Smith Designer

A3DComm

About this app

Smith Designer is a powerful and interactive Smith Chart tool for RF and Microwave professionals, students, and hobbyists. Design, analyze, and optimize impedance matching networks directly on your mobile device.

A Smith Designer Lite version is available.
Windows versions, Lite and full-featured, are also available.

Key Features:
• Interactive Smith Chart: Visualize impedance trajectories with real-time updates.
• Schematic Editor: Drag-and-drop interface for L, C, R, Transmission Lines (Physical/Electrical), Transformers, and S2P blocks.
• Amplifier Design: Overlay Gain Circles (Ga, Gp), Stability Circles, and Noise Circles to design LNAs and PAs. Unilateral conjugate match visualization.
• Real-Time Tuning: Tune components via sliders or by dragging points directly on the chart. Memory Traces let you compare before/after states.
• Auto Match: Automatically synthesize L-network matching circuits.
• Optimization: Gradient descent optimizer to fine-tune component values.
• Impedance Profiles: Define complex, frequency-dependent Source and Load impedances using S1P files.
• Box Zoom: Right-click and drag to zoom into specific regions of the Smith Chart.
• Data Explorer: Analyze RF data like never before. Import Touchstone (.sNp), MDIF, and Load Pull files. Visualize S-parameters, Noise Figure, and Load Pull contours on Cartesian, Polar, and Smith charts. Use the innovative Smith Tube 3D view to analyze load pull performance across frequency. View 3D antenna radiation patterns with interactive rotation and polar cuts.

Analysis & Simulation:
• Frequency Sweep: Plot S-Parameters, Return Loss, and Group Delay over bandwidth.
• Monte Carlo Analysis: Simulate manufacturing tolerances (Uniform, Gaussian, Triangular) to ensure design robustness. Supports frequency sweeps for bandwidth yield analysis.
• Load Pull Contours: Import multi-frequency Load Pull and MDIF files. Frequency interpolation (nearest, linear, cubic spline). Filled contours with 5 color maps. Reference/contour plane transforms through the matching network.
• Vendor Libraries: Import component models (S2P/Murata LPB) directly into your design.

Advanced Tools:
• Trace Designer: Full 2D Boundary Element Method solver for PCB transmission lines — Microstrip, GCPWG, Stripline, Differential, Coated, and Embedded variants. Multilayer substrates, trapezoidal traces, conductor roughness models, impedance synthesis, and E-field visualization.
• Analytical Line Models: Closed-form Z₀, loss, and synthesis for Coaxial, Parallel Lines, Twisted Pair, Microstrip, Stripline, Grounded CPW, Rectangular Waveguide, and Circular Waveguide.
• Transmission Line Models: Constant Phase, Electrical Length, and Physical models with loss and velocity factor.
• Resonator & Attenuator Designers: Built-in calculators for common circuit blocks.

Export & Share:
• Export professional PDF reports with schematics, charts, and plots.
• Export designs as SPICE netlists.
• Save high-resolution PNG/SVG images.

Perfect for RF engineering coursework, ham radio antenna tuning, and professional circuit design. Unlock the power of the Smith Chart in your pocket!

Contact:
For support or feature requests, please contact us.

(c) A3DComm

What’s new

Several bug fixes and updates and a little late easter egg...try if you can find it.