【摘要】：隨著3G乃至4G技術(shù)的發(fā)展,智能手機(jī)獲得了越來越多消費(fèi)者的青睞并且逐漸取代了功能手機(jī)。但是,智能手機(jī)時代的到來必然會給天線設(shè)計者帶來一個嚴(yán)峻的問題-手機(jī)天線的設(shè)計難題。為了解決這一難題,在總結(jié)前人天線設(shè)計方案設(shè)計的基礎(chǔ)上,四種可以適用于窄邊框手機(jī)并且能夠覆蓋LTE/WWAN(LTE700/2300/2500,GSM850/900/1800/1900/UMTS2100)的多個頻段的可重構(gòu)天線設(shè)計方案被提了出來。首先,本論文提出了一種能夠在在環(huán)天線和單極子天線之間切換自由切換的諧振結(jié)構(gòu)可重構(gòu)天線方案,該天線結(jié)構(gòu)簡單并且具有寬度為7mm的窄邊框結(jié)構(gòu)。本方案中的天線不僅能夠具有窄邊框天線的結(jié)構(gòu)特性,而且能夠同時擁有單極子天線和環(huán)天線的共同性能優(yōu)勢。通過控制電路控制環(huán)天線短路點(diǎn)的開斷能夠?qū)⑻炀�的結(jié)構(gòu)在環(huán)天線和單極子天線之間切換。最終設(shè)計出來的天線能夠覆蓋LTE/WWAN(GSM850/900/1800/1900/UMTS2100/LTE2300/2500)七個頻段。其次,本論文提出了一種具有窄邊框特性的諧振長度可重構(gòu)天線方案。不同于諧振結(jié)構(gòu)可重構(gòu)天線設(shè)計方案,這種可重構(gòu)天線是將天線的諧振長度進(jìn)行可重構(gòu)的。通過控制兩個二極管的導(dǎo)通與否來控制天線的諧振長度。最終設(shè)計出來的天線能夠覆蓋LTE/WWAN(GSM850/900/1800/1900/UMTS2100/LTE2300/2500)七個頻段。再次,本文提出了一種具有雙天線結(jié)構(gòu)的可重構(gòu)天線方案,該方案解決系統(tǒng)延長地板對天線性能影響這一問題。本方案中的天線由兩個分別能覆蓋低頻段(GSM850/900)和高頻段(GSM1800/1900/UMTS2100/LTE2300/2500)的主天線構(gòu)成,通過改變控制電路的工作狀態(tài)便可以控制兩個天線的工作與否。最終綜合起來的帶寬能夠覆蓋GSM850/900/1800/1900/UMTS2100/LTE 2300/2500七個頻段。最后,本文提出了一種匹配電路可重構(gòu)天線方案。該天線具有兩組用于調(diào)節(jié)調(diào)節(jié)天線低頻段阻抗特性的匹配電路,通過控制電路便可以控制兩組匹配電路的通斷。采用這種匹配電路可重構(gòu)技術(shù)的天線的優(yōu)勢在于能夠設(shè)計出具有多頻帶特性的手機(jī)天線。最終設(shè)計出來的天線能夠覆蓋LTE/WWAN(LTE700/2300/2500,GSM850/900/1800/1900/UMTS2100)八個頻段。
[Abstract]:With the development of 3G and 4G technology, more and more consumers favor smartphones and gradually replace functional phones. However, the advent of the smart phone era will inevitably bring a serious problem to antenna designers-the design of mobile phone antennas. In order to solve this problem, four reconfigurable antenna designs which can be applied to narrow border mobile phones and can cover LTE/WWAN (LTE700 / 2300 / 2500N GSM 850 / 900 / 1900 / 1900 / UMTS2100) have been proposed on the basis of summarizing the previous antenna design schemes. Firstly, this paper proposes a resonant reconfigurable antenna scheme which can switch freely between the loop antenna and the monopole antenna. The antenna is simple in structure and has a narrow frame structure with a width of 7mm. The antenna in this scheme not only has the structural characteristics of narrow border antenna, but also has the common performance advantages of monopole antenna and loop antenna. The structure of the loop antenna can be switched between the loop antenna and the monopole antenna by controlling the short circuit of the loop antenna. The designed antenna can cover seven bands of LTE/WWAN (GSM850/900/1800/1900/UMTS2100/LTE2300/2500). Secondly, a resonant length reconfigurable antenna scheme with narrow frame characteristics is proposed. Different from the design scheme of the resonant reconfigurable antenna, this reconfigurable antenna reconstructs the resonant length of the antenna. The resonant length of the antenna is controlled by controlling the conduction of the two diodes. The designed antenna can cover seven bands of LTE/WWAN (GSM850/900/1800/1900/UMTS2100/LTE2300/2500). Thirdly, a reconfigurable antenna scheme with dual antenna structure is proposed, which solves the problem that the extended floor of the system affects the antenna performance. The antenna in this scheme is composed of two main antennas which can cover the low frequency band (GSM850/900) and the high frequency band (GSM1800/1900/UMTS2100/LTE2300/2500) respectively. The operation of the two antennas can be controlled by changing the working state of the control circuit. The combined bandwidth will eventually cover seven bands of GSM850/900/1800/1900/UMTS2100/LTE 2300 / 2, 500. Finally, a reconfigurable antenna scheme for matching circuits is proposed. The antenna has two sets of matching circuits used to adjust the impedance characteristics of the antenna in low frequency band. The on-off of the two matching circuits can be controlled by the control circuit. The advantage of this reconfigurable matching circuit antenna is that it can design a mobile phone antenna with multi-band characteristics. The resulting antenna can cover eight bands of LTE/WWAN (LTE 700 / 2300 / 2500 GSM 850 / 900 / 1800 / 1900 / UMTS2100).
【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】：TN828.6

【共引文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前3條

1 周林亞;移動終端天線及MIMO多天線研究[D];西安電子科技大學(xué);2013年

2 楊濤;小型化寬頻段天線的研究[D];杭州電子科技大學(xué);2014年

3 孫長文;應(yīng)用于移動終端的多頻LTE天線設(shè)計[D];安徽大學(xué);2015年

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本文編號：2169463