HF-Komponenten Product Top Page Tech Notes Technical Support Tools FAQ TVCL - TDK Virtual Component Library The TVCL is simulation model that reproduce the characteristics of TDK electronic components in circuit simulators. Chip Antenna Simulation Simulations of VSWR, efficiency, radiation patterns, and matching element values can be performed based on the lengths and widths of substrates that chip antennas are mounted on as well as their mounting positions.