Patent ID: 6717548
Filing Date: 2004-04-06
Classification: H01Q

Abstract:
A dual or multi-frequency planar inverted F-antenna comprising:a) a metal surface including: i) a long antenna section having an outer boundary edge; ii) a short antenna section located within the outer boundary edge of the long antenna section, the short antenna section connected to the long antenna section by a connection section, the short antenna section having an end point spaced from the connection section; and, iii) a single slot separating the short antenna section from the long antenna section except for the connection section, the single slot including an open end at the outer boundary edge and a closed end, the slot having a non-uniform width and oriented such that the connection section is bounded on opposite sides by the closed end of the slot and a portion of the slot adjacent to the open end; b) a feed point on the long antenna section; and, c) a short point on the long antenna section spaced from the feed point, distances between the short point and the open end of the slot, and between the short point and the end point of the short antenna section are &lgr;/4 of respective resonance frequencies.