TELECOMMUNICATIONS SYSTEMS
COMMUNICATION WIRELESS COMPUTING DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Directional antennas
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Omni-directional Antennas
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Either A or B
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None of the above
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Detailed explanation-1: -Directional antennas send and receive signals in one direction only, usually in a tightly focused, very narrow beam. The signal pattern from a directional antenna has a cigar shape, and looks the same from the top as from the sides. This shape is referred to as a lobe.
Detailed explanation-2: -An isotropic antenna (also known as an omnidirectional antenna) emits the signal uniformly in all directions.
Detailed explanation-3: -Directional antennas can radiate radio waves in beams, when greater concentration of radiation in a certain direction is desired, or in receiving antennas receive radio waves from one specific direction only.
Detailed explanation-4: -The two main highly directional antennas are Parabolic (Dish) and Grid. Dish antennas look similar to the TV dish antennas that you would find in a home but are often much larger in size. Grid antennas can also vary in size, but they look like a grill and are designed for outdoor environments with higher winds.