(1) Waveguide is a hollow pipe, usually rectangular, used to guide
(2) Waveguide is a very efficient transmission medium because it has
very little loss of energy.
(3) Waveguide is used principally
antennas, test equipment, and dummy loads.
(4) A choke joint is a device used to join two sections of waveguide.
(5) Waveguide bends are smooth or mitered.
(7) Flexible waveguide is usually used when a loss of energy can be
(8) Waveguide must be tuned to prevent serious reflections.
Learning Event 2:
You know that radar operates on the echo principle. The magnetron
generates short regularly-spaced RF pulses when excited by short DC pulses
from the modulator. These high-power RF pulses are transmitted into space
in a narrow beam from a directional antenna (Figure 131). A target in the
path of the radar beam sends back some of the RF energy in the form of
echoes. The antenna intercepts these echoes and directs them to a sensitive
receiver and finally to the radar indicator.