The Nine Fives Blog

Field notes on RF test automation, instrumentation, and building simple, networked, driverless test equipment.

HFSS animation of the electric field on the semi-circular three-section Wilkinson divider over one RF cycle

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How to vibecode a Wilkinson divider

How I used Claude Opus 5.5 with Qucs-S, openEMS and HFSS to design a 6–18 GHz multi-section Wilkinson power divider, from schematic to EM-verified layout.

October 5, 2026

Simulated surface current density on a coplanar waveguide with ground, animated over one RF cycle

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Transmission Line Tuning w/ HFSS

Using HFSS to tune a transmission line

July 9, 2026