Tunable dual loop antenna system
First Claim
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1. An apparatus comprising:
- a first antenna configured to be driven by a first feed;
a second antenna configured to be driven by a second feed different from and physically separated from the first feed, wherein the first antenna and the second antenna comprise a common conductor;
a variable load disposed between the first feed and the second feed and connected between the common conductor and a ground connection, wherein an impedance of the variable load is variable, and wherein an operating frequency of the first antenna and the second antenna depends on the impedance; and
a selection switch coupled to the first antenna and the second antenna, wherein the selection switch is configured to activate the first antenna and deactivate the second antenna in a first state, wherein the selection switch is configured to activate the second antenna and deactivate the first antenna in a second state, andwherein the first antenna and the second antenna do not overlap each other.
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Abstract
An apparatus comprising a first antenna, a second antenna, wherein the first antenna and the second antenna comprise a common conductor, a variable load connected between the common conductor and a ground connection, wherein an impedance of the variable load is variable, and wherein an operating frequency of the first antenna and the second antenna depends on the impedance, and a selection switch coupled to the first antenna and the second antenna, wherein the selection switch is configured to activate the first antenna and deactivate the second antenna in a first state, and wherein the selection switch is configured to activate the second antenna and deactivate the first antenna in a second state.
39 Citations
20 Claims
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1. An apparatus comprising:
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a first antenna configured to be driven by a first feed; a second antenna configured to be driven by a second feed different from and physically separated from the first feed, wherein the first antenna and the second antenna comprise a common conductor; a variable load disposed between the first feed and the second feed and connected between the common conductor and a ground connection, wherein an impedance of the variable load is variable, and wherein an operating frequency of the first antenna and the second antenna depends on the impedance; and a selection switch coupled to the first antenna and the second antenna, wherein the selection switch is configured to activate the first antenna and deactivate the second antenna in a first state, wherein the selection switch is configured to activate the second antenna and deactivate the first antenna in a second state, and wherein the first antenna and the second antenna do not overlap each other. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless communication device comprising:
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a first antenna configured to be driven by a first feed; a second antenna configured to be driven by a second feed different from and physically separated from the first feed, wherein the first antenna and the second antenna comprise a common conductor but do not overlap each other; a variable load disposed between the first feed and the second feed and connected between the common conductor and a ground connection, wherein an impedance of the variable load is variable, and wherein an operating frequency of the first antenna and the second antenna depends on the impedance; a selection switch coupled to the first antenna and the second antenna, wherein the selection switch is configured to activate only the first antenna in a first state and activate only the second antenna in a second state; and a processor coupled to the variable load and the selection switch, wherein the processor is configured to; set a state of the selection switch from among the first state and the second state based on an orientation of the wireless communication device; select a first operating frequency band; and set the impedance to a value to achieve the first operating frequency band. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for operating a wireless communication device comprising a first antenna configured to be driven by a first feed, a second antenna configured to be driven by a second feed different from and physically separated from the first feed, and a variable load disposed between the first feed and the second feed, wherein the first antenna and the second antenna share a common conductor but do not overlap each other, and wherein the variable load is directly connected to the common conductor, the method comprising:
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determining an orientation of the wireless communication device; determining an operating frequency band; activating only one of the first antenna or the second antenna based on at least one of the operating frequency band and the orientation; and adjusting an impedance of the variable load in accordance with the operating frequency band. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification