For the simplest case of real input, R_in, to real output impedance R_out, there are two possibilities: R_in > R_out or R_in < R_out. The two L topologies to accomplish this are:

Figure 1 – Matching Topologies

Figure 2 – Amplifier Chain

If we assume the Z_out is real R₂, Z_in is real R_1, and R₂ > R₁ (the left-side topology in Figure 2) we can use the Norton transformation to get:

For example, to match R1 = 50Ω to R2 =1000Ω at 100 MHz:

choosing the positive root to use a shunt capacitor for a lowpass implementation, then:

For R₂ < R₁, simply swap R₂ for R₁ in the above calculations. The useful bandwidth of the match will depend on the ratio of R₂ to R₁. Extreme transformations result in very narrow bandwidth results. A broader band match may be implemented using more L-C elements [1] [2].

See this and more important radio frequency charts and formulas in this comprehensive application note. 

[1] G.L. Matthaei, “Tables of Chebyshev impedance–transforming networks of low-pass filter form”, Proceedings of the IEEE, Vol 52, Issue 8

[2] R.M. Fano, “Theoretical limitations on the broadband matching of arbitrary impedances”, Journal of the Franklin Institute, Vol 249, Jan 1950, pp 57-83