Abstract: An antenna structure for a carrier connected to a station by a coaxial cable comprises at least the following elements: a break delimiting a first portion of length H1 and a second portion of length H2, forming a radiating element isolated from a second section by means of a current isolator, at the break, the core of the coaxial cable from the lower face of the break is connected to the braid of the coaxial cable from the upper face of the break and the core of the coaxial cable from the upper face of the break is connected to the braid of the coaxial cable from the lower face of the break, the first upper portion has a recess in the coaxial cable suited to inserting a short circuit for signals whose frequency is equal to the operating frequency.

Abstract: An antenna structure for a carrier connected to a station by a coaxial cable comprises at least the following elements: a break delimiting a first portion of length H1 and a second portion of length H2, forming a radiating element isolated from a second section by means of a current isolator, at the break, the core of the coaxial cable from the lower face of the break is connected to the braid of the coaxial cable from the upper face of the break and the core of the coaxial cable from the upper face of the break is connected to the braid of the coaxial cable from the lower face of the break, the first upper portion has a recess in the coaxial cable suited to inserting a short circuit for signals whose frequency is equal to the operating frequency.

Abstract: The invention relates to a loop antenna system comprising a first electrically conductive filiform element forming a loop portion. The antenna system further comprises a second electrically conductive filiform element forming a loop portion, and the two filiform elements have different lengths (la, lb). The invention also relates to a vehicle including such an antenna system.

Abstract: A compact dual-channel antenna operating at least in two frequency bands, comprises at least the following elements: a coaxial cable connected to a reference ground, an antenna element designed to operate in the high-frequency band, having a length Linf, a counter-skirt with a length roughly corresponding to Linf and arranged around said antenna element, said duly surrounded antenna element being placed between the ground plane and an antenna element designed to operate in the low-frequency band, the assembly having a length Lsup designed to operate in the low-frequency band and consisting of the antenna element and the counter-skirt, fed via the core of said coaxial surrounding a magnetic element to form a winding, said antenna element being fed via a braid of the sheath of said coaxial.

Abstract: A low-profile broadband multiple antenna, comprises: a dipole arranged in the top part of said antenna, said dipole comprising at least one first top antenna element connected to the core of a multi-axial cable comprising a core and n sheaths and the bottom individual element of which is connected to the first sheath adjacent to the core, a connection device positioned between a top element of a dipole and the bottom element of said dipole the top element is connected to the sheath of index (k?1) of the multi-axial cable after the assembly comprising the core and the sheaths of index (1 to k?1) has been wound in Q turns around a magnetic core and the bottom element of the dipole is connected to the sheath of index k, and said connection device comprises at least one single-wire winding of P turns on the same magnetic core linking said bottom element of said dipole to the sheath of index (k?1), at the point corresponding to the start of the winding in order to provide the broadband impedance matching and the p

Abstract: The invention relates to a loop antenna system comprising a first electrically conductive filiform element forming a loop portion. The antenna system further comprises a second electrically conductive filiform element forming a loop portion, and the two filiform elements have different lengths (la, lb). The invention also relates to a vehicle including such an antenna system.

Abstract: A low-profile broadband multiple antenna, comprises: a dipole arranged in the top part of said antenna, said dipole comprising at least one first top antenna element connected to the core of a multi-axial cable comprising a core and n sheaths and the bottom individual element of which is connected to the first sheath adjacent to the core, a connection device positioned between a top element of a dipole and the bottom element of said dipole the top element is connected to the sheath of index (k?1) of the multi-axial cable after the assembly comprising the core and the sheaths of index (1 to k?1) has been wound in Q turns around a magnetic core and the bottom element of the dipole is connected to the sheath of index k, and said connection device comprises at least one single-wire winding of P turns on the same magnetic core linking said bottom element of said dipole to the sheath of index (k?1), at the point corresponding to the start of the winding in order to provide the broadband impedance matching and the p

Abstract: A compact dual-channel antenna operating at least in two frequency bands, comprises at least the following elements: a coaxial cable connected to a reference ground, an antenna element designed to operate in the high-frequency band, having a length Linf, a counter-skirt with a length roughly corresponding to Linf and arranged around said antenna element, said duly surrounded antenna element being placed between the ground plane and an antenna element designed to operate in the low-frequency band, the assembly having a length Lsup designed to operate in the low-frequency band and consisting of the antenna element and the counter-skirt, fed via the core of said coaxial surrounding a magnetic element to form a winding, said antenna element being fed via a braid of the sheath of said coaxial.

