ANTENNA SYSTEM FOR NARROWBAND COMMUNICATIONS SYSTEMS AND METHOD OF OPERATION

摘要

There is disclosed an improved base station (411) for communicating with communication units (121, 122) in a wireless messaging system (400). According to an advantageous embodiment, the base station comprises: 1) a transmitter (306) that is capable of transmitting messages to the communication units (121, 122) in a forward-channel having a first frequency range; 2) a receiver (307) that is capable of receiving messages from the communication units (121, 122) in a reverse-channel having a second frequency range; and 3) an antenna (303) that is capable of transmitting the forward-channel messages (312) at a first angle of electrical downtilt below the horizon and receiving the reverse-channel messages (313) at a second angle of electrical downtilt, wherein the second angle of electrical downtilt is less than the first angle of electrical downtilt.