Hybrid electronic device antennas having parasitic resonating elements
First Claim
1. An electronic device, comprising:
- a housing having a metal housing wall that forms a ground plane;
a slot in the metal housing wall that forms a slot antenna resonating element for a hybrid antenna;
a planar antenna resonating element for the hybrid antenna, wherein the planar antenna resonating element is formed over the slot;
an antenna feed having a signal feed terminal coupled to the planar antenna resonating element and a ground feed terminal coupled to the ground plane, wherein the planar antenna resonating element is configured to indirectly feed the slot antenna resonating element;
a parasitic antenna resonating element for the hybrid antenna, wherein the planar antenna resonating element is interposed between the parasitic antenna resonating element and the slot;
a dielectric carrier, wherein the planar antenna resonating element and the parasitic antenna resonating element are supported by the dielectric carrier and the planar antenna resonating element is interposed between the parasitic antenna resonating element and a surface of the dielectric carrier; and
control circuitry, wherein the control circuitry is configured to control the hybrid antenna to operate in first and second tuning states, the parasitic antenna resonating element is decoupled from the ground plane and the hybrid antenna is configured to transmit radio-frequency signals in a frequency band in the first tuning state, and the parasitic antenna resonating element is coupled to the ground plane and the hybrid antenna is configured to transmit radio-frequency signals in the frequency band in the second tuning state.
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Accused Products
Abstract
An electronic device may have a hybrid antenna that includes a slot resonating element formed from a slot in a ground plane and a planar resonating element formed over the slot. A parasitic element may be disposed over the planar element. A switch may couple the parasitic element to the ground. A tunable circuit may couple the planar element to the ground. The switch and tunable circuit may be placed in different tuning states. In a first state, the tunable circuit and switch form open circuits. In a second state, the tunable circuit may an open circuit and the switch is closed. In a third state, the tunable circuit forms a return path and the switch forms an open circuit. This may allow the antenna to operate with satisfactory efficiency in low, mid, and high bands despite volume constraints imposed on the antenna.
241 Citations
20 Claims
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1. An electronic device, comprising:
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a housing having a metal housing wall that forms a ground plane; a slot in the metal housing wall that forms a slot antenna resonating element for a hybrid antenna; a planar antenna resonating element for the hybrid antenna, wherein the planar antenna resonating element is formed over the slot; an antenna feed having a signal feed terminal coupled to the planar antenna resonating element and a ground feed terminal coupled to the ground plane, wherein the planar antenna resonating element is configured to indirectly feed the slot antenna resonating element; a parasitic antenna resonating element for the hybrid antenna, wherein the planar antenna resonating element is interposed between the parasitic antenna resonating element and the slot; a dielectric carrier, wherein the planar antenna resonating element and the parasitic antenna resonating element are supported by the dielectric carrier and the planar antenna resonating element is interposed between the parasitic antenna resonating element and a surface of the dielectric carrier; and control circuitry, wherein the control circuitry is configured to control the hybrid antenna to operate in first and second tuning states, the parasitic antenna resonating element is decoupled from the ground plane and the hybrid antenna is configured to transmit radio-frequency signals in a frequency band in the first tuning state, and the parasitic antenna resonating element is coupled to the ground plane and the hybrid antenna is configured to transmit radio-frequency signals in the frequency band in the second tuning state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electronic device, comprising:
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a metal housing that forms an antenna ground; a hybrid antenna, comprising; a slot in the metal housing that forms a slot antenna resonating element; a planar antenna resonating element; an antenna feed having a positive feed terminal coupled to the planar antenna resonating element and a ground feed terminal coupled to the antenna ground, wherein the planar antenna resonating element is configured to indirectly feed the slot antenna resonating element; and a parasitic element that is coupled to the antenna ground by a switch; and control circuitry, wherein the control circuitry is configured to control the hybrid antenna to operate in first, second, and third tuning states, wherein the switch is closed in the first tuning state and open in the second and third tuning states, and the hybrid antenna is configured to resonate in a first frequency band and a third frequency band in the first tuning state, in the first frequency band and a second frequency band in the second tuning state, and in the third frequency band in the third tuning state. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. An antenna, comprising:
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a metal electronic device housing wall that forms an antenna ground; a slot in the metal electronic device housing wall that forms a slot antenna resonating element; a parasitic antenna element; a switching circuit coupled between the parasitic antenna element and the antenna ground; a planar metal element formed between the parasitic antenna element and the metal electronic device housing wall, wherein the planar metal element forms a planar antenna resonating element, and the planar antenna resonating element is configured to indirectly feed the slot antenna resonating element via nearfield electromagnetic coupling; a first antenna feed terminal coupled to the planar metal element; a second antenna feed terminal coupled to the antenna ground; and a tunable component coupled between the planar metal element and the antenna ground, wherein the tunable component forms a return path between the planar metal element and the antenna ground in a tuning setting, the switching circuit is open in the tuning setting, and the slot antenna resonating element, the planar antenna resonating element, and the antenna ground are configured to resonate in at least first and second frequency bands in the tuning setting. - View Dependent Claims (20)
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Specification