本文選題：植入式天線 + 小型化�。� 參考：《西南交通大學》2017年碩士論文

【摘要】：隨著人口老齡化問題的不斷加劇和亞健康人群的不斷增加,移動醫(yī)療技術因其在個人醫(yī)療保健中的重要應用逐漸受到人們的關注,并成為未來生物醫(yī)學的發(fā)展趨勢。植入式醫(yī)療設備工作在人體內,對病人的生理參數(shù)進行實時監(jiān)測,為疾病預防、診斷及治療提供信息。同時,它能為患者提供更舒適的治療環(huán)境和服務。植入式醫(yī)療設備與外部設備的數(shù)據(jù)傳輸是通過天線完成的。小的天線尺寸不僅能提高患者的舒適度,還能增加對人體位置的敏感度,提高通信質量,而優(yōu)良的天線性能也是植入式醫(yī)療設備進行精確數(shù)據(jù)遙測的重要前提。體內外的無線能量傳輸能延長植入式醫(yī)療設備的工作壽命,這對于植入式醫(yī)療設備長期、穩(wěn)定的工作至關重要。因此,在人們生活水平和個人健康意識不斷提高的今天,對移動醫(yī)療中植入式天線與無線能量傳輸?shù)难芯烤哂蟹浅Ｖ匾膬r值和意義,但是復雜的人體環(huán)境給植入式天線的設計帶來了新的要求與挑戰(zhàn)。本文對應用于無線醫(yī)療設備中的植入式天線以及無線能量傳輸技術進行了研究,主要工作包括:首先,采用高介電常數(shù)介質板和蜿蜒結構平面倒F天線減小天線尺寸,設計了一款緊湊的三頻段醫(yī)療植入式天線,天線尺寸為20mm × 15mm × 0.5mm,工作頻率為MICS頻段(404MHz),WMTS頻段(1.43GHz)和ISM頻段(2.45GHz)。對天線參數(shù)進行優(yōu)化后,天線在三個頻點處的阻抗帶寬分別為382-416MHz(8.4%),1.41-1.48GHz(4.9%)和 2.28-2.6GHz(13.1%),同時保持了-37.3,-25.7 和-19.1dB 的遠場增益。對設計的植入式天線,分析了不同植入情況下天線輻射性能的改變。為了進一步減小天線尺寸,采用高介電常數(shù)介質板與多層平面倒F天線相結合,設計了一款三頻段植入式天線,天線同樣覆蓋了 MICS頻段和WMTS頻段,還覆蓋了 ISM頻段(918MHz),天線結構緊湊,尺寸僅10mm× 10mm × 1.5mm。對天線性能影響較大的參數(shù)進行了優(yōu)化,最終,天線在各頻點處回波損耗小于-15dB,增益分別為-39,-33,-26dB,保證了天線工作的可靠性。同時,考慮到天線輻射帶來的人體安全問題,對天線各頻段的SAR(比吸收率)值進行了預估。最后,基于仿真模型制作了天線實物,用豬肉模擬人體組織進行了實測,實測數(shù)據(jù)與仿真結果吻合良好。為了解決醫(yī)療植入式設備中的供電問題,系統(tǒng)地研究了植入式系統(tǒng)中的無線能量傳輸技術。遠場無線能量傳輸必須考慮人體安全,首先基于所設計的植入式天線,在滿足各項安全規(guī)定的情況下,計算了 918MHz處植入式天線能接受到的功率,以此確定整流電路的輸入功率范圍,對整流電路的轉換效率進行優(yōu)化。然后,以提高轉換效率為目標,對整流電路中負載、電容和電感等進行了優(yōu)化。最終,在輸入功率為5dBm時獲得了 69.4%的轉換效率,負載上直流電壓達到3.5V,足夠提供植入式醫(yī)療設備所需的能量,使植入式醫(yī)療設備長時間、穩(wěn)定地工作。
[Abstract]:With the aggravation of population aging and the increasing of sub-health population, mobile medical technology has been paid more and more attention because of its important application in personal medical care, and has become the development trend of biomedicine in the future. Implantable medical devices work in the human body and monitor the physiological parameters of patients in real time to provide information for disease prevention, diagnosis and treatment. At the same time, it can provide patients with a more comfortable treatment environment and services. Data transmission between implantable medical devices and external devices is accomplished by antenna. Small antenna size can not only improve the comfort of patients, but also increase the sensitivity of human body position, improve the quality of communication, and excellent antenna performance is also an important prerequisite for accurate telemetry of implantable medical equipment. Wireless energy transmission in vivo and in vitro can prolong the working life of implanted medical devices, which is very important for the long-term and stable operation of implanted medical devices. Therefore, with the improvement of people's living standard and personal health awareness, the research on implanted antennas and wireless energy transmission in mobile medicine is of great value and significance. However, the complex human environment brings new requirements and challenges to the design of implanted antennas. In this paper, the implanted antenna and wireless energy transmission technology used in wireless medical equipment are studied. The main work includes: firstly, using high dielectric constant dielectric plate and meandering planar inverted F antenna to reduce the antenna size. A compact three-band medical implantable antenna is designed. The antenna size is 20mm 脳 15mm 脳 0.5mm, and the operating frequency is 404MHz (1.43GHz) and 2.45GHz. After the antenna parameters are optimized, the impedance bandwidth of the antenna at the three frequency points is 382-416MHz / 8.4mm and 1.41-1.48GHz / 4.9b) and 2.28-2.6GHz / 13.1dB respectively, while maintaining the far-field gains of -37.37-25.7 and -19.1dB respectively. The radiation performance of the implanted antenna under different implanted conditions is analyzed. In order to further reduce the antenna size, a three-band implanted antenna is designed by combining the high dielectric constant dielectric plate with the multi-layer plane inverted F antenna. The antenna also covers the mics band and the WMTS band. The structure of the antenna is compact and the size is only 10mm 脳 10mm 脳 1.5mm. Finally, the antenna echo loss is less than -15dB at each frequency point, and the gain is -39ng-33ng-26dB, which ensures the reliability of antenna operation. At the same time, considering the human safety problem caused by antenna radiation, the SAR (specific absorptivity) value of the antenna is estimated. Finally, the antenna object is made based on the simulation model, and the actual measurement is carried out by simulating human tissues with pork. The measured data agree well with the simulation results. In order to solve the problem of power supply in medical implantable devices, wireless energy transmission technology in implantable systems is studied systematically. The safety of human body must be considered in far-field wireless energy transmission. Firstly, based on the designed implanted antenna, the power of the implanted antenna at 918MHz is calculated under the condition of satisfying the security regulations. The input power range of rectifier circuit is determined and the conversion efficiency of rectifier circuit is optimized. Then, the load, capacitance and inductance of rectifier circuit are optimized to improve the conversion efficiency. Finally, when the input power is 5 dBm, the conversion efficiency is 69.4%, and the DC voltage on the load reaches 3.5 V, which is enough to provide the energy needed for the implantable medical equipment and make the implanted medical equipment work stably for a long time.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN820

