Radio transmission
Multiple-input-port and multiple-output-port amplifiers

     We have worked on some innovations in the field of radio transmission. The three papers below describe wireless receiver front-ends using multiple antennas such as the ones used in MIMO radio transmission schemes. We refer to these devices as MIMOmatch front-ends.

[B68] F. Broydé, E. Clavelier, "Taking advantage of mutual coupling in radio-communication systems using a multi-port antenna array", IEEE Antennas & Propagation Magazine, Vol. 49, No. 4, August 2007, pp. 208-220.

[B69] F. Broydé, E. Clavelier, "Multiple-input-port and multiple-output-port amplifier for wireless receivers", Technical Conferences Proceedings of the SAME 2007 forum, Sophia Antipolis, October 3-4, 2007.

[B90] F. Broydé, E. Clavelier, "The Noise Performance of a Multiple-Input-Port and Multiple-Output-Port Low-Noise Amplifier Connected to an Array of Coupled Antennas", International Journal of Antennas and Propagation, vol. 2011, Article ID 438478, 12 pages, doi:10.1155/2011/438478, Nov. 2011.

     The paper [B68] approaches the MIMOmatch concepts from the viewpoint of an antenna designer (in particular in Sections 5 and 8), whereas the paper [B69] discusses the design of a MIMOmatch front-end with the approach of a circuit designer. The paper [B90] discusses the concept of noise figures in the case of receiver front-ends using multiple antennas, and treats the special case of MIMOmatch front-ends.

     These innovations are covered by the following patents and published PCT applications:

[P30] United States Patent number US 7,642,849 of 5 January 2010, Multiple-input and multiple-output amplifier and French patent 06 00388 of 31 October 2008, Amplificateur à entrées multiples et sorties multiples. Inventors: Frédéric Broydé & Evelyne Clavelier.

[P33] International application PCT/IB2007/001344 of 26 April 2007 (WO 2008/001168). Multiple-input and multiple-output amplifier using mutual induction in the feedback network. Inventors: Frédéric Broydé & Evelyne Clavelier. Priority French patent application 06 05633 of 23 June 2006.

[P34] International application PCT/IB2007/001589 of 5 June 2007 (WO 2008/010035). Method and device for radio reception using a plurarity of antennas. Inventors: Frédéric Broydé & Evelyne Clavelier. Priority French patent application 06 06502 of 18 July 2006.

[P41] International application PCT/IB2009/051358 of 31 March 2009 (WO 2010/004445), Multiple-input and multiple-output amplifier having pseudo-differential inputs. Inventors: Frédéric Broydé & Evelyne Clavelier. Priority: French patent application 08/03982 of 11 July 2008.

     The MIMO-SSFA (MIMO Series-Series Feedback Amplifier) used in these inventions is described in the following papers:

[B70] F. Broydé, E. Clavelier, "MIMO Series-Series Feedback Amplifiers", IEEE Trans. Circuits Syst. II: Express Briefs, Vol. 54, No. 12, December 2007, pp. 1037-1041.

[B79] F. Broydé, E. Clavelier, "Signal and noise analysis of an MIMO-SSFA", IEEE Trans. Circuits Syst. II: Express Briefs, Vol. 56, No. 6, June 2009, pp. 439-443.

     Note that [B70] is the reference [6] of [B68] and the reference [24] of [B69]. [B79] is the reference [23] of [B90].

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