27-04-2016 дата публикации
Номер: KR1020160045650A
Принадлежит:
The present invention relates to a feeding structure of a quadrifilar helix antenna which is installed in a mobile terminal for satellite communication. The output of a feeding unit is fed and has a phase difference of 90° in order to feed four radiation elements wherein each of the radiation element has a successive phase of 0°, -90°, -180° and -270° or -270°, -180°, -90° and 0°, respectively, to achieve characteristics of left hand circular polarization (LHCP) or right hand circular polarization (RHCP), which are circular polarization. In addition, a size of the feeding unit should be small-sized having a diameter of 12 mm or less considering the structure of the mobile terminal for satellite communication, the feeding structure includes a subminiature 90° directional coupler with a size of 2.0 × 1.25 × 0.7 mm^3, a π-type phase lag network and a low pass filter (LPF). The present invention has effects of increasing antenna productivity, reducing the height of the feeding unit to one-third ...
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