Radar apparatus with jamming indicator and receiver device...

G - Physics – 01 – S

Patent

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G01S 7/36 (2006.01)

Patent

CA 2044044

The invention relates to a radar apparatus having a wideband preselector filter (15), a wideband preamplifier (16), a narrowband IF filter (19) and a jamming indicator (11). In order to obtain a warning against a jammer being active within the large bandwidth of the preselector filter (15) but outside the narrowband IF filter (19), the jammer indicator (11) has the same bandwidth as the wideband preselector filter and is connected after the preamplifier (16), but before the narrowband IF filter (19). A warning is necessary as a jammer of this type may greatly reduce the sensitivity of the radar apparatus by saturating the preamplifier (16).

L'invention a pour objet un appareil radar comportant un filtre présélecteur à bande large (15), un préamplificateur à large bande (16), un filtre FI à bande étroite (19) et un indicateur d'interférence (11). Afin d'être averti de l'activité d'un brouilleur dans la bande large du filtre présélecteur (15) mais à l'extérieur du filtre FI à bande étroite (19), l'indicateur d'interférence (11) a la même largeur de bande que le filtre présélecteur à bande large et est connecté après le préamplificateur (16), mais avant le filtre FI à bande étroite (19). Un avertissement est nécessaire étant donné qu'un brouilleur de ce type peut réduire grandement la sensibilité de l'appareil radar en saturant le préamplificateur (16).

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