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Machine translation
1. (WO1980002782) ANTENNA LOW-NOISE Q SPOILING CIRCUIT
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/002782    International Application No.:    PCT/US1979/000356
Publication Date: 11.12.1980 International Filing Date: 25.05.1979
IPC:
H01Q 7/08 (2006.01), H03H 11/46 (2006.01), H04B 1/18 (2006.01)
Applicants:
Inventors:
Priority Data:
US79/00356 25.05.1979 WO
Title (EN) ANTENNA LOW-NOISE Q SPOILING CIRCUIT
(FR) CIRCUIT DE DETERIORATION DE Q DE FAIBLE BRUIT D"UNE ANTENNE
Abstract: front page image
(EN)Input coupling circuit for detuning the Q of a high-Q ferrite rod antenna. A high impedence low-noise amplifier (4) is used to amplify the output signal from the LC resonant tank (L1, 1) of the rod antenna (M). A portion of the amplified signal is fed back directly into the magnetic circuit of the antenna tank. This negative feedback reduces the losses produced in the magnetic circuit due to the presence of nearby conductors. As a result of this reduction, an increase in the antenna sensitivity and a decrease in the cross-feed from other nearby antenna is produced.
(FR)Un circuit d"accouplement d"entrees de desyntonisation de Q d"une antenne a tige de ferrite ayant une valeur Q elevee. Un amplificateur de faible bruit d"impedance elevee (4) est utilise pour amplifier le signal de sortie provenant du reservoir resonnant LC (L1, 1) de l"antenne tige (M). Une partie du signal amplifie est renvoye directement dans le circuit magnetique du reservoir d"antenne. Cette reaction negative reduit les pertes produites dans le circuit magnetique dues a la presence des conducteurs a proximite. De cette reduction, il resulte une augmentation de la sensibilite de l"antenne et une diminution des interferences dues a d"autres antennes environnantes.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)