350-401 Question #1196: Real Exam Question with Answer & Explanation

Question

Refer to the exhibit. Which type of antenna is shown on the radiation patterns?

Options

• Apatch
• Bdipole
• Comnidirectional
• DYagi

Explanation

The exhibit shows a radiation pattern with a highly directional main lobe, which is characteristic of a Yagi antenna.

Common mistakes.

• A. A patch antenna typically has a broader, somewhat directional pattern, but not as sharply focused as the one shown.
• B. A dipole antenna usually has a roughly omnidirectional pattern in the horizontal plane (like a donut shape) and nulls off the ends.
• C. An omnidirectional antenna emits RF energy equally in all directions in a horizontal plane, producing a circular or donut-shaped radiation pattern, which is contrary to the highly focused pattern shown.

Concept tested. Antenna radiation patterns

Reference. https://www.cisco.com/c/en/us/td/docs/wireless/access_point/802_11ac/design/guide/802_11ac_DG/chapter_08000.html#pgfId-108709

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