Integrated circuit, image and sum enhanced balanced mixer
US3939430A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1974 |
| Grant date | Feb 17, 1976 |
| Priority date | — |
| Expiry date | Jun 24, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/0037
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A balanced microwave diode mixing circuit utilizes the junction of a slot transmission line and a coplanar strip transmission line as the point of diode modulation to provide heterodyne mixing. By the use of slot line type elements formed on one side of a dielectric substrate and strip line type elements formed on the other side, the following features are achieved: (A) input of the local oscillator (LO) signal and output of the intermediate frequency (I.F.) signal are achieved through a common coupling to and from the coplanar strip line at the end of the latter which is remote from the hybrid junction; (B) low reactance at the "sum frequency" is presented at the hybrid junction; (C) low reactance at the image frequency is presented at the hybrid junction; and (D) high impedance at the input signal frequency is presented at the hybrid junction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.