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LOGPERIODIC DIPOLE ARRAY |
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ARRL antenna book 15th edition p.10-4,10-5
OH3FG/KO4BC June 18, 1993Give values only those fields marked with BOLD |
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Constants Tau and Sigma defines physical appearance of the antenna.
Greater values mean bigger antenna with more gain. |
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The Tau should be 1>tau>=0.8 |
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It is not necessary to give a Sigma. If you leave it blank, the
computer will calculate a value for it. |
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The calculated value will be the value for max gain for given Tau. |
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If you decide to give Sigma, make it 0.22>sigma>=0.06 |
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Lowest frequency |
140.000 |
MHz |
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Highest frequency |
950.000 |
MHz |
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Tau |
0,80 |
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(Sigma) |
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Feeder Z |
60,00 |
ohm |
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Boom Dia. |
15,00 |
mm |
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Distance of Boom halves |
29,95 |
mm |
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Gain Appox. |
8,3 |
dBi |
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metric dimesions |
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Element |
Length |
Half |
Dist. fr. prev. el |
From Boom end |
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13 |
1,071 |
0,536 |
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0,268 |
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12 |
0,857 |
0,429 |
0,307 |
0,575 |
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11 |
0,686 |
0,343 |
0,246 |
0,821 |
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10 |
0,549 |
0,274 |
0,197 |
1,018 |
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9 |
0,439 |
0,219 |
0,157 |
1,175 |
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8 |
0,351 |
0,176 |
0,126 |
1,301 |
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7 |
0,281 |
0,140 |
0,101 |
1,402 |
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6 |
0,225 |
0,112 |
0,081 |
1,482 |
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5 |
0,180 |
0,090 |
0,064 |
1,547 |
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4 |
0,144 |
0,072 |
0,052 |
1,598 |
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3 |
0,115 |
0,058 |
0,041 |
1,639 |
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2 |
0,092 |
0,046 |
0,033 |
1,672 |
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1 |
0,074 |
0,037 |
0,026 |
1,699 |
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0 |
0,000 |
0,000 |
0,000 |
0,000 |
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0 |
0,000 |
0,000 |
0,000 |
0,000 |
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El. material tot. |
5,06 |
m |
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Total boom length |
1,70 |
m |
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