ADS (Advanced Design System) from Keysight is an electronic design automation software for RF, microwave, and high speed digital applications. It uses some of the most innovative and commercially successful technologies, including Harmonic Balance, Circuit Envelope, Transient Convolution, Keysight Ptolemy, X-parameter, Momentum and 3D EM simulators (including both FEM and FDTD solvers).

ADS provides full, standards-based design and verification with Wireless Libraries and circuit-system-EM co-simulation in an integrated platform for WiMAX, LTE, multi-gigabit per second data links, radar, & satellite applications. ADS combines schematic, layout, circuit, electro-thermal co-simulation and three full-wave 3D EM technologies for IC, package, laminate/PCB and 3D EM component co-design in a single-vendor, integrated platform solution.