mutual48
Newbie level 3
i have some question :
1. i have pameters, i got from the formulas λ = C/f , D = C/π , α = arctan S/C , L = C/cos〖α 〗 , G = k 12 Cλ2 n Sλ , long axis = n x S , then i simulate with supernec , i got the gain -2dB , and radiation pattern there's much back lobe. Is there somethin wrong with the formulas? and anybody have article bout count the helical parameter?
2. because i was out of curiousity, i tried to make the helical with the parameters before, i used copper as a convolution and the diameter the copper was 2mm. then i gave 5Volt. Then my helical design cant work, but VSWR measurement is 1. how the solution?
I am just learning about the antenna. I need the solution..
:idea:
1. i have pameters, i got from the formulas λ = C/f , D = C/π , α = arctan S/C , L = C/cos〖α 〗 , G = k 12 Cλ2 n Sλ , long axis = n x S , then i simulate with supernec , i got the gain -2dB , and radiation pattern there's much back lobe. Is there somethin wrong with the formulas? and anybody have article bout count the helical parameter?
2. because i was out of curiousity, i tried to make the helical with the parameters before, i used copper as a convolution and the diameter the copper was 2mm. then i gave 5Volt. Then my helical design cant work, but VSWR measurement is 1. how the solution?
I am just learning about the antenna. I need the solution..
:idea: