Telecommunications – Receiver or analog modulated signal frequency converter – Measuring or testing of receiver
Patent
1979-03-19
1981-08-11
Bookbinder, Marc E.
Telecommunications
Receiver or analog modulated signal frequency converter
Measuring or testing of receiver
324 57R, 324 58A, H04B 1700, G01R 2708, G01R 2716
Patent
active
042837944
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.
REFERENCES:
patent: 3179881 (1965-04-01), Ichijo
patent: 3218549 (1965-11-01), Tsuchiya
patent: 3596175 (1971-07-01), Alford
patent: 3919644 (1975-11-01), Smolka
patent: 4156842 (1979-05-01), Huang et al.
Lewis Peter A.
Underhill Michael J.
Bookbinder Marc E.
Briody Thomas A.
Goodman Edward W.
Streeter William J.
U.S. Philips Corporation
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