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:
Oct. 26, 2010
Filed:
Sep. 10, 2008
Kenji Oka, Kobe, JP;
Hiroshi Ito, Kobe, JP;
Jun Ito, Kobe, JP;
Fujitsu Ten Limited, Kobe-shi, JP;
Abstract
Disclosed is a method of bias adjustment for a millimeter wave radar apparatus that can efficiently and highly accurately adjust the bias of an MMIC used in a radio frequency circuit in the millimeter wave radar apparatus. The method comprises: providing a DA converter in a bias circuit in the millimeter wave radar apparatus comprising an antenna, a radio frequency unit, and a processing unit for performing transmission and reception processing of the radio frequency unit; connecting a signal generator in place of the antenna; and connecting a test processing unit and a control apparatus to the radio frequency unit, wherein the control apparatus applies an initial bias value in the form of a digital value to the MMIC, calculates the target value for the digital bias value based on the result of the measurement of the received signal, and takes the target value as the digital bias value for the production processing unit when the radio frequency characteristic of the received signal obtained by applying the target value to the MMIC lies within specified limits.