Systematic Design of Large-Scale Multiport Decoupling Networks
Systematic Design of Large-Scale Multiport Decoupling Networks
复制标题
大规模多端口去耦网络的系统设计
DOI：
--
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
E. Stauffer
中科院分区：
文献类型：
--
作者：
D. Nie;B. Hochwald;E. Stauffer
在驱动耦合耗散负载的射频系统中，放大器及其负载之间的匹配网络需要考虑耦合。当N个放大器驱动N个负载时，最好的选择是“去耦”网络，这是一种无损互易网络，具有连接到源极的N个输入端口和连接到负载的N个输出端口。去耦网络将负载的耦合阻抗转换为电源的非耦合特性阻抗。网络输入端口处的任何入射信号都无反射地传输到负载。根据设计频率的不同，去耦网络可以由集总阻抗和分布阻抗的广义网络来实现。虽然网络的阻抗要求是唯一的，但它的实现却不是，涉及许多阻抗的网络可能很难在电路板上布局。在本文中，我们建立了一个去耦网络需要最小的N2+N阻抗的N个任意耦合的负载，并提供了一个系统的方法来实现这个下限。我们还提供了选择性地消除阻抗的方法。我们给出了一个例子，其中只有4N的阻抗是需要的负载具有耦合对称性。介绍了这些方法的应用。
In radio-frequency systems that drive coupled dissipative loads, the matching network between the amplifiers and their loads needs to account for the coupling. With N amplifiers driving N loads, a favorite choice is a “decoupling” network, which is a lossless reciprocal network that has N input ports connected to the sources and N output ports connected to the loads. The decoupling network transforms the coupled impedance of the loads into the uncoupled characteristic impedance of the sources. Any incident signal at the input ports of the network is transferred, without reflection, to the loads. Decoupling networks can be realized by generalized Π-networks of lumped and distributed impedances, depending on the design frequency. Although the impedance requirements of the network are unique, its realization is not, and networks that involve many impedances can be difficult to lay out on circuit boards. In this paper, we establish that a decoupling network requires a minimum of N2+N impedances for N arbitrarily coupled loads, and provide a systematic method for realizing this lower bound. We also provide methods for selectively eliminating impedances. We give an example where only 4N impedances are needed for loads that have coupling symmetry. Applications of the methods are presented.