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Principles of Impedance Matching in Photoconductive Antennas

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Abstract

The principles of impedance matching in photoconductive antennas in comparison with conventional antennas are described. Because of the optical nature of the input signal in photoconductive antennas and the dependence of photoconductor conductance on the optical pump power, the optimum photoconductor impedance is not necessarily determined by the complex conjugate of antenna impedance. Using the equivalent circuit model of photoconductive antennas, the photoconductor impedance optimization criteria are evaluated according to the photoconductive antenna structure and operational settings.

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Acknowledgements

The authors gratefully acknowledge the financial support from DARPA Young Faculty Award (# N66001-10-1-4027), NSF Career Award (# N00014-11-1-0096), ONR Young Investigator Award (# N00014-12-1-0947), and ARO Young Investigator Award (# W911NF-12-1-0253).

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Authors and Affiliations

  1. Electrical Engineering and Computer Science Department, University of Michigan, Ann Arbor, 1301 Beal Ave, Ann Arbor, MI, 48109, USA

    Christopher W. Berry & Mona Jarrahi

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  1. Christopher W. Berry
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  2. Mona Jarrahi
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Correspondence to Mona Jarrahi.

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Berry, C.W., Jarrahi, M. Principles of Impedance Matching in Photoconductive Antennas. J Infrared Milli Terahz Waves 33, 1182–1189 (2012). https://doi.org/10.1007/s10762-012-9937-3

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  • DOI: https://doi.org/10.1007/s10762-012-9937-3

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