Penetration of Radio Signals Into Buildings in the Cellular Radio Environment

The use of portable and hand-held terminals in 850-MHz cellular radio systems involves a radio field environment inside buildings that differs from the more familiar highway and street propagation environment of the mobile terminal. The laws that define propagation over open and urban terrain are complicated by a penetration loss in the transmission of the signal into the building's interior. The characterization of this loss, as encountered in large office and commercial * Bell Laboratories. e Copyright 1983, American Telephone & Telegraph Company. Photo reproduction for noncommercial use is permitted without payment of royalty provided that each reproduction is done without alteration and that the Journal reference and copyright notice are included on the first page. The title and abstract, but no other portions, of this paper may be copied or distributed royalty free by computer-based and other information-service systems without further permission. Permission to reproduce or republish any other portion of this paper must be obtained from the Editor.