Equipment for measurement of complex permittivity

复介电常数测量设备

• 批准号: 360257-2008
• 负责人: Abhari, Ramesh
• 金额: $ 6.95万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=361842
• 关键词: Equipment; measurement; complex; permittivity

Derivation of complex permittivity is important to many electrical and biomedical engineering applications. In electronic engineering, new fabrication processes and system integration techniques are introduced that often utilize thin substrates or semiconductor carriers. To characterize the interconnects and substrates used in these emerging compact systems, propagation constant and effective complex permittivity should be extracted. The experimental methods that are employed for this purpose must provide accurate characterization of the low frequency region that is often missed in wide band measurements using vector network analyzers. Therefore, especial impedance measurement instruments are needed to cover the low frequency region. The RF impedance and material analyzer requested in this application has such capability and yields the complex permittivity and permeability profiles. In fact, derivation of complex permittivity has found application in biomedical engineering and emerges as the innovative method of non-invasive cell growth monitoring. One of the most challenging fields of regenerative medicine is the treatment of insulin-dependent diabetes mellitus. Implementation of tissue engineering principles allows for islet regeneration in situ and islet neogenesis in vitro. A method based on complex permittivity measurement can be employed for monitoring cell behavior in situ which is of critical importance in implementing in vitro culturing of the islets.Additionally, the information about complex substrate characteristics is crucial in predicting and evaluating the performance of microwave circuits, and in particular, those that are designed based on slow-wave propagation, electromagnetic bandgap and metamaterial concepts. Short pulse transmission measurements provide wideband characterization of these circuits. The low frequency complex permittivity is used in interpolation of the data obtained from short pulse technique to extract loss tangent in a wide frequency range starting from DC to tens of GHz. The set of equipment requested in this grant application will be used for inspection of cross-disciplinary material characterization problems.

复介电常数的推导对于许多电气和生物医学工程应用是重要的。在电子工程中，新的制造工艺和系统集成技术被引入，通常使用薄衬底或半导体载体。为了表征这些新兴的紧凑系统中使用的互连和基板，传播常数和有效的复介电常数应提取。为此目的所采用的实验方法必须提供低频区域的准确表征，这在使用矢量网络分析仪的宽带测量中经常被遗漏。因此，需要专门的阻抗测量仪器来覆盖低频区域。本申请中要求的RF阻抗和材料分析仪具有这种能力，并产生复介电常数和磁导率分布。事实上，复介电常数的推导已经在生物医学工程中得到应用，并作为非侵入性细胞生长监测的创新方法而出现。再生医学最具挑战性的领域之一是胰岛素依赖型糖尿病的治疗。组织工程原理的实施允许原位胰岛再生和体外胰岛新生。基于复介电常数测量的方法可用于原位监测细胞行为，这对于实现胰岛体外培养至关重要。此外，关于复杂基底特性的信息对于预测和评估微波电路的性能至关重要，特别是那些基于慢波传播、电磁带隙和超材料概念设计的微波电路。短脉冲传输测量提供了这些电路的宽带特性。低频复介电常数被用于从短脉冲技术获得的数据的插值中，以提取从DC到几十GHz的宽频率范围内的损耗角正切。本补助金申请中要求的一套设备将用于检查跨学科的材料表征问题。