Calculating the bandwidth of sensing system

Dear All,

I am having a problem to calculate the bandwidth of my sensing system. The bandwidth of the system is already calculated. The equation is looks like this: !Ѱ(jw)!=2*k*q1*tau{!sinw(b/2v)!/(w^2*tau^2+1)^1/2. I am assuming that I can get the lower and upper operating frequencies. I shall be very thankful if somebody help me to solve my problem.