Loss Measurement of Aluminum Thin-Film Coplanar Waveguide (CPW) Lines at Microwave Frequencies

Ramazani, Maliheh; Miladi, H.; Shahabadi, Mahmoud; Mohajerzadeh, S.

doi:10.1109/ted.2010.2050110

Cited by 5 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reason behind the observed non-monotonic behavior might be found in the details of the meander structure, but a thorough understanding might require additional studies. Similar observations have been reported previously on aluminum CPW resonators of much larger dimensions and at room temperature [30]. Figure 3 displays the quality factor values for the modes 2 and 3 of all the resonators.…”

Section: Resultssupporting

confidence: 85%

Metallic coplanar resonators optimized for low-temperature measurements

Rahim¹,

Lehleiter²,

Bothner³

et al. 2016

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Metallic coplanar microwave resonators are widely employed at room temperature, but their low-temperature performance has received little attention so far. We characterize compact copper coplanar resonators with multiple modes from 2.5 to 20 GHz at temperatures as low as 5 K. We investigate the influence of center conductor width (20 to 100 µm) and coupling gap size (10 to 50 µm), and we observe a strong increase of quality factor (Q) for wider center conductors, reaching values up to 470. The magnetic-field dependence of the resonators is weak, with a maximum change in Q of 3.5% for an applied field of 7 T. This makes these metallic resonators well suitable for magnetic resonance studies, as we document with electron spin resonance (ESR) measurements at multiple resonance frequencies.

show abstract

Section: Resultssupporting

confidence: 85%

Metallic coplanar resonators optimized for low-temperature measurements

Rahim¹,

Lehleiter²,

Bothner³

et al. 2016

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Agilent’s Advanced Design System (ADS) [29] was used to simulate these equivalent circuit models. The internal optimization engine in ADS was used to extract parameter values by matching simulated performance to measurement values [30]. The dielectric constant and loss tangent of the substrate in the model were optimized within ADS to achieve a good agreement between the measured S-parameters and those predicted by the equivalent circuits over the frequency range of interest.…”

Section: Methods Of Dielectric Characterizationmentioning

confidence: 99%

Dielectric Characterization of PCL-Based Thermoplastic Materials for Microwave Diagnostic and Therapeutic Applications

Aguilar

Shea

Al-Joumayly³

et al. 2012

IEEE Trans. Biomed. Eng.

View full text Add to dashboard Cite

We propose the use of a polycaprolactone (PCL)-based thermoplastic mesh as a tissue-immobilization interface for microwave imaging and microwave hyperthermia treatment. An investigation of the dielectric properties of two PCL-based thermoplastic materials in the frequency range of 0.5 – 3.5 GHz is presented. The frequency-dependent dielectric constant and effective conductivity of the PCL-based thermoplastics are characterized using measurements of microstrip transmission lines fabricated on substrates comprised of the thermoplastic meshes. We also examine the impact of the presence of a PCL-based thermoplastic mesh on microwave breast imaging. We use a numerical test bed comprised of a previously reported three-dimensional anatomically realistic breast phantom and a multi-frequency microwave inverse scattering algorithm. We demonstrate that the PCL-based thermoplastic material and the assumed biocompatible medium of vegetable oil are sufficiently well matched such that the PCL layer may be neglected by the imaging solution without sacrificing imaging quality. Our results suggest that PCL-based thermoplastics are promising materials as tissue immobilization structures for microwave diagnostic and therapeutic applications.

show abstract

“…3. ADS simulations were performed to identify the equivalent circuit parameters that fit experimentally measured values (Ramazani et al 2010;Aguilar et al 2012). The dielectric constant and loss tangent of the substrate material were extracted after simulations had reached a qualified coincidence (Current error function (EF): *5 in ADS) between the experimental and simulated S-parameters.…”

Section: Transmission Line Methods Characterizationsmentioning

confidence: 99%

Characterizations of biodegradable epoxy-coated cellulose nanofibrils (CNF) thin film for flexible microwave applications

Liu

Chang

et al. 2016

Cellulose

View full text Add to dashboard Cite

Wood pulp cellulose nanofibrils (CNF) thin film is a novel recyclable and biodegradable material. We investigated the microwave dielectric properties of the epoxy coated-CNF thin film for potential broad applications in flexible high speed electronics. The characterizations of dielectric properties were carried out in a frequency range of 1-10 GHz. The dielectric constant and loss tangent were extracted by using measurements of microstrip transmission lines that were built on the epoxy coated-CNF film and combined with Agilent Advanced Design System simulations. The RF property for the epoxy coated-CNF was compared to that of commercial polyethylene terephthalate film (PET). With the comparable microwave properties of non-biodegradable PET film, our study suggests that the epoxy coated-CNF film is a suitable biodegradable and environment-friendly substrate for flexible microwave and other applications.

show abstract

Loss Measurement of Aluminum Thin-Film Coplanar Waveguide (CPW) Lines at Microwave Frequencies

Cited by 5 publications

References 9 publications

Metallic coplanar resonators optimized for low-temperature measurements

Metallic coplanar resonators optimized for low-temperature measurements

Dielectric Characterization of PCL-Based Thermoplastic Materials for Microwave Diagnostic and Therapeutic Applications

Characterizations of biodegradable epoxy-coated cellulose nanofibrils (CNF) thin film for flexible microwave applications

Contact Info

Product

Resources

About