Construction of Yagi – Uda MCQ’s

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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 islr, lde, ld, respectively then the order in the increasing order of their lengths is _____
a) lr, lde, ld
b) ld, lde, lr
c) lde, lr, ld
d) lr, lde, lde

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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