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. 04, 1983
Filed:
Aug. 24, 1981
Yoshihiko Yoshikawa, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An angular error detecting device in which all components of arriving polarized waves are obtained independent of the type and amount of polarization. A higher mode detector outputs two higher mode components which are in orthogonal relation. These two components are combined so as to maintain the orthogonal relation. A circuit is provided having a set of at least one 90.degree. phase difference plate and one 180.degree. phase difference plate which have rotatable phase lag surfaces and which are cascade-connected. The 90.degree. phase difference plate is provided on the side of the circuit combining the two higher order components. The output of the 180.degree. phase difference plate is divided into first and second orthogonal polarization components. The first polarization component is synchronously detected with a local oscillator output synchronous with reference signals to provide a first angular error output while the output of the second polarization component is synchronously detected with signals shifted 90.degree. in phase from the local oscillator output to thereby provide a second angular error output orthogonal to the first angular error output.