The changeover of many test ranges from Sband to C-band telemetry implies the need to modify or replace current systems. Several antenna-related issues need to be considered in to order facilitate a smooth transition to C-band. Amongst these are changes in vehicle-induced pattern degradation, the effect on increased propagation loss on link budgets, and the potential need for multi-band antennas that also support legacy systems during the transition. This Paper discusses these issues for both existing telemetry systems modified for C-band and for new systems. Conformal and nonconformal antennas will be addressed in this discussion. By David Farr