Patents by Inventor Shih-Ping Liu

Shih-Ping Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Second harmonic terminations for high efficiency radio frequency dual-band power amplifier
    Patent number: 6236274
    Abstract: A high efficiency dual-band RF power amplifier has an output and/or input of a high frequency transistor well terminated at the second harmonic frequency for dual-band operation. Diode switches or voltage controlled varactors implement dual-band resonators such that they can offer low impedance at the second harmonic of each frequency band, while, in some cases, presenting high impedance at the fundamental frequency as an RF choke circuit.
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: May 22, 2001
    Assignee: Industrial Technology Research Institute
    Inventor: Shih-Ping Liu