| 摘要 |
FIELD: radio engineering; detecting frequency-hopping radio stations on air, determining their direction and useful frequency spectrum. ^ SUBSTANCE: proposed radio transmission detector incorporates provision for automatically taking decision on presence of frequency-hopping (FH) signals, presence of only one antenna with continuously revolving directivity pattern, for analyzing amplitude spectrum with unattended segmental time overlap of its rotation affording on-line separation of unknown signals; discrete rotation of directivity pattern along with its comparison with standard makes it possible to use this detector in mobile radio monitoring facilities. ^ EFFECT: simplified design, reduced time and provision for automatic detection of frequency-hopping signals. ^ 2 cl, 3 dwg
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