closed loop antenna for mobile phone and other applications

摘要

Closed loop antenna for mobile phone and other applications. The present invention relates to a closed loop antenna for cellular handsets and other devices. The antenna comprises a dielectric substrate having first and second opposing surfaces and a conductive track formed on the substrate. a feed point and a grounding point are provided adjacent to each other on the first surface of the substrate, with the conductive track extending generally in opposite directions from the feeding point and the grounding point, respectively. the conductive tracks then extend to one edge of the dielectric substrate before passing to the second surface of the dielectric substrate and then passing through the second surface of the dielectric substrate along a path generally following the path taken in the first one. dielectric substrate surface. the conductive tracks then connect to the respective sides of a conductive arrangement formed on the second surface of the dielectric substrate extending into the central portion of the closed circuit formed by the conductive track on the second surface of the dielectric substrate. the conductive arrangement comprising both inductive and capacitive elements. The antenna can be multi-mode and operate on various frequency stands.