Modeling 3D Qubits in Keysight's Advance Design System

Three-dimensional (3D) superconducting qubits are a critical advancement in quantum hardware design, offering enhanced coherence times and reduced sensitivity to environmental noise compared to their planar counterparts. By embedding transmon qubits within metallic cavities, engineers can leverage dispersive coupling and high-Q resonator architectures to achieve more stable quantum systems. QuantumPro, a tool within Keysight's Advanced Design System (ADS) 2026, offers a comprehensive platform for the design, simulation, and analysis of sophisticated qubit systems. Featuring an enhanced finite element analysis workflow within its eigenmode solver, QuantumPro allows for precise modeling of 3D qubits and facilitates seamless integration of packaging environments surrounding qubit circuits. This capability bridges planar circuit layouts with full 3D electromagnetic modeling, enabling accurate simulations of qubit circuits that can capture nuanced interactions between qubits and their enclosures. In this presentation, we demonstrate how ADS provides a package-aware design environment that enables quantum designers to perform realistic chip-in-package modeling, accelerating the development of scalable and reliable quantum processors.