Optimization of Properties of Planar Spiral Inductors

Vaněk, Jiřı́; Szendiuch, Ivan; Hladik, J.

doi:10.1109/isse.2007.4432854

Cited by 7 publications

(7 citation statements)

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“…Also, air core inductors are not limited by current saturation or by a Curie temperature limit, therefore offering much better linearity over wide operation range compared to their cored counterparts. Moreover, modern fabrication techniques [e.g., PCB [22][23][24][25][26][27][28][29], 3D printing [30], etc.] can be leveraged to reduce weight and cost without sacrificing performance.…”

Section: Switched Mode Dc-rf Power Inverter With Pcb Inductorsmentioning

confidence: 99%

“…Specifically, the PCB air core inductors presented here are toroidal in shape. Compared to more common air core spiral and solenoid shape inductors [23,24,[31][32][33][34], toroids have the advantage of confining majority of the magnetic flux within the torus. This leads to reduced electromagnetic interference (EMI) with other components especially in a compact system.…”

Section: Switched Mode Dc-rf Power Inverter With Pcb Inductorsmentioning

confidence: 99%

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An Integrated RF Power Delivery and Plasma Micro-Thruster System for Nano-Satellites

et al. 2018

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Progress in satellite technologies is ongoing and eventually finds applications back on Earth. Electric propulsion systems have been proven effective on large scale satellites (NASA DAWN) with better propellant efficiency than chemical or cold gas propulsion, and if miniaturized can be promising for long term operation of nano-satellites (e.g., CubeSats) in low Earth orbit or in deep space (NASA MarCO). However, the power supplies often used to power these electric thrusters, particularly those involving radiofrequency (RF) plasma, typically comprise power inefficient linear mode RF power amplifiers (e.g., class AB). These are simple systems designed to operate reliably under a wide range of loads for versatility, but they suffer low power efficiencies when operating at conditions significantly different from the nominal operating point. The required bulky and heavy thermal management components deem these electric propulsion systems impossible to fit on board nano-satellites. Here we present a compact and efficient switched mode dc-RF power inverter integrated with an electro-thermal plasma micro-thruster for nano-satellite (e.g., Cubesats) propulsion. The integrated system can serve as side panels and structural support of CubeSats, saving precious on-board volume for propellant and/or payloads. A complete assembly has been operationally tested in a space simulation system. This development opens a route for a new generation of power supplies applicable to the space sector, the microelectronics industry as well as the field of bioengineering.

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Section: Switched Mode Dc-rf Power Inverter With Pcb Inductorsmentioning

confidence: 99%

Section: Switched Mode Dc-rf Power Inverter With Pcb Inductorsmentioning

confidence: 99%

An Integrated RF Power Delivery and Plasma Micro-Thruster System for Nano-Satellites

et al. 2018

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“…Squared spiral inductors present a geometry which adapts well to screen‐printing fabrication. In order to fabricate them, it is necessary to solve two technical problems: the first one is to find a way to connect the center tip of the spiral with the external circuit; the second one is to reach an appropriate level of resolution allowing printing the fine lines and spaces of the spiral (Vanek et al , 2007). The proposed solution for the first problem is installing a wire bonding, similar to the ones described in Section 4.…”

Section: Inductorsmentioning

confidence: 99%

Creating screen‐printed passive components for microwave applications

Arenas

Jarrige

Boone

2010

Microelectronics International

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PurposeThe purpose of this paper is to share valuable information about low‐cost microwave circuit research with academic and industrial communities that work, or want to work, in this field.Design/methodology/approachScreen‐printing technology has been chosen as the fabrication method because of simplicity and low costs. Different materials and printing parameters were tested in four generations of microstrip lines. After obtaining a satisfactory fabrication method, passive microwave components were printed, assembled, characterized and modeled.FindingsResults demonstrated that the proposed low‐cost method allows fabricating low loss microstrip lines (15.63×10−3 dB/mm at 10 GHz), filters, inductors, and capacitors that work well up to 12 GHz.Research limitations/implicationsModel accuracy of inductors and capacitors can be improved. The use of more precise calibration and de‐embedding techniques is necessary. More components can be fabricated and modeled to increase the flexibility and applicability of the proposed fabrication method.Practical implicationsThe presented information can help limited budget companies and small educational institutions in electronics to fabricate microwave circuits at low costs. This is an excellent approach for students who want to learn how to make microwave frequency measurements and circuits without the need of expensive fabrication equipment and clean rooms.Originality/valueThe step‐by‐step fabrication method described in this paper allows fabricating different microwave components at low costs. The presentation of electrical models for each component completes the design‐fabrication cycle. As this information is gathered in a single source, it makes easier the incursion of new actors in the microwave field.

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“…PCBs have been used to make air core inductors [2], [3], [14]- [19] with various shapes including spirals [14]- [16], [19], solenoids [18] and toroids [2], [3], [17]. Since toroidal inductors have relatively low external magnetic fields, they are favored in many applications where it is important to mitigate unintentional coupling and reduce eddy current losses.…”

Section: Introductionmentioning

confidence: 99%

3-D-Printed Air-Core Inductors for High-Frequency Power Converters

Liang

Raymond

Rivas

2016

IEEE Trans. Power Electron.

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This paper presents the design, modeling and characterization of 3D printed air core inductors for high frequency power electronics circuits. The use of 3D modeling techniques to make passive components extends the design flexibility and addresses some of the fabrication limitations of traditional processes. Recent work [1]-[9] has demonstrated the feasibility of incorporating air core inductors in high frequency (>10 MHz) switching power converters. These implementations have used discrete wire wound solenoids and toroids, and planar components that use Printed Circuit Board (PCB) traces or microfabrication techniques to make air core inductors. However, realizations of such components have limitations in performance and applicability including open paths conducive to the flow of leakage fields, and difficulties in achieving optimal cross-section to minimize loss. Along with the current effort of involving 3D printing technology to make inductors [10], [11], we propose the use of 3D printing and casting/plating techniques as a simple and accessible alternative that adds flexibility and functionality to air core inductor design for high frequency power conversion at moderate to high power (e.g. tens to thousands of watts) and high voltage (greater than 100 V) levels. In this paper, we present several examples of air core inductors realized using 3D printing and casting/plating techniques to give an idea of the geometries that are possible to design. Moreover, we show that some of these designs can lead to improved electrical performance.The paper also describes the tools used by the authors to design, fabricate and characterize the electromagnetic performance of the air core inductors. The software used to generate the 3D scaffolds for the inductors are freely available and easily accessible. Readers are encouraged to explore more possibilities of geometries that can lead to better performance with the ease of manufacturing. As progress in additive manufacturing continues, we envision 3D printing of a complete scaffold structure that after plating (or casting) will contain all resonant passive components of an RF switching converter. Toward this goal, we present a 70 W prototype 27.12 MHz resonant inverter that incorporates some of the 3D printed components developed for this work.Index Terms-3D printed air core inductor, high frequency power converters.

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Optimization of Properties of Planar Spiral Inductors

Cited by 7 publications

References 1 publication

An Integrated RF Power Delivery and Plasma Micro-Thruster System for Nano-Satellites

An Integrated RF Power Delivery and Plasma Micro-Thruster System for Nano-Satellites

Creating screen‐printed passive components for microwave applications

3-D-Printed Air-Core Inductors for High-Frequency Power Converters

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