A phasing structure includes a support matrix for a reflective surface which reflects microwaves within an operation frequency band. A Referential Preservation Engine maintains a database in which the location of web site documents and reference information are stored and updates various URL hyperlink references contained in the web pages on the site so that users can locate documents that have been moved to new storage locations. At least one securing element configured for engagement with the at least one channel of the sign-holding portion of the mounting bracket is included on a back surface of the sign-holder.