Microstrip hybrid ring coupler
US4093928A · kind A · utility
5Cited by
2References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1976 |
| Grant date | Jun 6, 1978 |
| Priority date | — |
| Expiry date | Dec 20, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P5/225
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A microstrip hybrid ring coupler providing the same function as a convental magic Tee in waveguide or a coaxial rat-race. The ring is comprised of four equal electrical length arcs between the input-output ports. The 180.degree. phase shift is introduced in one of the four ring arcs by a tightly coupled parallel strip conductor which extends towards the interior of the ring and has an electrical length of .lambda./4 where .lambda. is the wavelength at the midband operating frequency of the coupler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.