Patent ID: 7561110
Filing Date: 2009-07-14
Classification: H01Q

Abstract:
1. A printed antenna for wireless networking device, comprising: a base plate, on a surface of which a first direction and second direction perpendicular to each other are defined; the base plate having at least a first edge generally perpendicular to the first direction, and a second edge generally perpendicular to the second direction; a grounding member electrically grounded and covering at least a partial area of the base plate surface; the grounding member being a first space apart from the first edge in the first direction, and being a second space apart from the second edge in the second direction; a first antenna, extending from grounding member generally towards the first edge and positioned in the first space; and a second antenna, extending from grounding member generally towards the second edge and positioned in the second space, wherein said first antenna is a dipole antenna, and said second antenna is a monopole antenna, wherein said base plate has a first surface and a second surface opposing each other and having grounding member covered thereon; the areas on the two surfaces covered by the grounding member generally correspond to each other and have the same contour; the first antenna and the second antenna are provided on the first surface, wherein said first antenna is a T-dipole antenna and further comprises: a T-shaped radiating element configured on the second surface of base plate and comprising: a body extending from grounding member along the first direction to a place adjacent to first edge, a long narrow slot formed in the middle of body and extending a predetermined length from the end of first edge nearer the body along the first direction towards the grounding member; and two extension members respectively extending a predetermined length from the left and right side of body at the end nearer the first edge in a direction generally parallel to the second direction; and a microstrip line positioned on the first surface of base plate and adjoining the long narrow slot; said microstrip line comprising: a first long narrow member extending from the grounding member in a direction roughly parallel to the direction of long narrow slot to a place near the first edge, a bend member with one end connected to an end of the first long narrow member and extending along the second direction to cross over the long narrow slot, and a second long narrow member with one end connected to the other end of bend member and extending in a direction roughly parallel to the long narrow slot towards the grounding member.