Cage aerial

Last updated
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. Amateur T cage antenna 2BML 1922.jpg
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.

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.

Contents

Examples

A few examples of areal made of cage sections are:

Shortwave quadrant antenna made of two horizontal cage sections. Reusenantenne-Wertachtal-Bild2.jpg
Shortwave quadrant antenna made of two horizontal cage sections.
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

In 1921, an amateur radio operator tried to win a $500.00 prize with his cage aerial. [3]

References

  1. ↑ "Rundfunksender in Bayern" [Radio station [antenna] in Bavaria]. wabweb.net (in German). Retrieved 2024-11-09.
  2. ↑ "Kurzwellensender Moosbrunn bei Wien" [Moosbrunn shortwave transmitting [antenna] near Vienna]. www.wabweb.net (in German). Retrieved 2024-11-09.
  3. ↑ 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

See also

This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.