Duplexer with balanced impedance ladder
AssigneeApple Inc.
InventorsOliver Georg Dorn, Joonhoi Hur, Rastislav Vazny
Life of this patent
Estimating the term…
Abstract
An electrical balance duplexer has multiple impedance gradients and multiple impedance tuners. The electrical balance duplexer transmits an outgoing signal from a transmitter during a transmission mode when a first set of impedance gradients of the multiple impedance gradients is operating in a first impedance state and a first set of impedance tuners of the multiple impedance tuners is operating in a second state. The electrical balance duplexer isolates the outgoing signal from a receiver during the transmission mode when a second set of impedance gradients of the multiple impedance gradients and a second set of impedance tuners of the multiple impedance tuners are operating in the second impedance state.
Claims20
An electrical balance duplexer comprising:
- a transmitter bridge having a plurality of transmitter impedance devices and a transmitter port, the plurality of transmitter impedance devices comprising a first transmitter impedance device, a second transmitter impedance device, a third transmitter impedance device, and a fourth transmitter impedance device, the transmitter bridge configured to couple the transmitter port to an antenna during a transmission mode when a first ratio of a first impedance of the first transmitter impedance device to a second impedance of the second transmitter impedance device is different from a second ratio of a third impedance of the third transmitter impedance device to a fourth impedance of the fourth transmitter impedance device;
- and
- a receiver bridge having a plurality of receiver impedance devices and a receiver port, the plurality of receiver impedance devices comprising a first receiver impedance device, a second receiver impedance device, a third receiver impedance device, and a fourth receiver impedance device, the receiver bridge configured to uncouple the receiver port from the antenna during the transmission mode when a third ratio of a fifth impedance of the first receiver impedance device to a sixth impedance of the second receiver impedance device correlates to a fourth ratio of a seventh impedance of the third receiver impedance device to an eighth impedance of the fourth receiver impedance device.
A method for reducing insertion loss of signals while isolating transceiver ports using an electrical balance duplexer, the method comprising:
- uncoupling, via one or more processors, a receiver port of the electrical balance duplexer from one or more antennas via a plurality of receiver impedance devices of a receiver bridge during a transmission mode;
- setting coupling, via the one or more processors, a transmitter port of the electrical balance duplexer to the one or more antennas via a plurality of transmitter impedance devices of a transmitter bridge during the transmission mode;
- and
- transmitting, via the one or more processors, an outgoing signal from the transmitter port of the transmitter bridge during the transmission mode.
An electronic device,
- comprising:
- one or more antennas;
- and
- a duplexer comprising
- a transmitter bridge having a plurality of transmitter impedance devices and a transmitter port, the plurality of transmitter impedance devices configured to couple the transmitter port to the one or more antennas during a transmission mode, the transmitter port configured to provide a transmission signal from transmitting circuitry, and
- a receiver bridge having a plurality of receiver impedance devices and a receiver port, the plurality of receiver impedance devices configured to uncouple the receiver port from the one or more antennas during the transmission mode, the receiver port configured to provide a reception signal to receiving circuitry.
Dependencies are inferred from the claim text.