Asymmetric dual-band combine filter
US5543758A · kind A · utility
24Cited by
11References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 7, 1994 |
| Grant date | Aug 6, 1996 |
| Priority date | — |
| Expiry date | Oct 7, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/205
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A dual-band filter providing a bandpass characteristic over a first predetermined range of frequencies, and a notch, or band-reject characteristic over a second predetermined range of frequencies. In one embodiment, the notch characteristic occurs within the bandpass characteristic, yielding a filter frequency response with two asymmetric passbands separated by a reject band. This is particularly suited to cellular Band A receive filter applications, but the design is easily adapted to other uses. Appropriate tuning can restore symmetry to the passbands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.