Multi-band MIMO antenna

摘要

A multi-band antenna system for MIMO applications is adapted to provide high isolation between antennas across a wide range of frequencies. Multiple Isolated Magnetic Dipole (IMD) antennas are co-located and connected with a feed network that can include switches that adjust phase length for transmission lines connecting the antennas. Filtering is integrated into the feed network to improve rejection of unwanted frequencies. Filtering can also be implemented on the antenna structure. Either one or multi-port antennas can be used.

主权项

1. A multiband MIMO antenna system, comprising:
a first antenna element comprising a first feed port; a second antenna element comprising a second feed port; a first transmission line extending between said first and second feed ports; and a second transmission line extending between said first and second feed ports, said second transmission line further comprising at least one filter adapted to reject one or more frequencies for optimizing isolation between the first and second antenna elements; and a switch disposed between said first feed port of the first antenna element and said filter on said second transmission line.