High input level microwave circuit
US4012705A · kind A · utility
3Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1975 |
| Grant date | Mar 15, 1977 |
| Priority date | — |
| Expiry date | Nov 4, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H11/04
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An active resonant circuit to be used as a cell for a low insertion loss high level microwave filter is disclosed comprising a circuit tuned at f.sub.o inductively coupled with a negative resistance amplifier consisting of a transistor with a cut-off frequency high with respect to f.sub.o , an emitter circuit coupled to said tuned circuit, with a high transformer ratio, an adjustable tuned circuit in the base of said transistor and means for biassing said transistor for maximum negative resistance at f.sub.o . Two or more cells may be associated to constitute a filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.