Broadband spiral transmission line phase shifting power splitter
US8427387B1 · kind B1 · utility
1Cited by
3References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 30, 2010 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Sep 18, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/27
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A broadband power splitter and phase shifter having a plurality of transmission lines, a 3 db, zero degree power splitter for splitting a signal, an open quadrifilar spiral for receiving a first signal and reflecting power, a modified, open quadrifilar spiral for receiving a second output after a delay and for reflecting power, and wherein a difference between the reflected power from the open quadrifilar spiral and the modified, open quadrifilar spiral in conjunction with a delay provides a constant phase shift over a broad range of frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.