Patent ID: 9178280
Filing Date: 2015-11-03
Classification: H01Q

Abstract:
1. A loop antenna adapted for a communication device, the loop antenna comprising: a feed; a ground; a circular loop connected to the feed and the ground; at least one first tuning element extended from the circular loop, the at least one first tuning element corresponding to a first frequency band; and at least one second tuning element extended from the circular loop, the at least one second tuning element corresponding to a second frequency band, wherein the at least one first tuning element and the at least one second tuning element respectively comprise an electrical conductor, the electrical conductor is a capacitor, an inductor, or copper foil, wherein bandwidths of the first frequency band and the second frequency band of the loop antenna are changed by adjusting lengths, widths, values of charges of the capacitors or inductors of the at least one first tuning element and the at least one second tuning element, respectively, and the at least one first tuning element and the at least one second tuning element are located in the circular loop.