Patent ID: 6304232
Filing Date: 2001-10-16
Classification: G06K,H01Q,H04B,H05K

Abstract:
A circuit module comprising:a first printed circuit board having electronic components on a first surface thereof, having a first conductive trace on the first surface thereof, and having a second conductive trace on a second surface thereof, wherein the second conductive trace is connected to the first conductive trace; and to selected ones of the electronic components;a second printed circuit board in the form of a ring, disposed on the first surface of the first printed circuit board and having an opening for containing the electronic components;an antenna;a third printed circuit board, disposed atop the second printed circuit board and having a third conductive trace disposed on a surface of the third printed circuit board;wherein:the third conductive trace is connected to the antenna; andthe first and second conductive traces constitute a first winding of an air-gap transformer; andthe third conductive trace constitutes a second winding of the air-gap transformer.