Mar 24, 2026

US12586921 - Antenna array, artifical target system, method and computer program

According to an example aspect of the present invention, there is provided an antenna array arranged to control a radar response of a target, comprising multiple ultra wideband antennas, wherein each of said multiple antennas is coupled to a separate switch, and each switch is arranged to control one of said multiple antennas such that when said one antenna is connected to a load, preferably matched load, said one antenna acts as an absorber, and when said one antenna is electrically shorted, said one antenna acts as a reflector, wherein at least one of said multiple antennas is arranged to be electrically shorted at a first time instant and the at least one of said multiple antennas is arranged to be connected to a load, preferably matched load, at a second time instant, and at least one other of said multiple antennas is arranged to be connected to a load, preferably matched load, at the first time instant and the at least one other of said multiple antennas is arranged to be electrically shorted at the second time instant.

Assignee: Teknologian tutkimuskeskus VTT Oy
Inventors: Terho Kololuoma, Arttu Huttunen, Antti Tanskanen
Filing date: 2022-06-15

This patent describes an antenna array designed to control the radar response of a target using multiple ultra wideband antennas, each connected to a switch that allows them to function as either absorbers or reflectors. The system enables the antennas to alternate between these functions at different time intervals, providing distinct radar responses at varying frequencies.

Claim 1

1 . An antenna array arranged to control a radar response of a target, comprising: multiple ultra wideband antennas, wherein each of said multiple antennas is coupled to a separate switch, and each switch is arranged to control one of said multiple antennas such that when said one antenna is connected to a load, said one antenna acts as an absorber, and when said one antenna is electrically shorted, said one antenna acts as a reflector, wherein each switch is arranged to enable use in various applications, wherein at least one of said multiple antennas is arranged to be electrically shorted at a first time instant and the at least one of said multiple antennas is arranged to be connected to a load at a second time instant, and at least one other of said multiple antennas is arranged to be connected to a load at the first time instant and the at least one other of said multiple antennas is arranged to be electrically shorted at the second time instant, and wherein the antenna array is arranged to provide a first radar response operating on a first frequency at the first time instant and a second radar response operating on a second frequency at the second time instant, the first radar response and the second radar response being different, and the first frequency and second frequency being different. multiple ultra wideband antennas, wherein each of said multiple antennas is coupled to a separate switch, and each switch is arranged to control one of said multiple antennas such that when said one antenna is connected to a load, said one antenna acts as an absorber, and when said one antenna is electrically shorted, said one antenna acts as a reflector, wherein each switch is arranged to enable use in various applications, wherein at least one of said multiple antennas is arranged to be electrically shorted at a first time instant and the at least one of said multiple antennas is arranged to be connected to a load at a second time instant, and at least one other of said multiple antennas is arranged to be connected to a load at the first time instant and the at least one other of said multiple antennas is arranged to be electrically shorted at the second time instant, and wherein the antenna array is arranged to provide a first radar response operating on a first frequency at the first time instant and a second radar response operating on a second frequency at the second time instant, the first radar response and the second radar response being different, and the first frequency and second frequency being different.

Google Patents

https://patents.google.com/patent/US12586921

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12586921