good wall penetration characteristics. Moreover, two-dimensional target image can be obtained by using synthetic aperture technique.