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:
Jul. 23, 1985
Filed:
Dec. 08, 1982
Hiroyuki Ishihara, Tokyo, JP;
Nippon Electric Co., Ltd., Tokyo, JP;
Abstract
A microwave integrated circuit frequency converter includes a first filter (30) for a signal frequency and a second filter (32) for a local oscillator frequency connected at one terminal thereof with one terminal of the signal frequency filter (30) by a line (38), (40) having a predetermined electrical length. A parallel stub line (42) is short-circuited at one end thereof. A diode (34) is connected at its one end to a third filter (36) which is adapted to reflect the signal and local oscillator frequencies while passing an intermediate frequency. The diode (34) is connected at the other end to a line (41). The parallel stub line (42) and line (41) are connected at their other ends to a specific junction P on the connecting line (38), (40) at which the impedance is open circuited for the signal frequency when the local oscillator frequency filter (32) is seen from the signal frequency filter (30) side and the impedance is open circuited for the local oscillator frequency when the signal frequency filter (30) is seen from the local oscillator frequency filter (32) side.