Narrow width dual/tri ISM band PIFA for wireless applications

An antenna, comprising:

• a ground plane;
• a radiating element;
• a short;
• a feed tab;
• a tuning stub;
• and
• a parasitic element, wherein,
• the ground plane comprises a first ground plane edge and a second ground plane edge, the first ground plane edge and the second ground plane edge residing at opposite sides of the ground plane and across a ground plane width;
• the ground plane comprises a third ground plane edge and a fourth ground plane edge, the third ground plane edge and the fourth ground plane edge extend between the first ground plane edge and the second ground plane edge and reside on opposing sides of the ground plane and along a ground plane length;
• the radiating element comprises a first radiating element edge and a second radiating element edge, the first radiating element edge and the second radiating element edge residing at opposite sides of the radiating element and across a radiating element width;
• the radiating element comprises a third radiating element edge and a fourth radiating element edge, the third radiating element edge and the fourth radiating element edge extend between the first radiating element edge and the second radiating element edge and reside on opposing sides of the radiating element and along a radiating element length;
• the short comprising a first short edge and a second short edge, wherein the first short edge is coupled to the first ground plane edge and the first radiating element edge shorting the ground plane to the radiating element;
• the feed tab comprising a first feed tab edge and a second feed tab edge, wherein the first feed tab edge is coupled to the fourth radiating element edge and the second feed tab edge resides a first predetermined distance above the ground plane;
• the tuning stub comprising a first tuning stub edge and a second tuning stub edge, wherein the first tuning stub edge is coupled to the fourth radiating element edge and the second tuning stub edge resides a second predetermined distance above the ground plane;
• and
• the parasitic element comprises a first vertical plate edge, a vertical plate, a second vertical plate edge, a horizontal plate, a first horizontal plate edge and a second horizontal plate edge, wherein the first vertical plate edge is coupled to the second ground plane edge such that the vertical plate extends above the ground plane and the second vertical plate edge is coupled to the second horizontal plate edge such that the horizontal plate extends towards the second radiating element edge.

An antenna, comprising:

• a ground plane;
• a radiating element;
• a slot formed in the radiating element;
• a feed tab;
• a short;
• a first tuning stub;
• a second tuning stub;
• and
• a third tuning stub;
• wherein,
• the ground plane comprises a first ground plane edge and a second ground plane edge, the first ground plane edge and the second ground plane edge residing at opposite sides of the ground plane and across a ground plane width;
• the ground plane comprises a third ground plane edge and a fourth ground plane edge, the third ground plane edge and the fourth ground plane edge extend between the first ground plane edge and the second ground plane edge and reside on opposing sides of the ground plane and along a ground plane length;
• the radiating element comprises a first radiating element edge and a second radiating element edge, the first radiating element edge and the second radiating element edge residing at opposite sides of the radiating element and across a radiating element width;
• the radiating element comprises a third radiating element edge and a fourth radiating element edge, the third radiating element edge and the fourth radiating element edge extend between the first radiating element edge and the second radiating element edge and reside on opposing sides of the radiating element and along a radiating element length;
• the short comprising a first short edge and a second short edge, wherein the first short edge is coupled to the third radiating element edge and the second short edge is coupled to the third ground plane edge to short the radiating element to the ground plane;
• the feed tab comprising a first feed tab edge and a second feed tab edge, wherein the first feed tab edge is coupled to the first radiating element edge and the second feed tab edge resides a first predetermined distance above the ground plane;
• the slot comprising a gap on the third radiating element edge, the gap comprising a first gap side and a second gap side;
• the first short edge is coupled on the third radiating element edge between the first gap side and the first radiating element edge;
• the first tuning stub comprising a first tuning stub first edge and a first tuning stub second edge, wherein the first tuning stub first edge is coupled to the third radiating element edge and the first tuning stub second edge resides above the ground plane a second predetermined distance and the first tuning stub first edge is coupled on the third radiating element edge between the second gap side and the second radiating element edge;
• the second tuning stub comprising a second tuning stub first edge and a second tuning stub second edge, wherein the second tuning stub first edge is coupled to the fourth radiating element edge and the second tuning stub second edge resides above the ground plane a third predetermined distance;
• the third tuning stub comprising a third tuning stub first edge and a third tuning stub second edge, wherein the third tuning stub first edge is coupled to the fourth radiating element edge and the third tuning stub second edge resides above the ground plane a fourth predetermined distance;
• and
• the third tuning stub is coupled to the fourth radiating element edge between the second tuning stub and the first radiating element edge.

