公开(公告)号：US20230417893A1

公开(公告)日：2023-12-28

申请号：US18247868

申请日：2021-09-14

Applicant: THALES

Inventor： Pascal CORNIC ,  Yves AUDIC ,  Renan LE GALL ,  Yoan VEYRAC

IPC: G01S13/42

CPC classification number: G01S13/426 ,  G01S2013/0254

Abstract: A Doppler radar with ambiguous electronic scanning, using an active antenna comprising an array of elementary transmission antennas and an array of elementary reception antennas with the same angular opening. The arrays have the same radiation plane. The transmission array is ambiguous with a number of ambiguous lobes within said angular opening of said elementary antennas greater than or equal to 2. The reception array comprises at least one ambiguous lobe within said angular opening. The arrays are arranged so that the product of the transmission and reception radiating patterns only produces a single main beam within the field defined by said angular opening. The coverage of said angular field by said radar obtainable by:



forming at the transmission antenna radiating patterns that are focused within a field limited to the transmission ambiguity field;
simultaneously forming several reception radiating patterns focused at reception in the ambiguous transmission directions.

公开(公告)号：US20230194698A1

公开(公告)日：2023-06-22

申请号：US17920718

申请日：2021-04-16

Applicant: THALES

Inventor： Pascal CORNIC ,  Renan LE GALL ,  Yves AUDIC

IPC: G01S13/89 ,  G01S7/35 ,  G01S13/58

CPC classification number: G01S13/89 ,  G01S7/356 ,  G01S13/584 ,  G01S7/354

Abstract: An imaging method using a doppler radar wherein the pointing direction in transmission (dei) is modified from recurrence to recurrence; each detection block of duration T comprises a periodic repetition of a number C of pointing cycles, each of these cycles comprising a number P of recurrences, the set of these P recurrences covering the De pointing directions (dei) of the set; the order of the pointings is modified in a pseudo-random manner from pointing cycle to pointing cycle during a same detection block so as to create an irregular time interval between two pointings in a same direction; at least one beam is formed in reception on each recurrence in a direction included in the transmission-focused angular domain in the pointing direction corresponding to the recurrence.

公开(公告)号：US20180120427A1

公开(公告)日：2018-05-03

申请号：US15792700

申请日：2017-10-24

Applicant: THALES

Inventor： Pascal CORNIC ,  Stéphane KEMKEMIAN ,  Yves AUDIC

IPC: G01S13/34 ,  G01S7/40 ,  H01Q1/32

CPC classification number: G01S13/34 ,  G01S7/4021 ,  G01S7/4056 ,  G01S13/343 ,  G01S13/4463 ,  G01S13/931 ,  G01S2013/0245 ,  G01S2013/9375 ,  H01Q1/3233

Abstract: A radar comprises at least one array antenna composed of transmit sub-arrays and of receive sub-arrays, a transmit and receive system and processing means: the distribution of the transmit sub-arrays and receive sub-arrays is symmetric both with respect to a vertical axis and a horizontal axis; at least two transmit sub-arrays symmetric with respect to the vertical axis are the largest possible distance apart; at least two transmit sub-arrays symmetric with respect to the horizontal axis are the largest possible distance apart; at least two receive sub-arrays symmetric with respect to the vertical axis are the largest possible distance apart; at least two receive sub-arrays symmetric with respect to the horizontal axis are the largest possible distance apart; a first coding of the wave transmitted by the transmit sub-arrays carried out by frequency shifting of the ramps between the various transmit sub-arrays; a second coding of the wave transmitted by the transmit sub-arrays carried out by phase modulation from frequency ramp to frequency ramp between the various transmit sub-arrays.

公开(公告)号：US20180038950A1

公开(公告)日：2018-02-08

申请号：US15649374

申请日：2017-07-13

Applicant: THALES

Inventor： Pascal CORNIC ,  Yves AUDIC ,  Stéphane KEMKEMIAN

IPC: G01S13/60 ,  G01S13/93

CPC classification number: G01S13/60 ,  G01S13/46 ,  G01S13/931 ,  G01S2013/462 ,  G01S2013/9375

Abstract: Radar equipped with a transmission antenna array and with a reception antenna array is provided, the measurement of the height h2 is obtained by estimating the frequency of at least one time-dependent amplitude modulation produced on the reception antenna array, the modulation generated by the interference of the signals received directly from the target and the signals received after reflection on the ground, on the basis of the signals transmitted by the transmission antenna array.

公开(公告)号：US20160259048A1

公开(公告)日：2016-09-08

申请号：US15034371

申请日：2014-11-07

Applicant: THALES

Inventor： Pascal CORNIC ,  Patrick LE BIHAN ,  Yves AUDIC

IPC: G01S13/93 ,  G01S13/90

CPC classification number: G01S13/931 ,  G01S13/343 ,  G01S13/90 ,  G01S13/9047 ,  G01S2013/9335

Abstract: A radar attached laterally to airplane fuselage to detect obstacles on a collision course with a portion of the airplane facing the radar, comprises an emission antennal channel and reception antennal channels in the same plane, the form of the wave and field of angular coverage of the radar depending on the velocity of the airplane, the processing means comprising the steps: Establishing in the radar coordinate system a first distance/Doppler map allowing echoes to be separated into distance and Doppler resolution cells in a reception antennal channels; Establishing a second distance/Doppler map of smaller size by selecting a subset of distance/Doppler resolution cells corresponding to the possible positions of targets liable to collide with the wing of the airplane; Establishing new distance/Doppler maps by forming beams computationally from the subsets of distance resolution cells retained for each reception antennal channel; and Temporal integration, in each beam, of successive distance/Doppler maps.

Abstract translation: 在飞机机身侧面附近的雷达，用于检测与飞机面对雷达的部分碰撞过程中的障碍物，包括在同一平面内的发射天线通道和接收天线通道，波形和角度覆盖场的形式 雷达取决于飞机的速度，处理装置包括以下步骤：在雷达坐标系中建立允许回波被分离成接收天线通道中的距离和多普勒分辨率单元的第一距离/多普勒图; 通过选择对应于可能与飞机机翼碰撞的目标的可能位置的距离/多普勒分辨率单元的子集来建立较小尺寸的第二距离/多普勒图; 通过从为每个接收天线通道保留的距离分辨率单元的子集计算地形成光束来建立新的距离/多普勒图; 和每个波束中的时间积分，连续的距离/多普勒图。