First take the theoretical analysis in E-T waveguide junction branch waveguide H surface slot coupler and three-port power divider / combiner network and use the electromagnetic simulation software CST and HFSS for a few kinds of networks of field analysis .

首先对波导T型结、分支波导耦合器、H面缝隙耦合器以及 三 端口功率分配/合成 网络进行了理论分析，并运用电磁场仿真软件CST和HFSS对上述几种网络进行了场分析。

In network security and firewall concepts development and problems to be solved on the basis of the study design and implement a three-port NAT firewall system authentication network address translation filtering and other major functional blocks .

在对网络安全与防火墙概念、发展及亟待解决的问题的探讨的基础上，设计并实现了 三 端口NAT式防火墙系统的身份认证， 网络地址转换，过滤等主要功能模块。

This paper presents a new method of measuring complex reflection coefficient using an Arbitrary three-port network and a variable attenuator .

本文提出利用任意 三 端口 网络和可变衰减器测量复反射系数的新方法。

In this paper based on the characteristic of the impedance converter some methods for its three-port network parameters are analyzed .

文章从阻抗变换器的特性出发，对 可能获取阻抗变换器 三 端口 网络参数的方法进行了分析、比较。