Multi-function reconfigurable microwave component based on a switchable FET circuit

Kodera, Toshiro; Caloz, Christophe

doi:10.1109/mwsym.2013.6697361

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…Over the past decade, switchable/tunable microwave components have become an active research area, and much research reveals that tunable microwave components can improve the performances of RF and microwave devices in many ways. Improvements in the frequency of tunable devices, such as microelectromechanical systems (MEMS) [1][2][3][4], fieldeffect transistor (FET) couplers, power dividers, phase shifters, filters, sensors, switches [5,6] varactor diodes [7][8][9][10], and PIN diodes [11][12][13][14], permitted the popularity of frequencyswitchable technologies, leading to versatility and reliability of the systems. Despite many of the advantages of tunable devices, such as fast switching, improvement in bandwidth, and high quality they offered, these tunable mechanisms, on the other hand, have some drawbacks.…”

Section: Introductionmentioning

confidence: 99%

A Recent Approach towards Fluidic Microstrip Devices and Gas Sensors: A Review

et al. 2022

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This paper aims to review some of the available tunable devices with emphasis on the techniques employed, fabrications, merits, and demerits of each technique. In the era of fluidic microstrip communication devices, versatility and stability have become key features of microfluidic devices. These fluidic devices allow advanced fabrication techniques such as 3D printing, spraying, or injecting the conductive fluid on the flexible/rigid substrate. Fluidic techniques are used either in the form of loading components, switching, or as the radiating/conducting path of a microwave component such as liquid metals. The major benefits and drawbacks of each technology are also emphasized. In this review, there is a brief discussion of the most widely used microfluidic materials, their novel fabrication/patterning methods.

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Section: Introductionmentioning

confidence: 99%

A Recent Approach towards Fluidic Microstrip Devices and Gas Sensors: A Review

et al. 2022

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“…Improvements in frequency-switchable devices, such as PIN diodes [ 1 , 2 , 3 , 4 ], varactor diodes [ 5 , 6 , 7 , 8 ], radio frequency microelectromechanical systems (RF MEMS) [ 9 , 10 , 11 , 12 ], and field-effect-transistor (FET) switches [ 13 , 14 ] have enabled the growth of frequency-switchable technology, owing to its reliability and versatility. However, these switchable mechanisms need additional DC bias networks.…”

Section: Introductionmentioning

confidence: 99%

Frequency-Switchable Microfluidic CSRR-Loaded QMSIW Band-Pass Filter Using a Liquid Metal Alloy

Eom

Memon

Lim

2017

Sensors

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In this paper, we have proposed a frequency-switchable complementary split-ring resonator (CSRR)-loaded quarter-mode substrate-integrated-waveguide (QMSIW) band-pass filter. For frequency switching, a microfluidic channel and liquid metal are used. The liquid metal used is eutectic gallium-indium (EGaIn), consisting of 24.5% indium and 75.5% gallium. The microfluidic channels are built using the elastomer polydimethylsiloxane (PDMS) and three-dimensional-printed microfluidic channel frames. The CSRR-loaded QMSIW band-pass filter is designed to have two states. Before the injection of the liquid metal, the measured center frequency and fractional bandwidths are 2.205 GHz and 6.80%, respectively. After injection, the center frequency shifts from 2.205 GHz to 2.56 GHz. Although the coupling coefficient is practically unchanged, the fractional bandwidth changes from 6.8% to 9.38%, as the CSRR shape changes and the external quality factor decreases. After the removal of the liquid metal, the measured values are similar to the values recorded before the liquid metal was injected. The repeatability of the frequency-switchable mechanism is, therefore, verified.

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