F9F3A-NM3

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F9F3A-NM3 is a type of microwave power detector developed by Narda, a subsidiary of L-2 Communications. It is designed to measure the RF power of a signal or transmission line, as well as the power of an antenna or other antenna components. The detector consists of a thin film deposit on a high-performance silicon substrate, which is maintained at a constant temperature.

The F9F3A-NM3 application field is in recognizing busy and active frequency bands without the need for a spectrum analyzer. The detector can measure the peak power, average power, and peak-to-average power ratio of a signal. It also has a wide dynamic range for accurate measurement of weak or noisy signals, with low levels of generating harmonic distortion. This makes it useful in the installation and maintenance of radio frequencies.

The working principle of the F9F3A-NM3 is based on the thermoelectric effect, which states that a temperature difference between two junctions of the same material will result in an electric current. The detector uses a patented high performance silicon substrate with a thin film deposit on top, which is maintained at a constant temperature. As the current of the signal to be measured passes through the substrate, the ambient temperature of the substrate will fluctuate, causing a change in the temperature difference between its junctions.

This temperature change is then translated into a corresponding electric current by means of a transducer, and the electric current is then amplified and displayed as a measurement of the signal power. The detector is further protected from external interference and noise by a high-impedance front-end, which ensures accurate readings, even in high-distortion environments. The detector can be used to measure signals in frequency band up to 40 GHz.

The F9F3A-NM3 microwave power detector is a powerful and reliable tool for measuring the power of RF signals in real time. It is a convenient and accurate way to ensure that radio frequency systems are operating at optimal performance levels, and to detect interference. With its wide dynamic range and high stability, the detector is suitable for both low-level and high-level measurements, making it an ideal solution for a variety of radio frequency system applications.

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