Which of the following bands represents the highest frequencies?

The Ka band represents the highest frequencies among the options provided. This band generally covers frequencies in the range of 26.5 to 40 GHz, making it suitable for various high-frequency applications such as satellite communications and advanced radar systems. The Ka band offers larger bandwidths compared to the other bands listed, resulting in higher data rates and better resolution in radar applications.

In comparison, the K band typically spans from 18 to 27 GHz, the X band covers frequencies from 8 to 12 GHz, and the S band ranges from 2 to 4 GHz. Consequently, while each of these bands has its uses in communication and radar, it is the Ka band that operates at the highest frequencies, enabling enhanced performance in applications requiring high data throughput and precision.