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#1
April 5th 06, 07:35 AM
posted to rec.radio.amateur.antenna
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Thin & Fat Yagis
Take 2 Yagis or verticals built with aluminum tubing. Both are identical
except the tubing in one is twice the diameter of the other. Besides size, what will the property differences be between the two? Will they load up the same? I don't mean to be flippant, but this question has been on my mind for a long time and I couldn't find the answer. All comments appreciated. Thank you. 73's, west AF4GC |
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#2
April 5th 06, 02:26 PM
posted to rec.radio.amateur.antenna
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Thin & Fat Yagis
"west" wrote in message om... Take 2 Yagis or verticals built with aluminum tubing. Both are identical except the tubing in one is twice the diameter of the other. Besides size, what will the property differences be between the two? Will they load up the same? I don't mean to be flippant, but this question has been on my mind for a long time and I couldn't find the answer. All comments appreciated. Thank you. 73's, west AF4GC If the lenghth of the elements is the same and diameter is thicker, then the antenna with thicker elements will resonate lower on frequency. You need to shorten the elements on the fat one to bring it back to resonance. The fater elements provide broader bandwidth too and take more punishment. Yuri, K3BU |
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#3
April 8th 06, 02:59 AM
posted to rec.radio.amateur.antenna
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Thin & Fat Yagis
west wrote:
Take 2 Yagis or verticals built with aluminum tubing. Both are identical except the tubing in one is twice the diameter of the other. Besides size, what will the property differences be between the two? Will they load up the same? I don't mean to be flippant, but this question has been on my mind for a long time and I couldn't find the answer. All comments appreciated. Thank you. 73's, west AF4GC If I'm not mistaken ( a dubious assumption ), I seem to remember that "fatter" elements produce wider bandwidths (i.e., lower SWR over greater range of frequency). If this is not the case, please correct me. John AB8WH |
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