Varactor based tunable inductor design

Amirpour, Mostafa; Akbari, Saeed; Sani, Ebrahim Abbaspour; Azarmanesh, Mohammad Naghi

doi:10.1109/iraniancee.2015.7146443

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…18 . Microwave or optical realization of the abovementioned circuits can be accomplished using p-n junctions or varactor-based variable capacitors 25,26 and varactor-based or thyristor-based variable inductors [27][28][29] . Loading a transmission line with an array of cascaded omega-metamaterial structures which is tuned by multiple varactors would yield spatiotemporal capacitance and inductance modulation 30 .…”

Section: Problem Definitionmentioning

confidence: 99%

Leveraging space–time modulation for energy coupling control in electromagnetic coupled transmission lines structures

Baharian

Mohassel

2023

Sci Rep

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This article presents a technique for controlling energy coupling in a coupled transmission line system based on the space–time modulation concept. The per-unit-length mutual capacitance and mutual inductance of the structure are modulated in space and time. The main idea is based on the harmonic generation property of space–time modulated media. As the amplitude of harmonics is a function of modulation parameters it is demonstrated that by choosing an appropriate space–time modulation scheme energy of different harmonics can be engineered leading to crosstalk reduction. In the quest for designing an effective space–time modulation scheme, an analytical method is developed for the examination of the space–time modulated coupled transmission line. The proposed method which is based on the state space formulation and benefits from the coupled mode theory is fast and accurate making it feasible for design problems. To validate the proposed analytical method, a full-wave simulation method has been used. The time-varying nature of the problem makes the finite-difference-time-domain the most appropriate choice. The validity of the analytical method is rigorously verified against the developed finite-difference-time-domain technique. The interest in circuit design techniques in an IC-compatible fashion in microwave circuits and the introduction of tunable material such as graphene in the THz regime leads to a positive future for the proposed space–time modulation-based crosstalk reduction method.

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Section: Problem Definitionmentioning

confidence: 99%

Leveraging space–time modulation for energy coupling control in electromagnetic coupled transmission lines structures

Baharian

Mohassel

2023

Sci Rep

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“…Tunable inductors with good values can lead to reconfigurable communication systems. Tunable inductors are building blocks of reconfiguration resonators, filters, impedance matching networks, voltage-controlled oscillators (VCOs), or power amplifiers [1]. Due to demand for high performance and small size, RF tunable inductors have a major role in RF circuit design.…”

Section: Introductionmentioning

confidence: 99%

Tunable Inductors Using Integrated Vanadium Dioxide Phase Change Thin Films

Wang

Shin

et al. 2018

Advances in Condensed Matter Physics

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This paper presents tunable inductors designed with vanadium dioxide (VO 2 ) thin film to implement tunability. Two types of configurations, a single line coil inductor and a dual line coil inductor, are proposed. Tunable inductance is realized by thermally controlling VO 2 thin film stub to be an insulator or a conductor. The measurements of inductors are taken in the frequencies range from 0.01 GHz to 10 GHz. The electrical model has been developed to derive the corresponding inductance. The results show that the tuning range is about 69% when the temperature changes from room temperature to above the critical temperature of 68 ∘ C.

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Space-Time Modulation: Principles and Applications

2020

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The ever-increasing demand for high data rate wireless systems has led to a crowded electromagnetic spectrum. This demand has successively spurred the development of versatile microwave and millimeter-wave integrated components possessing high selectivity, multi-functionalities and enhanced efficiency. These components require a class of nonreciprocal structures endowed with extra functionalities, e.g., frequency generation, wave amplification and full-duplex communication. Space-time (ST) modulation has been shown to be a perfect candidate for high data transmission given its extraordinary capability for electromagnetic wave engineering. Spacetime-modulated (STM) media are dynamic and directional electromagnetic structures whose constitutive parameters vary in both space and time. Recently, STM media have received substantial attention in the scientific and engineering communities. The unique and exotic properties of STM media have led to the development of original physics concepts, and novel devices in acoustics, microwave, terahertz and optic areas. STM media were initially studied in the context of traveling wave parametric amplifiers in the 50s and 60s [1]- [6]. In that era, magnet-based nonreciprocity was the dominant approach to the realization of isolators, circulators and other nonreciprocal systems. However, magnet-based nonreciprocity is plagued with bulkiness, nonintegrability, heaviness and incompatibility with high frequency techniques.Recently, ST modulation has experienced a surge in scientific attention thanks to its extraordinary and unique nonreciprocity. It eliminates issues of conventional nonreciprocity techniques, such as bulkiness, heaviness and incompatibility with integrated circuit technology associated with magnetbased nonreciprocity, power restrictions of nonlinear-based nonreciprocity, and frequency limitations and low power handling of transistor-based nonreciprocity. It provides asymmetric interband photonic transitions [7]-[14], subluminal and superluminal phase velocities, and asymmetric dispersion diagrams [4], [11], [13], [14], and holds potential for energy accumulation [15]. Various enhanced-efficiency magnet-free microwave and optical components have been recently realized by taking advantage of the unique properties of ST modulation, including isolators [9], [11], [16]-[19], circulators [20]-[23],

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Varactor based tunable inductor design

Cited by 4 publications

References 7 publications

Leveraging space–time modulation for energy coupling control in electromagnetic coupled transmission lines structures

Leveraging space–time modulation for energy coupling control in electromagnetic coupled transmission lines structures

Tunable Inductors Using Integrated Vanadium Dioxide Phase Change Thin Films

Space-Time Modulation: Principles and Applications

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