| Γ | = S − 1 S + 1 = 3 − 1 3 + 1 = 2 4 = 0 . 5 Z L = R L − jX C , where X C = 1 ω C . Γ = Z L − Z 0 Z L + Z 0 | Γ | 2 = ·μ Z L − Z 0 Z L + Z 0 ¶μ Z ∗ L − Z 0 Z ∗ L + Z 0 ¶̧ | Γ | 2 = Z L Z ∗ L + Z 2 0 − Z 0 ( Z L + Z ∗ L ) Z L Z ∗ L + Z 2 0 + Z 0 ( Z L + Z ∗ L ) Noting that: Z L Z ∗ L =( R L − jX C )( R L + jX C )= R 2 L + X 2 C , Z 0 ( Z L + Z ∗ L )= Z 0 ( R L − jX C + R L + jX C )= 2 Z 0 R L , | Γ | 2 = R 2 L + X 2 C + Z 2 0 − 2 Z 0 R L R 2 L + X 2 C + Z 2 0 + 2 Z 0 R L . Upon substituting | Γ L | = 0 . 5, R L = 75 Ω , and Z 0 = 50 Ω , and then solving for X C , we have X C = 66 . 1 Ω . Hence C = 1 ω X C = 1 2 π × 10 7 × 66 . 1 = 2 . 41 × 10 − 10 = 241 pF .