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:
Jun. 24, 2025
Filed:
Mar. 11, 2022
Nec Corporation, Tokyo, JP;
Shingo Yamanouchi, Tokyo, JP;
Toshiyuki Nomura, Tokyo, JP;
Masayuki Ariyoshi, Tokyo, JP;
Kazumine Ogura, Tokyo, JP;
Tatsuya Sumiya, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
For increasing measurement precision while suppressing cost increase when measuring a permittivity of an object using a radio wave, an object detection apparatus includes a transmission unit projecting a radio wave toward a target object by using a transmission antenna, a reception unit receiving the radio wave reflected by the target object by a reception antenna and generating an intermediate frequency signal, and an arithmetic apparatus. The arithmetic apparatus computes a reflection amplitude of the target object from the intermediate frequency signal, computes a reflectance from the reflection amplitude, computes a complex permittivity absolute value of the target object from the computed reflectance, computes a depth position of the target object from the reflection amplitude, computes a thickness of the target object from the depth and the reflection amplitude, and computes a permittivity of the target object from the reflection amplitude, the complex permittivity absolute value, and the thickness.