4G、5G共建天馈整合方案

随着5G 700 MHz频段建设许可的获批,现有移动网络空口频段再填新成员.对于已经负重累累的楼面、塔顶,需要慎重选择天馈整合方案,以保障4G、5G网络协同共存.通过一站一方案的精细规划和设计,确保4G网络质量的同时开展5G基站建设,降低干扰,以多样化的频段、天面方案应对不同业务场景的复杂需求.     

4G/5G协同无线网工程建设方案

如何处理好4G/5G在资源上的矛盾,解决好二者之间的协同,是当前无线网规划与工程建设面临的新课题。首先结合中国移动5G 2.6 GHz频率使用策略,提出面向4G/5G协同的工程建设方案,随后聚焦4G/5G天面协同,以中国移动现网多制式多频段天馈现状为出发点,提出“最佳三副、最少两副”的天面目标形态建议,并针对原有4 G D频段天馈调整、5G天馈建设给出分场景工程建设方案。     

4G/5G共模协同权值优化方法的研究

随着5G多频段组网的开始，天面资源日益紧张，5G建设主要在4G站址上共模改造新建5G，同时替换4G的D频段设备并反向开通LTE的Massive MIMO。该组网场景下4G和5G共模共天馈，可以实现4G/5G共AAU场景下的天馈协同优化。重点研究了4G/5G共AAU场景下的天馈协同优化方案，以路测和测量报告等数据为输入源，对弱覆盖、高干扰和重叠覆盖区域进行识别，并联动寻优天线覆盖场景的最佳权值、方位角和下倾角等参数，达到4G/5G综合覆盖性能最优。     

广电700 MHz 5G网络浅层覆盖方案探讨

中国5G已经进入规模建设时代.从工信部划分的商用频段来看,中国广电拥有700 MHz的黄金频段.广电可基于中国广电700 MHz 5G系统的建设需求,结合科学的建模方式和数字化规划手段进行合理规划布局,考虑天馈选型、频率规划与干扰,快速部署700 MHz 5G网络,实现浅层优质覆盖,有力支撑市场业务发展,同时便于加快自...     

移动5G试验网天面改造及整合方案探讨

在中国正式进入5G商用时代的大背景下,5G网络建设将引入新的天面资源需求,在当前移动的2G/3G/4G多制式并存、天面资源紧张的情况下,势必涉及对现网天馈系统的融合改造。文章从解决移动5G天面建设过程中存在的一些问题出发,从天面改造、天面整合等方面阐述如何合理、有效、快速地建设5G天面。最后以某市移动的成功解决案例,说明现阶段移动5G试验网天面建设的一些可行性做法,及对未来5G天面建设的积极意义。     

5G时代4G/5G共天馈面解决方案

4G建设时期,存在站点天面资源紧缺、无法新增抱杆、物业协调困难等问题,因此,5G时代在现有站点上新增抱杆的需求较难实现,如何实现4G/5G天线共天馈面及快速部署异常紧迫。探讨了4G/5G共天馈面的解决方案,提出一种适合中国电信单抱杆场景网络建设的天馈面解决方案,可以解决5G网络建设中无法新增抱杆、物业协调困难的问题。由于不增加天面资源,可减少铁塔租金,降低网络运营成本,同时可实现5G网络部署简化、便捷、高效。     

