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A TRL-multiline de-embedding technique for the determination of the electrical parameters of interdigitated varactors over a broad centimetre–millimetre band is proposed. The method is applied to voltage-controlled ferroelectric (BaSrTiO3) varactors, which exhibit almost constant frequency dependence of the capacitance (ɛr∼300) from 10 to 60 GHz. The capacitance ratio is ∼2 for a 30 V bias offset, and the quality factor is of the order 10 at 30 V.
Inspec keywords: varactors; titanium compounds; barium compounds; ferroelectric devices; strontium compounds
Other keywords:
Subjects: Capacitors; Ferroelectric devices