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US 12,763,469 B2Granted
Antenna device
AssigneeMurata Manufacturing Co., Ltd.
InventorYoshihiro Sako
Life of this patent
Estimating the term…
Abstract
An antenna device is provided that includes an antenna circuit and a resistance circuit. The antenna circuit has a first inductor. The resistance circuit has a second inductor and is electrically connected to the antenna circuit. The first inductor has a first winding and a core arranged inside the first winding. The second inductor has a second winding that comprises an air-core coil.
Claims18
An antenna device comprising:
- an antenna circuit having a first inductor that includes a first winding and a core inside the first winding;
- and
- a resistance circuit having a second inductor and that is electrically connected to the antenna circuit,
- wherein the second inductor has a second winding that forms an air-core coil, and
- wherein the second winding includes a first winding portion and a second winding portion that are aligned in an axial direction of the air-core coil,
- wherein the antenna circuit has a capacitor electrically connected to the first inductor, and
- wherein the first inductor is located on a side opposite to the second inductor with respect to the capacitor.
4 more elements
An antenna device comprising:
- an antenna circuit having a first inductor that includes a first winding and a core inside the first winding;
- and
- a resistance circuit having a second inductor and that is electrically connected to the antenna circuit and a third inductor electrically connected to the second inductor,
- wherein the second inductor has a second winding that forms an air-core coil,
- wherein the second winding includes a first winding portion and a second winding portion that are aligned in an axial direction of the air-core coil,
- wherein the third inductor has a third winding that forms an air-core coil, and
- wherein an axial direction of the third winding intersects an axial direction of the first winding.
4 more elements
An antenna device comprising:
- an antenna circuit having a first inductor with a first winding and a first core inside the first winding;
- and
- a resistance circuit having a second inductor that is electrically connected to the antenna circuit and has a second winding and a second core inside the second winding,
- wherein the second winding has a set of a first winding portion and a set of a second winding portion,
- wherein a winding direction of the first winding portion is opposite to a winding direction of the second winding portion,
- wherein the first winding portion and the second winding portion are aligned in an axial direction of the second core, and
- wherein the antenna circuit has a capacitor electrically connected to the first inductor, and the first inductor is located on a side opposite to the second inductor with respect to the capacitor.
4 more elements
Dependencies are inferred from the claim text.