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US 2010/0074240 A1Published application
Duplexer/Multiplexer Having Filters that Include at Least One Band Reject Filter
AssigneeNortel Networks Limited
InventorsChun-Yun Jian, Eric Gagnon, Lan Hu
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Abstract
A wireless communications device includes an antenna, a multi-port path selection structure having an antenna port connected to the antenna, and plural ports connected to respective one or more receive and transmit paths of the wireless communications device. The multi-port path selection structure has a transmit band reject filter connected to the transmit path and a second filter connected to the receive path.
Claims21
A wireless communications device comprising:
- an antenna;
- a multi-port path selection structure having an antenna port connected to the antenna, and plural ports connected to respective one or more receive and transmit paths of the wireless communications device,
- wherein the multi-port path selection structure has a transmit band reject filter connected to the transmit path and a second filter connected to the receive path.
A wireless communications device comprising:
- an antenna;
- a multiplexer having an antenna port connected to the antenna, at least one receive port connected to at least one receive path of the wireless communications device, and at least one transmit port connected to at least one transmit path of the wireless communications device,
- wherein the multiplexer has a transmit band reject filter connected to the transmit port and a second filter connected to the receive port.
A method of enabling wireless communications, comprising:
- providing an antenna at a wireless communications device;
- providing a multi-port path selection structure having an antenna port connected to the antenna, and transmit and receive ports connected to respective transmit and receive paths of the wireless communications device;
- providing a transmit band reject filter to provide a reject band for the transmit port;
- and
- providing a second filter connected to the receive port.
2 more elements
Dependencies are inferred from the claim text.