Microsystems-based method and apparatus for passive detection and processing of radio-frequency signals

A method for operating a radiofrequency device, comprising:

• in a passive impedance transforming voltage amplifier, amplifying modulations of a radiofrequency (RF) carrier, the modulations having a fundamental frequency, thereby to produce an RF actuation signal;
• applying a DC bias to a DC bias electrode positioned to latch a MEMS switch in a closed position by electrostatic attraction when the DC bias electrode is energized by a suitable voltage;
• and
• while applying the DC bias, applying the RF actuation signal to an RF actuation electrode of the MEMS switch;
• wherein:
• the RF actuation electrode is distinct from the DC bias electrode;
• the MEMS switch comprises a bridge that physically and electrically contacts the DC bias electrode when the MEMS switch is in the closed position;
• the bridge is configured with a mechanical mode of vibration that, when subjected to the RF actuation signal having the fundamental frequency that matches at least one frequency of the said mechanical mode of vibration, allows the MEMS switch to be periodically urged toward the closed position;
• and
• the RF actuation signal is applied such that when the RF actuation signal includes the fundamental frequency that matches at least one frequency of the said mechanical mode of vibration, the RF actuation signal increasingly excites the said mechanical mode of vibration until the MEMS switch reaches the closed position.