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.
Examples
[edit]A few examples of areal made of cage sections are:
- Quadrant antenna
- A quadrant antenna is an omnidirectional shortwave transmitting antenna shaped like a rhombus or lozenge, made from two identical, opposing L-shaped cage dipoles ("L ⅂") lying in the same horizontal plane, aligned with their 'elbows' pointing in opposite directions ("‹ ›")
- Curtain antenna
- A curtain array antenna is a directional shortwave transmitting antenna made of several parallel-aligned dipoles, each made of cage sections.[2]
History
[edit]In 1921, an amateur radio operator tried to win a $500.00 prize with his cage aerial.[3]
References
[edit]- ^ "Rundfunksender in Bayern" [Radio station [antenna] in Bavaria]. wabweb.net (in German). Retrieved 2024-11-09.
- ^ "Kurzwellensender Moosbrunn bei Wien" [Moosbrunn shortwave transmitting [antenna] near Vienna]. www.wabweb.net (in German). Retrieved 2024-11-09.
- ^ Gernsback, Hugo (2016), Wythoff, Grant (ed.), "Results of the $500.00 Prize Contest: Who Will Save the Radio Amateur? (1923)", The Perversity of Things, Hugo Gernsback on Media, Tinkering, and Scientifiction, University of Minnesota Press, pp. 256–268, doi:10.5749/j.ctt1jktpxr.48, ISBN 978-1-5179-0085-4, JSTOR 10.5749/j.ctt1jktpxr.48, retrieved 2024-11-09