Multi-beam Yagi-based MIMO antenna system

A method of constructing an orthogonally polarized Yagi-like MIMO antenna system, the method comprising:

• forming at least one loop element on a top side of a substrate, wherein one of the at least one loop element has at least two input ports,
• placing, for the one of the at least one loop element having at least two input ports, one of the at least two input ports in a direction that is orthogonal to another one of the at least two input ports such that two of the at least two input ports are placed orthogonally to each other,
• forming, for each of the two input ports placed orthogonally to each other, at least one reflector,
• placing, for each of the two input ports placed orthogonally to each other, one of the at least one reflector associated with the respective input port in a direction that is opposite to the respective input port, and
• exciting the two input ports placed orthogonally to each other by a guide wavelength 1.3 λg in a loop resonance mode.

A triangular printed wideband Yagi based MIMO antenna system, comprising:

• a substrate having a top side and a bottom side;
• three loop elements on the top side of the substrate, wherein each of the three loop elements is placed at 120° with respect to other two loop elements;
• and
• at least one reflector, wherein one of the at least one reflector is placed on the bottom side of the substrate.