Coupling apparatus for dividing receiving and transmitting signals and control method thereof
US8412261B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 6, 2009 |
| Grant date | Apr 2, 2013 |
| Priority date | — |
| Expiry date | Nov 9, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/56
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to reducing leakage of a transmitting signal to a receiving unit in a wireless communication system with a transmitting unit and the receiving unit sharing an antenna. A coupling apparatus for dividing a radio frequency (RF) transmitting signal and an RF receiving signal in a transceiver with a transmitting unit and a receiving unit sharing an antenna, includes: a four-port circuit having port 1, port 2, port 3, and port 4, a through path being formed between the port 1 and the port 2, a first signal input to the port 1 being coupled to the port 4, a second signal input to the port 2 being coupled to the port 3, and an isolation path being formed between the port 1 and the port 4 and between the port 2 and the port 3; and an attenuator attenuating and outputting a signal output from the port 3 of the four-port circuit, and the RF transmitting signal is input to the port 1 of the four-port circuit, the RF receiving signal is input to the port 2 of the four-port circuit, and outputs of the attenuator and the port 4 of the four-port circuit are provided the receiving unit. Leakage of a transmitting signal of a transmitting unit to a receiving unit in …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.