With satellite competition growing exponentially, advanced virtual prototyping and design platform techniques are needed to keep pace. RF system architects, array antenna designers, RF module designers, DSP engineers, and system test engineers need to collaborate and stay connected to meet system requirements that are rapidly changing. Design teams need to drill down into any part of a design, measure components and bring results back into the system model to simulate with higher fidelity than ever possible. This session will illustrate how to meet these needs by performing an RF COTS (Commercial off-the-shelf) design and validating performance in the RF domain using PathWave System Design. Design of a 3D/conformal array to be used on the LEO satellite is proposed. It will show how to use industry recognized STK scenario modelling to incorporate a dynamic channel model with complex modulated waveforms. Finally analyses using the same algorithm as the Test and Measurement hardware using the PathWave Vector Signal Analysis (VSA) Software will be demonstrated