Characterization of microstrip lines near a substrate edge and design formulas of edge-compensated microstrip lines (MMICs)

Yamashita, E.; Ohashi, Hideyuki; Atsuki, K.

doi:10.1109/22.17456

Cited by 21 publications

(5 citation statements)

References 5 publications

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“…In the low-frequency limit, i.e. 0.1 GHz, the data obtained by the proposed method are in excellent agreement with those reported by Yamashita et al using a quasi-TEM approach [32].…”

Section: B Microstrip Proximity Effectssupporting

confidence: 89%

A full-wave mixed potential mode-matching method for the analysis of planar or quasi-planar transmission lines

Tzuang

Tseng

1991

IEEE Trans. Microwave Theory Techn.

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A newly proposed and tested full-wave mixed potential mode-matching method is presented for the analysis of planar and/or quasi-planar transmission lines. The transmission lines under investigation consist of layered (stratified) and nonlayered dielectric substrates and metal strips of finite thickness. The y-directed hybrid TE and TM Hertzian potentials, perpendicular to the interfaces between each layered region, are employed in the layered regions. The nonlayered regions, which consist of dielectric step discontinuities that destroy the layered configuration in the horizontal plane, utilize the x -directed hybrid TE and TM Hertzian potentials parallel to the horizontal plane. As a direct result, the full-wave formulation of the transmission line problem becomes systematic and easy to handle. Extensive analyses of a particular case study show that the relative convergence criterion needs to be satisfied to obtain accurate electromagnetic field solutions. The theoretical results obtained here are in very good agreement with the published data for various transmission line structures, which are the special limiting cases of the particular case study. The applications of the new formulation to the proximity effects of microstrip and Microslab' lines are also illustrated by examples. Fig. 1. A generalized planar and/or quasi-planar transmission lines structure for microwave, millimeter-wave, and optoelectronic applica-

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“…In the low-frequency limit, i.e. 0.1 GHz, the data obtained by the proposed method are in excellent agreement with those reported by Yamashita et al using a quasi-TEM approach [32].…”

Section: B Microstrip Proximity Effectssupporting

confidence: 89%

A full-wave mixed potential mode-matching method for the analysis of planar or quasi-planar transmission lines

Tzuang

Tseng

1991

IEEE Trans. Microwave Theory Techn.

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“…Typical values for parasitic impedances of such short wires at microwave frequencies have been reported in [31]–[32]. Estimates for the fringing capacitance of a microstrip line located at the edge of a dielectric substrate are also reported in [33]. From these studies, we obtained initial approximate values for the parasitic R , L , and C elements used in the circuit model.…”

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.

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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.

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“…The estimated values for induced parasitic impedances for the air gaps and defection in the edge-mounted connector at microwave frequency ranges have been studied before (Lee 1995;Yun and Lee 1995). Previous studies also suggested an estimate of fringing capacitance at the end of the dielectric substrate (Yamashita et al 1989). Guided by these previous studies, reasonable initial values of the parasitic L, C, and R elements were first set in the circuit.…”

Section: Transmission Line Methods Characterizationsmentioning

confidence: 95%

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

Liu

Chang

et al. 2016

Cellulose

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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.

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Characterization of microstrip lines near a substrate edge and design formulas of edge-compensated microstrip lines (MMICs)

Cited by 21 publications

References 5 publications

A full-wave mixed potential mode-matching method for the analysis of planar or quasi-planar transmission lines

A full-wave mixed potential mode-matching method for the analysis of planar or quasi-planar transmission lines

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

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