# Uniform Aperture Field MCQ’s

This set of Antenna Multiple Choice Questions & Answers (MCQs) focuses on “Uniform Aperture Field”.

1. At which of the following frequencies aperture antennas are operated?
a) UHF and EHF
b) MF and HF
c) HF and UHF
d) LF and MF

2. Which of the following does not belong to the aperture antenna?
a) Half-Dipole
b) Horn Antenna
c) Waveguide antenna
d) Slot antenna

3. For aperture antenna to be efficient and have high directivity, its area should be ____________
a) ≥ λ2
b) ≥ 1/λ
c) ≤ λ2
d) ≤ λ

4. Which of the following principle is used for analysis of aperture antennas?
a) Equivalence principle
b) Friss Equation
c) Reflectivity
d) Diffraction

5. Which of the following condition is true for the electric conductor equivalent?
a) Js=n×H=0;Ms=-n×E
b) Js=n×H;Ms=-n×E=0
c) Js=n×H≠0;Ms=-n×E
d) Js=n×H≠0;Ms=-n×E=0

6. Equivalence principle is mainly used for far filed analysis of the antenna in outer region.
a) True
b) False

7. Equivalence Principle follows which f the following theorem?
a) Uniqueness Theorem
b) Poynting theorem
c) Friss Theorem
d) Gauss theorem

8. Which of the following condition is true for the magnetic conductor equivalent?
a) Js=n×H=0;Ms=-n×E
b) Js=n×H;Ms=-n×E=0
c) Js=n×H≠0;Ms=-n×E
d) Js=n×H≠0;Ms=-n×E=0

9. The gain of the aperture antenna increases with square of the frequency.
a) True
b) False

10. Huygens principle in mathematical form is referred to as equivalence principle for aperture antennas.
a) True
b) False

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