TY - GEN
T1 - A 5GHz-band SiGe-MMIC quadrature modulator using a circular polyphase filter for 1Gbps transmission
AU - Nakajima, Kensuke
AU - Suematsu, Noriharu
AU - Murakami, Keishi
AU - Takagi, Tadashi
AU - Nakase, Hiroyuki
AU - Isota, Yoji
AU - Tsubouchi, Kazuo
PY - 2005/12/1
Y1 - 2005/12/1
N2 - A 5GHz-band SiGe-MMIC direct conversion quadrature modulator using a circular polyphase filter for high data rate is described. High I/Q vector accuracy is achieved using a circular polyphase filter with a completely symmetric layout as a 90 degrees LO power divider. By combining high cut-off frequency baseband amplifiers and broad-band unit mixers, a fabricated quadrature modulator shows the EVM of 3.3 %rms at 5.5 GHz using 64-QAM OFDM signals with the channel bandwidth of 204 MHz, which corresponds to the data rate of 1.161 Gbps.
AB - A 5GHz-band SiGe-MMIC direct conversion quadrature modulator using a circular polyphase filter for high data rate is described. High I/Q vector accuracy is achieved using a circular polyphase filter with a completely symmetric layout as a 90 degrees LO power divider. By combining high cut-off frequency baseband amplifiers and broad-band unit mixers, a fabricated quadrature modulator shows the EVM of 3.3 %rms at 5.5 GHz using 64-QAM OFDM signals with the channel bandwidth of 204 MHz, which corresponds to the data rate of 1.161 Gbps.
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U2 - 10.1109/EUMC.2005.1610092
DO - 10.1109/EUMC.2005.1610092
M3 - Conference contribution
AN - SCOPUS:33847097967
SN - 2960055128
SN - 9782960055122
T3 - 35th European Microwave Conference 2005 - Conference Proceedings
SP - 979
EP - 982
BT - 35th European Microwave Conference 2005 - Conference Proceedings
T2 - 2005 European Microwave Conference
Y2 - 4 October 2005 through 6 October 2005
ER -