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:
Aug. 11, 1981
Filed:
Mar. 19, 1979
Michael J Underhill, Faygate, GB;
Peter A Lewis, Brighton, GB;
U.S. Philips Corporation, New York, NY (US);
Abstract
A method and apparatus for deriving radio-frequency impedance information of an electrical network, for example, an aerial, by using a current converter for inducing a radio-frequency current into the network and a voltage converter for impressing a radio-frequency voltage on the network. By applying radio-frequency signals to the converters, the resultant signals present in the network may be detected by connecting a radio receiver to the network, from which detected signals the impedance may be derived. By directly connecting the radio receiver to the network, the radio-frequency energy applied to the network by the converters may be kept very small.