Apparatus for transmit and receive switching in a time-division duplexing wireless network
US7373115B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 2005 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Jul 8, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/48
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmit-receive (T/R) switch for coupling a TDD transceiver to an antenna. The T/R switch comprises 1) a first circulator having a first port for receiving a transmit signal from the transceiver during transmit mode, a second port for sending the transmit signal to the antenna during transmit mode and receiving a received signal from the antenna during receive mode, and a third port for sending the received signal towards the transceiver during receive mode. The T/R switch further comprises 2) a second circulator having a first port for receiving the received signal from the third port of the first circulator during receive mode and a second port for sending the received signal towards the transceiver during receive mode, and 3) a termination load coupled to a third port of the second circulator. The circulators divert RF energy reflected from the antenna during transmit mode into the termination load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.