TY - GEN
T1 - ASK and Pi/4-QPSK dual mode SiGe-MMIC transceiver for 5.8GHz DSRC terminals having stabilized amplifier chain
AU - Shinjo, Shintaro
AU - Tsutsumi, Koji
AU - Mori, Kazutomi
AU - Okada, Hiroshi
AU - Inoue, Masahiro
AU - Suematsu, Noriharu
PY - 2008
Y1 - 2008
N2 - A high integrated SiGe-MMIC transceiver having voltage controlled oscillator (VCO), phase locked loop (PLL), dual-transmit block for amplitude shift keying (ASK) mode and pi/4-quadrature phase shift keying (QPSK) mode, and common receiver block for the dual modes is developed for 5.8GHz dedicated short range communications (DSRC) terminals. To obtain stability of transceiver using differential configuration, which has on-chip closed loops generated by common ground/ Fee pad arrangement and differential pairs, the stabilized MMIC design method based on the loop analysis is introduced to it. In the loop analysis, the both on-chip loops of differential mode and common mode are considered, the maximum loop gain of less than -3dB all over the frequency range is defined as the absolute stabilized condition. The simulated results for each loops show that isolation resistors Inserted in bias feed line are effective for improving the stability. The effectiveness of the design method is evaluated by the measured results. The SiGe-MMIC transceiver having the stabilized amplifier chain is fabricated in 0.35μm SiGe-BiCMOS, and it achieves the adjacent channel power ratio (ACPR) of -38.2dBc under the ASK modulation and that of-47.2dBc under the pi/4-QPSK modulation.
AB - A high integrated SiGe-MMIC transceiver having voltage controlled oscillator (VCO), phase locked loop (PLL), dual-transmit block for amplitude shift keying (ASK) mode and pi/4-quadrature phase shift keying (QPSK) mode, and common receiver block for the dual modes is developed for 5.8GHz dedicated short range communications (DSRC) terminals. To obtain stability of transceiver using differential configuration, which has on-chip closed loops generated by common ground/ Fee pad arrangement and differential pairs, the stabilized MMIC design method based on the loop analysis is introduced to it. In the loop analysis, the both on-chip loops of differential mode and common mode are considered, the maximum loop gain of less than -3dB all over the frequency range is defined as the absolute stabilized condition. The simulated results for each loops show that isolation resistors Inserted in bias feed line are effective for improving the stability. The effectiveness of the design method is evaluated by the measured results. The SiGe-MMIC transceiver having the stabilized amplifier chain is fabricated in 0.35μm SiGe-BiCMOS, and it achieves the adjacent channel power ratio (ACPR) of -38.2dBc under the ASK modulation and that of-47.2dBc under the pi/4-QPSK modulation.
KW - Communication terminals
KW - MMIC amplifiers
KW - MMIC mixers
KW - Modulation
KW - Transceivers
UR - http://www.scopus.com/inward/record.url?scp=57349093776&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=57349093776&partnerID=8YFLogxK
U2 - 10.1109/MWSYM.2008.4633021
DO - 10.1109/MWSYM.2008.4633021
M3 - Conference contribution
AN - SCOPUS:57349093776
SN - 9781424417810
T3 - IEEE MTT-S International Microwave Symposium Digest
SP - 1071
EP - 1074
BT - 2008 IEEE MTT-S International Microwave Symposium Digest, MTT
T2 - 2008 IEEE MTT-S International Microwave Symposium Digest, MTT
Y2 - 15 June 2008 through 20 June 2008
ER -