Design a composite high pass filter by image parameter method with following specifications:-

Cut-off frequency: 50MHz

Infinite attenuation pole: 48MHz

Characteristic impedance Rc: 75Ω

Step 1: To find the component values of constant K- LPF

$R_0=\sqrt\frac{L}{C}$

$L=R_0/2w_c = Ro / 4πf_c = 2.98 microH$

$C = 1/2R_0W_0 = 1/R_02πf_c=530.5 pF$

Step 2: to find Component Values of M-derived LPF

a) $M = \sqrt{{1}-\{{Fc/F0}\}^2}=0.22$

b) $2C/M = (2 × 530.5 × 10^{-12})/0.22 = 4.78nF$

c) $L/M = 13.42 microH$

d) $((4M) / (1-M^2)) × C = 490.5 pF$

Step 3: To find Component values for I/P and O/P matching Section [m=0.6]

2C / M = 1.77nF

2L / M = 9.93 microH

((2M) / (1-$M^2$)) x C = 994.7 pF