AERIAL, BED-SPRINGS.--Where an outdoor aerial is not practicable bed-springs are often made to serve the purpose.
AERIAL CAPACITY.--See Capacity, Aerial.
AERIAL COUNTERPOISE.--Where it is not possible to get a good ground an aerial counterpoise or earth capacity can be used to advantage. The counterpoise is made like the aerial and is supported directly under it close to the ground but insulated from it.
AERIAL, DIRECTIONAL.--A flat-top or other aerial that will transmit and receive over greater distances to and from one direction than to and from another.
AERIAL, GROUND.--Signals can be received on a single long wire when it is placed on or buried in the earth or immersed in water. It is also called a ground antenna and an underground aerial.
AERIAL, LOOP.--Also called a coil aerial, coil antenna, loop aerial, loop antenna and when used for the purpose a direction finder. A coil of wire wound on a vertical frame.
AERIAL RESISTANCE.--See Resistance, Aerial.
AERIAL SWITCH.--See Switch Aerial.
AERIAL WIRE.--(1) A wire or wires that form the aerial. (2) Wire that is used for aerials; this is usually copper or copper alloy.
AERIAL WIRE SYSTEM.--An aerial and ground wire and that part of the inductance coil which connects them. The open oscillation circuit of a sending or a receiving station.