a typical squelch circuit cut off

an audio amplifier when carrier is absent    

In horizontal-dipole antenna, the polarization is

In horizontal-dipole antenna, the polarization is



in the horizontal direction

the transistor with the lowest noise figure in the microwave region is a

the transistor with the lowest noise figure in the microwave region is a

 MESFET

Normally, a linear class B RF power amplifier operates with a bias approximately equal to

Normally, a linear class B RF power amplifier operates with a bias approximately equal to


projected cut-off

Combination of modulator, channel, and detector.

Combination of modulator, channel, and detector.


 Discrete channel