Provided are a frame generation apparatus and method that may protect variable length header information in a wideband high frequency wireless system. The system has fast access and assignment procedures that allow the multiplexing of real-time, delay-critical data services with non-real-time data services. The base processes only the header field that needs to be transmitted along the payload, and transfers the processed portion along with the payload. The present invention uses a voice coil motor with a cylindrical moving coil and a cylindrical permanent magnet assembly with a radial gap.