User`s manual

SG-211 User’s Manual
© 2004 SGC Inc. Page 17
3.4.2 The Inverted V Antenna
The Inverted-V
antenna can be fed
with ladder line run
from the balanced line
connection on the SG-
211. It is also
commonly fed from
coaxial cable with the
center conductor to one side and the shield to the other.
3.4.3 Dipoles with Matching Lines
Some antennas, such as the G5RV, use a section of ladder
line as a matching device. The ladder line transforms the
feed point impedance to something near 50 ohms at the
antenna’s design frequency. Usually, the ladder line
terminates in a 1:1 balun. Coaxial line from the
transceiver connects to the balun.