分类：设计开发    下载：0    浏览：313    时间：2017-08-10

何山红 朱旭东 （南京电子技术研究所，江苏南京） 摘要运用相关处理方法对互耦情况下的宽频带干涉仪测向圆阵特性进行了分析，研究了互耦存在时的宽频带干涉仪测向圆阵设计原则。 关键词干涉仪，测向圆阵，互耦

分类：设计开发    下载：1    浏览：378    时间：2017-08-10

摘　要：为使均匀圆阵能进行相关信号的全方位DOA估计及提高系统性能,论文利用基于自适应天线理论方向图综合技术的子圆阵构成复合式测向均匀圆阵,再运用混合DOA估计方法进行DOA估计.仿真结果证明复合式测向均匀圆阵在一定程度上使分布区域较广的相关信号的DOA估计成为可能;增加了可检测的信源数目;提高了系统抗干扰能力及分辨率、使系统判模糊能力增强、稳健性能增加.

分类：天线资料    下载：0    浏览：674    时间：2017-08-10

何山红   傅永生 (南京电子技术研究所.江苏南京  东南大学移动通信国家重点实验室.江苏南京) 摘要：介绍了作为反射面天线馈源的宽频带+双极化+恒波束四脊喇叭.运用有限元和模式匹配相结合的混合法详细推导且计算了四脊喇叭的广义散射矩阵1然后运用口面积分计算了四脊喇叭的辐射远场.给出了四脊喇叭和用四脊喇叭做馈源的反射面天线的实测结果1 关键词：四脊喇叭.馈源.有限元法.模式匹配法.混合法.广义散射矩阵

分类：天线资料    下载：0    浏览：512    时间：2017-08-10

Abstract In this paper, a novel dual-band broadband array antenna with low profile and dual polarization is proposed and developed. The array is formed by arc-probe-fed annular ring elements and pairs of cross microstrip dipoles nested together. The bandwidth of the annular ring antenna is improved through arc-probe-fed technique. The measured impedance bandwidths determined by VSWR<2 cover 806~960 MHz and 1710~2170MHz. The port isolation and the symmetry of the radiation for the lower band are improved by the “anti-phase and dual-feed” technique which also reduces the cross polarization level. The influences on the radiation patterns of upper band caused by the phase error are invested and the radiation patterns are improved through the phase compensation. In the end, the array is designed and the simulated and measured results are presented. The proposed array antenna is highly applicable to the base station of multi-band operations. Key words: Dual-band antenna, Dual-polarization, Broadband, Annular antenna, Printed microstrip dipole

分类：天线资料    下载：0    浏览：566    时间：2017-08-10

Abstract In this paper, a novel linear array antenna is proposed and investigated experimentally and the measured results are plotted. The measured impedance bandwidth determined by VSWR<1.5 covers 1710~2170MHz and the port isolation is better than -30dB by additive isolated conducting frames which change the other array characters very little. The cutting slots in the side walls of the ground provide the given HPBW of 90±8°(Half-Power Beam Width) in azimuth plane and maintain a stable array characters. The antenna has a high front-to-back ratio of radiation pattern of 25dB and a low cross polarization level (-10dB in the forward region and -22dB on the axes of peak gain). The array formed by printed microstrip antennas mainly features in the slots and the isolated conducting frames which ensure the array characters satisfy the wireless communication criterions. The array antenna is highly suitable for the base station applications for 3G system. Key words: Base station antennas, Broadband, Dual-polarization, Port isolation, Cross polarization

分类：天线资料    下载：0    浏览：488    时间：2017-08-10

ICWMMN(国际无线、移动和多媒体网络会议) 2006论文集 Abstract A novel linear array formed by diamond antennas with low profile and high isolation is developed and studied experimentally in this paper. The array can provide unidirectional patterns with a HPBW (Half-Power Beam Width) of 65±6° in azimuth plane and more than 15dBi peak gain in 1710-2170MHz with VSWR<1.5. The antenna consists of five dual-polarized array elements named “four-diamond” antenna. The isolation of two different polarized input ports of the array can be enhanced to -30dB by employing some isolation enhancement technologies. A dual-polarized broadband linear array is fabricated and the measured results are presented. The proposed array antenna is suitable for the GSM1800, CDMA1900 and ITU’s IMT-2000 base station applications. Key words: Base Station Antenna, Dual-polarization, Broadband, Isolation Enhancement, Four-diamond antenna

分类：天线资料    下载：2    浏览：702    时间：2017-08-10

移动通信终端天线设计  吴群 共5章

分类：天线资料    下载：2    浏览：553    时间：2017-08-09

目录 1无线电波的基本知识 2超短波的传播 3天线辐射电磁波的基本原理 4关于传输线的几个基本概念 5典型的移动基站天线技术指标综述 6通信距离方程

分类：天线资料    下载：1    浏览：770    时间：2017-08-09

目    录 一、天线的基本特性 1、          天线辐射的方向图 2、          天线的增益 3、          天线的驻波比 4、          天线的极化 5、          天线参数在无线组网中的作用 6、          通信方程式。 二、网络优化中的天线 1、          网络优化的概念 2、          网络优化的主要内容 3、          网络优化中天线的作用 三、海天公司为无线网络优化研制的天线介绍 1、          遥控电调电下倾天线 2、          公路双向天线 3、          高速公路覆盖用的高增益天线 4、          120o双极化天线 5、赋形天线

分类：天线资料    下载：4    浏览：615    时间：2017-08-09

第一部分：天馈线安装与测试

分类：天线资料    下载：4    浏览：673    时间：2017-08-09

天馈系统应用知识问答

分类：天线资料    下载：7    浏览：617    时间：2017-08-09

106个问题，涉及天线基础及实际工程安装