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Similar to other kind of communication systems, the radio frequency modular of RSU in DSRC include many parts such ad antenna, duplexer, low noise amplifier, local oscillator, mixer, filter, modulator, demodulator, and so on. It's difficult to analyze every part in the system fully, so the emphasis is mainly on the parts designed and implemented for the RSU by myself.

和其它通信系统类似，专用短程通信系统路边单元的射频部分包含天线、双工滤波器、低噪声放大器、混频器、本振、滤波器、调制解调器等多个功能模块，论文中要完整地介绍和分析每一个功能模块是困难的，因此本文主要介绍自己亲自完成的部分。

I am using a Comet UH6V and will be changing to a different antenna soon, probably and planning on using a Ham Stick for 10, a Larsen NMO-50 for 6 and the Larsen 2/70 for 144/440 or maybe a Comet SB-15 and a HamStick and then one less duplexer.

我正用的是COMET的VH6V，不久就要换成其它天线，大概的计划是使用HAM STICK的型号10的天线，一根LARSEN NMO-50用在6米段，LARSEN 2/70用在144/440这两段，或者是一根COMET SB-15天线和一根HAMSTICK天线，再加上一个双工器。

As we all know today's mobile telephone, with antenna near to user's ear, eradiates high-density electromagnctic wave which brings harm to user's health.

众所周知，现有的手持式无线电话机因天线靠近人耳部位，使用时对人脑的电磁辐射密度较大，危害人体健康。

According to the feature of radiotelemetry capsule operating in the digestive tract,a novel antenna was designed for radiotelemetry capsule communicating with external data recorder at 915 MHz located in ISM bands.

针对遥测胶囊工作在人体消化道中的特点，为遥测胶囊设计了一种新型的微带天线，用于和外部数据接收存储器通信，工作频率为915 MHz波段。

Two large panniers starboard side of cabin, fore and aft of main landing gear on helicopter numbered 032 (forward panniers only on 031); starboard airstair-type cabin door, aft of flight deck, divided horizontally into upward- and downward-opening sections, with box fairing in place of window; hatch window deleted above starboard rear pannier; new TA-8Ka APU positioned ahove rear of engine bay fairing, with slot-type air intake at front of housing, displacing usual ESM and IR jamming pods, gives radar and antenna an independent power supply.

两舱右舷侧，脱颖而出，对直升机主起落架向后大背篓编号032（只在031向前背篓）；右舷airstair型舱门，飞行甲板尾部，分为向上和向下开节水平，有框窗地方整流罩；孵化窗口上面右舷后部储物删除；新大安8Ka的APU定位开槽式在屋前的进气发动机舱整流罩ahove后，取代了通常的ESM和红外干扰吊舱，使雷达天线和一个独立的电力供应。

Splash plate feed ; shaped medium ; return loss ; antenna gain

溅散板馈源；介质赋形；回波损耗；天线增益

Firstly, we simulate the signal received by OTHR in each antenna according to the real working condition, and save the signal datum in file. Secondly, we develop the signal processing program and the visual users interface. Thirdly, we utilize the simulation system to analyze Linear Frequency Modulated Continuous Wave OTHR system and Binary Phase-coded Continuous Wave OTHR system. Finally we compare the performance in suppression of interference of these two kinds of OTHR system.We achieve two aims in this simulation system.

本文首先根据OTHR的工作环境模拟OTHR各个阵元接收的回波信号，并将其保存为数据文件；然后根据OTHR的系统结构，编写信号处理程序，并给出可视化用户界面；最后利用OTHR仿真系统，对二相编码连续波和线性调频连续波这两种发射波形的OTHR作抗干扰性能分析。

The ship's vertical reference system is the measure instrument determining the level angles of a shipborne system,which is used abroad in the stabilization of the ship's antenna,the dynamic stabilization of the collimation ,the initial alignment of the helicopter's heading and attitude reference system,and the rapid transfer alignment of the long-distance fish torpedo and the missile on moving base.

船用垂直基准是确定船载系统动态水平姿态角的测量仪器，可广泛用于船载天线稳定、瞄线稳定、舰载直升机航姿系统的初始定姿，以及远程鱼雷、导弹的动基座快速传递对准等方面。

The ship"s vertical reference system is the measure instrument determining the level angles of a shipborne system,which is used abroad in the stabilization of the ship"s antenna,the dynamic stabilization of the collimation ,the initial alignment of the helicopters heading and attitude reference system,and the rapid transfer alignment of the long-distance fish torpedo and the missile on moving base.

船用垂直基准是确定船载系统动态水平姿态角的测量仪器，可广泛用于船载天线稳定、瞄线稳定、舰载直升机航姿系统的初始定姿，以及远程鱼雷、导弹的动基座快速传递对准等方面。

The concept of epoch difference is used to solve the unknown of antenna multiply figure, and to get the degree of multipath error by using Flourier transformation and nonlinear minimized square theory are analyzed, and good results are researched.

将历元差分的概念引如到解决天线增益图的不可知上，采用傅立叶变换和非线性最小二乘理论来解算多路径误差的大小，取得了一定的效果。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？