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| To: | [email protected] |
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| Subject: | LF: 500 kHz loop antenna ? |
| From: | Rik Strobbe <[email protected]> |
| Date: | Fri, 11 May 2007 11:52:24 +0200 |
| Delivered-to: | [email protected] |
| In-reply-to: | <[email protected]> |
| References: | <001e01c7933b$4ae4a340$fe79a8c0@PCVONWALTER> <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
Dear all, did anyone try a loop antenna (for transmitting) on 500 kHz ?As the radiation resistance of a small loop increases with the 4th power of the frequency a loop should be about 22 dB more efficient on 500 kHz compared to 136 kHz. A rather modest 100 m^2 loop should have a radiation resistance of about 0.0024 Ohm and thus require only 6.5 A antennacurrent to get 0.1 W ERP. For a vertical the gain is "only" about 11 dB (plus whatever is gained from lower losses). 73, Rik ON7YD Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm |
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