Directional notch filter for simultaneous transmit and receive of wideband signals
US8942658B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2011 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Jan 16, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/58
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A directional notch filter for simultaneous transmit and receive of wideband signals comprises an antenna, an antenna match, a receiver, a power combiner, a first directional coupler, a second directional coupler and a shaping filter accepting a signal and producing a compensation signal as a replica of an antenna reflection transfer function, wherein the first and second directional couplers produce signals and portions of signals received by the antenna and sent to the receiver via the power combiner. The receiver can produce a receiver signal and the first directional coupler can produce a first signal as a portion of an overall signal received by the antenna, the first signal comprising at least reflection of a signal from the power amplifier and the second directional coupler samples a small portion of the receiver signal, said second directional coupler producing a second signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.