Directional Couplers are four-port networks and fairly difficult to design.

定向耦合器是四端口网络，直接设计十分困难。

youdao

The characteristic impedance and image impedance of two-port networks are discussed in this paper.

主要讨论了二端口网络的特性阻抗与影像阻抗。

youdao

The noise correlation matrixes of two linked two-port networks were also gotten from basic definitions.

并推导了两个二端口网络的级联和并联后的噪声相关矩阵。

youdao

Google wallet already has this security feature, but there have already been reports of hackers being able to port the app on unsecured networks and devices (other than the supported Nexus S 4G on Sprint).

FORBES: Invasion of the Invisible Wallet

Their adoption of Network Magic is a big plus for privately held Pure Networks, which has already authored Port Magic, a product that enables gamers to play multi-player games over the Internet by automatically opening and closing ports on their Internet gateways.

ENGADGET: The Family is the Network: Pure Networks' Network Magic wants to make things simple

Whether it is through the micro-cell site when we are at sea, or the local carrier in port, I have no problem accessing local GSM networks on T-Mobile.

FORBES: Verizon Smartphones And Cruise Ships Don't Mix