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Antenna device with a first and second antenna

  • US 7,142,824 B2
  • Filed: 08/28/2003
  • Issued: 11/28/2006
  • Est. Priority Date: 10/07/2002
  • Status: Expired due to Fees
First Claim
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1. An antenna device comprising:

  • a first antenna which is matched with first, second, and third frequency bands;

    a second antenna which is matched with the third frequency band;

    a diplexer which distributes signals received from the first antenna into signals of the first frequency band and signals of the second and third frequency band;

    a first switch unit which selects a first transmitter for transmitting signals of the first frequency band or a first receiver for receiving signals of the first frequency band, and connects the selected one to the diplexer;

    a second switch unit which selects a second receiver for receiving signals of the second frequency band or a second transmitter for transmitting signals of the second frequency band, and connects the selected one to the diplexer; and

    a third switch unit which selects the second antenna or diplexer, and connects the selected one to a transmitter/receiver for transmitting and receiving signals of the third frequency band.

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