Improved noise isolation design of UHF mobile radio frequency identification reader system in package

Recently, one of the most frequently mentioned keyword is "ubiquitous", which shows that radio frequency identification (RFID) becomes important and its demands are extremely expanding in the market. As mobile applications are widely spreaded, the importance for the RFID expands not only to the stationary reader systems but also the mobile readers. As the size of the mobile application with multi-function decreases, the most considerable factors of the RFID reader used in mobile applications are size and power consumption. We have designed two chips including a digital circuit, a receiver, and a transmitter. Furthermore, we have integrated those designed chips in a single package whose dimension is 23 mm by 23 mm with low power consumption (1 watt). In this paper, we propose and verify design of chips and package for the mobile RFID reader.