Compact and effective 2m/70cm dual band antenna for satellite operation

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