Taajuusvälistä

Taajuusvälistä is a Finnish term that translates to "intermodulation" in English, particularly in the context of signal processing and radio frequencies. It refers to the phenomenon where two or more signals at different frequencies mix within a non-linear device, creating new signals at frequencies that are the sum and difference of the original frequencies. This unwanted generation of new frequencies can lead to interference, distorting the intended signals and potentially disrupting communication systems.

The non-linearity causing taajuusvälistä can occur in various electronic components such as amplifiers, mixers, and even antennas under certain conditions. The strength of the intermodulation products depends on the power levels of the original signals and the degree of non-linearity in the system. In radio receivers, strong out-of-band signals can cause taajuusvälistä within the receiver's own circuitry, creating spurious signals that can mask or interfere with weaker, desired signals.

Techniques to mitigate taajuusvälistä include using linear components, filtering out strong unwanted signals before they reach non-linear stages, and designing systems with careful consideration of signal levels and component characteristics. Understanding and controlling taajuusvälistä is crucial for ensuring the reliable performance of telecommunications, broadcasting, and other electronic systems that handle multiple radio frequency signals.