【參考文獻】

相關期刊論文 前5條

1 吳昊;郁磊;郭立泉;王計平;方強;;一種新型MICS頻段可植入天線的設計[J];電子元件與材料;2014年03期

2 黃標;顏國正;昝鵬;李倩如;;遙測膠囊微帶天線的設計[J];上海交通大學學報;2007年11期

3 張占龍,何為;埋藏式深部腦刺激器(DBS)的設計與應用[J];重慶工商大學學報(自然科學版);2005年05期

4 謝翔,張春,王志華;生物醫(yī)學中的植入式電子系統(tǒng)的現(xiàn)狀與發(fā)展[J];電子學報;2004年03期

5 薛睿峰,鐘順時;微帶天線圓極化技術概述與進展[J];電波科學學報;2002年04期

相關博士學位論文 前1條

1 劉昌榮;植入式天線在生物醫(yī)療中的應用研究[D];電子科技大學;2015年

相關碩士學位論文 前4條

1 吳澤濤;用于移動醫(yī)療的植入式人體天線研究[D];華南理工大學;2016年

2 顏青;植入式醫(yī)療設備無線能量傳輸系統(tǒng)電磁環(huán)境下的人體安全性研究[D];中國海洋大學;2014年

3 王麗婧;Li_2MgTi_3O_8微波介質陶瓷的低溫燒結及介電性能研究[D];天津大學;2012年

4 李旦;面向無線能量傳輸?shù)纳漕l信號在生物體內傳播規(guī)律的實驗研究[D];北京大學;2008年

，

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