Patent ID: 8766871

Claim:
An antenna device, comprising: an insulating base substrate; a first monopole antenna; a second monopole antenna; a first passive element; and a second passive element, wherein: the first monopole antenna and the second monopole antenna are disposed on the insulating base substrate, the first monopole antenna includes: a first portion extended from a power feeding end connected to a power feeding section; and a second portion extended from another end of the first portion to left side, the second monopole antenna includes: a first portion extended in a same direction as the first portion of the first monopole antenna from a power feeding end connected to the power feeding section; and a second portion extended from another end of the first portion to right side, and the first passive element is disposed between the first portion of the first monopole antenna and the first portion of the second monopole antenna, the first passive element and the second passive element sandwiches either one of the first portion of the first monopole antenna or the first portion of the second monopole antenna.