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In this paper we introduce a bottom-up microwave and millimeter wave modeling strategy for membrane bound biological systems. The approach is based on the stepwise integration of bulk liquid and membrane dielectric spectroscopy data into 3D biophysical models that are amenable to efficient electromagnetic computation. The purpose of this modeling effort is to develop more understanding of microwave...
This paper presents a reflection-type 90 GHz substrate integrated cavity resonator sensor realized in LTCC technology for lab-on-chip microfluidic applications. A linear relationship between the resonance frequency of the sensor and the permittivity of the material under test was observed from measurements on low-loss materials. Calibration curves are also obtained for water-isopropanol mixtures which...
We present in this paper an inexpensive sensor realized on printed circuit board for broadband dielectric characterization of both liquids and solids. It is based on a CPW-CPW transition and statistical calibration. The specific property of the approach is that no assumption regarding cascading transmission lines with different properties has to be made as permittivity is obtained by a single-tier...
This paper presents a 60 GHz liquid sensing cavity resonator realized in LTCC technology for liquid sensing applications, such as in lab-on-chip microfluidics. The LTCC cavity senses the liquid through means of an opening in the cavity's bottom metal layer. Different liquids underneath the cavity result in different resonant frequencies and coupling levels of the cavity. Measurements were performed...
In this paper we describe the dielectric characterization up to 110 GHz of various liquids and biological tissues using an on-wafer technique. The materials are placed in a PDMS container and placed on top of a CPW line fabricated on LTCC. The method uses a multi-step method to extract the propagation constant of the CPW line covered by material under test (MUT), which is then used to extract the...
This paper presents work on a CPW liquid sensor realized in LTCC technology. Challenges of using the sensor at millimeter wave frequencies are discussed. A solution is proposed to obtain measurements with higher accuracy. Measurements of water-methanol mixtures agree well with theoretical models up to 110 GHz, showing the sensor's potential of cell-solution sensing at millimeter wave frequencies.
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