@inproceedings{0fdff5d5f6c14f62ae84f0927fc39b82,
title = "A low spurious 400M-6GHz SiGe-MMIC direct conversion transceiver using 2fLO LO switching configuration for cognitive radio",
abstract = "A low spurious SiGe-MMIC direct conversion transceiver using 2f LO LO switching configuration for cognitive radio is described. In the proposed configuration, LO signals for Tx and Rx blocks are generated by frequency divider behind switching circuits. By applying this configuration to the transceiver, the offset frequency of maximum Tx spurious in FDD mode is doubled compared to the conventional configuration. Also, theoretical analysis shows that the proposed configuration can lower LO signal spurious level by 12dB. Through these effects, receiver sensitivity degradation by Tx signal can be avoided and required characteristics of Tx BPF is relaxed. The direct conversion transceiver MMIC using 2fLO LO switching configuration is fabricated in 0.18μm SiGe-BiCMOS process. Measured results show a high modulation accuracy over 400M-6GHZ, and low Tx spurious characteristics.",
keywords = "Cognitive radio, Direct conversion, FDD, MMICs, Multi-band, Multi-mode, TDD, Tx spurious",
author = "Koji Tsutsumi and Fumiki Onoma and Jun Koide and Mikio Uesugi and Noriharu Suematsu and Hiroshi Harada",
year = "2008",
month = sep,
day = "25",
doi = "10.1109/RFIC.2008.4561505",
language = "English",
isbn = "9781424418091",
series = "Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium",
pages = "585--588",
booktitle = "Proceedings of the 2008 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2008",
note = "2008 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2008 ; Conference date: 15-06-2008 Through 17-06-2008",
}