The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 2022
Filed:
Dec. 21, 2020
Applicant:
Tokyo Institute of Technology, Tokyo, JP;
Inventors:
Assignee:
TOKYO INSTITUTE OF TECHNOLOGY, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01S 13/34 (2006.01); G01S 7/35 (2006.01);
U.S. Cl.
CPC ...
G01S 13/343 (2013.01); G01S 7/352 (2013.01); G01S 7/356 (2021.05);
Abstract
The present invention is the sub-carrier modulated terahertz radar that modulates a main-carrier signal in the terahertz frequency band, which is generated from a resonant tunneling diode (RTD), by a sub-carrier signal in a gigahertz frequency band whose frequency varies periodically, irradiates a frequency-modulated irradiation light to a target, detects and demodulates a reflected light from the target, mixes a demodulated signal with the sub-carrier signal, performs a Fourier transform on a mixed signal, and measures a distance from an irradiation position to the target by using a Fourier-transformed frequency signal.