本文選題：小型化 + 超寬帶　； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：隨著無線通信的迅猛發(fā)展,人們對通信容量及可靠性的需求越來越高。超寬帶(Ultra Wideband;UWB)技術(shù)因其具有頻譜資源豐富、傳輸速率快以及抗干擾性能強(qiáng)等諸多優(yōu)點(diǎn),在無線通信當(dāng)中擁有不可估量的研究價(jià)值。然而超寬帶技術(shù)因其輸出功率被限制在一個(gè)很低的范圍,其傳輸距離很近,很難實(shí)現(xiàn)遠(yuǎn)距離傳輸。多輸入多輸出(Multiple Input Multiple Output;MIMO)技術(shù)具有抗多徑衰落能力,能夠獲得分集增益有效地提高接收端的信噪比。將UWB技術(shù)與MIMO技術(shù)結(jié)合,利用空間多徑性,多路信號并行傳輸,獲得明顯的復(fù)用增益與分集增益,有希望實(shí)現(xiàn)信號遠(yuǎn)距離穩(wěn)定傳輸。天線作為任何無線接收機(jī)和發(fā)射機(jī)當(dāng)中必不可少的元器件,一直深受廣大研究者的熱愛。而超寬帶MIMO天線小型化、高隔離度的實(shí)現(xiàn)更是現(xiàn)如今的研究焦點(diǎn)。同時(shí),由于美國聯(lián)邦通信委員會(huì)(The Federal Communication Commission;FCC)于2002年2月公開的商用超寬帶頻段為3.1-10.6GHz,此頻段與其他系統(tǒng)的工作頻段有部分重疊,為了避免其對超寬帶系統(tǒng)的干擾,需要濾除這些頻段的信號,如目前較成熟的全球微波互聯(lián)(Worldwide Interoperability for Microwave Access;WiMAX)系統(tǒng)和無線局域網(wǎng)絡(luò)(Wireless Local Area Networks;WLAN)系統(tǒng),但是在小型化超寬帶MIMO天線上實(shí)現(xiàn)效果優(yōu)良的阻帶,這方面的研究十分缺乏,因此具有阻帶特性的超寬帶MIMO天線亟需研究。本文主要是基于超寬帶MIMO天線的研究,所完成的工作有以下方面:(1)對UWB技術(shù)和MIMO技術(shù)的發(fā)展歷程做了簡單介紹,并簡要分析了它們具有的優(yōu)勢;闡述了MIMO天線的發(fā)展歷程;簡單介紹了超寬帶MIMO天線的基本參數(shù);并對天線設(shè)計(jì)的數(shù)值方作了概括;分析了MIMO技術(shù)的分集方式。(2)總結(jié)了應(yīng)用比較廣泛的天線小型化技術(shù)。設(shè)計(jì)并分析了一款具有藍(lán)牙及超寬帶特性的雙極化MIMO天線,采用了四分之一圓環(huán)接地面,延長了電流的有效路徑,拓寬了天線工作頻段,天線工作頻率為2.3-12.5 GHz,覆蓋了藍(lán)牙頻段和超寬帶頻段,同時(shí)引入了叉形支節(jié),有效地提高了端口隔離度,端口隔離度大于15 dB。對輻射方向圖進(jìn)行了研究,兩端口輻射方向圖成正交分布,從而天線能同時(shí)輻射垂直極化波和水平極化波;另外基于MIMO技術(shù)中的角度分集方式,設(shè)計(jì)了一款角度分集的超寬帶MIMO天線,天線采用從天線背部激勵(lì),微帶饋電的方式,能靈活調(diào)節(jié)端口匹配,縮小天線尺寸,天線工作在3.1-10.6 GHz的頻率范圍內(nèi),端口隔離度大于15 dB。(3)總結(jié)了天線阻帶技術(shù),設(shè)計(jì)了兩款具有阻帶特性的超寬帶MIMO天線。一款具有WLAN阻帶特性的超寬帶MIMO天線,天線利用矩形SRR結(jié)構(gòu)獲得WLAN阻帶特性,天線工作頻率覆蓋了2.5-12 GHz,在5.1-6 GHz頻段處具有良好的阻帶特性,同時(shí)端口隔離度大于15 dB。另一款具有雙阻帶特性的超寬帶MIMO天線,在天線輻射貼片上引入了兩個(gè)半徑不同的圓環(huán)SRR結(jié)構(gòu),分別實(shí)現(xiàn)了WiMAX頻段和WLAN頻段的阻帶,該天線能工作在2.2-12 GHz頻段,并在3.2-3.65 GHz和5.2-6 GHz的頻段處產(chǎn)生阻帶,端口隔離度大于15 dB。
[Abstract]:With the rapid development of wireless communication, people demand for communication capacity and reliability of the increasingly high. Ultra wideband (Ultra Wideband; UWB) technology because of its rich spectrum resources, the advantages of fast transmission speed and strong anti-jamming performance, have research value immeasurable in wireless communication. However, because of the ultra wideband technology the output power is limited to a very low range, the transmission distance is very near, it is difficult to achieve long-distance transmission. Multiple input multiple output (Multiple Input Multiple Output; MIMO) technology has the advantages of anti multipath fading, diversity gain can be effectively improve the SNR of the receiver. The combination of UWB technology and MIMO technology, the use of space multipath, parallel transmission of multiple signals, obtained obvious multiplexing gain and diversity gain, to achieve a stable signal transmission distance. Antenna as any wireless receiver and transmitter Among the essential components of love, has been well received by the researchers. The ultra wideband MIMO antenna to achieve miniaturization, high isolation is the focus of research nowadays. At the same time, the