Point-to-multipoint antenna structure using multiple passive antennas

A fixed-position transmitter node for making wireless links to two or more fixed-position receiver nodes located within a non-omnidirectional composite coverage volume for the transmitter node, the transmitter node comprising:

• a radio source that provides an RF signal to be transmitted to the fixed-position receiver nodes via the wireless links;
• and
• an antenna structure comprising:
• an RF power splitter coupled to the radio source, for splitting the RF signal into two or more RF signals;
• two or more passive narrow-beam antennas coupled to the RF power splitter, the passive narrow-beam antennas making point-to-point wireless links to different fixed-position receiver nodes, wherein each passive narrow-beam antenna is characterized by an individual coverage volume having a narrow beam of approximately 1 to 3 degrees in azimuth directionally oriented toward one of the different fixed-position receiver nodes, and the individual coverage volumes together define the non-omnidirectional composite coverage volume;
• and
• an RF transparent enclosure that houses the RF power splitter and the two or more passive narrow-beam antennas.