Multiband antenna for handheld terminal

A multiband antenna comprising:

• a first conducting layer;
• a second conducting layer;
• said first conducting layer acting as a radiating element being placed over said second conducting layer;
• said second conducting layer acting as a ground plane;
• said first conducting layer comprises a feeding point, wherein said feeding point is a starting point for a first shorter arm and a second longer arm, said first and second arms forming a multilevel structure for said multiband antenna;
• wherein said first and second arms define a winding path, wherein said second longer arm is folded upon itself to run in parallel with the winding path of said first shorter arm, such that a gap between said first shorter arm and said second longer arm is formed;
• said gap following substantially the same winding path as said first and second arms on said multilevel structure;
• wherein said first shorter arm is composed by at least four rectangles, said four rectangles being sequentially interconnected through their shorter edges;
• and
• wherein said second longer arm is composed at least by eleven rectangles, said eleven rectangles being sequentially interconnected through their shorter edges, wherein said both arms define said winding path over said second conducting layer, wherein said second longer arm is folded upon itself to run in parallel with the winding path of said first shorter arm such that a gap between both arms is formed, said gap following substantially similar winding path to those of said first and second arms.

A multiband antenna comprising:

• a first conducting layer;
• a second conducting layer;
• said first conducting layer acting as a radiating element being placed over said second conducting layer;
• said second conducting layer acting as a ground plane;
• said first conducting layer comprises a feeding point, wherein said feeding point is a starting point for a first shorter arm and a second longer arm, said first and second arms forming a multilevel structure for said multiband antenna;
• wherein said first and second arms define a winding path, wherein said second longer arm is folded upon itself to run in parallel with the winding path of said first shorter arm such that a gap between said first shorter arm and said second longer arm is formed, said gap following substantially the same winding path as said first and second arms on said multilevel structure;
• wherein at least a portion of an area on the second conducting layer which is underneath said first conducting layer is shaped as a multilevel structure or a space-filling structure or a combination of both;
• and
• wherein said multilevel or space-filling structure on said second conducting layer defines at least a slot on said ground-plane, said slot being substantially aligned underneath one edge of said first conducting layer.