Stacked package loop antenna for WLAN based on IPD manufacturing technology

This paper proposes a coupled-fed loop antenna based on integrated passive device (IPD) manufacturing technology in stacked package for IEEE 802.11b/g operation. The fractal structure is applied to further reduce the size of the loop antenna in stacked package, and high resolution of the fractal structure can be achieved by taking the advantage of the IPD manufacturing technology. Therefore, the size of the proposed antenna is only 8.5×3.25 mm² over the operating band (2.4-2.484 GHz). The radiation efficiency and peak gain are better than 60% and 1 dBi, respectively, over operating band. The detailed structure of the stacked package with proposed antenna is presented.