一文详解TX/RX多路耦合收发系统
TX/RX多路耦合收发系统是结合了合路器和分路器功能的系统。它用于接收器和发射器的信号传输至天线，且提供端口间高隔离度的信号。典型的多路耦合器由滤波器/双工器、低噪声放大器和功率分配器组成。它是电信系统的重要组成部分。
当多台接收机或发射机或电台共用一副天线时，为了避免设备间相互干扰，在天线和各设备间使用的耦合装置。
由于多路耦合器可以使多个收发设备同时共用一副天线，能大大减少系统的天线数量，降低通讯设备的成本，提供通讯系统的电磁兼容性能，在无线通讯中得到了广泛应用。无线通讯的应用场景覆盖卫星通信、电信、广播电视、无线电监测、天气雷达、民航雷达、防御、部件的自动化测试等等方面。
TX/RX多路耦合收发系统：TX合路器和RX功分器的组合
TX合路器：也叫TX同频合路器，它是一种无源结构，用于将发射机组合到一根天线上。它根据要求提供定制频段，并提供端口到端口的高隔离度。该设备通常有2-CH、4-CH、60CH或8-CH可选，具有1U高紧凑外壳，方便安装。
RX分配器：它是一种用于将接收器连接到单个天线的结构。提供无源或有源设计可供选择。通常有源型内置LNA，用于放大信号。它有助于补偿过滤和分离后的任何信号损失。
多路耦合器的性能要求
为使多部收发设备共用一副天线，要保证每个收发设备都能各自正常的工作，达到预期效果，对多路耦合器有严格的性能要求：
1.每个通道必须有良好的频率选择性，以避免其他通道信号或无用信号的串入耳产生不必要的信号干扰；
2.任意两个通道之间应具有足够高的隔离度；
3.每个通道从输入到输出应具有较小的插入损耗；
4.在工作频带内，输入输出应具有良好的匹配；
5.设备应具有足够的功率容量。
下图为一款VHF频段4TX 4RX收发系统指标参考：
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本文由上山打老虎转载自优译官网，原文标题为:什么是多路耦合收发系统?，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。
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