Garcia, D.; Gonzalez, M.; Hueltes, A.; Collado, J.; Mateu, J.; Gonzalez, J.; Kreuzer, S.; Aigner, R. IEEE International Ultrasonics Symposium p. 1-4 DOI: 10.1109/ULTSYM.2017.8091793 Data de presentació: 2017-09-08 Presentació treball a congrés
This work presents a broadband characterization and modeling of the second harmonic nonlinear response in Bulk acoustic wave (BAW) resonators. The proposed circuit model is based on the constitutive equations describing the behavior of all materials used on the different layers of the resonator. These constitutive equations are extended for both the linear and nonlinear domain, and allow to explain all the features observed in the nonlinear response over all the characterized bandwidth. This circuit model is used to explain the nonlinear effects occurring in two different BAW resonators, and concludes that in addition to the well-known nonlinear behavior of the main piezoelectric layer, other layers of the Bragg mirror also contribute to the overall nonlinear response.
This work is part of a project where the goals
are: designing energetically-optimum domestic WiFi routers;
obtaining real and accurate power consumed models as a function
of router configuration, and providing the community with
an active power waveforms database, useful for considering
power consumption as a part of WiFi networks design and
In particular, in this paper we started by measuring the
active power consumption of a standard router under several
scenarios. These take into account physical transmission rates,
operation modes (transmitting/receiving), transmission powers,
compatibility modes, type of traffic, packet sizes, encryption,
ethernet connections, ...
The paper reports the setup, measurement method, the
first results and conclusions where the impact of the AC/DC
converter on the power consumed is also considered.