本文選題：WLAN + WIMAX��； 參考：《電子科技大學(xué)》2016年碩士論文

【摘要】：現(xiàn)代通信系統(tǒng)的核心業(yè)務(wù)從早期簡單的語音通話慢慢的轉(zhuǎn)變?yōu)閿?shù)據(jù)交換量巨大的多媒體服務(wù)。因此現(xiàn)代通信系統(tǒng)對通信容量及可靠性的需求越來越高。多輸入多輸出技術(shù)(Multiple Input Multiple Output;MIMO)可以在不增加發(fā)射功率的基礎(chǔ)上利用空間多徑性,獲得明顯的分集增益,有效增加信道容量和可靠性。將MIMO技術(shù)與WLAN(wireless local area network)技術(shù)和Wi MAX(world-wide interoperability microwave access)技術(shù)相結(jié)合,可以增加數(shù)據(jù)傳輸速率、提高通信質(zhì)量。所以相關(guān)多頻帶MIMO天線的研究是現(xiàn)代無線通信系統(tǒng)發(fā)展的一個焦點。超寬帶系統(tǒng)的發(fā)射功率較小,所以其傳輸距離比較近。將MIMO技術(shù)與超寬帶技術(shù)相結(jié)合,不但可以實現(xiàn)超寬帶系統(tǒng)的遠(yuǎn)距離傳輸,而且可以增加數(shù)據(jù)傳輸速率�？梢灶A(yù)見超寬帶MIMO系統(tǒng)前景廣闊,設(shè)計出性能良好的超寬帶MIMO天線有很強的實際應(yīng)用價值。本學(xué)位論文的內(nèi)容如下:1、提出了一款基于WLAN/WiMAX通信的緊湊型MIMO天線。天線輻射單元采用曲流技術(shù),實現(xiàn)多頻工作,測量結(jié)果顯示此款天線完整覆蓋WLAN和WiMAX頻帶。此款天線的創(chuàng)新點在于:采用開槽的方法實現(xiàn)天線的多頻化,經(jīng)過4次開槽之后天線輻射貼片的形狀類似于“F”型結(jié)構(gòu),通過調(diào)節(jié)枝節(jié)的長度可以很方便的調(diào)節(jié)工作頻率;在地板上,兩個輻射貼片之間延伸出一個多枝節(jié)的樹狀隔離枝節(jié)作為天線的隔離結(jié)構(gòu),有效提高了兩個輻射單元之間的端口隔離度。2、提出了一款共面波導(dǎo)饋電的三頻帶MIMO天線。該款天線引入互補開口環(huán)結(jié)構(gòu)實現(xiàn)多頻化,并引入隔離單元實現(xiàn)良好的端口隔離度。測量結(jié)果顯示此款天線完整覆蓋WLAN和WiMAX頻帶。該款天線的創(chuàng)新點在于:輻射單元采用互補開口環(huán)結(jié)構(gòu)實現(xiàn)多頻化;利用極化分集提高隔離度;利用樹狀隔離枝節(jié)提高天線系統(tǒng)的端口隔離度。3、提出了一款基于UWB通信的緊湊型MIMO天線,測量工作頻率為2.9GHz-13GHz,測量結(jié)果顯示此款天線完整覆蓋整個超寬帶頻帶。此款天線的優(yōu)點在于優(yōu)良的隔離度,價格低廉和全向輻射特性。該款天線的創(chuàng)新點在于:輻射單元采用共面波導(dǎo)饋電,展寬工作帶寬;利用極化分集提高隔離度;利用樹狀隔離枝節(jié)提高天線系統(tǒng)的端口隔離度。
[Abstract]:The core business of modern communication system has changed from simple voice call to multimedia service. Therefore, the demand for communication capacity and reliability of modern communication system is higher and higher. Multiple Input Multiple output Mimo) can obtain significant diversity gain without increasing transmit power, and increase channel capacity and reliability effectively. The combination of MIMO technology with WLAN(wireless local area network) technology and Wai MAX(world-wide interoperability microwave access) technology can increase the data transmission rate and improve the communication quality. Therefore, the research of correlated multi-band MIMO antenna is a focus of the development of modern wireless communication systems. UWB transmission power is small, so its transmission distance is relatively close. The combination of MIMO technology and UWB technology can not only realize the long-distance transmission of UWB system, but also increase the data transmission rate. It can be predicted that the UWB MIMO system has a bright future, and the design of UWB MIMO antenna with good performance has strong practical application value. This dissertation is as follows: 1. A compact MIMO antenna based on WLAN/WiMAX communication is proposed. The antenna radiation unit uses meandering technology to realize multi-frequency operation. The measurement results show that the antenna covers the WLAN and WiMAX bands completely. The innovation of this antenna lies in: the method of slot is adopted to realize the multi-frequency antenna. After four slots, the shape of antenna radiation patch is similar to that of "F" type structure, and the working frequency can be easily adjusted by adjusting the length of branch; On the floor, a multi-branch tree branch is extended between the two radiation patches as the isolation structure of the antenna, which effectively improves the isolation degree between the two radiation units. A three-band MIMO antenna fed by a coplanar waveguide is proposed. This antenna introduces complementary open loop structure to realize multi-frequency, and the isolation unit is introduced to achieve good port isolation. The measurement results show that the antenna covers the WLAN and WiMAX bands completely. The innovation of the antenna is that the radiation unit adopts the complementary open loop structure to realize multi-frequency, and the polarization diversity is used to improve the isolation degree. A compact UWB antenna based on UWB communication is proposed. The measured frequency is 2.9 GHz ~ 13 GHz. The measured results show that the antenna covers the whole UWB band completely. The advantages of this antenna are its excellent isolation, low price and omnidirectional radiation characteristics. The innovation of the antenna is that the radiation unit is fed by coplanar waveguide to widen the working bandwidth, polarization diversity is used to improve the isolation degree, and the tree isolation branch is used to improve the isolation degree of the antenna system.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TN820

【參考文獻】

中國期刊全文數(shù)據(jù)庫 前1條

1 楊曉非,劉銀碧,代睿;UWB技術(shù)及前景探討[J];數(shù)據(jù)通信;2003年04期

，

本文編號：1976994