HF high Ratio Transformer

hi friends
i want to design a 4MHz Current Sense transformer which can sense about 4 Ampers. can i use a 1:100 transformer? is there any refrence that i can study more about RF transformers?

thanks Sedighe

I usually mention that current tranformers are ruled by the same relations as any transformer and can be calculated as such. For a a high frequency transformer, particularly the stray or leakage inductance and secondary parallel capacitance are defining the upper cut-of frequency. Snellings Soft ferrites is probably one of the best books regrading wide band and pulse transformers.