Electronic device having adaptive filter circuitry for blocking interference between wireless transceivers
First Claim
1. An electronic device, comprising:
- control circuitry;
antenna structures comprising first and second antennas;
an electrical component comprising a switch having first, second, third, and fourth ports;
radio-frequency transceiver circuitry that is coupled to the antenna structures through the electrical component, wherein the radio-frequency transceiver circuitry includes a transmitter that transmits radio-frequency signals and a receiver; and
adjustable filter circuitry interposed between the electrical component and the antenna structures, wherein the first and second ports are coupled to the radio-frequency transceiver circuitry, the third port is coupled to the first antenna through a first portion of the adjustable filter circuitry, the fourth port is coupled to the second antenna through a second portion of the adjustable filter circuitry, and the adjustable filter circuitry is configured by the control circuitry to allow the radio-frequency signals from the transmitter to pass to the antenna structures while blocking interference from harmonics that are produced while the radio-frequency signals from the transmitter circuitry pass through the electrical component.
1 Assignment
0 Petitions
Accused Products
Abstract
An electronic device may include radio-frequency transceiver circuitry and antenna structures. The radio-frequency transceiver circuitry may transmit signals for the antenna structures that pass through electrical components such as switches. Harmonics of the transmitted signals may be generated as the signals pass through the electrical components. To reduce interference that might otherwise adversely affect sensitive receiver circuitry in the electronic device, adjustable filter circuitry may be interposed between the electrical components and the antenna structures. Control signals may adjust the adjustable circuitry in real time during operation of an electronic device to ensure that transmitted signals can pass through the adjustable filter circuitry while blocking the harmonic signals.
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Citations
20 Claims
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1. An electronic device, comprising:
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control circuitry; antenna structures comprising first and second antennas; an electrical component comprising a switch having first, second, third, and fourth ports; radio-frequency transceiver circuitry that is coupled to the antenna structures through the electrical component, wherein the radio-frequency transceiver circuitry includes a transmitter that transmits radio-frequency signals and a receiver; and adjustable filter circuitry interposed between the electrical component and the antenna structures, wherein the first and second ports are coupled to the radio-frequency transceiver circuitry, the third port is coupled to the first antenna through a first portion of the adjustable filter circuitry, the fourth port is coupled to the second antenna through a second portion of the adjustable filter circuitry, and the adjustable filter circuitry is configured by the control circuitry to allow the radio-frequency signals from the transmitter to pass to the antenna structures while blocking interference from harmonics that are produced while the radio-frequency signals from the transmitter circuitry pass through the electrical component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An electronic device, comprising:
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a cellular telephone transmitter that transmits signals; a receiver; antenna structures comprising first and second antennas that are coupled to the cellular telephone transmitter and the receiver, wherein the cellular telephone transmitter and the receiver are formed within a radio-frequency transceiver; a switch through which the transmitted signals pass, wherein harmonics of the transmitted signals are generated when the transmitted signals pass through the switch; and adjustable low pass filter circuitry between the switch and the antenna structures, wherein the adjustable low pass filter circuitry is configured to allow the transmitted signals to pass from the switch to the antenna structures and is configured to block the harmonics to prevent the harmonics from interfering with the receiver, the switch has first, second, third, and fourth ports, the first and second ports are coupled to the radio-frequency transceiver, the third port is coupled to the first antenna through a first portion of the adjustable low pass filter circuitry, and the fourth port is coupled to the second antenna through a second portion of the adjustable low pass filter circuitry. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An electronic device, comprising:
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control circuitry; antenna structures; an electrical component; radio-frequency transceiver circuitry that is coupled to the antenna structures through the electrical component, wherein the radio-frequency transceiver circuitry includes a transmitter that transmits radio-frequency signals and a receiver; and adjustable filter circuitry interposed between the electrical component and the antenna structures, wherein the adjustable filter circuitry comprises at least one adjustable capacitor circuit, the electrical component comprises a switch having a plurality of ports coupled to the radio-frequency transceiver circuitry, the antenna structures comprise first and second antennas, and the switch comprises a first port coupled to the first antenna through a first portion of the adjustable filter circuitry and a second port coupled to the second antenna through a second portion of the adjustable filter circuitry.
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Specification