本文選題：可重構(gòu)天線 + 方向圖與頻率復合可重構(gòu)天線�。� 參考：《電子科技大學》2017年碩士論文

【摘要】：隨著無線通信技術(shù)的飛速發(fā)展,數(shù)據(jù)傳輸速率不斷提高,信道資源日趨緊張,成本、體積不斷壓縮已經(jīng)對無線系統(tǒng)性能提出了更高挑戰(zhàn)。面對日益增多的性能需求,無線系統(tǒng)一方面需要集成越來越多的天線,另一方面由于傳統(tǒng)的單功能天線成本高,體積大,功耗高,電磁耦合嚴重等缺點,已難以滿足當前的發(fā)展需求�；谝陨厦�,可重構(gòu)天線技術(shù)被相應提出,并受到越來越多研究人員的關(guān)注。可重構(gòu)天線可分為四大類:頻率可重構(gòu)天線、方向圖可重構(gòu)天線、極化可重構(gòu)天線與多參數(shù)復合可重構(gòu)天線。其中復合可重構(gòu)天線可實現(xiàn)單天線在多參數(shù)不同狀態(tài)下工作,因而極具價值,但由于理論研究欠缺,其設(shè)計難度也是可重構(gòu)天線中最高的。綜上,本文基于對復合可重構(gòu)技術(shù)的探討,對可重構(gòu)天線技術(shù)進行了相關(guān)研究并設(shè)計了五款可重構(gòu)天線,主要研究內(nèi)容及成果如下:1、基于單極子天線及寄生輻射原理實現(xiàn)了一款頻率可重構(gòu)天線,天線通過PIN開關(guān)控制寄生貼片的加載,從而實現(xiàn)頻率可重構(gòu)。對天線進行加工測試,相關(guān)結(jié)果表明,天線可以分別工作在超寬帶UWB單頻帶狀態(tài)或2.45GHz與超寬帶UWB雙頻帶狀態(tài)。2、設(shè)計實現(xiàn)了兩款方向圖可重構(gòu)天線。其一是基于漸變縫隙天線及單極子天線原理設(shè)計的一款梅花形寬帶方向圖可重構(gòu)天線,通過對該天線兩PIN二極管的通斷控制,可使天線工作在三種輻射模式:全向輻射和兩種端射模式。另一款基于半波長偶極子天線原理,通過對T形結(jié)兩臂的PIN二極管的開關(guān)控制,可實現(xiàn)分別對兩個偶極子結(jié)構(gòu)的饋電,從而實現(xiàn)天線在兩個端射方向上覆蓋WiMAX(3.3-3.6GHz)頻段的方向圖可重構(gòu)。3、在前面所設(shè)計的頻率可重構(gòu)天線及方向圖可重構(gòu)天線的基礎(chǔ)之上,將兩者進行綜合,設(shè)計實現(xiàn)了一款方向圖與頻率復合可重構(gòu)天線。該天線可實現(xiàn)2.5GHz與3.5GHz兩個頻率及三種端射方向圖的任意組合。4、研究介紹了基于新型材料的可重構(gòu)天線技術(shù),并基于液晶介電各向異性特性仿真了一款頻率與極化復合可重構(gòu)天線。仿真結(jié)果表明該天線在外加極化偏置電壓作用下可實現(xiàn)3.04-3.18GHz調(diào)諧,并通過兩PIN開關(guān)對饋電路徑進行切換,可實現(xiàn)垂直與水平極化的重構(gòu)。
[Abstract]:With the rapid development of wireless communication technology, the data transmission rate is increasing, channel resources are becoming increasingly tight, the cost and volume of continuous compression has posed a higher challenge to the performance of wireless systems. In the face of increasing demand for performance, wireless systems need to integrate more and more antennas on the one hand, and on the other hand, because of the disadvantages of traditional single-function antennas, such as high cost, large volume, high power consumption and serious electromagnetic coupling, etc. It has become difficult to meet current development needs. Based on the above contradiction, reconfigurable antenna technology has been proposed, and more researchers pay attention to it. Reconfigurable antennas can be divided into four categories: frequency reconfigurable antennas, pattern reconfigurable antennas, polarized reconfigurable antennas and multiparameter composite reconfigurable antennas. The composite reconfigurable antenna can work under different states of multiple parameters, so it is of great value. However, because of the lack of theoretical research, its design difficulty is the highest in the reconfigurable antenna. In summary, based on the discussion of composite reconfigurable technology, this paper studies the reconfigurable antenna technology and designs five reconfigurable antennas. The main research contents and results are as follows: 1. Based on the monopole antenna and parasitic radiation principle, a frequency reconfigurable antenna is implemented, which controls the loading of the parasitic patch through the PIN switch. The experiment results show that the antenna can be operated in UWB single band state or 2.45GHz and UWB dual band state. 2. Two reconfigurable antennas are designed and implemented. One is the design of a plum-shaped wideband pattern reconfigurable antenna based on the principle of gradient slot antenna and monopole antenna. The antenna can operate in three radiation modes: omnidirectional radiation and two end-emitting modes. The other is based on the half-wavelength dipole antenna principle. By controlling the switch of the T-junction two-arm PIN diode, the two dipole structures can be fed separately. Thus, the reconfigurable pattern of the antenna covering WiMAX (3.3-3.6 GHz) frequency band in two endshoot directions is realized. Based on the previously designed frequency reconfigurable antenna and the pattern reconfigurable antenna, the two reconfigurable antennas are integrated. A pattern and frequency complex reconfigurable antenna is designed and implemented. The antenna can realize any combination of 2.5GHz and 3.5GHz frequencies and three end-emitting patterns. The reconfigurable antenna technology based on new materials is introduced. A composite reconfigurable antenna with frequency and polarization is simulated based on the dielectric anisotropy of liquid crystal. The simulation results show that the antenna can be tuned at 3.04-3.18GHz under the action of external polarization bias voltage, and the feed path can be switched by two PIN switches, which can realize the reconstruction of vertical and horizontal polarization.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN820

【參考文獻】

相關(guān)期刊論文 前7條

1 杜靜;汪相如;黃子強;胡國媛;吳亮;;液晶的介電各向異性分布對液晶微帶線特性的影響[J];紅外與激光工程;2016年08期

2 肖紹球;柏艷英;王秉中;冉敏;;基于方向圖可重構(gòu)天線的新型寬角度掃描相控陣[J];微波學報;2010年S1期

3 蒲洋;;左/右旋圓極化可重構(gòu)微帶天線[J];微波學報;2010年S1期

4 王安國;張佳杰;王鵬;侯永宏;;可重構(gòu)天線的研究現(xiàn)狀與發(fā)展趨勢[J];電波科學學報;2008年05期

5 王靜;楊旭;莫亭亭;;60GHz無線通信研究現(xiàn)狀和發(fā)展趨勢[J];信息技術(shù);2008年03期

6 李劍;劉揚;段軍;;未來分布式無線通信系統(tǒng)發(fā)展趨勢[J];移動通信;2008年02期

7 肖紹球,王秉中;微帶可重構(gòu)天線的初步探討[J];電波科學學報;2002年04期

相關(guān)博士學位論文 前4條

1 劉君英;可重構(gòu)微帶天線研究[D];中國科學技術(shù)大學;2008年

2 魏文博;可重構(gòu)天線研究[D];西安電子科技大學;2008年

3 楊雪松;微帶可重構(gòu)天線研究[D];電子科技大學;2006年

4 肖紹球;平面型可重構(gòu)天線研究[D];電子科技大學;2003年

，

本文編號：2070944