Patent ID: 7633446
Filing Date: 2009-12-15
Classification: H01Q

Abstract:
1. An antenna apparatus applicable for a wireless device operated in a frequency band, comprising: an antenna unit comprising a first conductor having a first end for feeding signals and a second end; and a ground plane providing a ground reference to the signals; wherein there is a first distance between the first conductor and the ground plane, and the first distance is adjustable to improve the impedance matching of the antenna apparatus; wherein the area of the first conductor is less than 1/64 square of operating wavelength of the antenna unit; wherein there is an angle between the first conductor and the ground plane, and the angle is adjustable to improve impedance matching of the antenna apparatus; and wherein the antenna unit has an input impedance having a real part and an imaginary part, the real part of the input impedance is adjustable by tuning the angle.