Open Access

Direct Conversion EHM Transceivers Design for Millimeter-Wave Wireless Applications

  • Abbas Mohammadi1Email author,
  • Farnaz Shayegh2,
  • Abdolali Abdipour1 and
  • Rashid Mirzavand1
EURASIP Journal on Wireless Communications and Networking20072007:032807

Received: 29 March 2006

Accepted: 15 November 2006

Published: 6 February 2007


A direct conversion modulator-demodulator with even harmonic mixers for fixed wireless applications is presented. The circuits consist of even harmonic mixers (EHMs) realized with antiparallel diode pairs (APDPs). A communication link is set up to examine the overall performance of proposed modulator-demodulator. The transmission of 16-QAM signal with 110Mbps data rate over fixed wireless link has been examined. We also evaluate the different levels of I/Q imbalances and DC offsets and use signal space concepts to analyze the bit error rate (BER) of the proposed transceiver using -ary QAM schemes. The results show that this structure can be efficiently used for fixed wireless applications in Ka band.


Authors’ Affiliations

Microwave and Wireless Communication Research Labratory, Electrical Engineering Department, Amirkabir University of Technology (Polytechnic)
Electrical and Computer Engineering Department, Concordia University


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© Abbas Mohammadi et al. 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.