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 electronic device, comprising:
- an antenna;
- a transmitter port configured to provide a transmission signal from transmitting circuitry;
- a receiver port configured to provide a reception signal to receiving circuitry;
- and
- a duplexer comprising
- a first set of impedance gradients and impedance tuners configured to couple and uncouple the transmitter port to and from the antenna, the first set of impedance gradients and impedance tuners having a first impedance gradient, a second impedance gradient, a first impedance tuner, and a second impedance tuner, wherein
- the first impedance gradient, the first impedance tuner, and the antenna are coupled at a first node,
- the second impedance gradient, the first impedance tuner, and the transmitter port are coupled at a second node,
- the first impedance gradient, the second impedance tuner, and the transmitter port are coupled at a third node, and
- the second impedance gradient and the second impedance tuner are coupled at a fourth node, and
- a second set of impedance gradients and impedance tuners configured to couple and uncouple the receiver port to and from the antenna, the second set of impedance gradients and impedance tuners having a third impedance gradient, a fourth impedance gradient, a third impedance tuner, and a fourth impedance tuner, wherein
- the third impedance gradient, the third impedance tuner, and the fourth node are coupled at a fifth node,
- the fourth impedance gradient, the third impedance tuner, and the receiver port are coupled at a sixth node,
- the third impedance gradient, the fourth impedance tuner, and the receiver port are coupled at a seventh node, and
- the fourth impedance gradient, the fourth impedance tuner, and a ground terminal are coupled at an eighth node.
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:
- setting, via one or more processors, first and second impedance devices of a receiver bridge to a first impedance state of a plurality of impedance states;
- setting, via the one or more processors, third and fourth impedance devices of the receiver bridge to balance the receiver bridge;
- setting, via the one or more processors, fifth and sixth impedance devices of a transmitter bridge to a second impedance state of the plurality of impedance states;
- setting, via the one or more processors, seventh and eighth impedance devices of the transmitter bridge to unbalance the transmitter bridge;
- and
- transmitting, via the one or more processors, an outgoing signal from a transmitter port of the transmitter bridge.
Dependencies are inferred from the claim text.