RF-MEMS chip matches cell phone antenna impedance dynamically

摘要

Aspiring fabless semiconductor house WiSpry Inc. (Irvine, Calif.) recently laid claim to sampling the world's first integrated radio-frequency microelectro-mechanical system. The MEMS chip-a digital capacitor array on a CMOS die-can match a cell phone's antenna impedance dynamically, rather than have it set at the factory, thereby saving dropped calls and extending battery life.