Patent ID: 6677903
Filing Date: 2004-01-13
Classification: H01Q

Abstract:
A multiple frequency band antenna, comprising:a substrate comprising opposite first and second surfaces; a planar conducting layer having a substantially quadrilateral shape disposed on the first surface; a monopole conducting layer disposed on the second surface; and a quarter wave choke strip disposed on the second surface having one end electrically connected to the monopole conducting layer and a free end, the free end electrically coupled to the planar conducting layer disposed on the opposite surface; wherein the antenna is configured to radiate in an upper frequency band, a middle frequency band, and a low frequency band, the monopole conducting layer is configured to radiate as a monopole in the upper frequency band, the quarter wave choke strip is configured to radiate in the middle frequency band; and the monopole conducting layer, the quarter wave choke strip, and the planar conducting layer combined are configured to radiate as a monopole in the low frequency band.