Electrically controlled variable inductors for applications in tunable filters

Buyantuev, Bair; Vorobev, Evgenii; Turgaliev, Viacheslav; Kholodnyak, Dmitry; Baskakova, Alexandra

doi:10.23919/mikon.2018.8405264

Cited by 1 publication

(3 citation statements)

References 14 publications

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“…The differences in the level of effectiveness between cases using iron particles [case (1−3) and (5−7)] and cases using ferrofluid [cases (4) and (8)] are due to the lower concentration of ferrite particles in the ferrofluid. In case (9), bringing the magnet close to the inductor disrupts its magnetic field lines and changes the permeability of space proximal to the inductor, which alters the unit's inductance.…”

Section: Resultsmentioning

confidence: 99%

“…8 In addition, variable components serve a vital purpose in tunable filters, receivers, and transmitters. 9,10 The addition of these functions will significantly enhance the toolbox of soft electronic device designers.…”

Section: Introductionmentioning

confidence: 99%

“…Variable inductors can be used for voltage regulation, in tuning the frequencies of inductively coupled power transfer systems and power factor correction over long distances. − Variable capacitors can also be used for tuning the resonance frequency and capacitive reactance of electrical circuits . In addition, variable components serve a vital purpose in tunable filters, receivers, and transmitters. , The addition of these functions will significantly enhance the toolbox of soft electronic device designers.…”

Section: Introductionmentioning

confidence: 99%

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Magnetically Actuated Tunable Soft Electronics

et al. 2019

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Variable electronics are vital in tunable filters, transmitters, and receivers, among other applications. In addition, the ability to remotely tune soft capacitors, resistors, and inductors is important for applications in which the device is not accessible. In this paper, a uniform method of remotely tuning the characteristic properties of soft electronic units (i.e. inductance, capacitance, and resistance) is presented. In this method, magnetically actuated ferrofluid mixed with iron powder is dragged in a soft fluidic channel made of polydimethylsiloxane (PDMS) to tune the electrical properties of the component. The effects of position and quantity of the ferrofluid and iron powder are studied over a range of frequencies, and the changes in inductance, capacitance, resistance, quality factor, and self-resonance frequency are reported accordingly. The position plays a bigger role in changing inductance, capacitance, and resistance. With the proposed design, the inductance can be changed by 20.9% from 3.31 μH for planar inductors and 23% from 0.44 μH for axial inductors. In addition, the capacitance of capacitors and impedance of resistors can be changed by 12.7% from 2.854 pF and 185.3% from 0.353 kΩ, respectively. Furthermore, the changes in the inductance, capacitance, and resistance follow “quasi-linear profiles” with the input during position and quantity effect experiments.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%