Engineering brief explains use of DAS directional couplers

A 4-page technical brief from RF engineering specialist Bird Technologies explains the proper use of directional couplers in an in-building distributed antenna system (DAS).

"When facing the question of cable connections in a DAS, many designers or installers choose the easy answer of using standard two-way splitters for every cable and antenna junction," begins the document. "The splitters are relatively inexpensive, and there is no thinking required."

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The brief goes on to contend, "However, except for the simplest systems with very small coverage area and few antennas, the use of splitters will have a seriously negative impact on the system performance."

Illustrated schematic examples follow. The technical brief is the first in a 2-part series of articles from Bird describing "How to Properly Design an In-Building DAS."

View/Download the technical brief.