【摘要】：隨著電磁信息的復(fù)雜以及工作環(huán)境的多樣化,各種無線通信系統(tǒng)對天線的要求也越來越嚴(yán)格。設(shè)計(jì)精良的天線就等同與好的能量轉(zhuǎn)換器,對于電磁波的高效率發(fā)射與接收起著至關(guān)重要的作用。然而根據(jù)工作需求不同,則要求通信系統(tǒng)工作環(huán)境不同,這就要求擁有多功能的天線來代替單一性能的傳統(tǒng)天線,以滿足變化的工作環(huán)境�？芍貥�(gòu)天線具有頻率、方向、極化方式的可變性,故而普遍應(yīng)用于無線通訊系統(tǒng)中。本論文主要由理論分析到仿真,最后到實(shí)驗(yàn)驗(yàn)證為整體流程來完成。詳細(xì)闡述了天線設(shè)計(jì)及其實(shí)驗(yàn)過程。在本文的第三章中,詳細(xì)描述了一種金屬地板上淺挖L型寬槽的頻率可重構(gòu)天線。通過在天線地板挖L型槽以及微帶上的F型輻射片來使得天線的匹配最好,并且利用一個(gè)PIN二級(jí)管來控制電路通斷狀態(tài),使天線實(shí)現(xiàn)兩種相異的輻射狀態(tài)。這兩種狀態(tài)所覆蓋的頻段分別是3.18-4.98 GHz, 4.88-5.88 GHz,包含了 WLAN,WiMAX中的大部分頻帶。本設(shè)計(jì)中僅用了一個(gè)開關(guān)二極管便實(shí)現(xiàn)了多個(gè)無線網(wǎng)與無線局域網(wǎng)所需求的頻段,并且該天線的尺寸比較小(22.1×23.85 mm),這是該設(shè)計(jì)的一大優(yōu)點(diǎn)。最后對天線進(jìn)行實(shí)驗(yàn)驗(yàn)證,經(jīng)過分析與仿真情形保持一致。本文的第四章描述的是一款既可以達(dá)到方向圖可重構(gòu),也可以達(dá)到頻率可重構(gòu)的平面天線。從天線的布局、尺寸優(yōu)化、反射S11曲線來敘述此天線的設(shè)計(jì)。在國內(nèi)外的文獻(xiàn)中可以獲知,同一個(gè)天線可以通過簡單調(diào)節(jié)來完兩種可重構(gòu)方式的組合,而且保持結(jié)構(gòu)簡單,是比較少的,因此,這也是本次設(shè)計(jì)的一大優(yōu)勢。該天線在中心頻率0.87 GHz與0.94 GHz處發(fā)生了頻率可重構(gòu),在0.94 GHz、1.14 GHz處發(fā)生了兩種方向圖的可重構(gòu),通過調(diào)節(jié)在3.3 GHz處實(shí)現(xiàn)了三種方向圖的可重構(gòu)。并且實(shí)現(xiàn)了 UHF頻段與WiMAX頻段的切換,而且實(shí)測結(jié)果與仿真結(jié)果相符合。高精度、高效率、低損耗、低頻小型化等是天線發(fā)展的重點(diǎn),未來可重構(gòu)天線的發(fā)展也是任重而道遠(yuǎn)。
[Abstract]:With the complexity of electromagnetic information and the diversification of working environment, various wireless communication systems require more and more strict antenna. Well-designed antennas are equivalent to good energy converters and play a vital role in the efficient transmission and reception of electromagnetic waves. However, according to the different working requirements, the communication system working environment is different, which requires a multi-functional antenna to replace the single performance of the traditional antenna to meet the changing working environment. Reconfigurable antennas are widely used in wireless communication systems because of their variability in frequency, direction and polarization. This paper is mainly from theoretical analysis to simulation, and finally to the whole process of experimental verification. The antenna design and its experimental process are described in detail. In the third chapter, a frequency reconfigurable antenna is described in detail. By digging the L-shaped slot on the antenna floor and the F-shaped radiator on the microstrip to make the antenna match best, and using a PIN two-stage tube to control the on-off state of the circuit, the antenna can realize two different radiation states. The frequency bands covered by these two states are 3.18-4.98 GHz, 4.88-5.88 GHz, which contain most of the frequency bands in WLAN,WiMAX. In this design, only one switching diode is used to realize the frequency bands required by multiple wireless networks and wireless local area networks, and the size of the antenna is relatively small (22.1 脳 23.85 mm), which is one of the advantages of the design. Finally, the antenna is verified by experiments, and the results are consistent with the simulation results. In chapter 4, we describe a planar antenna which can be reconfigurable as well as frequency. The design of the antenna is described from the antenna layout, size optimization and reflection S 11 curve. It can be found in the literature at home and abroad that the combination of two reconfigurable modes can be completed by simple adjustment of the same antenna, and it is relatively few to keep the structure simple. Therefore, this is also a major advantage of this design. The antenna can be reconfigurable at the center frequency of 0.87 GHz and 0.94 GHz, and two patterns at 0.94 GHz,1.14 GHz. The reconfiguration of the three patterns is realized at 3.3 GHz by adjusting the frequency of the antenna. The switching between the UHF band and the WiMAX band is realized, and the measured results are in agreement with the simulation results. High precision, high efficiency, low loss and low frequency miniaturization are the key points of antenna development.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN820

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 余文革;巫正中;楊廷鴻;付詩祿;;新型可重構(gòu)RF-MEMS天線的設(shè)計(jì)[J];后勤工程學(xué)院學(xué)報(bào);2008年03期

相關(guān)博士學(xué)位論文 前1條

1 陳軼博;可重構(gòu)微帶天線及寬帶圓極化微帶天線研究[D];西安電子科技大學(xué);2008年

相關(guān)碩士學(xué)位論文 前2條

1 楊斌;寬帶圓極化與極化可重構(gòu)縫隙天線設(shè)計(jì)[D];西安電子科技大學(xué);2010年

2 陳燕仙;MEMS開關(guān)可重構(gòu)天線的研究與設(shè)計(jì)[D];華東師范大學(xué);2005年

，

本文編號(hào)：2424875