RF Duplexer
The core feature of an RF duplexer is its integration of two bandpass filters operating at different frequencies. This allows a single transceiver to simultaneously transmit and receive signals through the same antenna, while preventing strong transmitted signals from blocking or damaging the sensitive receiver thanks to frequency separation and high isolation.
The core feature of an RF duplexer is its integration of two bandpass filters operating at different frequencies, enabling a single transceiver to simultaneously transmit and receive signals through the same antenna. Thanks to frequency separation and high isolation, the duplexer can prevent strong transmitted signals from blocking or damaging the sensitive receiver.
Its core features include:
- Frequency separation function: Internally, it includes two filters—one for passing the transmit frequency band and the other for passing the receive frequency band—forming the basis for achieving duplex operation.
- High transmit-receive isolation: This is one of its most critical performance features, ensuring that the strong transmit signal is directed solely toward the antenna and is effectively blocked from entering the receive path, thereby protecting the receiver and eliminating self-interference.
- Single-antenna interface: Featuring three ports—transmit, receive, and shared antenna—this interface enables simultaneous transmission and reception using a single antenna, simplifying system design.
- Low insertion loss: In both the transmit and receive channels, the loss to the respective useful signals must be kept as low as possible to ensure system efficiency.
- Core application: It is a key component in frequency-division duplex communication systems (such as 4G/5G base stations, mobile phones, and satellite communications), enabling simultaneous two-way communication over a single channel.
The core feature of an RF duplexer is its integration of two bandpass filters operating at different frequencies. This allows a single transceiver to simultaneously transmit and receive signals through the same antenna, while preventing strong transmitted signals from blocking or damaging the sensitive receiver thanks to frequency separation and high isolation.
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