Abstract: This disclosure is directed to broadband polarization diversity antennas. In one aspect, a polarization diversity antenna includes a baseboard with a baseboard-feed line located on a first surface. The baseboard-feed line includes a serpentine meander-line portion. The antenna also includes an antenna-array board with two or more antenna elements arranged in a series. The antenna-array board is attached to the first surface with the serpentine meander-line portion located between an edge of the antenna-array board and the baseboard. Each antenna element is connected to the serpentine meander-line portion via an antenna-feed line located on the antenna-array board. The antenna array provides two dimensional polarization broadcasting and receiving of electromagnetic radiation. In another aspect, a notch antenna is formed on an opposing second surface of the baseboard opposite the antenna-array board in order to provide three-dimensional polarization broadcasting and receiver of electromagnetic radiation.

Abstract: This disclosure is directed to a broadband notch radiator antenna. In one aspect, a broadband notch radiator antenna includes a dielectric substrate having a first surface and a second surface. A conductive material is disposed on the first surface to form a horn-shaped dielectric notch antenna. The conductive material disposed on the first surface includes a meander line antenna connected to an edge of the horn-shaped notch. One or more microstrip feed lines and one or more inductance matching circuits are disposed on the second surface. The one or more inductance matching circuits are connected to the one or more feed lines.