POST-DISTORTION LINEARITY DEVICE USING DIODE MIXER FOR INTER-MODULATION PERFORMANCE IMPROVEMENT OF POWER AMPLIFIER
摘要
PURPOSE: A post-distortion linear power amplifier is provided to improve power loss and efficiency according to a delay line which selects inter-modulation components at a rear stage of the power amplifier, and to compensate distortion properties of a main amplifier. CONSTITUTION: The first 90-degree hybrid coupler divides two input carrier waves into a liner path and a non-liner path. A variable phase converter receives the divided carrier wave at the linear path and compensates a phase error caused at the non-linear path. A variable attenuator receives an output signal of the variable phase converter and adjusts an amplitude difference for removing a main signal. A fixing attenuator receives the divided carrier wave at the non-linear path and adjusts inter-modulation generated in a mixer. A delay line compensates a delay time caused at the linear path.
申请公布号
KR20030022521(A)
申请公布日期
2003.03.17
申请号
KR20010055659
申请日期
2001.09.11
申请人
FIELDCOM COMPANY, LTD.;KIM, JONG HEON;MISSION TELECOM COMPANY, LTD.
发明人
CHO, GYEONG JUN;JANG, DONG HUI;KIM, JONG HEON;KIM, NAM YEONG;KIM, SANG HUI;LEE, BYEONG JE;LEE, JONG CHEOL;NA, GEUK HWAN;YOON, SIN YEONG