Information device incorporating wireless communication antenna
First Claim
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1. An information device comprising:
- a body;
a diversity antenna which is attached to said body and performs wireless communication in a first frequency band; and
a dual-band antenna which is attached to said body and performs wireless communication in the first frequency band and a second frequency band.
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Abstract
In this invention, a diversity antenna and dual-band antenna are attached to the display portion of the portable information device. The dual-band antenna is connected to a Bluetooth circuit and wireless LAN 802.11a reception circuit. The diversity antenna is connected to a wireless LAN 802.11a transmission circuit. The Bluetooth circuit is not influenced by the wireless LAN 802.11a transmission system circuit. This invention can provide a compact portable information device.
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Citations
12 Claims
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1. An information device comprising:
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a body;
a diversity antenna which is attached to said body and performs wireless communication in a first frequency band; and
a dual-band antenna which is attached to said body and performs wireless communication in the first frequency band and a second frequency band. - View Dependent Claims (2, 3, 4, 5)
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6. An information device comprising:
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a diversity antenna which performs wireless communication in a first frequency band;
a dual-band antenna which performs wireless communication in the first frequency band and a second frequency band;
a transmission circuit which outputs a transmission signal transmitted in the first frequency band from said diversity antenna;
a reception circuit which receives a reception signal in the first frequency band that is received by said diversity antenna;
a communication circuit which performs wireless communication in the second frequency band by using said dual-band antenna;
a switch which is connected between said diversity antenna and said transmission and reception circuits, connects said transmission circuit to said diversity antenna when a signal is output from said transmission circuit, and connects said reception circuit to said diversity antenna when a signal is received by said reception circuit;
a first filter which is connected to said dual-band antenna and passes a signal in the first frequency band;
a second filter which is connected between said dual-band antenna and said communication circuit and passes a signal in the second frequency band; and
a diversity switch which compares reception power of a signal that is received by said dual-band antenna and passed through said first filter with reception power of a signal which is received by said diversity antenna and passed through said switch, and outputs a larger-power signal to said reception circuit. - View Dependent Claims (7)
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8. An antenna board comprising:
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a first ground pattern to obtain a first signal in a first frequency band;
a second ground pattern to obtain a second signal in a frequency band lower than the first frequency band together with the first ground pattern;
a filter which is connected between the first and second ground patterns, and passes the second signal; and
an antenna connected to the first and second ground patterns. - View Dependent Claims (9, 10, 11, 12)
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Specification