Frequency Tuning and Spurious Signal Generation at Microwave Frequencies in Ferroelectric Thin-film Transmission Lines
Jordi Mateu, James Booth, S. A. Schima
This work evaluates the RF tuning and the microwave nonlinear response of SrTiO3u thin-films by measuring the third harmonic and third order intermodulation proucts of several coplanar transmission lines. From these measurements, we obtain the distributed nonlinear capacitance per unit lenght as a function of RF bias voltage, C(Vrfu) using an accurate equivalent circuit to model the spurious signal generation. A unique value of C(Vrfu) is used to described the third harmonic generation, 3f1u and 3f2u, and the third order intermodulation products at 2f1+f2 and 2fd2+f1u frequencies, in a time scale range from hundreds of picoseconds to milliseconds. We compare C(Vdu) and obtain excellent agreement for 50K and 76K temperatures. From this result we interpret that equal tunability can be achieved from DC to nanosecond time scales, and that some of the spurious signals generated in STO ferroelectric transmission lines can be predicted directly from bias measurements.
June 11-16, 2006
San Francisco, CA, USA
IEEE MTT-S International Microwave Symposium
ferroelectric transmission lines, Rf tuning, thin films
, Booth, J.
and Schima, S.
Frequency Tuning and Spurious Signal Generation at Microwave Frequencies in Ferroelectric Thin-film Transmission Lines, IEEE MTT-S International Microwave Symposium, San Francisco, CA, USA
(Accessed December 6, 2023)