What is the primary disadvantage of higher frequency radio signals?

Higher frequency radio signals tend to have shorter wavelengths, which affects their ability to penetrate solid objects such as buildings, trees, and other physical barriers. This diminished penetration capability means that as the frequency of the signal increases, it becomes less effective in transmitting through obstacles. In practical terms, this can result in weaker signals in urban environments or densely constructed areas, where buildings can obstruct the signal path.

In contrast, lower frequency signals, which have longer wavelengths, are generally better suited for penetrating through obstacles, making them more effective for certain applications in complex environments. The choice of frequency in communication systems must, therefore, consider this trade-off between penetration and frequency, aiding in the selection of the most appropriate technology for specific scenarios.