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Large area bolometers for millimeter-wave power calibration

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Abstract

An accurate monolithic power meter has been developed for millimeter-wave applications. The detector is a large-area Bismuth bolometer, integrated on a fused-Quartz substrate. It simply measures the temperature change caused by the absorption of millimeter-wave radiation. The power meter is simple to fabricate, inexpensive, and can be easily calibrated using a low-frequency network. The measured responsivity for a 50Ω bolometer, with an area of 1×1cm, at a bias of 1V. and a video modulation of 100Hz, is 1mV/W. The noise spectrum exhibits a 1/f rolloff till 1KHz, and is limited by the Johnson noise for higher frequencies. The NEP of the detector is 3μWHz−1/2 at a video modulation of 1KHz. It is possible to decrease the current NEP by fabricating bolometers with higher responsivities. Possible application areas are absolute power calibration and localized power density measurements at millimeter and submillimeter wavelengths.

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References

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Authors and Affiliations

  1. Electrical Engineering and Computer Science Department, The University of Michigan, 48109, Ann Arbor, Michigan

    Gabriel M. Rebeiz & Curtis C. Ling

  2. Division of Engineering and Applied Science, California Institute of Technology, 91125, Pasadena, California

    David B. Rutledge

Authors
  1. Gabriel M. Rebeiz
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  2. Curtis C. Ling
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  3. David B. Rutledge
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Rebeiz, G.M., Ling, C.C. & Rutledge, D.B. Large area bolometers for millimeter-wave power calibration. Int J Infrared Milli Waves 10, 931–936 (1989). https://doi.org/10.1007/BF01010389

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  • DOI: https://doi.org/10.1007/BF01010389

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