Signal processing circuit, signal processing module, and communication apparatus
US10276911B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2016 |
| Grant date | Apr 30, 2019 |
| Priority date | — |
| Expiry date | May 14, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/48
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In one example, a signal processing circuit including a directional coupler and a termination part is disclosed. The directional coupler includes a main line as a transmission path of an RF signal and a sub-line constituting a coupled line together with the main line. The termination part includes devices connectable between ground and a first port at an end of the sub-line. The signal processing circuit switches, depending on a frequency of the RF signal, the devices of the termination part to be connected to the first port. The phase of a return signal of a signal input as a coupling signal to the termination part via the first port is opposite to the phase of an isolation signal supplied to a second port at the other end of the sub-line and connected to an output port of the coupling signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.