Microstrip antenna: Questions & Answers file:///mnt/disk_d/mikulka/documents/web/raida/4_5F.
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4.5 Microstrip antenna
Questions and answers
Answer these questions to get feedback on how well you understand the course. Only one of the answers
is correct. You don't have to answer every question. If you don't know the answer you can just leave it
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correctly will add 2 points to your score but on the other hand you'll lose 1 point if your answer is
wrong. The questions are divided in two groups of five questions.
Press See Result after you have finished answering.
First pentad
Question 1
The aperture-fed patch antenna consists of...:
Possible answers for question 1:
... the patch and the coaxial probe in the role of feeding.
... the patch and the aperture of the horn antenna in the role of the primarily radiator.
... the microstrip on the bottom, the slot in the middle, and the patch on the top.
I won't answer this question
Question 2
The patch antenna excels in...
Possible answers for question 2:
... low profile and low fabrication costs.
... low fabrication costs, and very high efficiency.
... high gain.
I won't answer this question
Question 3
The simplified analysis of the patch antenna ...
1z3 07.11.2007 13:37
Microstrip antenna: Questions & Answers file:///mnt/disk_d/mikulka/documents/web/raida/4_5F.html
Possible answers for question 3:
... considers the patch only ? the antenna behaves like a wide dipole.
... assumes the antenna behaves like a dielectric resonator (non-radiating structure).
... cannot be performed ? full-wave methods have to be applied.
I won't answer this question
Question 4
Surface waves degrade antenna parameters ...
Possible answers for question 4:
... in case the dielectric constant of the substrate is high, and the frequency is high also.
... in case the height of the substrate is negligible compared to the wavelength.
... any time ? they cannot be satisfactorily suppressed.
I won't answer this question
Question 5
Increasing the dielectric constant of the substrate ...
Possible answers for question 5:
... the antenna is smaller, and its parameters are not influenced.
... the antenna is smaller, and the bandwidth is narrower.
... the bandwidth is narrower, the dimensions are not influenced.
I won't answer this question
Second pentad
Question 1
Microstrip feeding of the microstrip antenna ...
Possible answers for question 1:
... is hard to be fabricated.
... does not influence the radiation pattern of the antenna.
... simplifies the construction of antenna arrays.
I won't answer this question
Question 2
Dealing with the dimensions of the rectangular patch ...
2z3 07.11.2007 13:37
Microstrip antenna: Questions & Answers file:///mnt/disk_d/mikulka/documents/web/raida/4_5F.html
Possible answers for question 2:
... the width should equal to half wavelength on the substrate, and the length is unimportant.
... both the width and the length should equal to half wavelength on the substrate.
... the length should equal to half wavelength on the substrate, and the width is unimportant.
I won't answer this question
Question 3
Green functions for layered media ...
Possible answers for question 3:
... can be exactly expressed in the closed form.
... have to be approximated (limited validity) for the practical use.
... are not used when analyzing patch antennas.
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Question 4
Moment method analysis of the patch antenna ...
Possible answers for question 4:
... can be performed in two dimensions when feeding is mapped to the plane of the patch.
... has to be carried out as the three-dimensional problem.
... is naturally a two-dimensional problem.
I won't answer this question
Question 5
In the moment method analysis of the patch antenna ...
Possible answers for question 5:
... a single mesh is used both for x-components and for y-components.
... no meshing is needed.
... two meshes have to be used (the first one for x-components, the second one for y-components).
I won't answer this question
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