Conference Paper

A linear 70-95 GHz differential IQ modulator for E-band wireless communication

Microwave Electron. Lab., Chalmers Univ. of Technol., Goteborg, Sweden
DOI: 10.1109/MWSYM.2010.5518178 Conference: Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International
Source: IEEE Xplore


In this paper, a direct IQ modulator MMIC with a novel differential architecture, for high speed E-band wireless communication is presented. The IQ modulator consists of two balanced resistive mixer cells, on-chip marchand balun and differential branchline coupler for quadrature LO signal generation. When operating as a single side band mixer, it shows conversion loss of 11 dB and side-band suppression higher than 20 dB. LO to RF isolation and OIP3 have been measured to be more than 30 dB and 13 dBm respectively, throughout the E-band. To the authors' best knowledge this is the first presented resistive IQ-modulator suitable for the full E-band.

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    • "The system operation was demonstrated over a 35–65-GHz frequency range. In another attempt, an integrated wideband IQ modulator was designed and implemented [9]. The modulator benefited from a differential architecture to achieve better EVM. "
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