45 research outputs found
A Compact Semi-Lumped Tunable Complex Impedance Transformer
International audienceThis article describes the design and performance of a compact tunable impedance transformer. The structure is based on a transmission line loaded by varactor diodes. Using only two pairs of diodes, the circuit is very small with a total length of only λ/10. Both the frequency range and the load impedance can be tuned by varying the varactor bias voltages. Our design provides a tunable operating frequency range of ± 40% and an impedance match ranging from 20 Ω to 90 Ω at 0.8 GHz and from 30 Ω to 170 Ω at 1.5 GHz. In addition, a new approach that considers losses for the simulation and measurement of this impedance transformer was investigated. The measured performance of a 1 GHz prototype design confirmed the validity of this new approach
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National audienc
Coupled Resonator Filters: wide-band modeling, frequency versus pseudo-time characterizations
International audienc
"Industrial combining RF and system test of microwave devices using QPSK modulation"
International audienc
Miniaturized DBR Filter: Formulation and Performances Improvement
International audienc
Miniature DBR Filters Compatible with Low Cost Substrates: Formulation
International audienc
"Nonlinear Behavior of AlN in BAW and CRF devices for high RF Electric Field"
International audienc
"Nouvelle méthode de test de dispositifs RF basée sur l'utilisation de modulations numériques"
National audienc