A personal dosimeter used to measure microwave radiation would typically be a specific type of instrument called a microwave radiation dosimeter. However, it's important to note that the frequency you mentioned, 4,000 MHz (4 GHz), falls within the range of typical microwave frequencies used for various applications, including Wi-Fi, Bluetooth, and some types of radar. The specific dosimeter required to measure microwave radiation at this frequency would depend on the intended purpose and the specific features and capabilities needed.
One common type of dosimeter used for measuring microwave radiation is a microwave survey meter or microwave field strength meter. These meters are designed to measure the strength or power density of microwave radiation in a given area. They typically have a frequency range specified, so it's important to ensure that the chosen dosimeter covers the 4,000 MHz frequency range.
Microwave dosimeters may come in various forms, including handheld devices or personal monitors that can be worn on the body. Some dosimeters may provide real-time monitoring and display of radiation levels, while others may record data for later analysis. It's important to consider the specific requirements of your situation when selecting a dosimeter.
When selecting a personal dosimeter for microwave radiation, it's advisable to consult with radiation safety experts, manufacturers, or suppliers who specialize in radiation detection and protection equipment. They can provide guidance on the appropriate dosimeter for your needs, ensuring it is suitable for detecting microwave radiation at the specific frequency you mentioned (4,000 MHz) and meets relevant safety standards.