You can use these calculators to calculate clearance angle, coupling, throught and return loss, VSWR ratio, and more..

Carrier to noise vs Eb/No

Clearance Angle Calculator
Enter all but one field of the top four and either one of the bottom two then press Calculate.

Coupler Calculator
Enter either the Coupling Loss or the Through Loss and the other will be calculated.

VSWR & Return Loss Calculator
Enter either the VSWR ratio or the Return Loss and the other will be calculated.

dB Calculator
Enter the number of watts or dB and the amount of dB to add or subtract.