The outstanding fabrication tolerances and scalability of IC processes have made MMICs the technology of choice for nearly all planar microwave components, including amplifiers, mixers, switches, oscillators--even fully integrated transceivers. However, fixed filters have been untouched by the MMIC revolution due to outdated assumptions about performance and availability. In this article, we examine the filter landscape and explain why MMIC should be the technology platform of choice for many filter applications.