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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：US09709657B2
公开(公告)日：2017-07-18
申请号：US14466976
申请日：2014-08-23
Inventor： YoungHyoun Kwon , JiEun Choi , HuiRae Cho , Jaeki Lee , Heesun Park , Jingak Jang , Jinhyun Kim , Jieun Kim , Inho Hwang
CPC classification number: G01S3/14
Abstract: An apparatus and method for estimating a direction of an RF signal are provided. The apparatus includes an antenna unit, a preliminary correction unit, a signal processing unit, a conversion unit, and a signal direction estimation unit. The antenna unit receives an RF signal from at least one antenna. The preliminary correction unit performs preliminary correction depending on whether the at least one antenna is an antenna having directional gain. The signal processing unit generates an analog signal by performing a frequency shift on the RF signal or a signal on which the preliminary correction has been performed. The conversion unit converts the analog signal into a digital sample. The signal direction estimation unit extracts the phase of the antenna from the digital sample, and estimates the direction of the RF signal based on the extracted phase.
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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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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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