Optimized Shielding Pattern of RF Faraday Cage

The application of UHF radio-frequency identification (RFID) systems is rapidly increasing. However, because band near the frequency for the UHF-RFID system is also used with the cellular phone, the influence on UHF-RFID system is worried. Prepare the Faraday cage is easy to solve this problem, but generally it shields external noise frequency by broadband. So, It makes difficult to using wireless communications in the inside and outside of Faraday cage. On the other hand, it's easy to control target frequency for self resonance pattern. This paper describes Faraday cage with special pattern which shields mainly target frequency, and it has suitable shielding effectiveness which enables wireless communication in other frequency band.