基于F2频点软扩解决农村和城区LTE高负荷区域的方法研究

目前是中国移动4G网络发展的第三个年头,移动4G用户逐年增长,今年也是承上启下的"关键年";一方面,承上主要是按集团公司"广度+深度+厚度"的网络建设理念更加完善和优化4G网络,基于F频段的广覆盖大网已初具规模,城区4G综合覆盖率能达到99%以上,农村和高速路段也能达到4G连续覆盖。厚度主要是基于D频段的容量覆盖,以解决城市热点区域的局部高负荷容量需求。深度主要是基于D频段微站设备和F频段拉远小区以解决道路、小区等场景的"盲区"覆盖;另一方面,启下主要是中国移动重要转型的VOLTE语音和视频业务。目前中国移动建设4G网络主要考虑"BBU+RRU+天馈系统"的方式,基带单元和射频单元分离以达到物理层和MAC层等上层业务的分离,前期F频段建设广覆盖大网的RRU和天线大多只支持FA频段,也是为了TDS业务插板卡直接升级的业务需求,在网络建设后期的"厚度+深度"理念,D频段建设和微站建设都需要重点考虑天面和铁塔资源,在部分城区和农村高负荷区域由于天面和铁塔资源不够,导致不能架设D频段或微站的硬件设备从而引发一系列的高负荷小区一直无法处理,对客户业务感知造成较大影响。文章通过论证在现有F1频点的基础上软件扩容F2频点小区,开启F1频点小区和F2频点小区的覆盖均衡功能,将部分高负荷用户"迁移"到软扩的F2频点小区,解决高负荷小区并总结了具体实施方法,对后续扩容工作的开展积累了经验。     

无线基站天馈系统改造应用

<正>针对基站楼顶面积狭小，需进行多系统全频天线整合，结合现场实际情况制定解决方案，对原有抱杆改造等措施解决安装天线问题。目前三家运营商共享铁塔产权站址天面，随着覆盖和容量的需求增加，建设多频段制式网络，目前基站天面资源已满、平台不足、无法新增抱杆，为加快5G网络建设，需对现网天线进行整合改造。     

基于AOA大数据精细RF优化方法研究

随着5G基站的大批量新建安装,必然伴随着新型5G天线的安装,使得现有天面资源日趋紧张。为了确保5G天线成功安装,有必要对现有的2/3/4/5G天面资源进行整合。目前设备上主要通过换装4488等多通道多频段天线实现,换天线后,带来了覆盖和质量的改变,对无线性能产生了较大影响。本策略针对5G建设中天面资源整合遇到的无线性能改变,总结制定基于AOA大数据策略,实施精细RF优化,提升覆盖性能。     

广电5G融合组网基站天馈系统建设方案的研究

随着5G牌照和相关频率许可的落地,广电5G试验网已在各个省份逐步开展,其基站建设速度也在稳步推进.面对不断稀缺的基站天馈资源,如何进行5G基站天馈系统的建设成为摆在广电网络建设部门前的一道难题.通过分析广电5G基站的天馈设备的技术特点和与中国移动的共建共享策略,提出广电5G融合组网的基站天馈系统建设方案,包括新建站的杆...     

Antenne tribande pour faisceaux hertziens numériques à grande capacité

The introduction on microwave networks of digital high spectral efficiency systems needs the use of very high performances antennas. Principally a high cross-polarization discrimination. Multiband antennas are suitable solutions to the overload of the towers or pylones. A dichroic subreflector is the proposed solution to design such an antenna. The access of several frequency bands on the same antenna feeder is realized with the use of band diplexers and circulators which must have a very low intermodulation level.     

SOP integration and codesign of antennas

The successful deployment of wireless systems requires the integration of small, cost-effective antennas while preserving a reasonable electrical performance in the required bandwidth. This paper begins with a short overview of the most important antenna characteristics, and then uses these to describe the minimum requirements and fundamental performance-size limits for electrically small integrated antennas. The performance-size tradeoff is further illustrated by the design of a planar integrated antenna for WLAN. Codesign guidelines are given to avoid parasitic coupling between the integrated antenna and RF circuits. A concluding comparison is made between on-chip and on-package integration of a small antenna for microwave and millimeter wave systems.     

Sleeve antenna with ground wires

Pocklington's integral equation for a sleeve antenna with ground wires is formulated. By applying the Galerkin method to this equation, a sleeve antenna, a monopole antenna with ground wires, and a sleeve antenna with ground wires are analyzed, and numerical results for these antennas are compared with measured data. The sleeve antenna features the leakage current on the surface of the coaxial feeder, suppressed by a sperrtopf, but it is mismatched with the 50-Ω feeder. The monopole antenna with inclined ground wires may be adjusted to match the 50-Ω feeder, but the leakage current induced on the feeder cannot be neglected. It is found that the sleeve antenna with ground wires has the advantages of both antennas     

