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公开(公告)号：US09819089B2
公开(公告)日：2017-11-14
申请号：US14936843
申请日：2015-11-10
Inventor： Dae Heon Lee , Woong Hee Kim , Dong Hoon Shin , Jinchun Wang , Inho Hwang , Sangwoo Park , Gangil Byun , Hosung Choo
CPC classification number: H01Q9/0428 , H01Q21/22
Abstract: A circularly polarized Global Positioning System (GPS) antenna using parasitic lines, in which circular polarization is implemented to improve the efficiency of the reception of satellite signals by an antenna. For this, a circularly polarized GPS antenna using parasitic lines according to an embodiment includes a substrate, a radiating patch formed on a top of the substrate, a parasitic line part formed on the top of the substrate and disposed to be spaced apart from the radiating patch, thus implementing circular polarization characteristics by inducing reverse current, a ground plate formed on a bottom of the substrate, and a feeding via formed through the substrate and configured to electrically connect the ground plate to the radiating patch.
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公开(公告)号：US09985348B2
公开(公告)日：2018-05-29
申请号：US14833054
申请日：2015-08-22
Inventor： Dae Heon Lee , Woong Hee Kim , Dong Hoon Shin , Jinchun Wang , Inho Hwang , Sangwoo Park
CPC classification number: H01Q1/48 , H01Q9/0407
Abstract: Disclosed herein is a controlled reception pattern antenna that prevents the degradation of anti-jamming performance in a compact array antenna by increasing the antenna gain at a low elevation angle. The proposed antenna includes a radiator for receiving a satellite signal, a ground platform in which the radiator is arranged, and a radiating slot formed in the ground platform. By simply forming a radiating slot in the ground platform, antenna gain may be increased at a low elevation angle. Therefore, it is possible to maintain anti-jamming performance and to reduce the size of the array antenna.
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公开(公告)号：US09778367B2
公开(公告)日：2017-10-03
申请号：US14284955
申请日：2014-05-22
Inventor： Jinchun Wang , Dae Heon Lee , Dong Hoon Shin , Woong Hee Kim , Hae Yong Yang , Eungki Park
Abstract: An anti-jamming apparatus and method for a compact array antenna are provided. The anti-jamming apparatus for a compact array antenna includes a Global Navigation Satellite System (GNSS) array antenna unit including a plurality of GNSS antennas for receiving GNSS signals transmitted from a satellite. A first beam-forming unit includes a plurality of combination units for receiving respective signals received by the plurality of GNSS antennas as a first reference signal and first auxiliary signals and combining the first reference signal with the first auxiliary signals, thus forming different beams. A second beam-forming unit receives signals of the different beams, and combining the signals of the different beams, thus forming an anti-jamming beam in which an invisible area is minimized.
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公开(公告)号：US09658340B2
公开(公告)日：2017-05-23
申请号：US14468784
申请日：2014-08-26
Inventor： Dong Hoon Shin , Woong Hee Kim , Jinchun Wang , Dae Heon Lee , Hae Yong Yang , Inho Hwang , Chun Soo Kim
Abstract: A method and apparatus for measuring the synthetic reception pattern of an adaptive array antenna, which are divided into a hardware apparatus and a measurement method. The hardware apparatus includes a wavefront simulator, a GNSS simulator, an external controller, a signal measurement unit, and a GNSS receiver. The measurement method using the hardware apparatus includes setting a direction of arrival of jamming and calculating a weight vector, fixing weight vectors at the calculated weight vector and collecting outputs of an array antenna system for all test signals, and displaying the collected data on a grid of a 2D plane. In accordance with the present invention, a weight vector calculated under a specific jamming situation is maintained for all test signals, so that the synthetic reception pattern of the array antenna system can be measured.
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