Transcription of G7FEK Limited Space Antenna - Suomen …
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G7FEK Limited Space Antenna - Suomen …
1988 - 2009 Mike Dennis, G7 FEK. - - updated: 27 March 2010G7 FEK Limited Space AntennaG7 FEK Multi-band Nested Marconi Antenna - 2008 Version (rev 5)This Antenna was first conceived as a simple dual band Antenna in 1988, in an attempt to achieve sensible dual band operation ina small garden of 14m (46 ft) length. Evolving from a simple end-fed Marconi for 80m, the idea was to use the opposing harmonicrelationships of two wave elements so that they could be fed on odd harmonics without mutual coupling. This principle has beenused with nested dipole antennas and other specialist multi-band antennas such as the Cobweb, but because of interaction andcoupling issues, it s rarely implemented on end fed wire antennas. With this version of the Antenna , interaction between elementsand top resonance have been turned to our advantage allowing for excellent multi-band working, while maintaining a usefulradiation pattern and efficiency on almost all Amateur Radio suggested dimensions provide for low radiation angle (30 to 40 degrees) on all bands except 30m where the Antenna acts as afull size horizontal dipole.
© 1988 - 2009 Mike Dennis, G7FEK. - Website: www.g7fek.co.uk - updated: 27 March 2010 G7FEK Limited Space Antenna G7FEK Multi-band “Nested Marconi” Antenna - 2008 Version (rev 5)
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