4.4 Microstrip dipole

Quiz

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Displaying questions 1..5 of 10:

Question 1

Microstrip dipole etched on a microwave substrate …

Possible answers for question 1: … behaves the same way as a wire dipole completed by a plane reflector in vacuum.
… exhibits rather complicated behavior due to the wave reflections on the boundary of the dielectric substrate and the vacuum.
… behaves the same way as a wire dipole completed by a plane reflector in free space, which permittivity equals to the arithmetic average of the permittivity of vacuum and the permittivity of the substrate.
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Question 2

Green functions describe how …

Possible answers for question 2: … currents contribute to vector potential and charges contribute to scalar potential.
… current distribution on the antenna influences the directivity pattern.
… current distribution contributes to input impedance of the antenna.
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Question 3

Dyadic Green function …

Possible answers for question 3: … and Green function are two names for the same thing.
… is 3 x 3 matrix of functions relating contributions of current density components to vector potential components.
… is 3 x 3 matrix of functions for anisotropic non-linear substrates only.
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Question 4

Continuity theorem …

Possible answers for question 4: … relates charges and currents on the dipole.
… expresses the fact that electromagnetic wave is continuously radiated by the antenna.
… explains the continuity of current distribution.
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Question 5

If the frequency of the microstrip dipole antenna decreases, the phase interval of the current distribution of the microstrip dipole antenna …

Possible answers for question 5: … decreases too.
… increases.
… is not much affected.
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