laajakaistasäteilymittareita

Laajakaistasäteilymittareita are instruments designed to measure electromagnetic field intensity over a wide frequency range, typically from a few kilohertz up to several gigahertz. They are commonly used in industrial, commercial and research environments where multiple sources of radio frequency (RF) emissions coexist, such as cellular base stations, Wi‑Fi routers, microwave ovens and industrial RF processing equipment. The meter provides readings in units of millivolts per metre (mV/m) or decibels relative to a defined reference (dBµV/m), allowing users to assess compliance with regulatory exposure limits and to identify potential sources of interference.

The core measurement principle involves a broadband antenna coil or dipole that generates a voltage proportional to the electric field strength over its entire frequency range. A passive network translates this voltage into a terminal voltage that drives a detector and displays the field level on an analog scale or digital readout. High‑frequency signal integrity is maintained by virtue of a broadband balun and low‑noise amplification circuitry. Some models incorporate filtering functions to isolate specific frequency bands or to avoid overload from very high power transmitters.

In practice, a technician places the meter Probe in proximity to the suspected radiation source, often aligning it with the main axis of the antenna to capture the strongest field component. Many devices feature colour‑coded frequency ranges and safety alerts when readings exceed permissible exposure limits, in accordance with national or international standards such as IEC 60870‑5‑33 and local regulations. The versatility of laajakaistasäteilymittareita makes them essential tools for ensuring electromagnetic compatibility, safeguarding personnel and maintaining the performance of RF‑dependent systems.