Microwave Office supports the design of RF passive components such as filters, couplers, and attenuators, as well as active devices operating under small-signal (AC) conditions such as low noise and buffer amplifiers. The linear configuration provides simulation of S-parameters (Y/Z/H/ABCD), small-signal gain, linear stability, noise figure, return loss/voltage standing wave ratio (VSWR), and more, as well as real-time tuning, optimization, and yield analysis. All E-series Microwave Office portfolios include synchronous schematic / layout editors, 2D/3D viewers, comprehensive libraries of high-frequency distributed transmission models, surface-mount vendor component RF models with footprints, measurement-based simulations, and RF plotting. Microwave Office PCB enables linear and nonlinear RF circuit design with the robust APLAC HB simulator and its powerful multi-rate HB, transient-assisted HB, and time-variant simulation engine, supporting analysis of RF/microwave circuits.