Cage aerial

A cage antenna (British cage aerial) is a radio antenna where a conventional design has been augmented by replacing a single long conductor with several parallel wires, connected at their ends, and held in position by ring spacers or support struts mounted on a central mast (if any).

The "cage" is either mounted around a central mast (either conducting or non-conducting) or suspended from overhead wires.

A few examples of areal made of cage sections are: In 1921, an amateur radio operator tried to win a $500.00 prize with his cage aerial.

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Historic Radio Engineers Club station, Riverhead, New York , in 1922; a cage T-antenna 60 ft high by 90 ft long. The conductor is made of a "cage" of 6 wires held apart by wooden spreaders; this increased capacitance and decreased ohmic resistance . This antenna achieved transatlantic contacts on 1.5 MHz, at a power of 440 W.
Shortwave quadrant antenna made of two horizontal cage sections. [ 1 ]