用频谱分析仪测量变频系统的天线方向性图: 20090316_a033a27a3345d14e59baeBrgOzgMBomx.jpg

Pattem measurements using a network analyzer are typically based on measuring the transmission coefficient, S21' When
the transmitting and receiving frequencies are different, it is not possible to directly measure the antenna pattern using a
network analyzer. In this paper, an antenna-pattern measurement system using a spectrum analyzer, designed to measure
the radiation pattern of an antenna with a microwave sampling beamformer (MSBF) structure, is presented.

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谢谢楼主好资料，学习和动手去

应该学习！