本文選題：上網(wǎng)卡　切入點(diǎn)：筆記本　出處：《北京郵電大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：現(xiàn)今,隨著移動通信技術(shù)的發(fā)展,移動通信終端已經(jīng)不再局限于手機(jī),而是包括了上網(wǎng)卡、MIFI上網(wǎng)本、攝像機(jī)等嵌入了SIM卡或USIM卡模塊的設(shè)備,呈現(xiàn)出了多樣化趨勢。3G上網(wǎng)卡作為一種在3G時(shí)代新興的上網(wǎng)終端設(shè)備,得到了廣泛的應(yīng)用。上網(wǎng)卡內(nèi)置了通信模塊及天線,能夠協(xié)助筆記本在3G信號覆蓋的地方,通過3G網(wǎng)絡(luò),利用SIM卡連接到互聯(lián)網(wǎng)。而為了保證通信質(zhì)量,需要準(zhǔn)確評估3G上網(wǎng)卡的天線性能。OTA(Over The Air)測試技術(shù)是一種評估天線輻射性能和接收性能的有效測試方法。雖然目前國內(nèi)還沒有強(qiáng)制性的OTA測試標(biāo)準(zhǔn),但各個(gè)廠商和相關(guān)國際組織(如CTIA、PTCRB. 3GPP、COST273)對此問題進(jìn)行了大量測試和研究。同SAR (Specific Absoration Rate)值測試標(biāo)準(zhǔn)一樣,OTA測試最終將成為強(qiáng)制標(biāo)準(zhǔn)來執(zhí)行。與手機(jī)終端不同的是,上網(wǎng)卡的通常使用狀態(tài)為與筆記本USB端口連接,筆記本會對上網(wǎng)卡的OTA性能產(chǎn)生一定影響；人頭離天線距離較遠(yuǎn),而人手位于天線近場區(qū),人手會對上網(wǎng)卡的OTA性能也會有影響。因此本論文的一個(gè)研究重點(diǎn)便是通過理論分析、數(shù)值仿真及具體試驗(yàn)分析不同筆記本、人手模型對上網(wǎng)卡OTA性能的影響大小差異,得出量化的分析結(jié)果,最終向3GPP標(biāo)準(zhǔn)組織提交合理的上網(wǎng)卡OTA測試方法提案。 除了能夠通過OTA測試確定天線的遠(yuǎn)場性能,還需要用SAR參數(shù)確定天線的近場性能。但是SAR值與OTA參數(shù)中的TRP值(Total Ration Power)是矛盾的。一般降低發(fā)射功率,會使SAR值降低,但是天線的輻射性能會變差,也就使TRP值變低。為解決這個(gè)問題,需要對降低SAR值的方案進(jìn)行進(jìn)一步研究,本論文運(yùn)用電磁場仿真軟件進(jìn)行終端天線的SAR值仿真,并與OTA仿真結(jié)果進(jìn)行比對,綜合評價(jià)終端天線性能,做出理論分析和說明,具體提出降低SAR值的方法。
[Abstract]:Nowadays, with the development of mobile communication technology, mobile communication terminals are no longer confined to mobile phones, but include devices embedded with SIM card or USIM card module, such as network card, mifi netbook, camera, etc. The 3G network card has been widely used as a new type of Internet terminal equipment in the 3G era. The network card has built-in communication module and antenna, which can assist the notebook in the 3G signal coverage place, through the 3G network. Connect to the Internet using SIM cards. And to ensure the quality of communication, It is necessary to accurately evaluate the antenna performance of 3G network card. OTA over The Air. is an effective test method to evaluate antenna radiation performance and receiving performance, although there is no mandatory OTA test standard in China at present. However, various manufacturers and relevant international organizations (such as CTIAA / PTCRB.3 GPP / COST273) have carried out a lot of tests and studies on this issue. Like the SAR specific Absoration value testing standard, OTA testing will eventually become a mandatory standard to be implemented. The use of the card is usually connected to the USB port of the notebook, which will have a certain impact on the OTA performance of the card, and the human head is far from the antenna, while the human hand is located in the near field of the antenna. Therefore, one of the key points of this paper is to analyze the influence of the manual model on the OTA performance of the network card through theoretical analysis, numerical simulation and concrete experiments. Get the quantitative analysis result, and finally submit the reasonable OTA test method proposal to the 3GPP standard organization. In addition to being able to determine the far-field performance of the antenna by OTA test, it is necessary to determine the near-field performance of the antenna by using the SAR parameter. However, the SAR value is inconsistent with the TRP value in the OTA parameter Total Ration power. However, the radiation performance of the antenna will become worse, which will make the TRP value lower. In order to solve this problem, we need to further study the scheme of reducing the SAR value. In this paper, we use the electromagnetic field simulation software to simulate the SAR value of the terminal antenna. Compared with the simulation results of OTA, the performance of the terminal antenna is evaluated synthetically, the theoretical analysis and explanation are made, and the method of reducing the SAR value is put forward in detail.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TN929.5;R318.0

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王麗娟;;無線產(chǎn)品OTA空間射頻性能測試方法改進(jìn)[J];安全與電磁兼容;2008年03期

2 古映瑩;邱小勇;胡啟明;劉雪穎;;電磁屏蔽材料的研究進(jìn)展[J];材料導(dǎo)報(bào);2005年02期

3 張志偉;李玉山;;電磁帶隙結(jié)構(gòu)在同步開關(guān)噪聲抑制中的應(yīng)用分析[J];電訊技術(shù);2010年03期

4 劉征;李青風(fēng);李勇;;基于三維測量系統(tǒng)的手機(jī)天線性能測試[J];電子科技;2009年06期

5 周紅梅;蘇鎮(zhèn)濤;胡向軍;謝向東;曲德成;楊國山;;微波暴露人體比吸收率(SAR)的分布研究[J];輻射防護(hù);2009年03期

6 鄭秋容;陳夏萌;付云起;袁乃昌;;電磁帶隙結(jié)構(gòu)單脊波導(dǎo)縫隙相控陣天線的實(shí)驗(yàn)研究[J];國防科技大學(xué)學(xué)報(bào);2007年02期

7 庾志成;;全球3G發(fā)展現(xiàn)狀及趨勢分析[J];現(xiàn)代電信科技;2009年01期

8 霍海波;;淺談生活中的電磁污染及防護(hù)[J];現(xiàn)代物理知識;2009年03期

9 張學(xué)軍;張孝林;;多模移動終端芯片設(shè)計(jì)技術(shù)及多模終端發(fā)展現(xiàn)狀[J];移動通信;2006年08期

10 商鈞;;3G手機(jī)電磁兼容抗擾度測試[J];中國無線電;2011年09期

相關(guān)碩士學(xué)位論文 前3條

1 左春偉;移動臺OTA自動測試系統(tǒng)的研究和實(shí)現(xiàn)[D];北京郵電大學(xué);2008年

2 楊麗;手機(jī)輻射對人體器官影響的動態(tài)仿真研究[D];河北工業(yè)大學(xué);2007年

3 曹紅方;手機(jī)天線的一體化設(shè)計(jì)[D];蘇州大學(xué);2009年

，

本文編號：1650833