ANTENNA DEVICE AND ELECTRONIC APPARATUS

摘要

A square bracket-shaped radiation element is in a non-ground region of a board. A first reactance element that equivalently enters a short-circuited state in a second frequency band is connected between a second end of the radiation element and a ground conductor. A second reactance element that equivalently enters a short-circuited state in a first frequency band s connected between a first end of the radiation element and the ground conductor. In the UHF band, the radiation element and the ground conductor function as an inverted F antenna that contributes to field emission. In the HF band, a loop including the radiation element and the ground conductor functions as a loop antenna that contributes to magnetic field emission.

主权项

1. An electronic apparatus comprising:
an antenna device; a first feeder circuit that feeds a communication signal of a first frequency band to the antenna device; and a second feeder circuit that feeds a communication signal of a second frequency band that is lower than the first frequency band to the antenna device; wherein the antenna device includes a radiation element of an electric field type antenna, and a ground conductor arranged so as to face the radiation element; at least one first reactance element is connected between the radiation element and the ground conductor, such that the radiation element, the first reactance element, and the ground conductor define a loop unit of a magnetic field type antenna; the radiation element is an antenna element for the first frequency band, and the loop unit is an antenna element for the second frequency band; and an entirety of the radiation element that functions as an antenna element for the second frequency band is used as an antenna element for the first frequency band.