描述
| 品牌 | 品名 | 产品型号 | 订货号 |
| BARTEC | 模块 | 07-7311-97WP5400 | |
| 产地 | 可售卖地 | 是否进口 | 保修期 |
| 美国 | 全国、国外 | 是 | 一年 |
| 发货地点 | 发货方式 | 使用方式 | 适用行业 |
| 厦门 | 顺丰快递 | 调试安装 | 电厂钢厂水泥厂船舶造纸 |
| 服务优势 | 国外进口 、 备货供应、 | 价格合适、品质可靠 | 订货 |
| 产品特点 | 一手货源、 按型号供货 | 售后有保障 | 何经理180,5988-4797 |
一、概述
耦合器将信号耦合出一部分能量，耦合出的能量常用于信号的检测或监测，比如功率测量和检波等。
通常用的耦合器是定向耦合器，定向耦合器的耦合端耦合输出是存在方向性的，如下图：
1输入时，C1端会输出信号，而C2端是隔离的；2输入时，C2端输出信号，C1端是隔离的。
常用的定向耦合器只有3个端口，一般第4个端口接负载，负载可以是内置的，也可以是外置的，这样C1只能对1端输入的信号进行耦合，而对2端输入的信号不耦合能量：
双定向耦合器是两个设计在一起定向耦合器，往往采用相反的耦合方向，适合于驻波检测。
二、种类
耦合器种类比较多，包括微带线、集总参数、传输线变压器等，公众号里之前介绍的分支线耦合器（Branchline Couplers）也是耦合器的一种，下面是常见的耦合器电路结构：
耦合器实物如下：
三、特性
像大多数无源微波器件一样，耦合器也有工作频率、插损、驻波、波动这几个指标，对耦合器来说，耦合度和定向度是重要的两个指标：
耦合度是从1端口输入的能量，从耦合端耦合出来，从2端口输入的能量从C2端耦合出来，从1到C1或从2到C2的衰减。
方向度定义了定向耦合器的定向程度, 当方向性变差时，定向耦合器就会逐步退化为普通的耦合器。从1端口输入的能量，从耦合端耦合出来，从2端口输入的能量从C2端耦合出来，C1不会有能量输出，这是理想状况。从2端输入时，总有能量泄漏只C1。从1端口到C1的衰减叫耦合度，从2端口到C1的衰减叫隔离度。
方向性＝隔离度 – 耦合度
不同耦合器特性对比：
四、提高工作带宽的方法
由上表可以看出，单级耦合器（single section couplers）工作带宽一般可以做到一个倍频层，如果采用多级耦合器（multi section couplers），可以显著提高工作带宽。
07-7311-97WP5400
I. Overview
The coupler couples the signal to a part of the energy, and the coupled energy is often used for signal detection or monitoring, such as power measurement and detection.
The coupler usually used is a directional coupler, and the coupling output of the coupling end of the directional coupler is directional, as shown in the following figure:
1 input, C1 end will output a signal, and C2 end is isolated; 2 input, C2 terminal output signal, C1 terminal is isolated.
Commonly used directional couplers have only 3 ports, generally the fourth port is connected to the load, the load can be built-in, can also be external, so that C1 can only be coupled to the input signal of 1 end, and the input signal of 2 end does not coupling energy:
Double directional couplers are two directional couplers designed together, often using opposite coupling directions, suitable for standing wave detection.
Ii. Types
There are more types of Couplers, including microstrip lines, lumped parameters, transmission line transformers, etc., the Branchline Couplers introduced before the public number is also a kind of couplers, the following is the common couplers circuit structure:
The coupler is as follows:
Iii. Characteristics
Like most passive microwave devices, the coupler also has operating frequency, insertion loss, standing wave, wave, these indicators, for the coupler, coupling degree and orientation are two important indicators:
The coupling degree is the attenuation of the energy input from port 1, coupled from the coupling end, and the energy input from port 2, coupled from the C2 end, from 1 to C1 or from 2 to C2.
Orientation defines the orientation degree of the directional coupler, when the directivity becomes worse, the directional coupler will gradually degenerate into an ordinary coupler. The energy input from port 1 is coupled from the coupling end, and the energy input from port 2 is coupled from the C2 end, and C1 has no energy output, which is the ideal situation. When input from 2 ends, there is always energy leakage only C1. The attenuation from port 1 to C1 is called coupling, and the attenuation from port 2 to C1 is called isolation.
Directivity = isolation – coupling degree
Characteristics comparison of different couplers:
Fourth, the method of improving the working bandwidth
As can be seen from the above table, the working bandwidth of single section couplers can generally achieve a frequency doubling layer, and if multi-section couplers are used, the working bandwidth can be significantly improved.
