BI924S  环形耦合器  多用于功率分配或组合

型号：BI924S  3KDE175831L9240

环形耦合器是射频前端模块中的重要元件之一，多用于功率分配或组合。它主要由周长为3/2个导波波长的闭合圆环和四个输入输出传输线相连接而构成。与圆环相连接的四个传输线的特征阻抗为Zo，而圆环的特征阻抗为根号二倍Zo。当微波信号从某个端口输入，其他端口皆接匹配负载时，输入信号功率可以等分成两部分，从特定端口输出，而其他端口则无信号输出或彼此隔离。

BI924S  3KDE175831L9240环形耦合器的设计原理涉及到多个参数，如工作频率、板材选择、弯角参数设置、阻抗和电长度等。在设计中，需要根据具体需求来确定这些参数，并进行原理图仿真和版图仿真，以验证设计的正确性。例如，在原理图仿真中，需要考虑弯角的参数设置，以及利用阻抗和电长度来求出弧长和半径等关键参数。

环形耦合器的特点在于它有两个工作模式，并且一般实现的是等功率分配。这使得它在馈电系统中可以用来代替两个单独的馈电网络，有利于减小系统的小型化设计。此外，环形耦合器还能实现共模馈电和差模馈电间的转换，进一步增加了其在射频前端模块中的应用价值。

总的来说，BI924S  3KDE175831L9240环形耦合器是一个复杂但功能强大的射频元件，其设计和应用需要深入理解和掌握相关的理论知识和技术方法。在实际应用中，需要根据具体需求和条件来选择合适的参数和设计方案，以实现最佳的性能表现。

Model: BI924S 3KDE175831L9240

The ring coupler is one of the important components in the RF front-end module, which is mostly used for power distribution or combination. It is mainly composed of a closed ring with a circumference of 3/2 guided wave lengths and four input and output transmission lines connected. The characteristic impedance of the four transmission lines connected to the ring is Zo, while the characteristic impedance of the ring is twice the square root Zo. When the microwave signal is input from a port and the other ports are connected to the matching load, the input signal power can be equally divided into two parts, output from a specific port, and the other ports have no signal output or are isolated from each other.

The design principle of the BI924S 3KDE175831L9240 ring coupler involves a number of parameters, such as operating frequency, plate selection, bending parameter setting, impedance and electrical length. In the design, these parameters need to be determined according to specific needs, and schematic simulation and layout simulation are carried out to verify the correctness of the design. For example, in schematic simulation, it is necessary to consider the parameter setting of the corner, as well as the use of impedance and electrical length to find key parameters such as arc length and radius.

The characteristic of the ring coupler is that it has two operating modes, and generally achieves equal power distribution. This makes it can be used to replace two separate feed networks in the feed system, which is conducive to reducing the miniaturization design of the system. In addition, the ring coupler can also realize the conversion between common mode feeders and differential mode feeders, which further increases its application value in RF front-end modules.

Overall, the BI924S 3KDE175831L9240 ring coupler is a complex but powerful RF component, and its design and application require in-depth understanding and mastery of relevant theoretical knowledge and technical methods. In practical applications, appropriate parameters and design schemes need to be selected according to specific requirements and conditions to achieve the best performance.