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Wireless communication apparatus for simultaneously performing multiple wireless communications

  • US 8,155,599 B2
  • Filed: 09/11/2007
  • Issued: 04/10/2012
  • Est. Priority Date: 09/11/2006
  • Status: Active Grant
First Claim
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1. A wireless communication apparatus, comprising:

  • a first antenna element (101) for transmitting a first radio signal in a first frequency band (B1) used for a first communication system, and receiving a second radio signal in the first frequency band (B1);

    a second antenna element (102) for receiving the second radio signal;

    a transmitter circuit (151a) for generating the first radio signal and transmitting the first radio signal from the first antenna element (101) through a first filter (121) and a first matching circuit (111);

    a first receiver circuit (151b, 151c) for performing at least one of receiving processes including a first receiving process of receiving the second radio signal received by the first antenna element (101), through the first matching circuit (111) and the first filter (121), and a second receiving process of receiving the second radio signal received by the second antenna element (102), through a second matching circuit (113, 113A) and a second filter (123, 123A); and

    a second receiver circuit (152) for receiving a third radio signal in a second frequency band (B2H) used for a second communication system and close to the first frequency band (B1), and receiving a fourth radio signal in a third frequency band (B2L) used for the second communication system and far from the first frequency band (B1) and different from the second frequency band (B2H),wherein the first matching circuit (111) matches an impedance of the first antenna element (101) to an impedance of the first filter (121) in the first frequency band (B1), the first filter (121) passing a radio signal in the first frequency band (B1),wherein the second matching circuit (113, 113A) matches an impedance of the second antenna element (102) to an impedance of the second filter (123, 123A) in the first frequency band (B1), the second filter (123, 123A) passing a radio signal in the first frequency band (B1), andwherein the wireless communication apparatus further comprises;

    a third matching circuit (112, 112A, 112B) for matching an impedance of the first antenna element (101) to an impedance of a third filter (122, 122A, 128) in the third frequency band (B2L), the third filter (122, 122A, 128) passing a radio signal in the third frequency band (B2L);

    a fourth matching circuit (114, 114A, 114B) for matching an impedance of the second antenna element to an impedance of a fourth filter (124, 124A, 129) in the second frequency band (B2H), the fourth filter (124, 124A, 129) passing a radio signal in the second frequency band (B2H); and

    a controller (160, 160B, 160C, 160D, 160H) for controlling a first switch (141, 145) to connect the second receiver circuit (152) receiving the third radio signal, to the second antenna element (102) not transmitting the first radio signal, through the fourth filter (124, 124A, 129) and the fourth matching circuit (114, 114A, 114B), when the transmitter circuit (151a) transmits the first radio signal.

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