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Machine translation
1. (WO1981001747) A METHOD TO PREVENT A RADAR BEACON RESPOND TO RECEIVE RADAR PULSES ORIGINATING FROM THE SIDE LOBES OF A TRANSMITTER AND AN ARRANGEMENT TO CARRY OUT THE METHOD
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/001747    International Application No.:    PCT/SE1980/000325
Publication Date: 25.06.1981 International Filing Date: 08.12.1980
IPC:
G01S 13/76 (2006.01), G01S 13/78 (2006.01)
Applicants:
Inventors:
Priority Data:
7910168 11.12.1979 SE
Title (EN) A METHOD TO PREVENT A RADAR BEACON RESPOND TO RECEIVE RADAR PULSES ORIGINATING FROM THE SIDE LOBES OF A TRANSMITTER AND AN ARRANGEMENT TO CARRY OUT THE METHOD
(FR) PROCEDE POUR EMPECHER UN PHARE DE RADIODETECTION DE REPONDRE A DES IMPULSIONS RADAR RECUES PROVENANT DES LOBES LATERAUX D"UN EMETTEUR, ET DISPOSITIF POUR METTRE EN OEUVRE LE PROCEDE
Abstract: front page image
(EN)A method to prevent a radar beacon respond to received pulses from a vessel which originate from the side lobes of the vessel antenna. The carrier frequency of the radar signal pulses to and received by the beacon is measured and a value of this frequency is stored in the case that the amplitudes of the signal pulses exceed a certain high threshold level (Th). If signals after that are received which exceed a low threshold level (Tl) (but not the high) the carrier frequency of these is measured and the corresponding value is stored. Measuring two subsequent and equal carrier frequencies is considered as a criterion that a responding signal from the beacon responding to the second received signal should not be transmitted. An arrangement to carry out the method is described.
(FR)Procede pour empecher un phare de radiodetection de repondre a des impulsions recues a partir d"un bateau qui proviennent des lobes lateraux de l"antenne du bateau. La frequence porteuse des impulsions des signaux radar envoyee au phare et recue par celui-ci est mesuree et une valeur de cette frequence est memorisee dans le cas ou les amplitudes des impulsions des signaux depassent un certain niveau de seuil eleve (Th). Si des signaux sont recus par la suite et depassent un niveau de seuil bas (Tl) (mais non pas le haut niveau), la frequence porteuse de ces derniers est mesuree et la valeur correspondante est memorisee. La mesure de deux frequences porteuses consecutives et egales est consideree comme un critere pour qu"un signal de reponse de la part du phare repondant au second signal recu ne soit pas transmis. Description d"un dispositif pour mettre en oeuvre le procede.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)