公开(公告)号：GB2490416A

公开(公告)日：2012-10-31

申请号：GB201207300

申请日：2012-04-26

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： LEE SANG UK ,  SON SEUNG HO ,  AHN DO SEOB ,  LEE HO JIN ,  LEE KYUNG WOO

IPC: H01Q1/52 ,  H01Q1/42 ,  H01Q17/00 ,  H01Q19/10

Abstract: An antenna apparatus comprises an antenna cover 120 which includes a shielding unit 110 formed on a predetermined portion of one hemispherical surface of the antenna cover. The shielding unit 110 may be formed of electromagnetic shielding material which may reflect or absorb a jamming signal. The shielding 110 may cover a range of low angle signal reception directions relative to the antenna. The shielding 110 may be in the form of a paint applied to a surface of an antenna cover. The shielding 110 may be controlled to block certain signal directions. The shielding material may be formed on or adjacent the surface of a hemispherical, electromagnetic transparent radome. The shielding may be arranged to be rotated in a vertical and/or horizontal manner to block one or more jamming signals. Also disclosed is a method for shielding an antenna, comprising: detecting if a jamming signal is present. If a jamming signal is detected, then the shielding is rotated until the jamming signal is at a receive sensitivity or less. If no jamming signal is detected then the position of the shielding is controlled such that the shielding is located in a north direction relative to the antenna. The apparatus and method provides a simple and cheap way of avoiding jamming signals.