Resistive Sensor for Short High-Power Microwave Pulse Measurement in Millimeter Wave Range

V. Tamošiūnasa, Ž Kanclerisa, M. Dagysa, R. Simniškisa and F.J. Ageeb aSemiconductor Physics Institute, A. Goštauto 11, Vilnius, Lithuania bAFOSR/NE, 801 N. Randolph St., Arlington, VA 22203, USA

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Received: 22 08 2004;

We report on the numerical investigation of the resistive sensor for the 78-118 GHz range. A three-dimensional finite-difference time-domain method was applied to simulate the wave propagation within a waveguide segment with the semiconductor sensor attached to a wider wall of the wave-guide. The electric field distribution, voltage standing-wave ratio and the average electric field dependences on frequency have been determined for several sets of dimensions and specific resistances of the sample. It is demonstrated that a proper selection of the dimensions and specific resistance of the sample can compensate the waveguide dispersion and the decrease of the electron heating effect with frequency. Therefore, a nearly constant sensitivity of the sensor can be obtained for the entire frequency range.

DOI: 10.12693/APhysPolA.107.420 PACS numbers:72.20.Ht, 72.30.+q, 85.30.De