Wireless communication device and mobile phone terminal using the same
First Claim
1. A wireless communication device comprising:
- a first receiver circuit for inputting a received signal received by a first antenna, corresponding to the frequency division duplex (FDD) system;
a second receiver circuit for inputting a received signal received by a second antenna, corresponding to the FDD system; and
a local oscillator for supplying in common the local oscillated frequency to the first and the second receiver circuits, wherein the received signals received by the first antenna and the second antenna are synthesized with each other to be obtained as the received signal, and wherein the first and the second receiver circuits and the local oscillator are formed in the same semiconductor device.
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Accused Products
Abstract
A multi-band multi-mode wireless communication device comprises a first antenna, a second antenna, a first transmitter circuit corresponding to the FDD system, a first receiver circuit and a second receiver circuit, a first transmitter circuit and a third receiver circuit corresponding to the TDD system, a duplexer, an SP3T switch, and a base-band signal processor. The second transmitter circuit, third receiver circuit and duplexer are connected with each other via the first antenna and the SP3T switch, the duplexer is connected to the first transmitter circuit and the first receiver circuit, and the second antenna is connected to the second receiver circuit. The received signals corresponding to the FDD system received by the first and second antennas are inputted to the base-band signal processor via the first and second receiver circuits and are then synthesized therein.
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Citations
20 Claims
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1. A wireless communication device comprising:
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a first receiver circuit for inputting a received signal received by a first antenna, corresponding to the frequency division duplex (FDD) system;
a second receiver circuit for inputting a received signal received by a second antenna, corresponding to the FDD system; and
a local oscillator for supplying in common the local oscillated frequency to the first and the second receiver circuits, wherein the received signals received by the first antenna and the second antenna are synthesized with each other to be obtained as the received signal, and wherein the first and the second receiver circuits and the local oscillator are formed in the same semiconductor device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A wireless communication device by utilizing not three but two antennas for realizing a multi-band multi-mode wireless communication, the wireless communication device comprising:
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a first receiver circuit applicable to a frequency division duplex communication system;
a second receiver circuit applicable to the frequency division duplex communication system; and
a third receiver circuit applicable to a wireless communication system being different from the frequency division duplex communication system. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A cellular phone terminal comprising:
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two antennas;
a first receiver circuit and a second receiver circuit corresponding to the FDD system;
a third receiver circuit for wireless communication system different from the FDD system;
a switch for changing over the connecting state between the two antennas and the receiver circuit; and
a base-band signal processor, wherein the base-band signal processor has the function to control switching of the switch in accordance with the communication system. - View Dependent Claims (18, 19, 20)
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Specification