RF MEMS for channelizing low-power radios

Abstract

RF MEMS technologies are evalua their potential to realize the RF frequen targeted for true software-defined cog ultra-low power autonomous sensor netw RF channel-selection, as opposed to ban to substantial increases in call volume reduction in power consumption. The M most conducive to RF channel-selecting vibrating micromechanical resonators t on-chip Q's at GHz frequencies; reson provide extremely efficient switched-mo both transmit and receive paths; and m grated micromechanical circuits that switchable filter-amplifier banks.

Capacitive-Piezoelectric Transducers for High-<inline-formula> <tex-math notation="LaTeX">$Q$ </tex-math></inline-formula> Micromechanical AlN Resonators

“…For example, small percent bandwidth filters that require high Q resonators generally do not require large coupling, i.e., the smaller the bandwidth, the higher the needed Q, but the more modest the needed electromechanical coupling. Thus, given that piezoelectric resonators generally possess ample coupling, but insufficient Q, even if a capacitive-piezo transducer only provides a trading of coupling for Q, this trade-off could be instrumental to making possible the tiny percent bandwidth filters needed for RF channelselecting front-end filters and all their associated benefits [40].…”