测控通信系统中的天线新技术

探讨了测控通信系统中的天线新技术,分析了目前测控天线面临的技术困境和相应的解决办法.详细研究了天线组阵、数字多波束天线以及共形有源相控阵天线的可行性,并对目前的技术趋势作了探讨.最后给出了测控天线发展的新方向和形式,指出在测控通信系统中,测控天线将会向智能蒙皮、大规模集成、超宽带、小型化、低RCS等方向发展;频段将由微波频段向毫米波频段,甚至光波段延伸;新兴天线将会融合多种技术,性能必将进一步提升,更能满足用户需求.     

Wideband CPW-Fed Spiral-Shaped Slot Antenna for Wireless Applications

A new compact design of CPW-fed wideband (WB) spiral-shaped slot antenna is proposed. The proposed antenna has a compact size with overall dimensions 37-33 mm and is fabricated on FR4 substrate with dielectric constant ? _r = 4.4 and thickness h = 1.6 mm. With the different length of the spiral-shaped slots, simulated and experimental results of the antenna are suitable for WB operations. The–10 dB bandwidth of the WB antenna from measurement is approximately 115.2% (2.36–8.53 GHz). The proposed antenna provides nearly omni-directional radiation characteristics. The new antenna configuration operates in several different bands: 2.4, 3.5, 5.2, 5.5, and 5.8 GHz covering 2.4/5.2/5.8 GHz WLAN bands and 2.5/3.5/5.5 GHz WiMAX bands. The results for S₁₁, far-field H- and E-plane radiation patterns and gain of the proposed antennas are presented and discussed. The agreement between measured results and full-wave simulation validates the feasible configuration of the proposed antennas.     

典型城市TD-LTE引入策略研究

本文以典型城市为例,首先对现网的2G与TD-SCDMA业务现状进行了深入地分析,在充分利用现网业务分析、现网站址资源分布及特点、天线挂高、下倾角等多维数据的基础上,给出了典型城市下TD-LTE引入的总体部署、频率规划、站址选择与规划、天馈建设、室内覆盖等策略,这可为工程设计人员对TD-LTE城市引入思路提供相应的参考和借鉴。     

一款面向5G微基站的双频双极化电磁偶极子天线的设计与分析

小型化是进行5G微基站天线设计的重要考虑因素,文中设计了一款适用于5G微基站的电磁偶极子天线. 天线由一对正交放置的单极化电磁偶极子、一对交叉放置的渐变式Γ形馈电线、一个圆形寄生贴片和一块正方形反射板组成,工作频段为2.50~3.62 GHz和4.8~5.0 GHz,能够覆盖工信部规定的5G的全部中频段. 在工作频带内,天线的输入回波损耗小于?10 dB;端口隔离度在低频段小于?25 dB,在高频段小于?42 dB;仿真平均增益在高、低频部分分别为5.57 dBi和9.84 dBi. 该天线能够实现双频段和双极化,可以作为小型化微基站天线设计的参考,同时为5G天线的商用化提供参考.     

E-shaped patch antennas for high-speed wireless networks

Thin, broad-band, E-shaped microstrip patch antennas (ESPAs), operating in the 5-6 GHz frequency range, are presented. They are intended for high-speed (IEEE 802.11a, 54 Mb/s) wireless computer local area networks (WLAN) and other wireless communication systems. They are suitable for WLAN adaptor cards in the PCMCIA (also known as PC) format, allowing users of current notebook computers to upgrade to this high-speed wireless standard at a low cost. Importantly, our antennas are thin enough to be accommodated in a PCMCIA card of standard 5-mm thickness, without making the antenna end thicker than the card itself. Two different closely spaced antenna pairs are also presented for diversity. A new ESPA configuration with a microstrip feed is presented for easy integration with microwave transceivers. In all cases, within the two IEEE 802.11a WLAN bands (5.15-5.35 GHz and 5.725-5.825 GHz), the reflection coefficient at the antenna input is <-10 dB and in both antenna pairs, mutual coupling between the two antennas is <-20 dB.