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US 9,438,288 B2Granted
System providing reduced intermodulation distortion
AssigneeAvago Technologies General IP (Singapore) Pte. Ltd.
InventorsDavid A. Feld, Bart Jansen
Life of this patent
Estimating the term…
Abstract
A system divides a signal into first and second portions and transmits the first and second portions through different signal paths between a first port and a second port. Each of the signal paths comprises an amplifier arranged in sequence with a passive device. Phase shifters may be included in each of the signal paths to produce cancellation of intermodulation products by destructive interference.
Claims20
A system, comprising:
- a first port configured to receive a transmit signal;
- a second port configured to transmit the transmit signal;
- a first transmit path configured to transmit a first portion of the transmit signal from the first port to the second port and comprising a first transmit amplifier followed by a first frequency filter;
- and
- a second transmit path configured to transmit a second portion of the transmit signal from the first port to the second port and comprising a second transmit amplifier followed by a second frequency filter, wherein the first and second frequency filters have substantially the same phase responses and amplitude responses as each other.
2 more elements
A system, comprising:
- a first port configured to receive a transmit signal;
- a second port configured to transmit the transmit signal;
- a first transmit path configured to transmit a first portion of the transmit signal from the first port to the second port and comprising a first transmit amplifier followed by a first passive device;
- and
- a second transmit path configured to transmit a second portion of the transmit signal from the first port to the second port and comprising a second transmit amplifier followed by a second passive device, wherein the first and second passive devices have substantially the same electrical characteristics as each other,
- wherein the first port is a transmit port and the second port is a transmit/receive (T/R) port, and wherein the T/R port is further configured to receive a receive signal, the system further comprising:
- a first receive path configured to transmit a first portion of the receive signal from the T/R port to a receive port and comprising a third passive device followed by a first receive amplifier;
- and
- a second receive path configured to transmit a first portion of the receive signal from the T/R port to the receive port and comprising a fourth passive device followed by a first receive amplifier, wherein the third and fourth passive devices have substantially matched electrical characteristics.
6 more elements
A method, comprising:
- dividing a transmit signal into first and second portions;
- transmitting the first portion of the transmit signal through a first transmit path arranged between a first port and a second port and comprising a first transmit amplifier followed by a first frequency filter;
- transmitting the second portion of the transmit signal through a second transmit path arranged between the first port and the second port and comprising a second transmit amplifier followed by a second frequency filter, wherein the first and second frequency filters have substantially the same phase responses and amplitude responses as each other;
- and
- combining the first and second portions of the transmit signal and transmitting a resulting signal to the second port.
2 more elements
Dependencies are inferred from the claim text.