Non-Ionizing Radiation Measurements for Trajectography Radars.

Area of Science:

• Electromagnetics and Radio Frequency Engineering
• Radiation Safety and Health Physics
• Radar Systems and Technology

Background:

• Trajectography radars utilize high-gain, narrow-beam antennas emitting high-power signals.
• Assessing Non-Ionizing Radiation (NIR) exposure from such systems is crucial for safety.
• Standard measurement methods may not fully capture localized power density from directional antennas.

Purpose of the Study:

• To conduct a Non-Ionizing Radiation (NIR) measurement campaign for a C-band trajectography radar.
• To propose and validate a specific measurement method using a directional antenna.
• To assess compliance with international and national exposure limit levels.

Main Methods:

• A novel measurement approach using bench equipment and a directional receiving antenna was employed.
• Power density measurements were taken around a C-band trajectography radar.
• Measured levels were compared against ICNIRP and Anatel occupational and general public exposure limits.

Main Results:

• The studied radar respected occupational public exposure limits in all measured locations.
• Power density levels exceeded the general public exposure limit at a specific point near the radar antenna.
• The findings highlight the effectiveness of the directional antenna measurement method.

Conclusions:

• The C-band trajectography radar demonstrates safe operation concerning occupational exposure.
• Preventive measures are necessary to mitigate risks associated with exceeding general public exposure limits near the antenna.
• The proposed measurement methodology provides valuable insights for radar system safety assessments.