Abstract: A broadband microwave coplanar antenna suitable for use in singular antenna or antenna array dispositions in a plurality of military and other present day uses. The disclosed antenna combines desirable characteristic of the patch and slot antenna forms into an arrangement having both patch resonances and slot resonances. These resonances may be individually accessed and either combined in frequency location or dispersed in frequency to accomplish a broadband combination antenna characteristic. Broadband electrical impedance characteristics are also provided in the dispersed resonance arrangement. The antenna includes a coplanar ground plane member disposed surrounding the active patch/slot element with both physical dimensions of the active patch/slot element and spacings from the ground plane element determining the resonances.

Abstract: An improved microstrip patch antenna has a pair, for example, of dielectric overlay strips attached along the radiating edges of the patch where the patch is rectangular. By optimizing dimensions parameters and materials, the bandwidth of the patch is increased substantially as well as the amount of radiated energy.

Abstract: An electrical energy transport arrangement has an arcuate boundary region of substantially constant radius. A first port is disposed substantially at the center of the curvature of the arcurate boundary region and lies at the boundary of the transport arrangement and in electrical communication with it. A plurality of second ports are disposed around the arcuate boundary region and in electrical communication with it. A preferred embodiment provides a purely planar configuration, which may optionally provide balanced phase and amplitude outputs. In other preferred embodiments, there are provided unequal amplitude outputs.