barrier-grid
barrier-injection
barrier-layer
barrier-level
barrier-transmission
bar-segment
bar-to-bar
basal
base
base-band
  baseband
base-bias
baseboard
base-centered
base-collector
base-conductivity
base-coupled
based
base-diffusion
base-emitter
base-form

    baseband spectrum

     спектр модулирующего сигнала

     групповой спектр