Microwave integrated circuit mixer
US4450584A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1982 |
| Grant date | May 22, 1984 |
| Priority date | — |
| Expiry date | Jun 25, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/0037
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a mixer using a planar circuit such as a strip line or a microstrip line etc., an IF signal interruption circuit which passes an RF signal but exhibits an open-circuit impedance against an IF signal is provided in shunt with a main line on which the RF signal propagates toward a mixer diode, and a low-pass filter is connected in the vicinity of the IF signal interruption circuit in order to short-circuit a mount point of the diode for the IF signal by high frequency short-circuiting technique wherein an open-ended quarter-wavelength transmission line or a short-circuited half-wavelength transmission line is used, whereby low noise performance can be obtained over a wide frequency band even under such an operating condition that the IF signal is in the GHz band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.