DESCRIPTION:
The Bird 4021 is a directional RF power sensor designed for accurate measurement of forward and reflected power in HF systems. Operating over a frequency range of 1.8 to 32 MHz, it is used for monitoring transmitter output, antenna matching, and system performance in high-frequency RF applications.
The sensor enables measurement of power flow direction, allowing engineers to assess load matching and identify reflected power caused by impedance mismatches. It is suitable for use with compatible Bird power meters and RF monitoring systems in laboratory, production, and field environments.
The 4021 directional power sensor is commonly used in broadcast, marine, military, and general HF communications applications where reliable power measurement is required.
Key Features
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Directional RF power sensor
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Frequency range 1.8 to 32 MHz
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Measures forward and reflected power
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Used for transmitter monitoring and antenna matching
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Compatible with Bird RF power meters
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Suitable for laboratory, production, and field use