Antenna system with antenna swapping and antenna tuning
First Claim
1. An electronic device, comprising:
- a housing having conductive structures that form an antenna ground and having peripheral conductive housing structures that run around at least four edges of the housing;
a loop antenna that is formed from the antenna ground and a first segment of the peripheral conductive housing structures;
an inverted-F antenna that is formed form the antenna ground and a second segment of the peripheral conductive housing structures;
radio-frequency transceiver circuitry having first and second ports;
switching circuitry that is operable in a first mode in which the loop antenna is coupled to the first port and the inverted-F antenna is coupled to the second port and that is operable in a second mode in which the loop antenna is coupled to the second port and the inverted-F antenna is coupled to the first port, wherein the radio-frequency transceiver circuitry is configured to;
transmit and receive radio-frequency signals through the loop antenna in a plurality of cellular telephone communications bands during the first mode; and
only receive radio-frequency signals through the inverted-F antenna in a subset of the plurality of cellular telephone communications bands during the first mode.
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Abstract
Electronic devices may be provided that contain wireless communications circuitry. The wireless communications circuitry may include radio-frequency transceiver circuitry and first and second antennas. An electronic device may include a housing. The first antenna may be located at an upper end of the housing and the second antenna may be located at a lower end of the housing. A peripheral conductive member may run around the edges of the housing and may be used in forming the first and second antennas. The radio-frequency transceiver circuitry may have a transmit-receive port and a receive port. Switching circuitry may connect the first antenna to the transmit-receive port and the second antenna to the receiver port or may connect the first antenna to the receive port and the second antenna to the transmit-receive port.
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Citations
20 Claims
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1. An electronic device, comprising:
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a housing having conductive structures that form an antenna ground and having peripheral conductive housing structures that run around at least four edges of the housing; a loop antenna that is formed from the antenna ground and a first segment of the peripheral conductive housing structures; an inverted-F antenna that is formed form the antenna ground and a second segment of the peripheral conductive housing structures; radio-frequency transceiver circuitry having first and second ports; switching circuitry that is operable in a first mode in which the loop antenna is coupled to the first port and the inverted-F antenna is coupled to the second port and that is operable in a second mode in which the loop antenna is coupled to the second port and the inverted-F antenna is coupled to the first port, wherein the radio-frequency transceiver circuitry is configured to; transmit and receive radio-frequency signals through the loop antenna in a plurality of cellular telephone communications bands during the first mode; and only receive radio-frequency signals through the inverted-F antenna in a subset of the plurality of cellular telephone communications bands during the first mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electronic device, comprising:
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a housing having an upper end and a lower end; peripheral conductive structures that run around a periphery of the housing; an upper cellular telephone antenna that is formed at least partly from the peripheral conductive member and that is located at the upper end of the housing; a lower cellular telephone antenna that is formed at least partly from the peripheral conductive member and that is located at the lower end of the housing; radio-frequency transceiver circuitry including a transmitter and first and second receivers; and switching circuitry that has a first port that receives signals from the transmitter and provides signals to the first receiver, a second port that is coupled to the lower cellular telephone antenna, a third port that provides signals to the second receiver, and a fourth port that is coupled to the upper cellular telephone antenna, wherein; the switching circuitry is operable in a first state in which the first port is connected to the second port and the third port is connected to the fourth port and is operable in a second state in which the first port is connected to the fourth port and the third port is connected to the second port; and when the switching circuitry is in the first state, the upper cellular telephone antenna receives signals in a cellular telephone communications band but does not transmit any signals. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An electronic device, comprising:
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a housing having opposing first and second ends and four edges; a display mounted within the housing; a peripheral conductive member that runs along the four edges of the housing; an antenna ground that is formed at least partly from conductive portions of the housing; a first antenna that is formed from at least a first segment of the peripheral conductive member and the antenna ground; a second antenna that is formed from at least a second segment of the peripheral conductive member and the antenna ground; radio-frequency transceiver circuitry having a transmit-receive port and a receive-only port; and switching circuitry that is operable in a first mode in which the first antenna is coupled to the transmit-receive port and the second antenna is coupled to the receive-only port and that is operable in a second mode in which the first antenna is coupled to the receive-only port and the second antenna is coupled to the transmit-receive port, wherein the second antenna is connected only to a receiver in the radio-frequency transceiver circuitry that receives signals in a cellular telephone communications band when the switching circuitry is in the first mode. - View Dependent Claims (18, 19, 20)
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Specification