Question

帮忙翻译一篇论文摘要【翻译的好可以追加悬赏】 时间是今晚之前

目前天线在医疗器械中应用越来越广泛，随着社会对医疗设备的要求不断提高，天线的设计变的很重要。本课题基于医学仪器的微型化和高性能的要求，研究微带天线尺寸和相对介电常数对输入阻抗、S11参数以及驻波比的影响情况，分析微带贴片天线性能的参数，选择性能最优的参数组，使无线诊疗设备在实现接收和发射电磁波信号的过程中做到信号的收发更准确，耗能更少，体积更小，设备更安全稳定，进而提高信息传输的速度和效率。
首先，本文对生物医学测控技术的发展做了比较详细的叙述，阐述了无线技术在医学领域发挥的重要作用。同时，对微带天线的基本理论做了详细的介绍。通过对微带贴片天线的主要特性参数的研究，微带贴片天线具有微带天线具有剖面低、体积小、重量轻、易于加工、非常有利于集成等优点。
其次，本文详细介绍了FDTD算法的发展应用和所具备的优势，熟悉XFDTD7.0仿真软件的基本操作，基于小尺寸、高性能的设计思想，重点仿真介质板厚度和介质板材料对微带贴片天线的影响。当介质板的相对介电常数变化时，即取值ε=2.2、ε=4.4、ε=9.8，仿真得中心频率越来越小，输入阻抗在ε=9.8明显增大，回波损耗不断增大，这些说明放射波在增加，输入阻抗和馈线特性阻抗的匹配程度在降低，仿真结果与理论得到很好的吻合；当介质板厚度发生变化时，即取值h=0.794mm、h=1.2mm、h=2.0mm,仿真得天线的频带宽度在增加，在h=1.2时天线的输入阻抗实部接近50 ohm，虚部接近于0 ohm回波损耗达到最小,这些说明在h=1.2时，不仅频带宽度得到增加而且阻抗匹配也达到最优。
通过以上分析和比较，为微带天线设计时的参数选择提供了有力的仿真基础。

【关键词】微带贴片天线 输入阻抗 小尺寸 参数 驻波比

Answer 1

At present in the medical devices antenna used more widely, along with the social development of medical equipment requirement enhances unceasingly, the antenna design has become very important. Based on this topic of medical instrument and nano-scale and performance requirements research microstrip antennas for size and relative dielectric constant input impedance, S11 parameters and VSWR at influence situation, analyses the parameters of the microstrip antenna performance patch, choose optimal performance parameters, make wireless medical equipment group received and transmitted in the realization process of electromagnetic signals to receive more accurate it signals, needs less energy, equipment, smaller, so as to improve the safety and stability of the more information transmission speed and efficiency.
First, in this paper the development of biomedical measurement and control technology compares detailed narration, this paper expounds the wireless technology in the field of medicine play an important role. Meanwhile, the basic theory of microstrip antennas are described in detail. Based on the main patch antennas are microstrip, characteristic parameters of microstrip patch antennas are microstrip antenna has profile with low, small volume, light weight, easy processing, very beneficial to integration, etc.
Secondly, the article introduces the development and application of FDTD algorithm and the advantages, familiar with XFDTD7.0 simulation software based on the basic operation, small size, high performance design ideas, key simulation medium plate thickness and medium plate materials about microstrip patch antennas are influence. When medium plate when the relative dielectric constant change, namely the search-evade antagonistic = 2.2, value the search-evade antagonistic = 4.4, search-evade antagonistic = 9.8, simulation must center frequency more and more small, input impedance search-evade antagonistic = 9.8 in increased obviously, return loss is continuously increasing, and these instructions in the increase, radiation wave characteristic impedance input impedance and feeder in reducing the matching degree, and the simulation result with the theoretical to obtain the very good ones; When medium plate thickness changes, namely 0.794 mm, value h = h = 1.2 mm, h = 2.0 mm, simulation in the band width to antenna in h = 1.2 increases, when the input impedance of the antenna real part of nearly 50 ohm, imaginary part close to 0 ohm return loss minimum, these directions in h = 1.2, not only band width be increased and impedance matching also to achieve optimal.
Through the above analysis and comparison for microstrip antennas, the choice of parameters design provides a strong simulation basis.
【 keywords 】 microstrip patch antennas are small size parameters input impedance than standing wave