Agency for Defense Development

Kun Sup Kwon

Jong Wan Heo

Ki Min Hwang

Byung Chul Park

Sung Jae Lee

Seung Ho Kim

Chang Hyun Yoo

An antenna apparatus includes: a parabolic reflector; a dielectric support pedestal; a sub-reflector connected to an upper part of the dielectric support pedestal; and a waveguide connected to a lower part of the dielectric support pedestal, wherein the parabolic reflector has a curved surface in which a ratio of a focal length to a diameter is greater than a preset value, and at least one corrugation configured to suppress a cross polarization is formed in a region of the dielectric support pedestal.

Antenna apparatus

According to the present disclosure, an antenna apparatus which includes a hollow pillar shaped waveguide extending in a first direction and at least one ridge protruding from an inner circumferential surface of the waveguide and extending in the first direction, wherein the ridge has at least one recessed groove formed in the first direction; and an antenna apparatus which includes the waveguide, the ridge and the iris structure protruding from the inner circumferential surface of the waveguide along a plane intersecting the first direction, are provided.

The embodiments generally relate to an antenna device that includes a cover having a specific shape to suppress a sidelobe of an elevation angle gain pattern which is caused by a radio-frequency (RF) device regardless of an avoidance area.

Antenna device for suppressing sidelobe

An antenna system for triple-band satellite communication according to one exemplary embodiment of the present disclosure includes a feed horn device that is configured to simultaneously radiate or absorb wireless signals of triple bands including X, Ku and Ka bands, and a waveguide section that is coupled to the feed horn device and configured to transmit input and output of the wireless signals, wherein the feed horn device includes a corrugation horn that is configured to radiate or absorb the wireless signals of the X and Ku bands, the corrugation horn having a bell-like shape with a plurality of corrugations formed on an inner circumferential surface thereof in a stepped manner, and a dielectric feed horn that is configured to radiate or absorb the wireless signal corresponding to the Ku band and disposed in a central region of the corrugation horn.

Antenna system for simultaneous triple-band satellite communication

Disclosed are an apparatus and method for computing a vehicle path by considering satellite communication channel states. The method includes: searching for a plurality of candidate paths, each path connected from a starting point to a destination; analyzing a satellite communication channel state with respect to each of the candidate paths, based on a receiving sensitivity of an electric wave received from a satellite; setting one of the candidate paths as a first path, based on the analyzed satellite communication channel states; and mapping the first path onto a map, and displaying the first path on a display unit.

Growing community of inventors

Daejeon, South Korea

Kun Sup Kwon