Single feed distributed antenna system

摘要

A radio system provides multi-antenna coverage of an area in an efficient and affordable manner. The radio system includes a base radio to transmit and communicate with and through multiple antennas spaced throughout a substantially radio opaque structure through a single transmission line. The base radio has an antenna port that connects the base radio to a transmission line. Several directional couplers are spaced in line with the transmission line corresponding with the areas where antenna coverage is needed.

主权项

1. A radio system comprising:
a base radio having an antenna port; a first transmission line portion coupled to the antenna port; a first directional coupler having an input port coupled with the first transmission line portion, an output port, and a tap port; a second transmission line portion coupled to the output port of the first directional coupler; a second directional coupler having an input port coupled to the second transmission line portion and a tap port; a first antenna connected to the tap port of the first directional coupler; and a second antenna connected to the tap port of the second directional coupler, wherein the first antenna and the second antenna are generally electrically isolated from each other, wherein the base radio in a transmit mode transmits a signal out the antenna port of the base radio across the first transmission line portion to the input port of the first directional coupler where a portion of the signal is communicated out the tap port of the first directional coupler and broadcast from the first antenna, and wherein the remaining portion of the signal is communicated out the output port of the first directional coupler across the second transmission line portion to the input port of the second directional coupler where another portion of the signal is communicated out the tap port of the second directional coupler and broadcast from the second antenna.