A method for controlling alignment of an inner conductor (14) and an outer conductor (12) of a coaxial cable of a microwave antenna comprises changing a temperature of at least one thermally responsive material (16,18) disposed between an inner conductor (14) and an outer conductor (12) of a coaxial cable (10) of a microwave antenna. The change in temperature of the at least one thermally responsive material alters alignment of the inner conductor within the outer conductor.
