The latest version of Windows-compatible MWI-2010 microwave impedance calculator software is available for free download from the company’s website. The program promises fast and easy calculations of essential transmission-line parameters and employs closed-form equations to determine impedance and loss of a range of circuits including microstrip and stripline designs. Analysis begins by selecting a transmission-line technology and a high-frequency circuit-board material. The program displays pertinent parameters for each material including dielectric constant, dissipation factor (loss), coefficient of dielectric constant, and thermal conductivity. ROGERS CORP., Rogers, CT. (860) 779-4045.