Antennas Flashcards
A vertical whip antenna has a radiation pattern defined by?
A circle
Why is the antenna tuner required for MF-HF transmissions?
The length of the physically fixed antenna must be electrically matched to the intended frequency of operation.
A vertical quarter wave antenna with a good ground connection will:
Radiate omni-directionally.
What is the most common type of antenna for GMDSS MF-HF?
Vertically polarized whip antenna
What is the purpose and function of the antenna coupler?
All of these: Electrically matching the antenna system to the transmit frequency. Changing the overall length of the antenna system (in addition to the fixed length whip). Enabling maximum transmitted signal on the band chosen by the operator.
What advantage does a vertical whip have over a long wire?
It radiates equally well in all directions.
