(O)Element 3-93 Antennas and Waveguides Flashcards
1
Q
How does the gain of a parabolic dish antenna change when the operating frequency is doubled?
A
gain increases 6 dB
2
Q
What type of antenna or pickup device is used to extract the RADAR signal from the wave guide?
A
J hook
3
Q
What happens to the beamwidth of an antenna as the gain increases?
A
The beamwidth decreases as the gain is increased
4
Q
A common shipboard RADAR antenna is the
A
slotted array antenna
5
Q
Conductance takes place in a waveguide
A
through electro static and electromagnetic in the walls int he wavedguide
6
Q
To couple energy into and out of a waveguide used
A
a thin piece of wire as an antenna
