High linearity SiGe-MMIC Q-MOD having self mixer current control circuit with output power detector for 0.4-5.8GHz cognitive radio transceiver

Shintaro Shinjo, Koji Tsutsumi, Fumiki Onoma, Noriharu Suematsu, Hiroshi Harada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

A 0.4-5.8GHz high linearity SiGe-MMIC quadrature-modulator (Q-MOD) having a novel self mixer current control circuit is described. This control circuit, which consists of an output power detector and an envelope current feedback circuit, is applied to unit mixers, and it automatically controls the mixer current according to the output power level. As a result, high linearity can be obtained. In simulation, the Q-MOD employing the proposed unit mixers shows the P1dB improvement of more than 2.6dB under the CW condition of the 0.4-5.8GHz frequency range compared with the conventional Q-MOD. In measurement, the Q-MOD achieves P1dB improvement of more than 3.0dB under the same condition. It also improves the maximum output power with EVM of 3.0% (Pout@EVM=3.0%) for both modulation conditions of UHF wireless systems (16QAM/OFDM, 0.4GHz) and IEEE 802.11a W-LAN (64QAM/OFDM, 5.2GHz).

Original languageEnglish
Title of host publicationProceedings of the 2008 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2008
Pages189-192
Number of pages4
DOIs
Publication statusPublished - 2008 Sep 22
Externally publishedYes
Event2008 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2008 - Atlanta, GA, United States
Duration: 2008 Jun 152008 Jun 17

Publication series

NameDigest of Papers - IEEE Radio Frequency Integrated Circuits Symposium
ISSN (Print)1529-2517

Other

Other2008 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2008
CountryUnited States
CityAtlanta, GA
Period08/6/1508/6/17

Keywords

  • MMIC mixers
  • MMIC transmitters
  • Mobile communication
  • Modulation
  • Wireless LAN

ASJC Scopus subject areas

  • Engineering(all)

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