Antenna device, feed element, and communication terminal device

摘要

An antenna device includes a conductor surface in which an opening having an open edge portion in communication with the outside is provided, a feed element including a first coil connected to the feed element and a second coil magnetically coupled to the first coil, a first mounting portion disposed in the open edge portion and connected to a first end of the second coil, and a second mounting portion disposed in the open edge portion in a state isolated from the first mounting portion and connected to a second end of the second coil. The first mounting portion and the conductor surface are directly or indirectly conducted to each other, and the second mounting portion and the conductor surface are directly or indirectly conducted to each other. A loop is defined around the opening through the first mounting portion, the second mounting portion, and the second coil.

主权项

1. An antenna device comprising:
a conductor member; and a feed element that feeds a high-frequency signal to the conductor member; wherein the feed element includes:
a first coil connected to a feed circuit;a first capacitor connected to the first coil to define a first resonance circuit with the first coil;a second coil connected to the first coil by magnetic coupling;a second capacitor connected to the second coil to define a second resonance circuit with the second coil; andtwo terminal electrodes that connect the second coil to the conductor member; whereinthe feed circuit and the conductor member are connected with each other by magnetic coupling; andthe first coil, the second coil, and the two terminal electrodes are integrally provided with an insulating body.