U.S. Federal Communications Commission (The Federal Communication Commission; FCC) on February 2002 public commercial ultra wideband frequency of 3.1-10.6GHz, the band and the other system operating frequency overlap, in order to avoid the interference of UWB system, signal filtering of these bands, such as mature world Interoperability for microwave (Worldwide Interoperability for Microwave at Access; WiMAX) system and wireless local area network (Wireless Local Area Networks; WLAN), but in the miniaturized ultra wideband MIMO the antenna to achieve the effect of excellent stopband, is the lack of research in this area, it is ultra wideband MIMO antenna to stopband. The This paper mainly studies the ultra wideband MIMO antenna based on the work done by the following aspects: (1) the development of UWB technology and MIMO technology are introduced briefly, and analyzes their advantages; expounds the development process of MIMO antenna; introduces the ultra wide band antenna MIMO basic parameters in the antenna design; numerical analysis and summarized; the diversity of MIMO technology. (2) summarizes the miniaturization of antenna technology is widely used. Design and analysis of dual polarization MIMO antenna with a Bluetooth and ultra wideband characteristics, the 1/4 ring ground, extend the effective current path the widening the antenna frequency, operating frequency of the antenna is 2.3-12.5 GHz, covering the Bluetooth frequency band and ultra wideband, while the introduction of the forked branch section, effectively improve the port isolation, port isolation is greater than 15 dB. of radiation The research of map, two port radiation pattern into orthogonal distribution, which can simultaneously antenna radiation of vertical and horizontal polarization wave; the other MIMO technology based on the angle of diversity, the ultra wideband MIMO antenna with a diversity antenna design angle, using the back of the drive from the antenna, the microstrip feed way, can the flexible adjustment of port matching, reduce the size of the antenna antenna operating in the frequency range 3.1-10.6 GHz, port isolation is greater than 15 dB. (3) summarizes the stopband antenna technology, has designed two kinds of ultra wideband MIMO antenna stopband. An ultra wideband MIMO antenna WLAN stopband, using antenna the structure of SRR WLAN rectangular stopband characteristics, operating frequency of the antenna covers 2.5-12 GHz, has good stopband characteristic in the 5.1-6 GHz band, and the port isolation is greater than 15 dB. with another ultra wideband MIM dual stopband The O antenna has introduced two SRR structures with different radii on the antenna patch. It has achieved WiMAX band and WLAN band stopband respectively. The antenna can work in the 2.2-12 GHz band, and produce stopband at the frequency band of 3.2-3.65 GHz and 5.2-6 GHz, and the port isolation is more than 15 dB..

【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】：2014
【分類號】：TN919.3;TN820

【參考文獻(xiàn)】

相關(guān)期刊論文 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

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本文編號：1737265