Patent ID: 8416138

Claim:
A multiband antenna, comprising: a printed circuit board having a first edge and a second edge, where the first edge and the second edge are parallel to each other and on opposite sides of the printed circuit board; a high frequency antenna element configured to receive a feed, where the resonance of the multiband antenna in a high frequency mode is determined by the width and shape of the high frequency antenna element, the high frequency antenna element is formed along the first edge of the printed circuit board, the high frequency antenna element is of a substantially elongated shape having a long axis and a short axis; a low frequency antenna element connected to the high frequency antenna element via a choking circuit, where the low frequency antenna element is formed along the second edge of the printed circuit board parallel to the high frequency antenna element, the low frequency antenna element is of a substantially elongated shape having a long axis and a short axis, where the long axis of the low frequency antenna element is parallel to the long axis of the high frequency antenna element; wherein the choking circuit comprises a meander line circuit trace formed on the printed circuit board substantially perpendicular to the long axis of the high frequency antenna element and the long axis of the low frequency antenna element, where: the choking circuit is configured to act as an inductive component; the meander line circuit trace extends between the high frequency antenna element and the low frequency antenna element; and the substantially perpendicular orientation relative to the long axis of the high frequency antenna element of the meander line circuit trace limits cross coupling between the high frequency antenna element and the meander line circuit trace; wherein the choking circuit is configured to couple the low frequency antenna element to the high frequency antenna element in a low frequency band and decouple the high frequency antenna element from the low frequency antenna element in a high frequency band; and wherein the low frequency antenna element is positioned to increase the width of the multiband antenna in a low frequency mode and the resonance of the multiband antenna in the low frequency mode is determined by the length and position of the low frequency antenna element relative to the high frequency antenna element.