Generally speaking,Altium is not a good PCB package for RF circuits with the need of Transmission Lines,Microwave Elements such as Lange Couplers, Sheet Filters etc. Cadence Allegro+RF Option is a good choice for these types of layouts but it's quite expensive.

The operating frequenncy and the application of your design is not given by you. So that it is impossible to give clear advice.

Is there a RF design or a high speed digital design you need? And what is the function of this design.Onlu when you write clear about your question,we can answer clear.