本文選題：漏泄同軸電纜 + 縱向衰減　； 參考：《西安電子科技大學(xué)》2015年碩士論文

【摘要】：漏泄同軸電纜(簡稱漏纜)是一種外導(dǎo)體具有槽孔結(jié)構(gòu)的同軸電纜。它既能傳輸信號又能發(fā)射或接收信號,具有信號傳輸線與天線的雙重功能。漏纜因其環(huán)境適應(yīng)能力強(qiáng)、損耗小、信號覆蓋均勻、場強(qiáng)穩(wěn)定性高等優(yōu)點(diǎn),不僅廣泛應(yīng)用于隧道、地鐵、地下停車場、電梯等對信號接收質(zhì)量要求高的封閉或半封閉空間,還應(yīng)用于日益?zhèn)涫荜P(guān)注的安防領(lǐng)域。論文針對地鐵、高鐵無線通信系統(tǒng)用寬帶漏泄同軸電纜的應(yīng)用需求,依據(jù)通信行業(yè)標(biāo)準(zhǔn)YD/T2491-2013,闡述了漏泄同軸電纜的理論基礎(chǔ),設(shè)計(jì)了L形、U形、Ⅲ形和八字形四種不同槽孔結(jié)構(gòu)的漏纜,建立了基于三維電磁仿真軟件HFSS的漏泄同軸電纜電磁仿真模型。以漏纜主要電氣性能指標(biāo)為研究目標(biāo),針對不同工作頻率,基于四種不同周期槽孔結(jié)構(gòu)的漏泄同軸電纜,利用電磁仿真軟件分析了槽孔節(jié)距與槽孔尺寸的變化對耦合損耗與縱向衰減的影響。針對工作頻率900MHz的漏纜,優(yōu)化了外導(dǎo)體含有L形、U形和八字形三種槽孔結(jié)構(gòu)的縱向衰減與耦合損耗特性。設(shè)計(jì)和實(shí)現(xiàn)了U形和Ⅲ形漏泄同軸電纜。并實(shí)際測量了縱向衰減和耦合損耗,實(shí)測結(jié)果和仿真結(jié)果吻合良好。通過仿真分析和樣品實(shí)測表明U形和Ⅲ形漏纜設(shè)計(jì)滿足無線通信系統(tǒng)標(biāo)準(zhǔn)要求。
[Abstract]:Leaky coaxial cable is an outer conductor coaxial cable with slot structure.It can transmit signal and transmit or receive signal. It has the dual function of signal transmission line and antenna.Because of its strong adaptability to environment, low loss, uniform signal coverage, high stability of field strength and so on, leakage cable is not only widely used in closed or semi-closed space of tunnel, subway, underground parking lot, elevator and so on, which requires high quality of signal reception, etc.It is also used in the field of security, which is attracting more and more attention.Aiming at the application demand of wideband leakage coaxial cable for subway and high-speed railway wireless communication system, according to YD / T2491-2013, the paper expounds the theoretical basis of leakage coaxial cable, and designs L-shaped coaxial cable.The electromagnetic simulation model of leakage coaxial cable based on 3D electromagnetic simulation software HFSS is established.Aiming at the main electrical performance indexes of leaky cable, the leakage coaxial cable based on four different period slot structures is designed for different working frequencies.The effects of slot pitch and slot size on coupling loss and longitudinal attenuation are analyzed by electromagnetic simulation software.The longitudinal attenuation and coupling loss characteristics of external conductors with L-shaped U-shaped and octahedral grooves are optimized for leakage cables of 900MHz at operating frequency.U-and 鈪，

本文編號：1740941