TY - GEN
T1 - Design of a 40Watt Ultra broadband linear power amplifier using LDMOSFETs
AU - Seo, Mincheol
AU - Kim, Kyungwon
AU - Kim, Minsu
AU - Kim, Hyungchul
AU - Jeon, Jeongbae
AU - Sim, Jaewoo
AU - Park, Myungkyu
AU - Yang, Youngoo
PY - 2010
Y1 - 2010
N2 - A 40Watt linear power amplifier based on silicon LDMOSFETs is presented. It has ultra broadband characteristics from 2 to 512MHz. The proposed amplifier has a push-pull structure using Guanella 11 and 14 transmission line transformers for its input and output baluns, respectively. A negative feedback network is also adopted for broadband operation with a flat gain response. To achieve high linearity, the bias condition for almost class-A operation is applied. Based on the proposed concept, a two-stage broadband amplifier is implemented. A P1dB of more than 40Watt (46dBm) is achieved over the entire frequency band. The implemented power amplifier exhibits a power gain response of 43.3 ±1.8dB and a PAE of greater than 28.3% at each P1dB over the band. The second- and third-harmonic distortions are below 28.5dBc and 19dBc at each P1dB, respectively. Furthermore, at an average output power level of 41dBm for the two-tone signal input, which has a tone spacing of 1MHz, the IMD3 over the entire band is below 30.1dBc.
AB - A 40Watt linear power amplifier based on silicon LDMOSFETs is presented. It has ultra broadband characteristics from 2 to 512MHz. The proposed amplifier has a push-pull structure using Guanella 11 and 14 transmission line transformers for its input and output baluns, respectively. A negative feedback network is also adopted for broadband operation with a flat gain response. To achieve high linearity, the bias condition for almost class-A operation is applied. Based on the proposed concept, a two-stage broadband amplifier is implemented. A P1dB of more than 40Watt (46dBm) is achieved over the entire frequency band. The implemented power amplifier exhibits a power gain response of 43.3 ±1.8dB and a PAE of greater than 28.3% at each P1dB over the band. The second- and third-harmonic distortions are below 28.5dBc and 19dBc at each P1dB, respectively. Furthermore, at an average output power level of 41dBm for the two-tone signal input, which has a tone spacing of 1MHz, the IMD3 over the entire band is below 30.1dBc.
KW - broadband impedance transformer
KW - Broadband power amplifier
KW - feedback
KW - push-pull
UR - https://www.scopus.com/pages/publications/79955723721
M3 - Conference contribution
AN - SCOPUS:79955723721
SN - 9784902339222
T3 - Asia-Pacific Microwave Conference Proceedings, APMC
SP - 414
EP - 417
BT - 2010 Asia-Pacific Microwave Conference Proceedings, APMC 2010
T2 - 2010 Asia-Pacific Microwave Conference, APMC 2010
Y2 - 7 December 2010 through 10 December 2010
ER -