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US 11,901,611 B2Granted
Antenna device and electronic apparatus
AssigneeMurata Manufacturing Co., Ltd.
InventorsTakafumi Nasu, Kenichi Ishizuka
Life of this patent
Estimating the term…
Abstract
An antenna device includes a first radiating element, a second radiating element having lower radiation efficiency than the first radiating element, a coupling element including first and second coils that are electromagnetically coupled to each other, and first and second phase adjusting elements. The first and second phase adjusting elements induce, at a resonant frequency of the second radiating element, a predetermined proportion of current flowing through the second radiating element to the first radiating element.
Claims20
An antenna device comprising:
- a first radiating element;
- a second radiating element;
- a first coil including a first end connected to a power supply circuit and a second end connected to the first radiating element;
- a second coil including a first end connected to the second radiating element and a second end connected to ground and is electromagnetically coupled to the first coil;
- a first phase adjusting element including a first end connected to the power supply circuit and a second end connected to the ground to adjust a phase difference between a first current flowing through the first radiating element and a second current flowing through the second radiating element;
- and
- a second phase adjusting element including a first end connected to the first end of the second coil and a second end connected to the ground to adjust the phase difference between the first current flowing through the first radiating element and the second current flowing through the second radiating element.
4 more elements
Dependencies are inferred from the claim text.