HY19-12LF RF/IF and RFID

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RF directional couplers are passive components that sample a portion of an RF signal and deliver the acquired signal via a secondary port. The secondary port signal can either be a replica of the primary signal or an attenuated version. This sampling frequency is much lower than the sampling frequency of digital-based motors or opto-sensors. This sampling action helps the user acquire an information about the current or voltage that is being monitored in an electrically and magnetically insulated environment.

HY19-12LF is a directional coupler specifically designed for broadband applications. With a nominal frequency range of DC to 18GHz, HY19-12LF can accurately monitor small signal levels in most applications while keeping the RF effects no greater than -60dB for a 10dB coupling factor. It features an integrated low pass filter ranging from -22dB at 0.1MHz to -12dB at 18GHz.

The working principle of HY19-12LF is based on Faraday\'s Law of Magnetic Induction. A signal transmitted in the primary port induces a proportional signal in the secondary port. This signal can be used to monitor or measure larger signals and small signal levels. The signal from the secondary port is always weaker than the signal from the primary port due to the effects of the transformer coupled element.

HY19-12LF is specifically designed for applications that involve assessing small or weak signal levels. This includes monitoring RF power levels in cables and systems, measuring small signal levels in integrated circuits and boards, and measuring and verifying the output of wireless transceiver systems. The integrated low pass filter further enhances the accuracy of measurements made in high frequency circuits. HY19-12LF can also be used as a signal level indicator in applications involving electromagnetic compatibility (EMC) and radiofrequency interference (RFI) measurements.

Apart from its monitoring capabilities, HY19-12LF can also act as a protection device. It is capable of protection circuits and systems against excessive levels of RF and EMI. The device can immediately detect a rise in the signal level and switch it off, preventing permanent damage to the circuit or system. This feature allows the device to be used in areas that require stringent safety regulations, such as medical & healthcare, military, and aerospace and defense.

In conclusion, HY19-12LF is a highly versatile and reliable directional coupler that offers precise monitoring and protection capabilities for small-signal levels in a wide range of applications. With its integrated low pass filter, the device can be used in EMC and RFI testing and monitoring, as well as in industrial and medical device applications. Consequently, HY19-12LF is an ideal component to consider when looking to add inter-circuit or inter-system protection from excessive levels of EMI and RF signals.

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