Founded in 1992, Phase IV Engineering, Incorporated, provider of world-class RF solutions, is a veteran-owned small business headquartered in Boulder, Colorado.

For over eighteen years Phase IV has been engaged in research, development and production of both passive and active wireless sensing and monitoring products. We are the inventors of passive (battery-free) wireless sensing based on RFID (Radio Frequency Identification) technology. Our passive technology provides the communications and identification capabilities of RFID with sensing and monitoring included. To these Passive RFID and Active RFID sensing systems, Phase IV has added GPS, local area network and SATCOM communication links for world-wide, infrastructure-free tracking and monitoring. These systems, originally developed for aerospace and military applications, have now been optimized for commercial applications including agriculture, transportation and industrial applications.

Our innovative technologies offer platforms that enable our customers to find creative and breakthrough solutions to challenging sensing and communications problems.