Electronic device antennas including conductive display structures
An electronic device may be provided with wireless circuitry and control circuitry. The wireless circuitry may include multiple antennas and transceiver circuitry. An antenna in the electronic device may have an inverted-F antenna resonating element formed from portions of a peripheral conductive electronic device housing structure and may have an antenna ground that is separated from the antenna resonating element by a gap. The antenna ground for the antenna may include a conductive frame for the display. The conductive frame may have a first portion that is separated from the antenna resonating element arm by a first distance and a second portion that is separated from the antenna resonating element arm by a second distance that is less than the first distance. The second portion may be configured to form a distributed impedance matching capacitance with the antenna resonating element arm.
1. An electronic device comprising:
a housing having peripheral conductive structures;
a display in the housing;
a conductive frame for the display;
an antenna resonating element arm for an antenna, wherein the antenna resonating element arm is formed from a segment of the peripheral conductive structures; and
an antenna ground for the antenna that includes the conductive frame for the display, wherein the conductive frame has a first portion that is separated from the antenna resonating element arm by a first distance and a second portion that is separated from the antenna resonating element arm by a second distance that is less than the first distance and the second portion is configured to form a distributed capacitance with the antenna resonating element arm.
2. The electronic device defined in claim 1 , further comprising;
an antenna feed for the antenna, wherein the antenna feed is coupled between the second portion of the conductive frame and the antenna resonating element arm.
3. The electronic device defined in claim 1 , further comprising:
a conductive display plate that is coupled to the conductive frame, wherein the antenna ground includes the conductive display plate.
4. The electronic device defined in claim 1 , wherein the conductive frame has a rectangular periphery with upper and lower edges coupled together by left and right edges and a central opening surrounded by the upper, lower, left, and right edges.
5. The electronic device defined in claim 1 , wherein the segment of the peripheral conductive structures is a first segment, the electronic device further comprising:
a first dielectric-filled gap in the peripheral conductive structures that separates the first segment from a second segment of the peripheral conductive structures; and
a second dielectric-filled gap in the peripheral conductive structures that separates the first segment from a third segment of the peripheral conductive structures.
6. The electronic device defined in claim 5 , wherein the antenna ground comprises the second and third segments of the peripheral conductive structures and a planar conductive layer that extends between the second and third segments of the peripheral conductive structures.
7. The electronic device defined in claim 5 , wherein the antenna ground includes a first vertical slot that extends beyond an edge of the first dielectric-filled gap and the first vertical slot has edges defined by the conductive frame and the second segment of the peripheral conductive structures.
8. The electronic device defined in claim 7 , wherein the antenna ground includes a second vertical slot that extends beyond an edge of the second dielectric-filled gap and the second vertical slot has edges defined by the conductive frame and the third segment of the peripheral conductive structures.
9. The electronic device defined in claim 1 , wherein a dielectric-filled gap is interposed between the antenna resonating element arm and the first and second portions of the conductive frame.
10. An electronic device comprising:
a housing having peripheral conductive structures;
a display in the housing;
a conductive frame for the display;
an antenna resonating element arm for an antenna, wherein the antenna resonating element arm is formed from a first segment of the peripheral conductive structures;
a first dielectric-filled gap in the peripheral conductive structures that separates the first segment from a second segment of the peripheral conductive structures;
a second dielectric-filled gap in the peripheral conductive structures that separates the first segment from a third segment of the peripheral conductive structures;
a planar conductive layer that extends between the second and third segments;
an antenna ground for the antenna that includes the conductive frame for the display, the second segment, the third segment, and the planar conductive layer;
a conductive structure that electrically couples the planar conductive layer to the conductive frame.
11. An electronic device comprising:
a housing having peripheral conductive structures and a planar conductive layer extending between first and second segments of the peripheral conductive structures;
a display in the housing;
a conductive display frame;
a first dielectric-filled gap in the peripheral conductive structures that separates the first segment from a third segment of the peripheral conductive structures;
a second dielectric-filled gap in the peripheral conductive structures that separates the second segment from the third segment;
an antenna resonating element for an antenna formed from at least the third segment of the peripheral conductive structures; and
an antenna ground for the antenna formed from at least the planar conductive layer, the first and second segments of the peripheral conductive structures, and the conductive display frame, wherein the antenna ground includes a first vertical slot that extends beyond an edge of the first dielectric-filled gap and the first vertical slot has edges defined by the conductive display frame and the first segment of the peripheral conductive structures.
12. The electronic device defined in claim 11 , wherein a distributed impedance matching capacitance for the antenna is formed by the conductive display frame and the antenna resonating element.
13. The electronic device defined in claim 11 , wherein the antenna ground includes a second vertical slot that extends beyond an edge of the second dielectric-filled gap and the second vertical slot has edges defined by the conductive display frame and the second segment of the peripheral conductive structures.