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US 2010/0246454 A1Published application
Novel transmit/receive balun structure
AssigneeQuantenna Communications, Inc.
InventorsSaied Ansari, Thai Nguyen
Life of this patent
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Abstract
A technique for efficient balun duplexing includes providing a switchless path through a balun. In a receive mode, a transmit path is blocked and signal is directed along a switchless receive path. In a transmit mode, a receive path is blocked and signal is directed along a switchless transmit path.
Claims20
A device including a balun comprising:
- a common port;
- a first common transmission line operationally connected to the common port;
- a first receive (RX) transmission line coupled to the first common transmission line;
- a first transmit (TX) transmission line coupled to the first common transmission line;
- a positive RX port operationally connected to the first RX transmission line;
- a positive TX port operationally connected to the first TX transmission line;
- a second common transmission line operationally connected to the first common transmission line;
- a second RX transmission line coupled to the second common transmission line;
- a second TX transmission line coupled to the second common transmission line;
- a negative RX port operationally connected to the second RX transmission line;
- a negative TX port operationally connected to the second TX transmission line;
- an RX switching module operationally connected to the positive RX port and the negative RX port;
- a TX switching module operationally connected to the positive TX port and the negative TX port;
- wherein, in operation,
- in a receive state the RX switching module is open and the TX switching module is closed, the TX transmission lines present a high impedance load, and signal entering the common port will induce current in the RX transmission lines;
- in a transmit state the TX switching module is open and the RX switching module is closed, the RX transmission lines present a high impedance load, and signal entering the common port will induce current in the TX transmission lines.
13 more elements
A system comprising:
- an antenna;
- a transmit/receive (TX/RX) duplexing balun coupled to the antenna;
- a transmitter coupled to the TX/RX duplexing balun;
- a receiver coupled to the TX/RX duplexing balun;
- a TX/RX duplexing control circuit coupled to the TX/RX duplexing balun;
- wherein, in operation,
- in a receive mode, the TX/RX duplexing control circuit sets the TX/RX duplexing balun to an RX state, a first radio frequency (RF) signal is received on the antenna, the first RF signal is directed through the TX/RX duplexing balun to the receiver;
- in a transmit mode, the TX/RX duplexing control circuit sets the TX/RX duplexing balun to a TX state, a second RF signal is presented at the transmitter, the second RF signal is directed through the TX/RX duplexing balun to the antenna.
5 more elements
A method comprising:
- blocking a transmit port;
- presenting a signal to a common port;
- directing the signal to a receive port;
- wherein, the signal is directed to the receive port without passing through a switch.
1 more element
Dependencies are inferred from the claim text.