Answer :
Final Answer:
5G cellular technology promises download speeds as high as 20 Gbps, requiring more antenna arrays, with each antenna sending out multiple microwave signals. The correct option is 3) 15.
Explanation:
5G technology relies on higher frequency bands, including millimeter waves, to achieve increased data rates. To support these frequencies and deliver the promised download speeds, more antenna arrays are required. Multiple-input, multiple-output (MIMO) technology is commonly used, where each antenna can transmit and receive multiple signals simultaneously. The number of signals sent out by each antenna is determined by the concept of spatial multiplexing. In this case, with the mention of higher download speeds and the need for more antenna arrays, it is reasonable to assume a spatial multiplexing factor of 15, making option 3) 15 the correct choice.
Option 3) 15 is the answer.
