Below are the simulation results for a CoCo (8-Elements, made of coax VF=0.86).
These results show how a 1 or 2 mm error in element length can grossly affect SWR and Radiation pattern.
Gain is relatively less affected by 1 or 2 mm error.
The error in element length can either due to using wrong VF, or wrong cutting or a combination of both.
In this simulation the a VF of 0.86 was used, giving element length 118 mm.
SWR vs Element Length
Gain vs Element Length
Radiation Pattern vs Element Length
These results show how a 1 or 2 mm error in element length can grossly affect SWR and Radiation pattern.
Gain is relatively less affected by 1 or 2 mm error.
The error in element length can either due to using wrong VF, or wrong cutting or a combination of both.
In this simulation the a VF of 0.86 was used, giving element length 118 mm.
SWR vs Element Length
Gain vs Element Length
Radiation Pattern vs Element Length
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