Low-cost compact spiral inductor resonator filters for system-in-a-package

Lee, Gye-An; Megahed, M.; Flaviis, F. De

doi:10.1109/tadvp.2005.850504

Cited by 17 publications

(2 citation statements)

References 22 publications

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“…In the literature, several works have been carried out to characterize the analytical model of passive SRs [26], [27], [28], [29], [30]. Conventionally, the equivalent circuit of a planar SR can be modeled as an RLC series resonator, and these lumped parameters could be accurately determined following the extraction procedure described in [28].…”

Section: Analytical Modelmentioning

confidence: 99%

Millimetric Inclusion Detection Through a Contactless Microwave Spiral Sensor for Biomedical Applications

2023

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This article introduces the design and fabrication of a microwave contactless sensor used to detect the presence of millimetric inclusions in a biological medium for biomedical applications. The hardware system comprises a self-resonant planar spiral resonator (SR) (sensing element) inductively coupled to an external concentric single-loop probe (reading probe), working at 648 MHz. The microwave sensor configuration relies on the Q-factor maximization of the spiral coil, that is, the sensing element, through an optimization process, to obtain a stronger sensitivity and, thus, a millimeter resolution for the inclusions' detection. The detection is achieved by recording both the amplitude variation and the frequency shift of the input impedance of the reading probe. To validate the proposed solution, full-wave simulations have been performed to design and preliminary evaluate the radiating system performance in detecting millimetric biological inclusions. As an applicative example, we focus on air bubbles detection in hemodialysis procedures; in particular, we carried out the experimental verification by employing an agar phantom to replicate the dielectric characteristics of the blood tissue and polylactic acid (PLA) samples of various sizes to represent the air inclusions. We proved that the theoretical assumptions were in excellent agreement with both the numerical and experimental results, encouraging further analysis of the potential use of such sensors in biomedical applications. Indeed, the radiating device can be very helpful for all operations where it is necessary to detect the presence of undesired and dangerous contaminants in a contactless way, making the procedure safer for patients.

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Section: Analytical Modelmentioning

confidence: 99%

Millimetric Inclusion Detection Through a Contactless Microwave Spiral Sensor for Biomedical Applications

2023

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“…High-quality on-chip inductors are vital in the implementation of transceivers aimed for wireless communication systems (Hung-Wei et al , 2005; Lin et al , 2007; Gye-An et al , 2005). The performance measures in designing an inductor are optimal inductance (L), higher quality factor (Q) and self-resonance frequency ( f SR ) for the miniaturized on-chip area.…”

Section: Introductionmentioning

confidence: 99%

High-quality factor multipath differential fractal inductor for wireless applications

Tumma

Nistala

2021

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Purpose The purpose of this study is to develop a high-quality factor fractal inductor for wireless applications such as satellite, WLAN, Bluetooth, microwave, radar and cellular phone. Design/methodology/approach The Hilbert fractal curve is used in the implementation of the proposed inductor. In the proposed inductor, the metal width has split into multiple paths based on the skin depth of the metal. The simulations of the proposed inductor are performed in 180 nm CMOS technology using the Advanced Design System EM simulator. Findings The multipath technique reduces the skin effects and proximity effects, which, in turn, decreases the series resistance of the inductor and attains high-quality factor over conventional fractal inductor for the equal on-chip area. Research limitations/implications The width of the path has chosen higher than the skin depth of the metal for a required operating frequency. Due to cost constraints, the manufacturing of the proposed fractal inductor is limited to a single layer. Practical implications The proposed inductor will be useful for the implementation of critical building blocks of radio frequency integrated circuits and monolithic microwave integrated circuits such as low-noise amplifiers, voltage-controlled oscillators, mixers, filters and power amplifiers. Originality/value This paper presents for the first time the use of a multipath technique for the fractal inductors to enhance the quality factor.

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Miniaturized bandpass filter design using LC resonators on an organic substrate

Huang

Chen

Chiu

et al. 2010

Micro & Optical Tech Letters

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Synthesis and design of compact microwave filters with direct source-load coupling, J Electromagn Waves ABSTRACT: This letter presents very small LC resonator-based bandpass filters on an organic substrate for wireless system applications. Because of the lack of a fabrication process for highcapacitance density capacitors on the applicable substrate, the proposed bandpass filter designs are based on either modified-T or coupledresonator prototype. By carefully taking parasitic and coupling effects into account in the filter synthesis procedure, the presented bandpass filter designs can feature themselves with a Chebyshev response plus multiple transmission zeros, resulting in a low-insertion loss in the passband as well as a high-attenuation rate in the roll-off region. Comparison between EM simulation and measurement results shows excellent agreement.

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Low-cost compact spiral inductor resonator filters for system-in-a-package

Cited by 17 publications

References 22 publications

Millimetric Inclusion Detection Through a Contactless Microwave Spiral Sensor for Biomedical Applications

Millimetric Inclusion Detection Through a Contactless Microwave Spiral Sensor for Biomedical Applications

High-quality factor multipath differential fractal inductor for wireless applications

Miniaturized bandpass filter design using LC resonators on an organic substrate

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