Vertical and mobile antennas

Omnidirectional antennas for base, vehicle and low bands.

The quarter-wave verticalA monopole over ground: the workhorse omnidirectional antenna.Radials and ground planesWhy a vertical needs a counterpoise and how many radials.5/8-wave and colinear antennasSqueezing gain out of a vertical.J-poles and Slim JimsEasy VHF/UHF verticals built from wire or ladder line.Mobile whips and loading coilsShort antennas that work on a vehicle.Multiband HF verticalsTrap, tuned and autotuned vertical designs.