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Implementation of a YBa/sub 2/Cu/sub 3/O/sub 7-x/ wideband real-time spectrum-analysis receiver

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6 Author(s)
W. G. Lyons ; Lincoln Lab., MIT, Lexington, MA, USA ; D. R. Arsenault ; M. M. Seaver ; R. R. Boisvert
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The implementation of a wideband real-time spectrum-analysis receiver based on YBa/sub 2/Cu/sub 3/O/sub 7-x/ chirp filters and a chirp-transform algorithm is presented. The integration of the high-T/sub c/ spectrum-analysis subsystem with high-speed semiconductor output circuits is demonstrated. A compressed pulse is obtained using a voltage-controlled oscillator to generate a flat-weighted chirp signal, and a Hamming-weighted YBa/sub 2/Cu/sub 3/O/sub 7-x/ chirp filter is used to compress the chirp signal into a pulse. The error sidelobe level of the compressed pulse response is -18 dB. Semiconductor circuits are included in the system for envelope detection of compressed pulses and video to emitter coupled logic (ECL) logic-level conversion.<>

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IEEE Transactions on Applied Superconductivity  (Volume:3 ,  Issue: 1 )