Thomson Licensing S.a.

Fran&ccedil;oise Le Bolzer

Ali Louzir

Franck Thudor

Philippe Minard

Bernard Denis

Fran&ccedil;ois Baron

The present invention relates to a planar antenna carried by a substrate including a slot ( ) consisting of a closed curve dimensioned in order to operate at a given frequency and fed by a feed line ( ) positioned so that the slot lies in a short-circuit plane of the feed line. This antenna includes, in parallel on the slot , at least one switching means capable of assuming a closed state or an open state so as to modify the operating frequency band of the planar antenna. This antenna is particularly suitable for domestic wireless networks.

Planar antennas of the slot type

Compact, planar antenna made on a substrate comprising an annular slot which is dimensioned to operate at a given frequency and which is placed in a short-circuit plane of a line via which the antenna slot is fed. A second slot feed line is symmetrically disposed with respect to the first line in the line short-circuit plane common to them. Each of the lines, furnished with a port, is connected to a switching facility so as to allow the feeding of the antenna through one or the other of the two ports.

Compact, planar antenna with two ports and terminal comprising same

The present invention relates to a device for receiving/transmitting electromagnetic waves with omnidirectional radiation of the type comprising: a first set ( ) of means for receiving/transmitting waves with longitudinal radiation of the printed antenna type, the said means being arranged in order to receive a wide azimuthal sector and at least a second means ( ) for receiving/transmitting waves with transverse radiation of the printed antenna type, the second means having radiation complementary to the radiation of the first means, and means ( ) capable of connecting in emission the said first and second wave receiving/transmitting means. The invention is especially applicable to domestic networks.

Device for receiving/transmitting electromagnetic waves with omnidirectional radiation

Planar antenna carried by a substrate comprising an annular slot, which is dimensioned to operate at a given frequency and which is fed via a line ( ), such as a microstrip line, in a short-circuit plane of which the slot is situated. The annulus formed by this slot ( ), is deformed as indentations in at least one zone of the plane in which the electric field is a minimum for the given frequency and a given mode, this making it possible to obtain a lengthening of the slot perimeter with respect to an annular slot ( ), of corresponding circular shape, without surface extension of the substrate zone wherein the slot is made.

Compact annular-slot antenna

The present invention relates to a device for the reception and/or the transmission of electromagnetic signals comprising at least two means of reception and/or of transmission of electromagnetic signals of the slot-fed antenna ( ) type and means of connection for connecting at least one of the said means of reception and/or of transmission to means of utilization of the multibeam signals, in which the means of connection consist of two feed lines ( ) connected by a connection element to the utilization means (P), the two lines being coupled electromagnetically with the slots of the slot-fed antennas, each line terminating in a switching element ( ) arranged in such a way as to simulate, as a function of a monitoring signal, an open circuit or a short circuit at the extremity of one of the lines and a short circuit or an open circuit at the extremity of the other line so as to obtain different radiation patterns.

Growing community of inventors

Rennes, France

Françoise Le Bolzer

Growing community of inventors

Rennes, France

Fran&ccedil;oise Le Bolzer

Françoise Le Bolzer