Bias adjustment of radio frequency unit in radar apparatus

Details Bias adjustment of radio frequency unit in radar apparatus Bias adjustment of radio frequency unit in radar apparatus

2008-09-10

2010-10-26

Tarcza, Thomas H (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

C342S174000, C342S195000

Reexamination Certificate

active

07821447

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.

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