Patent ID: 9692118
Date: 2017-06-27
CPC Classifications: H01Q

Claim:
1. An antenna apparatus provided in a portable device, comprising: a main antenna having a first radiator pattern; a ground surface adjacent to the main antenna; and an auxiliary antenna separated from the main antenna by a ground surface and disposed entirely within a cut-out area of a printed circuit board (PCB) adjacent to the ground surface, wherein the auxiliary antenna radiates through the ground surface, wherein the auxiliary antenna comprises: a radiator element having a first end connected to an RF feed point and a second opposite end; a first group of series connected capacitors, the first group having a first side connected to the second end of the radiator element and a second side connected to a first ground surface location, and a second group of series connected capacitors, the second group having a first side connected to the second end of the radiator element and a second side connected to the first ground surface location, and wherein a capacitance of the first group of capacitors differs from the capacitance of the second group of capacitors, such that the auxiliary antenna resonates at multiple resonant frequencies through the first and second group of capacitors; and the second end of the radiator element is connected to the ground surface at a different location than the first ground surface location.