MIMO antenna module and MIMO antenna unit for distributed antenna system

An antenna module, comprising:

• a first substrate having
• an area, and
• a conductive region that spans more than half of the area and that has an edge;
• a second substrate that is disposed over, and that is electrically coupled to the first substrate:
• an F antenna having a conductive trace disposed on the first substrate and configured to radiate a first signal having a wavelength and a first polarization;
• and
• a T antenna disposed on the second substrate over, and at least one fourth the wavelength from the edge of, the conductive region, and configured to radiate a second signal having the wavelength and a second polarization that is approximately orthogonal to the first polarization.

An antenna unit, comprising:

• a control module including a first substrate and at least one antenna-module connection region;
• and
• at least one antenna module each configured for engagement with an antenna-module connection region of the control module, and each including
• a respective second substrate,
• a respective F antenna disposed on the respective second substrate and configured to radiate a respective first signal having a respective wavelength and a respective first polarization that is approximately parallel to the respective second substrate, and
• a respective T antenna disposed on the respective second substrate and configured to radiate a respective second signal having the respective wavelength and a respective second polarization that is approximately orthogonal to the respective second substrate.

A distributed antenna system, comprising:

• a master unit;
• and
• at least one remote antenna unit coupled to the master unit and including
• a control module including a first substrate and at least one antenna-module connection region;
• and
• at least one antenna module each configured to engage one of the at least one antenna-module connection region, and each including
• a respective second substrate,
• a respective F antenna disposed on the respective second substrate and configured to radiate a respective first signal having a respective wavelength and a respective first polarization approximately parallel to the respective second substrate;
• and
• a respective T antenna disposed on the respective second substrate and configured to radiate a respective second signal having the respective wavelength and a respective second polarization that is approximately orthogonal to the respective second substrate.