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| Q. |
What is the beam width for a half wave dipole antenna? |
| A. | 90° |
| B. | 180° |
| C. | 50° |
| D. | 250° |
| Answer» A. 90° | |
| Explanation: the beam width is measured between the points on the radiation curve that are 3 db down from the maximum amplitude of the curve. the maximum amplitude of the pattern occurs at 0° and 180°. the 3-db down points are 70.7 percent of the maximum. the angle formed with two lines extending from the center of the curve to these 3-db points is the beam width. the beam width is 90°. the smaller the beam width angle, the more directional the antenna. | |
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