1) . Using light sources as an analogy to antenna radiation patterns. Relate the

Question

1). Using light sources as an analogy to antenna radiation patterns. Relate the light pattern to the antenna that would produce a similar radiation pattern. (Highly Directional Antenna, Omnidirectional Antenna, Semidirectional Antenna) a). A table lamp with no shade. b). A table lamp with a shield preventing light from going in all directions c). a spotlight 2). Which of the following Wi-Fi technologies employ radios that use Multiple-Input, Multiple Output (MIMO)? Select all that apply. a). 802.11ac b). 802.11n c). 802.11g d). 802.11b e). 802.11a 3). Which of the following are the most effective element length for an antenna used with a 5 GHz transmitter (choose 2). Hint 1: Calculate the wavelength of this frequency first. Hint 2: Read the section discussing most effective length of an antenna element in the assigned reading. a). 30 mm b). 40 mm c). 70 mm d). 100 mm e). 120 mm 4). Although not always practical, antennas are most effective when the length of the antenna element is an even fraction (such as 1/4) or a multiple (such as 2X) of the wavelength. a). True b). False 5). An Azimuth chart shows the antenna radiation pattern on the horizontal plane (looking down on the radiation pattern). An Elevation chart shows a side view of the radiation pattern. a). True b). False 6). An access point has two or more antennas, with each having a receiver, and the receivers functioning together to minimize the negative effects of multipath. This can best be described as _____. a). Antenna diversity b). Antenna Polarization c). Fresnel Zoning d). Omnidirectionalization

Explanation / Answer

1.

==>Highly directional antenna --->(c) a spotlight

Explanation : As Highly directional antenna are those antenna which radiate signal in a narrow beam over a long distance which behaves as same as spotlight

==>omnidirectional --->(a) A table lamp with no shades.

Explanation : omnidirectional antenna are those antenna which radiate signal all direction which is same as lamp with no shade.

==>Semi directional --->(b)

Explanation : semi directional antenna are those antenna that are designed to provide specific ,directed signal coverage over large area s.

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