Patents by Inventor Daiji NAGASHIMA

Daiji NAGASHIMA 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).

  • POWER AMPLIFIER EVALUATION METHOD AND MEASUREMENT SYSTEM
    Publication number: 20210305950
    Abstract: A radio frequency signal having a constant amplitude is modulated by a digital modulation signal and a radio frequency input signal whose amplitude changes stepwise is generated. The radio frequency input signal is input into a power amplifier that is an evaluation target. A period in which an amplitude of the radio frequency input signal is constant is defined as a measurement period and an output signal of the power amplifier is measured in each of measurement periods in which amplitudes of the radio frequency input signal are different from each other.
    Type: Application
    Filed: March 23, 2021
    Publication date: September 30, 2021
    Inventors: Kiichiro TAKENAKA, Masahiro ITO, Yuuma NOGUCHI, Daiji NAGASHIMA, Hidetoshi MATSUMOTO