![]() Wi-Fi communicates among others in the frequency range of 2.4 GHz or 5 GHz, an FM radio in the frequency range of 87.6 MHz – 108 MHz. But why is this the case? Why do communication systems not use the same antenna? The reason is that different frequencies are assigned to different services and systems. For example, a Wi-Fi antenna is shorter than the antenna of a stationary radio. These vary in length depending on the system. In wireless communication systems, antennas are used for both the transmitter and the receiver. 1.1 Why are antennas of different lengths? Why are different radio systems equipped with differently constructed and long antennas? And what difference does it actually make if one or more antennas can be connected to a Wi-Fi router? Why is this extension necessary or is it perhaps just a question of better design? In the following chapter, the topic “antenna technology” is explained in more detail.
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