公开(公告)号：US11133601B2

公开(公告)日：2021-09-28

申请号：US16092019

申请日：2017-04-14

Applicant: University of Florida Research Foundation, Inc. ,  Electronics and Telecommunications Research Institute (ETRI)

Inventor： Yong Kyu Yoon ,  Seahee Hwangbo ,  Hae Yong Yang

IPC: H01Q15/00 ,  H01Q13/10 ,  H01Q21/06 ,  H01Q1/48 ,  H01Q9/16 ,  H01Q1/38 ,  H01Q9/04 ,  H01Q11/10 ,  H01Q1/00 ,  H01Q3/04 ,  H01Q21/00

Abstract: Various examples are provided that are related to fractal-based reactive impedance surfaces. These surfaces allow for miniaturization of antennas. In one example, a fractal rectangular reactive impedance surface (FR-RIS) includes a plurality of fractal rectangular (FR) patches having an outer edge defined by a fractal rectangular pattern that is repeated along each side of inner FR patches of the plurality of FR patches. The fractal rectangular pattern of a FR patch matches with the fractal rectangular pattern of an adjacent FR patch. An antenna can include a planar antenna disposed over the FR-RIS.

公开(公告)号：US09778367B2

公开(公告)日：2017-10-03

申请号：US14284955

申请日：2014-05-22

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jinchun Wang ,  Dae Heon Lee ,  Dong Hoon Shin ,  Woong Hee Kim ,  Hae Yong Yang ,  Eungki Park

IPC: G01S19/21 ,  G01S19/36

CPC classification number: G01S19/21 ,  G01S19/36

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.

公开(公告)号：US09658340B2

公开(公告)日：2017-05-23

申请号：US14468784

申请日：2014-08-26

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Dong Hoon Shin ,  Woong Hee Kim ,  Jinchun Wang ,  Dae Heon Lee ,  Hae Yong Yang ,  Inho Hwang ,  Chun Soo Kim

IPC: G01S19/23 ,  G01S7/40 ,  G01S19/21 ,  G01R29/10

CPC classification number: G01S19/23 ,  G01R29/10 ,  G01S19/21

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.

公开(公告)号：US09634397B2

公开(公告)日：2017-04-25

申请号：US14550931

申请日：2014-11-22

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Dae Heon Lee ,  Hae Yong Yang

IPC: H01Q13/10 ,  H01Q13/08

CPC classification number: H01Q13/085

Abstract: An ultra-wideband tapered slot antenna that is capable of providing spatial independent band-stop characteristics which are irrelevant to the radiation direction of the antenna in a dual-stop band. The antenna includes an ultra-wideband tapered slot antenna includes a radiating unit formed on a first surface of a substrate and configured to radiate radio signals. A feeding unit is formed on a second surface of the substrate and is configured to provide the radio signals to the radiating unit. Separate stubs are formed to be spaced apart from the feeding unit around the feeding unit and are configured to reject frequencies in a first stop band from the radio signals radiated from the radiating unit. A slot is formed in a stub formed at a first end of the feeding unit and is configured to reject frequencies in a second stop band from the radio signals.