Abstract: A power combining apparatus includes an output waveguide section having inner and outer coaxial conductors, wherein an outer surface of the inner conductor and an inner surface of the outer conductor each includes a substantially linear taper, a center waveguide section having an input, an output, and a plurality of antenna elements, the output of the center waveguide section being coupled to the output waveguide section, and an output waveguide section coupled to the output of the center waveguide section.

Abstract: A passive coaxial signal power splitter apparatus includes an input port, an input coaxial waveguide section coupled to the input port, a guided wave structure coupled to the input coaxial waveguide section, a plurality of antenna elements arranged in the guided wave structure, and an output port coupled to each of the antenna elements. A passive coaxial signal power combiner includes a plurality of input ports, a guided wave structure coupled to the plurality of input ports, a plurality of antenna elements in the guided wave structure, wherein each antenna element is coupled to one or more of the input ports, a coaxial waveguide section coupled to the guided wave structure, and an output port coupled to the coaxial waveguide section.

Abstract: A power combining apparatus includes a waveguide structure and a plurality of antenna elements arranged in the waveguide structure, wherein each of the antenna elements comprises a center planar antenna layer, two outer planar antenna layers arranged on opposite sides of the center planar antenna layer, a non-conductive layer between the center planar antenna layer and one of the outer planar antenna layers, and another non-conductive layer between the center planar antenna and the other one of the outer planar antenna layers. The power combining apparatus includes a waveguide structure having an input, an output, and a plurality of antenna elements arranged in the waveguide structure, wherein each antenna element is configured to transform an electric field direction of an electromagnetic field by substantially 90 degrees rotation about a longitudinal axis of the waveguide structure, wherein a bandwidth of the antenna is less than, equal to, or greater than a decade of frequency range.

Abstract: A passive coaxial signal power splitter apparatus includes an input port, an input coaxial waveguide section coupled to the input port, a guided wave structure coupled to the input coaxial waveguide section, a plurality of antenna elements arranged in the guided wave structure, and an output port coupled to each of the antenna elements. A passive coaxial signal power combiner includes a plurality of input ports, a guided wave structure coupled to the plurality of input ports, a plurality of antenna elements in the guided wave structure, wherein each antenna element is coupled to one or more of the input ports, a coaxial waveguide section coupled to the guided wave structure, and an output port coupled to the coaxial waveguide section.

Abstract: A power combining apparatus includes an output waveguide section having inner and outer coaxial conductors, wherein an outer surface of the inner conductor and an inner surface of the outer conductor each includes a substantially linear taper, a center waveguide section having an input, an output, and a plurality of antenna elements, the output of the center waveguide section being coupled to the output waveguide section, and an output waveguide section coupled to the output of the center waveguide section.

Abstract: A power combining apparatus includes a waveguide structure and a plurality of antenna elements arranged in the waveguide structure, wherein each of the antenna elements comprises a center planar antenna layer, two outer planar antenna layers arranged on opposite sides of the center planar antenna layer, a non-conductive layer between the center planar antenna layer and one of the outer planar antenna layers, and another non-conductive layer between the center planar antenna and the other one of the outer planar antenna layers. The power combining apparatus includes a waveguide structure having an input, an output, and a plurality of antenna elements arranged in the waveguide structure, wherein each antenna element is configured to transform an electric field direction of an electromagnetic field by substantially 90 degrees rotation about a longitudinal axis of the waveguide structure, wherein a bandwidth of the antenna is less than, equal to, or greater than a decade of frequency range.