Explanation Given: Wave is incident normally. Standing wave ratio value = 3. Appearance of electric field minimum z min = − 0.3 λ . Concept Used: First use the formula for the phase of the reflection coefficient z min = − 1 2 β ( Φ + π ) And β = 2 π λ to find the value of phase of the reflection co-efficient Φ , Use Γ = s − 1 s + 1 = η u − η 0 η u + η 0 to find the value of the impedance of unknown material. Calculation: Firstly, we use the minimum field z min to find the phase of the reflection co-efficient Φ , z min = − 1 2 β ( Φ + π ) Substitute value of β = 2 π λ , we will get − 0

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Chapter 12, Problem 12.11P

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The impedance of the unknown material.

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Chapter 12, Problem 12.10P

Chapter 12, Problem 12.12P

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