What is a RF Diplexer?
A diplexer is a 3-port passive device that implements frequency-domain multiplexing. It splits the incoming signal from an antenna into two paths or channels based on their frequencies. It allows two different signals, typically with different frequencies, to share a common transmission path without interfering with each other. It is useful in scenarios where multiple signals need to be transmitted and received using a single antenna.
The diplexer receives a signal input with multiple frequencies at the common port. Then, using a Low Pass Filter and a High Pass Filter, it separates out the signals based on their frequencies, respectively. The LPF connects the common port to a low-frequency port (L), and the high-pass filter connects the common port to a high-frequency port (H). After the filtering process, the signals are diverted to the respective ports and transmitted to the devices connected to the ports.
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