# Construction of Yagi – Uda MCQ’s

This set of Antenna Multiple Choice Questions & Answers (MCQs) focuses on “Construction of Yagi – Uda”.

1. The length of the reflector compared to the driven element is ______

a) Greater

b) Smaller

c) Independent to each other

d) Depends on the type of driven element

2. The distance between directors of Yagi-Uda antenna is ____

a) 0.2λ

b) 0.49λ

c) 0.52λ

d) 0.62λ

3. The length of the director compared to the driven element is ______

a) Greater

b) Smaller

c) Independent to each other

d) Depends on the type of driven element

4. What is the approximate distance between directors for a Yagi-Uda antenna operating at frequency 150MHz?

a) 0.4m

b) 1.6m

c) 2m

d) 4.8m

5. For a feeder length of 0.5λ, which among the following would be the reflector length?

a) 0.525λ

b) 0.425λ

c) 0.23λ

d) 0.35λ

6. What is the reflector length (in feet) for a three element Yagi-Uda array, operating at a frequency 500MHz?

a) 2

b) 0.2

c) 1

d) 0.1

7. If length of the reflector, driven element, director isl_{r}, l_{de}, l_{d}, respectively then the order in the increasing order of their lengths is _____

a) l_{r}, l_{de}, l_{d}

b) l_{d}, l_{de}, l_{r}

c) l_{de}, l_{r}, l_{d}

d) l_{r}, l_{de}, l_{de}

8. If the input impedance of a half wave dipole Yagi-Uda is 73Ω, then input impedance of a half wave folded dipole as driven element is ____

a) 73Ω

b) 146Ω

c) 36.5Ω

d) 292Ω

9. What is the driven length (in feet) for a three element Yagi-Uda array, operating at a frequency 500MHz?

a) 0.95

b) 0.2

c) 1

d) 2

10. For a feeder length of 0.5λ, which among the following would be the director length?

a) 0.525λ

b) 0.455λ

c) 0.493λ

d) 0.55λ

11. What is the Director length (in feet) for a three element Yagi-Uda array, operating at a frequency 500MHz?

a) 0.91

b) 1

c) 2

d) 0.5

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