Question 20 of 240 from exam 400-351: CCIE Wireless Written Exam

Q: When viewed from the side (in the H-plane), how can the radiation pattern of a patch and Yagi antennas be described? (Choose two.)

the patch patterns are egg-shaped.the Yagi patterns are conical.

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Question

When viewed from the side (in the H-plane), how can the radiation pattern of a patch and Yagi antennas be described? (Choose two.)

Answers

A. the patch patterns are egg-shaped.

B. the patch patterns are conical.

C. the patch patterns are doughnut-shaped.

D. the Yagi patterns are conical.

E. the Yagi patterns are egg-shaped.

F. the Yagi patterns are doughnut-shaped.

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Explanations

A. B. C. D. E. F.

AD.

When viewed from the side, the radiation pattern of a patch antenna and Yagi antenna can be described as follows:

Patch Antenna: The radiation pattern of a patch antenna is typically described as being doughnut-shaped or sometimes referred to as a toroidal shape. This is because the electromagnetic energy radiates perpendicular to the surface of the antenna, forming a torus shape around the antenna. This pattern is usually relatively flat, with the majority of the energy radiating outwards from the side of the patch.
Yagi Antenna: The radiation pattern of a Yagi antenna can be described as being conical. This is because the antenna elements are arranged in a specific pattern to create a focused beam of electromagnetic energy in a specific direction. The Yagi antenna typically has a narrow beam width in the H-plane, which is perpendicular to the direction of the elements, and a wider beam width in the E-plane, which is parallel to the direction of the elements.

To summarize, the radiation pattern of a patch antenna is typically doughnut-shaped, while the Yagi antenna has a conical pattern. It is important to note that the exact shape and characteristics of the radiation pattern will vary depending on the specific design and configuration of the antenna.

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