An antenna, comprising:

• a ground plane;
• a radiating element;
• a slot formed in the radiating element;
• a feed tab;
• a short;
• a first tuning stub;
• a second tuning stub;
• a third tuning stub, and
• a parasitic element;
• wherein,
• the ground plane comprises a first ground plane edge and a second ground plane edge, the first ground plane edge and the second ground plane edge residing at opposite sides of the ground plane and across a ground plane width,
• the ground plane comprises a third ground plane edge and a fourth ground plane edge, the third ground plane edge and the fourth ground plane edge extend between the first ground plane edge and the second ground plane edge and reside on opposing sides of the ground plane and along a ground plane length,
• the radiating element comprises a first radiating element edge and a second radiating element edge, the first radiating element edge and the second radiating element edge residing at opposite sides of the radiating element and across a radiating element width;
• the radiating element comprises a third radiating element edge and a fourth radiating element edge, the third radiating element edge and the fourth radiating element edge extend between the first radiating element edge and the second radiating element edge and reside on opposing sides of the radiating element and along a radiating element length;
• the short comprising a first short edge and a second short edge, wherein the first short edge is coupled to the first radiating element edge and the second short edge is coupled to the first ground plane edge to short the radiating element to the ground plane;
• the feed tab comprising a first feed tab edge and a second feed tab edge, wherein the first feed tab edge is coupled to the third radiating plane edge and the second feed tab edge resides a first predetermined distance above the ground plane;
• the slot comprising a gap on the third radiating element edge, the gap comprising a first gap side and a second gap side;
• the first feed tab edge is coupled on the third radiating element edge between the first gap side and the first radiating element edge, the first tuning stub comprising a first tuning stub first edge and a first tuning stub second edge, wherein the first tuning stub first edge is coupled to the third radiating element edge and the first tuning stub second edge resides above the ground plane a second predetermined distance, the first tuning stub first edge is coupled on the third radiating element edge between the second gap side and the second radiating element edge;
• the second tuning stub comprising a second tuning stub first edge and a second tuning stub second edge, wherein the second tuning stub first edge is coupled to the third radiating element edge and the second tuning stub second edge resides above the ground plane a third predetermined distance;
• the first tuning stub located closer to the second gap side than the second tuning stub;
• the third tuning stub comprising a third tuning stub first edge and a third tuning stub second edge, wherein the third tuning stub first edge is coupled to the fourth radiating element edge and the third tuning stub second edge resides above the ground plane a fourth predetermined distance;
• the parasitic element comprising a parasitic element first edge and a parasitic element second edge, wherein the parasitic element second edge is coupled to the fourth ground plane edge and the parasitic element first edge resides below the radiating element a fifth predetermined distance;
• and
• the parasitic element is coupled to the fourth ground plane edge closer to the short than the third tuning stub.

An antenna, comprising:

• a ground plane;
• a radiating element;
• a slot formed in the radiating element;
• a feed tab;
• a short;
• a tuning stub;
• a parasitic element;
• and
• a vertical plate;
• wherein,
• the ground plane comprises a first ground plane edge and a second ground plane edge, the first ground plane edge and the second ground plane edge residing at opposite sides of the ground plane and across a ground plane width;
• the ground plane comprises a third ground plane edge and a fourth ground plane edge, the third ground plane edge and the fourth ground plane edge extend between the first ground plane edge and the second ground plane edge and reside on opposing sides of the ground plane and along a ground plane length,
• the radiating element comprises a first radiating element edge and a second radiating element edge, the first radiating element edge and the second radiating element edge residing at opposite sides of the radiating element and across a radiating element width;
• the radiating element comprises a third radiating element edge and a fourth radiating element edge, the third radiating element edge and the fourth radiating element edge extend between the first radiating element edge and the second radiating element edge and reside on opposing sides of the radiating element-and along a radiating element length;
• the short comprising a first short edge and a second short edge, wherein the first short edge is coupled to the first radiating element edge and the second short edge is coupled to the first ground plane edge to short the radiating element to the ground plane;
• the feed tab comprising a first feed tab edge and a second feed tab edge, wherein the first feed tab edge is coupled to the fourth radiating element edge and the second feed tab edge resides a first predetermined distance above the ground plane;
• the slot comprising a gap on the fourth radiating element edge, the gap comprising a first gap side and a second gap side;
• the first feed tab edge is coupled on the fourth radiating element edge between the first gap side and the first radiating element edge;
• the tuning stub comprising a first tuning stub edge and a second tuning stub edge, wherein the first tuning stub edge is coupled to the fourth radiating element edge and the second tuning stub edge resides a second predetermined distance above the ground plane, the tuning stub is coupled to the fourth radiating element edge between the second gap side and the second radiating element edge;
• the parasitic element comprising a first parasitic edge and a second parasitic edge, wherein the second parasitic edge is coupled to the third ground plane edge and the first parasitic edge resides below the radiating element a third predetermined distance;
• and
• the vertical plate comprises a first vertical plate edge and a second vertical plate edge, wherein the first vertical plate edge is coupled to the second radiating element edge and the second vertical plate edge resides above the ground plane a fourth predetermined distance.