Antenna was designed for SO-50 satellite operation.
It has gains 4 dBd on 2m and 6.5 dBd on 70cm bands and it is fed via single 50 Ohm cable (use as short as possible for comfortable operation)
All elements made from aluminium welding 3.2 mm rod.
4 mm material can be used with no problem.
For other diameters and frequencies I recommend to use wonderful
MMANA-GAL software.
Here's the antenna definition for MMANA-GAL basic.
Copy and paste the text between //////
(Menu > Edit > Antenna Definition window)
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*
436.0
***Wires***
9
0.0, -0.3495, 0.0, 0.0, 0.3495, 0.0, 0.0016, -1
0.281, -0.3495, 0.0, 0.281, 0.3495, 0.0, 0.0016, -1
0.0, 0.3495, 0.0, 0.1506, 0.3495, 0.0, 0.0016, -1
0.0, -0.3495, 0.0, 0.1506, -0.3495, 0.0, 0.0016, -1
0.1651, -0.3495, 0.0, 0.281, -0.3495, 0.0, 0.0016, -1
0.1651, 0.3495, 0.0, 0.281, 0.3495, 0.0, 0.0016, -1
0.1405, 0.16285, 0.0, 0.1405, -0.16285, 0.0, 0.0016, -1
0.302, 0.1622, 0.0, 0.302, -0.1622, 0.0, 0.0016, -1
0.477, 0.1476, 0.0, 0.477, -0.1476, 0.0, 0.0016, -1
***Source***
1, 0
w2c, 0.0, 1.0
***Load***
0, 1
***Segmentation***
800, 80, 2.0, 2
***G/H/M/R/AzEl/X***
0, 2.0, 3, 50.0, 120, 60, 0.0
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Antenna is optimised for satellite operation therefore calculations must be done in upper band sides (145.85 MHz and 436 MHz respectively)
73! de LY2SS