Abstract: With the rapid development of wireless communications, there will be many communication standards in the future, which may cost much to buy the corresponding vector microwave signal generator. Hence, this study investigated a novel vector microwave signal generation method, which modeled the vector baseband signal by the CAD software (Agilent ADS) and then control the conventional microwave signal generation hardware to output vector microwave signals. Compared with the specified vector microwave signal generator developed by Agilent, Anritsu, etc., our software-controllable microwave signal source is cheaper, more flexible and more convenient. Moreover, as an application of our method, we model and realize the TD-SCDMA baseband signal corrupted by multipath channel and Additive White Gaussian Noise (AWGN) in ADS software and then control the hardware (Agilent E4432B) to generate the TD-SCDMA microwave signals. The measurements of the TD-SCDMA microwave signals approve the validity of our method.