【技术】定向耦合器及其常见指标参数介绍
在微波系统中，往往需将一路微波功率按比例分成几路，这就涉及到功率分配问题。实现这一功能的元件称为功率分配元器件即耦合器，主要包括：定向耦合器、功率分配器以及各种微波分支器件。
本文优译将主要介绍定向耦合器及其常见指标参数。
耦合器是从无线信号主干通道中提取出一小部分信号的射频器件。与功分器一样都属于功率分配器件，不同的是耦合器是不等功率的分配器件。耦合器与功分器搭配使用，主要为了达到一个目标—使信号源的发射功率能够尽量平均分配到室内分布系统的各个天线口，使每个天线口的发射功率基本相同。
理想耦合器的输入端口功率等于耦合端口功率与输出端口功率之和，以瓦特（W）为单位，即
耦合器的重要指标是耦合度和插损。
耦合度是耦合端口与输入端口的功率之比，以dB表示的话，一般是负值。耦合度的绝对值越大，相当于损耗越小。
插损是输出端口与输入端口的功率之比。耦合度的绝对值越大，插损的绝对值越小。
以dB表示的话，有下列关系：
耦合器的插损（dB）和耦合度（dB）的关系可以表示为：
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优译定向耦合器选型表
优译提供定向耦合器选型：频率范围(GHz)：0.136-18GHz，耦合度(dB)：5-40dB，插损(dB)：0.2-1dB，方向性（dB)：10-20dB，驻波比：1.25-1.5，功率（W）：50-200W。
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产品型号
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品类
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频率范围(GHz)
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耦合度(dB)
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藕合平坦度（dB)
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插损(dB)
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方向性（dB)
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驻波比
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功率（W）
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连接形式
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温度(°C)
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尺寸-长x宽x高(mm)
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UIYDCP14337B136T174C20NF
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定向耦合器
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0.136~0.174
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5~40
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±1.0
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0.2
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20
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1.25
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200
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N
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-20~+70
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143×37×20
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选型表 - 优译 立即选型
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