Model 647

The Model 647 DF Antenna is a high-performance system designed for direction finding (DF) and signal monitoring applications. It incorporates two DF arrays alongside a biconical omnidirectional antenna, which functions as both a monitoring and reference component. This versatile configuration enables precise DF capabilities and reliable signal tracking across a wide frequency range.

The DF arrays are composed of nine vertically polarized fan elements securely housed within a low-loss radome. This radome not only provides protection but also integrates essential system components for enhanced performance. Inside, a broadband RF switch ensures efficient signal routing by commutating signals from the DF elements to an external multi-channel DF or monitoring receiver. This functionality enables seamless integration with advanced signal processing systems, ensuring accurate data analysis in diverse operational environments.

Additionally, the RF switch generates test signals for calibration, which is critical for maintaining the accuracy and reliability of direction-finding operations. These calibration signals support automatic system self-testing, allowing the Model 647 to detect and address performance issues proactively. This automated functionality reduces the need for manual intervention, enhancing system efficiency and ensuring consistent performance.

Built with robust materials, the Model 647 DF Antenna is designed for long-term operation in challenging environments. Its combination of dual DF arrays and a biconical omnidirectional antenna provides users with a powerful tool for spectrum monitoring, signal interception, and intelligence gathering. This design makes the Model 647 an excellent choice for professionals in defense, security, and communications fields who require precise and reliable direction-finding capabilities.

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