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Metamaterial power amplifier systems

  • US 8,704,593 B2
  • Filed: 07/02/2013
  • Issued: 04/22/2014
  • Est. Priority Date: 02/18/2009
  • Status: Active Grant
First Claim
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1. A bias circuit for biasing a transistor, comprising:

  • a first transmission line (“

    TL”

    ) having a first end and a second end;

    a second TL having a third end and a fourth end;

    a third TL comprising a composite right and left handed (“

    CRLH”

    ) structure and having a fifth end and a sixth end;

    whereinthe first TL, the second TL and the third TL are coupled radially to form a common portion with the first end, third end and the fifth end;

    the first TL is configured to receive a bias signal from an external supply through the second end; and

    the second TL is configured to send the bias signal to an RF signal path through the fourth end to bias the transistor coupled to the RF signal path.

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