GLOSSARY
Along
with descriptions and pictures, we have listed the technical
specifications for each antenna. The following glossary explains the
terms used:
Frequency:
The frequency range, in Megahertz (MHz), that the antenna
is tuned to cover.
The electrical design of the antenna. A full explanation of
half-wave, collinear and tuned dipole is here.
The gain figure that can be measured on the antenna. A full
explanation of gain is here.
Marine Gain:
The gain figures that some manufacturers use to market their
antennas. We have included these figures to allow “apples
with apples” comparisons.
VSWR:
Voltage Standing Wave Ratio – a measurement of how efficiently
the antenna is working at the frequency being tested. Our antennas
typically measure 1.2:1 or better, which is equivalent to 99%
efficiency.
DC Meter Reading:
The reading that a DC meter will give when a test is done
between the centre and the outer of the coax. The antennas
work on RF, not DC.