Baed on the theory Of linear system,the imaging resolution both for ideal and practical cases is discussed It turns out that for ideal case the point spread function(PSF)of imaging system is Dirac function.

• 然后从线性系统的角度出发，研究了理想情况和实际情况下转台模式近场微波成像的分辨特性，理想情况下成像系统的点扩散函数（PSF）就是狄拉克－函数。 PSF的数值模拟结果表明：实际情况下，扫描频带越宽分辨率越高。