Influence of temperature distribution on behavior, modeling, and reliability of BAW resonators

Influence of dissipated power distribution on BAW Resonators' behavior

“…In [4] it has been shown that self-heating leads to a temperature gradient across the different layers within the solidly mounted BAW resonator (SMR BAW). Moreover, in our previous work [5] we have proved that not only the temperature gradients across the different layers but also within the single layers ! "#$%&$" have an impact on the transfer function and, therefore, should be taken into account in order to improve the modeling of the BAW devices at higher power levels.…”

“…Finally, the acoustic and EM simulations are repeated providing the behavior of the resonator during the high power load. The procedure for EM 3D modeling, the acoustic 1D modeling, and the thermal 3D modeling were already presented in our previous work [5]. The approach of taking the spatial temperature distribution was discussed there in detail.…”

Study of transient characteristics of BAW filters under high power levels

“…[10][11][12] A shift of the transfer function to lower frequencies for increasing power levels was reported. [13][14][15][16][17] The research of [18][19][20] indicated that the absorbed power of the resonators had a noticeable left-shift when power increased. And in Refs.…”