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#4
January 14th 08, 04:29 PM
posted to rec.radio.amateur.antenna
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folding a dipole in half
Richard Harrison wrote:
No counterpoise needed. Its called a "folded quarter wave dipole". Its first resonance is due to its 1/2-wave circumference. Its input resistance is not 300 ohms but 600 ohms. Its gain is 0,5 dB less than the 1/2-wave dipole. This information is from "TV and Other Receiving Antennas" by Arnold B. Bailey. You might want to feed it with 450 ohm ladder line. Ok, thanks. Geoff. -- Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM IL Voice: (07)-7424-1667 U.S. Voice: 1-215-821-1838 Visit my 'blog at http://geoffstechno.livejournal.com/ |
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