Spurious phase modulation by crystal filters

Spurious phase modulation by crystal filters

A spurious phase modulation (PM) problem discovered during a satellite thermal vacuum test was traced to a supposedly passive component: a crystal filter. While a literature search showed that this phenomenon has been observed in the past, the effect does not seem to be widely known and is a possibl...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Mallette, L.A., Ishikawa, K.Y., Varney, J.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Band pass filters
Bandwidth
Bit error rate
Crystals
Frequency
Lattices
Phase modulation
Satellites
Temperature
Testing
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Beschreibung
Zusammenfassung:A spurious phase modulation (PM) problem discovered during a satellite thermal vacuum test was traced to a supposedly passive component: a crystal filter. While a literature search showed that this phenomenon has been observed in the past, the effect does not seem to be widely known and is a possible problem in some current designs. The PM was noted in a passive four-pole lattice-type crystal bandpass filter at high drive levels over a narrow temperature range. The modulation sidebands were within the 3-dB bandwidth of the filter and 20 dB below the carrier.< >
DOI:10.1109/AERO.1993.255334