Build a 3 pole dB chebyshev with f_c=155MHz and R_s=R_l=50\Omega C_1=\frac1{2\pi f_cR_0}c_1;\ L_2=\frac{R_0}{2\pi f_c}l_2;\ etc\
f_c=155MHz
R_s=R_l=50\Omega