Want to get the multitone RF signal(maybe hundreds MHz),and the amplitude and the phase of each tone can be adjusted. How about the schematic or which IC can be used?
You could consider using an ADF4351/ADF4355 for each tone and then using a combiner to create the multi-tone signal. Each ADF4351/ADF4355 has phase control and coarse (3 dB step) amplitude control. Make sure you have sufficient isolation between each part to avoid injection locking or interference.
The AD9361 may also be suitable. The part is capable of much more, but you could just use the features you need.
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