Size Reduction of a Quasi Class-E High Power Amplifier Using Defected Ground Structure

결함 접지 구조를 이용한 유사 E급 전력 증폭기의 소형화

  • Choi, Heung-Jae (Dept. of Info. & Comm. Engineering, Chonbuk National University) ;
  • Jeong, Yong-Chae (Dept. of Info. & Comm. Engineering, Chonbuk National University) ;
  • Lim, Jong-Sik (Dept. of Electric and Comm. Engineering, Soonchunhyang University) ;
  • Jung, Young-Bae (Antenna Technology Research Team, Electronics and Telecommunications Research Institute(ETRI)) ;
  • Eom, Soon-Young (Antenna Technology Research Team, Electronics and Telecommunications Research Institute(ETRI)) ;
  • Kim, Chul-Dong (Sewon Teletech, Inc.)
  • 최흥재 (전북대학교 정보통신공학과 및 반도체설계교육센터) ;
  • 정용채 (전북대학교 정보통신공학과 및 반도체설계교육센터) ;
  • 임종식 (순천향대학교 전기통신공학과) ;
  • 정영배 (한국전자통신연구원 안테나연구팀) ;
  • 엄순영 (한국전자통신연구원 안테나연구팀) ;
  • 김철동 (세원텔레텍(주))
  • Published : 2010.01.31


In this work, a reduced size 20W quasi class-E Power Amplifier(PA) with defected ground structure load-network is presented for WCDMA base station application. Harmonic impedances required for the class E operation are satisfied by applying the dumbbell and the asymmetric spiral DGS. Open impedance for 2nd harmonic frequency which has the highest power and nearly short impedances for other higher order harmonics are provided by the proposed DGS load-network. The maximum Power Added Efficiency(PAE) of 70.2 % at the output power of 43.1 dBm with the saturated power gain of 12.7 dB is achieved by the proposed quasi class-E PA, which is comparable to the performance of the reference class-E PA. Total size of the proposed class-E PA is only $50{\times}50\;mm^2$ and much smaller than the conventional class-E PA that is loaded with a number of open stubs.


Class-E;Power Amplifier;Defected Ground Structure


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