Spatially decoupled varactor biasing for a tunable staircase filter

Botes, Elmine; Meyer, P.

doi:10.1049/iet-map.2015.0642

Cited by 2 publications

(1 citation statement)

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“…On the other hand, low-cost components such as varactors [13,14] and PIN [15,16] diodes are used in tunable microwave structures. One or more varactors can be integrated to modify the central frequency of the resonators and PIN diodes are frequently used to provide the switching function (ON/OFF states).…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Microfluidically Tunable Microwave Filters

Habbachi

Besbes

2022

Electronics

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This paper presents a contribution to evaluating the performances of tunable devices devoted to RF applications. It is based on reconfiguration by fluids of a capacitor/inductor associated in a monolithic substrate. Indeed, the association of two microfluidic passive devices on the same wafer allows us to increase the total frequency response of microwaves structures. The study evokes the presence and displacement of different conductive and dielectric liquids in the structure microchannels. The theoretical analysis concerns the association of microfluidic devices, a capacitor and inductor, in parallel topology. The obtained results show a good agreement between electrical parameters and the microwave response. Furthermore, a significant frequency variation from 370 MHz to 1720 MHz is achieved, with a tuning range that reaches 364.8%. The experimental part exhibits the fabrication and characterization of two structures in order to evaluate the response of microfluidic actuation for two architectures: a pass-band filter (presented in prior work) and a stop-band filter. The obtained results are in good agreement with the modeled behavior and demonstrate a large tuning range for the stop-band filter.

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