A design method of mm wave mixer with double ridged waveguide used as signal port has been presented.

该文介绍用双脊波导作信号端制作毫米波宽频带混频器的设计方法。

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In this paper, the small signal port characteristics is established by the "perturbation signal feedback injection method", which lays a foundation of the system stability analysis.

本文在对系统进行适当简化的前提下，采用“扰动信号反馈注入法”建立了系统的小扰动端口特性，为系统的静态稳定性分析奠定了基础。

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You can also connect it to an HDMI or DVI port with aconvertor, since the digital signal is compatible.

当然，由于数字信号都是相互兼容的，你也可以用转接头把它和HDMI或DVI端口连接起来。

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Ships fitted with eLoran receivers will now be able to use the backup radio signal to reach port.

BBC: Navigational backup to aid ships in Dover straits

The cylindrical speaker features two high-performance drivers, a built-in bass port and digital signal processing software to extend frequency response on the high end while providing tighter low ends for deeper bass response.

ENGADGET: JBL freshens its portable speakers with Micro II, Bluetooth-toting Flip and Micro Wireless

At this juncture, we had to switch sources in order to get native 4K. This was served up by an ASUS gaming PC containing a Radeon HD 7970 -- AMD's flagship graphics card that can throw a 4K signal out of its HDMI 1.4 port.

ENGADGET: This is what native 4K home cinema looks like on Sony's VPL-VW1000ES projector