Patent ID: 9444150
Filing Date: 2016-09-13
CPC Classification: H01Q

Claim Text:
1. An antenna device comprising: an enclosure; a circuit board provided in the enclosure and having a ground pattern; a first antenna element which is made of a conductive metal and operates in a first frequency band; a second antenna element which is made of a conductive metal and operates in the first frequency band and a second frequency band; a first connection circuit which electrically connects portions of the first antenna element and the second antenna element; a first radio circuit unit provided on the circuit board; a first feeding portion electrically connected to the first radio circuit unit; a second radio circuit unit provided on the circuit board; a second feeding portion electrically connected to the second radio circuit unit; and a second frequency band cutoff circuit for electrical cutoff in the second frequency band, an electrical pathway between the second frequency band cutoff circuit and the first feeding portion being shorter than an electrical pathway between the first connection circuit and the first feeding portion, wherein the first antenna element and the second antenna element are disposed close to each other so as have a predetermined interval from the ground pattern on the circuit board, the first antenna element is electrically connected to the first feeding portion via the second frequency band cutoff circuit, the second antenna element is electrically connected to the second feeding portion, and the first connection circuit is configured to cancel out mutual coupling impedance between the first antenna element and the second antenna element in the first frequency band.