公开(公告)号：US11953535B2

公开(公告)日：2024-04-09

申请号：US17260825

申请日：2019-07-17

Applicant: TEKNOLOGIAN TUTKIMUSKESKUS VTT OY

Inventor： Mikko Varonen ,  Henrik Forsten ,  Jan Saijets

IPC: G01R29/08 ,  G01R35/00 ,  H03B29/00 ,  H03F1/22 ,  H03F3/19 ,  H03F3/72

CPC classification number: G01R29/0878 ,  G01R35/005 ,  H03B29/00 ,  H03F1/22 ,  H03F3/19 ,  H03F3/72 ,  H03F2200/207 ,  H03F2200/451

Abstract: An active noise source apparatus includes a pair of a first and second switched-biased noise amplifier branches (22, 23). A directional coupler (24) having a pair of input ports (3, 4) connected to combine the noise outputs from the first and second switched-biased noise amplifiers. One output port (4) of the directional coupler (24) is connected to a matched termination (Rtermination) and another output port (2) of the directional coupler (24) is connected to an output (25) of the active noise source.

公开(公告)号：US20240264272A1

公开(公告)日：2024-08-08

申请号：US18290156

申请日：2022-05-05

Applicant: Teknologian tutkimuskeskus VTT Oy

Inventor： Tero Kiuru ,  Otto Korkalo ,  Henrik Forsten ,  Pekka Pursula ,  Paul Kemppi ,  Ossi Arasalo

IPC: G01S7/35 ,  G01S7/41 ,  G01S13/89 ,  G01S17/32

CPC classification number: G01S7/356 ,  G01S7/415 ,  G01S13/89 ,  G01S17/32

Abstract: According to an example aspect of the present invention, there is provided a method comprising, determining an initial set of measurement results, wherein said initial set of measurements results comprises at least angles-of-arrivals and phases of initial reflected signals, the initial reflected signals being reflections of initial signals transmitted by a radar in a field of view of the radar, determining a phase map of the field of view of the radar, wherein the phase map comprises at least phase differences between the initial transmitted signals and the initial reflected signals as a function of said angles-of-arrivals of the initial reflected signals and determining a vibration map of the field of view of the radar based at least on the phase map.