Propagation constant a conductor. The skin effect causes R along the conductor to be approximately dependent on frequency according to Losses in the dielectric depend on the loss tangent (tan "δ") of the material divided by the wavelength of the signal. Thus they are directly proportional to the frequency. The attenuation constant for a particular propagation mode in an optical fiber is the real part of the axial propagation constant. In electromagnetic theory, the phase constant, also called phase change constant, parameter or coefficient is the imaginary component of the propagation constant for a plane wave. It represents the change in phase
The Crests group continued as a trio of Carter, Ancrum, and Lewis and became a lounge act, disbanding in 1978. Carter went to sing with Charlie Thomas' Drifters for a year, then moved to Plainfield, New Jersey, to teach voice and set up his own recording studio. In 1973, Carter met his wife Leona, an accomplished classical pianist/composer. Leona Carter has been a part of The Crests since then. Carter reformed The Crests in 1980, auditioning over 200 singers at his studio, finally settling on lead Bill Damon (a Maestro sound-alike), Greg Sereck, Dennis Ray and New York drummer, Jon Ihle. The