Adaptive antenna unit for mobile terminal
First Claim
1. An adaptive antenna unit which is adapted to a mobile terminal for making mobile communication and adaptively forms an antenna directivity in a direction of a base station which exchanges signals with the mobile terminal, comprising:
- an azimuth sensor to detect at least one of rotation, inclination and present position of the mobile terminal;
a transmitter-receiver section to adaptively control the antenna directivity in a direction in which a reception characteristic improves based on reception signals received from a plurality of antenna elements forming the antenna directivity, said plurality of antenna elements including parasitic antenna elements each terminated by a variable reactance element;
a section to correct the antenna directivity in the direction of the base station, based on the at least one of rotation, inclination and present position of the mobile terminal detected by the azimuth sensor; and
a section to control the antenna directivity by varying a reactance component of the variable reactance element of each of the parasitic antenna elements.
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Accused Products
Abstract
An adaptive antenna unit is adapted to a mobile terminal for making mobile communication and adaptively forms an antenna directivity in a direction of a base station which exchanges signals with the mobile terminal. The adaptive antenna unit is provided with an azimuth sensor to detect at least one of rotation, inclination and present position of the mobile terminal, a transmitter-receiver section to control the antenna directivity in a direction in which a reception characteristic improves based on reception signals received from a plurality of antenna elements forming the antenna directivity, and a mechanism for correcting the antenna directivity in the direction of the base station, based on the at least one of rotation, inclination and present position of the mobile terminal detected by the azimuth sensor.
44 Citations
17 Claims
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1. An adaptive antenna unit which is adapted to a mobile terminal for making mobile communication and adaptively forms an antenna directivity in a direction of a base station which exchanges signals with the mobile terminal, comprising:
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an azimuth sensor to detect at least one of rotation, inclination and present position of the mobile terminal;
a transmitter-receiver section to adaptively control the antenna directivity in a direction in which a reception characteristic improves based on reception signals received from a plurality of antenna elements forming the antenna directivity, said plurality of antenna elements including parasitic antenna elements each terminated by a variable reactance element;
a section to correct the antenna directivity in the direction of the base station, based on the at least one of rotation, inclination and present position of the mobile terminal detected by the azimuth sensor; and
a section to control the antenna directivity by varying a reactance component of the variable reactance element of each of the parasitic antenna elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A mobile terminal for making mobile communication with a base station by exchanging signals, comprising:
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a plurality of antenna elements to adaptively form an antenna directivity in a direction of the base station, and including parasitic antenna elements each terminated by a variable reactance element;
an azimuth sensor to detect at least one of rotation, inclination and present position of the mobile terminal;
a transmitter-receiver section to control the antenna directivity in a direction in which a reception characteristic improves based on reception signals received from the plurality of antenna elements;
a section to correct the antenna directivity in the direction of the base station, based on the at least one of rotation, inclination and present position of the mobile terminal detected by the azimuth sensor; and
a section to control the antenna directivity by varying a reactance component of the variable reactance element of each of the parasitic antenna elements. - View Dependent Claims (15, 16, 17)
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Specification