Design of functional wall considering oblique incidence

The wireless telecommunication environment in indoor location is adversely affected by multiplex reflection interference. The suppression of reflection interference is indispensable for the reliability improvement of the wireless network system. The ultrathin microwave absorber in consideration of indoor use is developed for reduction of the multiple reflections. Unfortunately, this absorber causes shielding fault for other UHF band, it is pointed out that deteriorate wireless communication environment. Consequently, the functional wall that can be absorbed to the micro-wave used with UHF-RFID systems, and can be penetrated to the signal used with ambient sensor network is proposed in this report.