Abstract: A wideband antenna system is capable of radiating or receiving radio-frequency signals in a given frequency band, comprising at least two substantially collinear radiating elements, wherein each element radiates in one frequency band, a first radiating element working in the [Fhinf, Fhsup] frequency band, a second radiating element working in the [Fminf, Fmsup] frequency band. At the hinge frequencies, these two elements participate in the radiation.

Abstract: A wideband antenna system is capable of radiating or receiving signals in a low-frequency band [Fbb, Fbh] covering more than one octave and a high-frequency band [Fhb, Fhh] with Fhb>=2Fbh comprising at least one power supply device (4) powering at least one upper radiating element (1) and at least one lower radiating element (2). The lower radiating element (2) is provided with at least one antenna assembly (10) adapted to radiating in the high-frequency band [Fhb, Fhh]. Application to RF signals. FIG. 3 to be published.

Abstract: Antenna system composed of (N+1) virtually identical radiating structures with N greater than or equal to 1, said (N+1) structures being arranged parallel to each other and each radiating structure being connected to a power supply and impedance matching device. Use for frequency ranges between 1.5 to 30 MHz.

Abstract: A wideband antenna system is capable of radiating or receiving signals in a low-frequency band [Fbb, Fbh] covering more than one octave and a high-frequency band [Fhb, Fhh] with Fhb>=2Fbh comprising at least one power supply device (4) powering at least one upper radiating element (1) and at least one lower radiating element (2). The lower radiating element (2) is provided with at least one antenna assembly (10) adapted to radiating in the high-frequency band [Fhb, Fhh]. Application to RF signals.

Abstract: A dipole antenna with a radiating structure comprises at least one device adapted to the conversion of analog signals into digital signals and/or digital signals into analog signals, said device being positioned in a part of the antenna that is insulated from electromagnetic waves or phenomena The antenna can be used in radiocommunications systems.

Abstract: Antenna system composed of (N+1) virtually identical radiating structures with N greater than or equal to 1, said (N+1) structures being arranged parallel to each other and each radiating structure being connected to a power supply and impedance matching device. Use for frequency ranges between 1.5 to 30 MHz.

Abstract: A dipole antenna with a radiating structure comprises at least one device adapted to the conversion of analog signals into digital signals and/or digital signals into analog signals, said device being positioned in a part of the antenna that is insulated from electromagnetic waves or phenomena The antenna can be used in radiocommunications systems.

Abstract: The invention concerns detachable whip antennae with capacitive load wherein the load does not need to contribute to the antenna mechanical strength. To achieve this, the entire load (3) is inserted in the conductor strand (2f-21-33-32-2n) of a radiating segment of the antenna, the mechanical strength being provided by a hollow plastic insulating tube (20) reinforced with glass fibres, which acts as support for the conductor strand and as housing for the load and said load consists of a metal enclosure (33) wherein penetrates the insulated part of an electric cable (32). The invention is particularly applicable to whip antennae designed for mobile stations.

Abstract: A variable geometry antenna including first and second conducting sections and electrically separated by a gap, and a sliding switching module assigned to the gap. The sliding switching module includes a mechanical relay, a moveable rod having a first end secured to a conducting piece included in the mechanical relay and configured to slide parallel to the first and second conducting sections so as to couple the first and second conducting sections, and a control mechanism.

Abstract: The invention relates chiefly to double antennas for metric and decimetric waves, designed for vehicles. The antenna comprises a single-pole antenna for low frequencies surmounted by a dipole type antenna for high frequencies. The supply cable of the dipole antenna has an external conductor used to form the single-pole antenna above the ground plane. Beneath the ground plane, this external conductor is wound in turns to constitute the secondary winding of a transformer for the supply of the single-pole antenna. Application especially to ground vehicles.