The RF duplex is used for mobile communication and as an unmanned relay station in the field, and it determines its usage environment and working conditions.

　　Firstly, we hope that the RF duplex has a compact size and light weight. Currently, due to the size of RF duplexers and other technical issues, there have been no reports on RF duplexers used for handheld wireless telephones. However, for car mounted wireless telephones, cars, etc., the space they can provide is limited, and there are also wiring and heat dissipation issues that need to be considered. Therefore, while meeting other technical specifications, it is necessary to miniaturize the RF duplex.

　　Secondly, RF duplexers must be easy to install, especially when installed separately from certain wireless telephones. And it should have a sturdy, reliable, compact structure, and be able to withstand certain impacts and vibrations, especially for wireless telephones used in areas with poor geographical environments. We know that most current RF duplexers rely on distributed parameters to determine their operating frequency and other performance requirements. If the structure of an RF duplexer is not adjustable, it may lead to a deterioration of the overall performance of the wireless telephone, and even burn out the receiver, which is particularly important. Furthermore, as a turntable, it can sometimes be used in harsh environments, which requires the RF duplex to ensure communication quality within the corresponding operating temperature range. Generally speaking, RF duplexers should have a clear operating temperature range and stability indicators for temperature changes to meet the requirements of the entire machine.

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