Abstract: An antenna horn includes an upper waveguide ridge and a lower waveguide ridge shaped to provide impedance matching. The antenna horn operates unimodally within a 6:1 instantaneous bandwidth. A circular array of antenna horns produces an enhanced radiation pattern in a horizontal plane with reduced radiating in the direction orthogonal to the horizontal plane. Furthermore, two circular arrays of half-height antenna horns may be arranged on a collinear axis, offset by one half of a sector width as defined by each horn aperture to reduce coupling.

Abstract: An antenna array includes a flexible microstrip PCB feed layer and a plurality of radiating elements attached to the flexible PCB feed layer. The radiating elements comprise a Tau scalable log periodic array of low profile radiating elements for producing a monopole, end fire radiation pattern. Radiating elements include printed inverted F antenna elements and multi-arm puck elements for circular polarization. The antenna array is conformable to a curved surface. The radiating elements can be either integrated within a multi-layer flex or rigid flex PCB, or configured as individual elements that are die attached to a common ground plane flex circuit.

Abstract: An antenna array includes a flexible microstrip PCB feed layer and a plurality of radiating elements attached to the flexible PCB feed layer. The radiating elements comprise a Tau scalable log periodic array of low profile radiating elements for producing a monopole, end fire radiation pattern. Radiating elements include printed inverted F antenna elements and multi-arm puck elements for circular polarization. The antenna array is conformable to a curved surface. The radiating elements can be either integrated within a multi-layer flex or rigid flex PCB, or configured as individual elements that are die attached to a common ground plane flex circuit.