Nowdays circularlypolarized technology is one of important branchs in the microstrip antenna of field, it is used in the communications and electric antagonizes.
圆极化技术作为微带天线理论和应用的一个重要分支，近年来在通信及电子对抗等领域中得到广泛应用。
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Then Larmor precession of the atom under the action of circularly-polarized light and outside magnetic field is analyzed.