Title :
Spurious phase modulation by crystal filters
Author :
Mallette, L.A. ; Ishikawa, K.Y. ; Varney, J.
Author_Institution :
Hughes Aircraft Co., Los Angeles, CA, USA
fDate :
Jan. 31 1993-Feb. 5 1993
Abstract :
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.<>
Keywords :
aerospace testing; band-pass filters; crystal filters; electron device testing; passive filters; phase modulation; crystal filters; passive four-pole lattice-type crystal bandpass filter; satellite thermal vacuum test; spurious phase modulation; spurious resonance; Band pass filters; Bandwidth; Bit error rate; Crystals; Frequency; Lattices; Phase modulation; Satellites; Temperature; Testing;
Conference_Titel :
Aerospace Applications Conference, 1993. Digest., 1993 IEEE
Conference_Location :
Steamboat, CO, USA
Print_ISBN :
0-7803-0980-4
DOI :
10.1109/AERO.1993.255334
