Telefrontier Co., Ltd

Cooljamm Company

Jiho Ahn

Elena V Frolova

Ji Eun Park

Keehwan Ka

Yeonju Kang

Alexander Venetskiy

Provided is a method of providing a melody recording based on a user humming melody in a user device. The method includes displaying a record button to be used to start recording of a humming melody of a user in response to an input of the user, and measuring a pitch of a sound that changes over time based on the humming melody of the user, and displaying a change in the pitch in real time. A region in which the change in the pitch is displayed includes at least a portion of a left region of a screen of the user device.

Method for providing a melody recording based on user humming melody and apparatus for the same

The antenna comprises main and sub reflectors, each of which being made with nonaxisymmetric curvilinear surfaces and having two planes of symmetry at the intersection. A feed is arranged between the main and sub reflectors and capable of illuminating, first, the sub-reflector and, through it, the main reflector to form plane wave front. The common focuses of the nonaxisymmetric curvilinear surfaces of the reflectors in all sections passing through the longitudinal axis Z of the antenna, is located at the portion Zof Z, wherein the length of said portion being restricted by limits F&#x2266;Z&#x2266;F, where F, Fare the minimum and maximum distances from the ends of the portion Zto the main reflector along Z. The length of Zsatisfies the following relation; F/D&#x2266;Z/D&#x2266;F/Dand 0.21&#x2266;Z/D&#x2266;0.47, 1&#x3e;D/D&#x3e;0.5, where Dand Dare the maximum and minimum transverse sizes of the main reflector aperture.

Compact asymmetrical double-reflector antenna

The inventive device enables to ensure its compactness, that is, a minimum thickness at a high antenna efficiency of an antenna in the frequency range 10.7-12.75 GHz. This technical effect can be achieved because the antenna comprises a main reflector (), at least two feeds () and at least two sub-reflectors (). Each sub-reflector is provided with such a shape of its external surface that ensures reflection of the feed directional pattern central beam to the edge of the main reflector and reflection of a lateral beam to the central area of the main reflector, the sub-reflector adjoining surfaces being truncated.

Growing community of inventors

Seoul, South Korea

Jiho Ahn