US 12,273,078 B2
Power amplifier evaluation method and measurement system
Kiichiro Takenaka, Kyoto (JP); Masahiro Ito, Kyoto (JP); Yuuma Noguchi, Kyoto (JP); Daiji Nagashima, Kyoto (JP); and Hidetoshi Matsumoto, Kyoto (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto (JP)
Filed on Mar. 23, 2021, as Appl. No. 17/209,796.
Claims priority of application No. 2020-052656 (JP), filed on Mar. 24, 2020.
Prior Publication US 2021/0305950 A1, Sep. 30, 2021
Int. Cl. H03F 3/24 (2006.01)
CPC H03F 3/24 (2013.01) [H03F 2200/102 (2013.01); H03F 2200/324 (2013.01); H03F 2200/393 (2013.01); H03F 2200/451 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A power amplifier evaluation method comprising:
modulating a radio frequency signal having a constant amplitude with a digital modulation signal, thereby generating a radio frequency input signal whose amplitude changes in a stepwise manner;
inputting the radio frequency input signal into a power amplifier, the power amplifier being an evaluation target; and
measuring a radio frequency output signal of the power amplifier in each of a plurality of measurement periods, each measurement period being a time period in which the amplitude of the radio frequency input signal is constant and different than another measurement period,
wherein adjacent measurement periods are separated by non-measurement periods in which the radio frequency output signal is not measured.