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:
Jan. 31, 1984
Filed:
Jul. 11, 1980
Robert L Hooper, Ocala, FL (US);
Microdyne Corporation, Ocala, FL (US);
Abstract
A low cost, frequency agile receiver for earth satellite ground stations provides selection of any one of 24 channels available from an RCA synchronous orbit satellite. The tuner of the receiver utilizes mass produced elements including CB synthesizer, divider and PROM chips to control the frequency of a conventional VCO operating at about 500 MHz. Multiplication of the VCO frequency by conventional techniques and in addition the use of a double diode sub-harmonic mixer, low beat local oscillator mixing and of the difference mixer signals (down conversion) permits reduction of 3.72 GHz to 4.18 GHz signals in two mixer stages to 70 MHz IF with sixth-sevenths of the reduction occurring in the first mixer whereby low cost printed circuit filters may be employed to eliminate problems associated with satellite transponder images and adjacent channel IF frequencies produced in the first mixer.