Title :
Implementation of a YBa/sub 2/Cu/sub 3/O/sub 7-x/ wideband real-time spectrum-analysis receiver
Author :
Lyons, W.G. ; Arsenault, D.R. ; Seaver, M.M. ; Boisvert, R.R. ; Sollner, T.C.L.G. ; Withers, R.S.
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
fDate :
3/1/1993 12:00:00 AM
Abstract :
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.<>
Keywords :
barium compounds; high-temperature superconductors; spectral analysers; superconducting integrated circuits; superconducting logic circuits; yttrium compounds; YBa/sub 2/Cu/sub 3/O/sub 7-x/; chirp filters; chirp-transform algorithm; compressed pulse; high temperature superconductor; high-speed semiconductor output circuits; video to emitter coupled logic; wideband real-time spectrum-analysis receiver; Chirp; Envelope detectors; Filters; Pulse circuits; Pulse compression methods; Pulse generation; Signal generators; Video compression; Voltage-controlled oscillators; Wideband;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
