Tuning circuits for hybrid electronic device antennas
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 inverted-F antenna resonating element for the hybrid antenna;
an antenna feed having a positive antenna feed terminal and a ground antenna feed terminal coupled between the planar inverted-F antenna resonating element and the ground plane; and
a return path coupled between the planar inverted-F antenna resonating element and the ground plane in parallel with the antenna feed, wherein the return path includes an adjustable circuit; and
an additional adjustable circuit that bridges the slot.
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Accused Products
Abstract
An electronic device may have hybrid antennas that include slot antenna resonating elements formed from slots in a ground plane and planar inverted-F antenna resonating elements. The planar inverted-F antenna resonating elements may each have a planar metal member that overlaps one of the slots. A return path and feed may be coupled in parallel between the planar metal member and the ground plane. Adjustable circuits such as tunable inductors may be used to tune the hybrid antennas. Adjustable circuits may bridge the slots in hybrid antennas and may be included in return paths that are coupled between the planar metal members of the planar inverted-F antenna resonating elements and the ground plane. A slot may be selectively divided to from two slots using switching circuitry.
219 Citations
21 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 inverted-F antenna resonating element for the hybrid antenna; an antenna feed having a positive antenna feed terminal and a ground antenna feed terminal coupled between the planar inverted-F antenna resonating element and the ground plane; and a return path coupled between the planar inverted-F antenna resonating element and the ground plane in parallel with the antenna feed, wherein the return path includes an adjustable circuit; and an additional adjustable circuit that bridges the slot. - 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 metal housing that forms a ground plane, wherein the metal housing has a dielectric-filled slot that separates the metal housing into first and second portions and that is divided into first and second slots by at least one switch that bridges the slot, and the at least one switch is configured to form a conductive path that electrically shorts the first portion of the metal housing to the second portion of the metal housing in a mode of operation; a first hybrid antenna that includes; a first slot antenna resonating element formed from the first slot; a first planar inverted-F antenna resonating element that indirectly feeds the first slot antenna; and a second hybrid antenna that includes; a second slot antenna resonating element formed from the second slot; a second planar inverted-F antenna resonating element that indirectly feeds the second slot antenna. - View Dependent Claims (15, 16, 17, 21)
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18. An antenna, comprising:
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a metal electronic device housing wall; a slot in the metal electronic device housing wall, wherein the slot divides the metal electronic device housing wall into first and second portions that are respectively located on opposing first and second sides of the slot; a planar inverted-F antenna resonating element that has a planar metal element, a return path formed on the first side of the slot and coupled between the planar metal element and the first portion of the metal electronic device housing wall, and an antenna feed having a positive antenna feed terminal on the first side of the slot and a ground antenna feed terminal on the first side of the slot coupled respectively to the planar metal element and the first portion of the metal electronic device housing wall; and a tunable circuit containing a capacitor that bridges the slot. - View Dependent Claims (19, 20)
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Specification