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US 7,253,773 B2Granted
Radio module and radio communication apparatus with the radio module
AssigneeKabushiki Kaisha Toshiba
InventorsNorimichi Chiba, Hiromichi Suzuki
Life of this patent
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Abstract
A metal plate in the form of a strip, bent into a bracket shape, is provided on the surface of a circuit board opposite to the surface of the board facing a human body. The proximal end of the metal plate is connected to a ground pattern provided on the circuit board, close to an antenna power supply point, with the longitudinal direction of the plate adjusted parallel to the main polarization direction of an antenna element.
Claims17
A radio module connecting a radio circuit to an antenna via a signal line, comprising:
- a circuit board supporting the radio circuit, the circuit board comprising a ground pattern, a first surface, and a second surface that faces a human body, the second surface being opposite to the first surface;
- and
- a passive conductor provided on the second surface, the conductor bypassing part of a current flowing on the ground pattern from the antenna when the antenna is used, the conductor having a length corresponding to ¼ of a wavelenath of a radio frequency signal transmitted from or received by the antenna, and the conductor having a proximal end and a distal end, the proximal end being directly connected to the ground pattern and positioned within ¼ of a wavelength of the radio frequency signal of a power supply point of the antenna at which distribution of the current assumes a maximum value, and the distal end being open.
A radio communication apparatus comprising:
- an apparatus housing;
- an antenna attached to the apparatus housing via a holder;
- a circuit board supporting a radio circuit housed in the apparatus housing, the circuit board being provided with a signal line which connects the antenna to the radio circuit, the circuit board further comprising a ground pattern, a first surface, and a second surface that faces a human body, the second surface being opposite to the first surface;
- and
- a passive conductor provided on the second surface, the conductor bypassing part of a current flowing on the ground pattern from the antenna when the antenna is used, the conductor having a length corresponding to ¼of a wavelength of a radio frequency signal transmitted from or received by the antenna, and the conductor having a proximal end and a distal end, the proximal end being directly connected to the ground pattern and positioned within ¼of a wavelength of the radio frequency signal of a power supply point of the antenna at which distribution of the current assumes a maximum value, and the distal end being open.
2 more elements
Dependencies are inferred from the claim text.