Antennas for compact portable wireless devices

A compact portable wireless device comprising:

• a housing formed substantially from dielectric;
• a printed circuit board comprising a planar antenna ground structure and circuit interconnects;
• electrical components mounted to the printed circuit board;
• an inverted-F antenna resonating element mounted to the printed circuit board, wherein the inverted-F antenna resonating element has a main structure formed from a strip of conductor, has a ground leg that is connected to the planar antenna ground structure, and has a feed leg and wherein the ground leg is perpendicular to the planar antenna ground structure;
• and
• a parasitic antenna element that is separated from the planar antenna ground structure by a gap, wherein the housing has a curved edge and wherein the planar antenna ground structure has a curved edge that matches the curved edge of the housing.

A compact portable wireless device comprising:

• a housing formed substantially from dielectric;
• a printed circuit board comprising a planar antenna ground structure and circuit interconnects;
• electrical components mounted to the printed circuit board;
• an inverted-F antenna resonating element mounted to the printed circuit board, wherein the inverted-F antenna resonating element has a main structure formed from a strip of conductor, has a ground leg that is connected to the planar antenna ground structure, and has a feed leg and wherein the ground leg is perpendicular to the planar antenna ground structure;
• and
• a parasitic antenna element that is separated from the planar antenna ground structure by a gap, wherein the housing has a curved edge and wherein the strip of conductor in the resonating element has a curved shape that matches the curved edge.

A compact portable wireless device comprising:

• a housing formed substantially from dielectric;
• a printed circuit board comprising a planar antenna ground structure and circuit interconnects;
• electrical components mounted to the printed circuit board;
• an inverted-F antenna resonating element mounted to the printed circuit board, wherein the inverted-F antenna resonating element has a main structure formed from a strip of conductor, has a ground leg that is connected to the planar antenna ground structure, and has a feed leg and wherein the ground leg is perpendicular to the planar antenna ground structure;
• and
• a parasitic antenna element that is separated from the planar antenna ground structure by a gap, wherein the parasitic antenna element comprises a planar metal structure having a curved edge along the gap.

A compact portable wireless device antenna comprising:

• a printed circuit board that forms a planar ground structure;
• an F-shaped resonating element having a feed arm, a ground arm, and a main structure formed from a strip of conductor, wherein the ground arm of the F-shaped resonating element is connected to the planar ground structure, and wherein the feed arm and ground arm are perpendicular to the planar ground structure;
• and
• a planar parasitic element that is separated from the planar ground structure by a gap, wherein the planar parasitic element and the planar ground structure lie in a common plane.

An antenna in a compact portable wireless device in a piece of sports equipment, comprising:

• a planar ground structure;
• an inverted-F resonating element having a main structure formed of a semicircular curved strip of metal that is less than 3.0 millimeters in width and having a feed arm and a ground arm, wherein the main structure is parallel to the planar ground structure, wherein the feed arm and the ground arm are perpendicular to the planar ground structure, and wherein the ground arm is electrically connected to the planar ground structure;
• and
• a circular parasitic antenna element that is coplanar with the planar ground structure and that is separated from the planar ground structure by a gap.

A system in which data is wirelessly transmitted to a handheld electronic device, comprising:

• a compact portable wireless device that wirelessly the data to the handheld electronic device, comprising:
• a dielectric housing having a first housing portion and a second housing portion;
• a printed circuit board that is mounted within the housing, wherein the printed circuit board has a plurality of layers, wherein at least one of the layers is used to form a planar antenna ground structure;
• an inverted-F resonating element having a main structure formed of a semicircular curved strip of metal that is less than 3.0 millimeters in width and having a feed arm and a ground arm, wherein the main structure is parallel to the planar ground structure, wherein the feed arm and the ground arm are perpendicular to the planar ground structure, and wherein the ground arm is electrically connected to the planar ground structure;
• and
• a circular parasitic antenna element that is coplanar with the planar ground structure and that is separated from the planar ground structure by a gap.

A compact portable wireless device comprising:

• a housing formed substantially from dielectric;
• a printed circuit board comprising a planar antenna ground structure and circuit interconnects;
• electrical components mounted to the printed circuit board;
• an inverted-F antenna resonating element mounted to the printed circuit board, wherein the inverted-F antenna resonating element has a main structure formed from a strip of conductor, has a ground leg that is connected to the planar antenna ground structure, and has a feed leg and wherein the ground leg is perpendicular to the planar antenna ground structure;
• and
• a parasitic antenna element that is separated from the planar antenna ground structure by a gap, wherein at least some of the electrical components are interposed between the inverted-F antenna resonating element and the parasitic antenna element.