Look up formula for air coil inductor, standard formulas. Then get some insulated wire and coil one up. Now you didn't explain any of the parameters such as resistance, capacitance, size, power.
In any event start by Yahoo or Google, " air coil inductor formulas." There is a Wiki page which is pretty good. One formula:
Short air-core cylindrical coil[12] L= (r^2 * N^2) / {9r+10A}
L = inductance (µH)
r = outer radius of coil (in)
l = length of coil (in)
N = number of turns
A = length of winding ( in inches )
