I have spent a few days going through your website and found a lot of very useful information, but I am stuck and was wondering if you could help point me in the right direction. I have an area measuring 4 kilometers by 4 kilometers, split into areas of 150 meters by 150 meters. This area has a series of containers, boxes and other assets, and in each corner I have a pylon. I am looking to use a directional antenna from each pylon to create a box, and I want to use a passive system with no batteries to monitor when an object enters and leaves that area. Where can I find such technology? Everything I have found so far needs a battery, or the range is not good enough.
There is nothing I could recommend that would meet your precise requirements. You could potentially use a passive UHF RFID reader in each room and have battery-assisted passive (BAP) RFID transponders on each container. BAP tags have a longer read range than regular passive tags. You could also put the reader around the doorway to each room, rather than on a pylon, if you only need to know an item is in a 150-meter by 150-meter area. There are passive real-time location systems that use nodes to energize the passive tags and overhead readers that can locate a tagged object to within about 10 feet. This might also be an option if the rooms or areas are not enclosed.
—Mark Roberti, Founder and Editor, RFID Journal
Previous Post How Can RFID Be Used for Toll Gates? »