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What is duplexer?-The working principle and application field of duplexer

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2024-09-27 14:47

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A duplexer is an important device used in a wireless communication system, and is mainly used to implement a function of receiving and transmitting signals on a same frequency band. Its name comes from the concept of duplex communication, which means that two-way communication can be achieved without interference. In wireless communications, the duplexer acts like a frequency switcher, allowing the transmitter and receiver to share the same frequency band at the same time.
The working principle of the duplexer is based on the design of the filter. By filtering out or suppressing the interference between the transmitted and received signals, the two can operate on the same frequency band without interfering with each other. The most common types of duplexer include the common line type, the coaxial type, and the surface acoustic wave type, each of which has its own advantages and disadvantages and applicable scenarios.
In wireless communication systems, duplexer are widely used in mobile communication base stations, satellite communications, radar systems and other fields. For example, in a mobile communication system, a duplexer is used to implement two-way communication between a mobile phone and a base station; in a satellite communication system, a duplexer is used to separate uplink and downlink signals of a satellite.
In general, duplexer, as an important component in a wireless communication system, plays a key role in ensuring the normal operation and efficient communication of the communication system. The research and development of its working principle and application field will further promote the progress and innovation of communication technology.

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