Systems and methods of multiport amplifier (MPA) implementation system, including: at least one input matrix, including a plurality of complex modulators, wherein each complex modulator is configured to receive an input channel stream, a summation logic block, configured to sum the complex product of the plurality of complex modulators, and a dual Digital to Analog (DAC) converter, configured to receive summation digital complex output from the summation logic block, a plurality of RF modulators, wherein each RF modulator is configured to receive a dual analog output as baseband I/Q branches from a corresponding DAC converter, and a plurality of amplifiers, wherein each complex amplifier is configured to receive the output of a corresponding RF Modulator for amplification to an output RF matrix.
Systems and methods of multiport amplifier (MPA) implementation system, including: at least one input matrix, including a plurality of complex modulators, wherein each complex modulator is configured to receive an input channel stream, a summation logic block, configured to sum the complex product of the plurality of complex modulators, and a dual Digital to Analog (DAC) converter, configured to receive summation digital complex output from the summation logic block, a plurality of RF modulators, wherein each RF modulator is configured to receive a dual analog output as baseband I/Q branches from a corresponding DAC converter, and a plurality of amplifiers, wherein each complex amplifier is configured to receive the output of a corresponding RF Modulator for amplification to an output RF matrix.
H03F 1/32 - Modifications des amplificateurs pour réduire la distorsion non linéaire
H03F 3/21 - Amplificateurs de puissance, p.ex. amplificateurs de classe B, amplificateur de classe C comportant uniquement des dispositifs à semi-conducteurs
H03F 3/217 - Amplificateurs de puissance de classe D; Amplificateurs à commutation
H03F 3/38 - Amplificateurs de courant continu, comportant un modulateur à l'entrée et un démodulateur à la sortie; Modulateurs ou démodulateurs spécialement conçus pour être utilisés dans de tels amplificateurs
3.
A COMPACT MULTI SPOT BEAM COMMUNICATION SYSTEM FOR SMALL SATELLITE
A multi-beam transmit/receive device is disclosed. The device comprises a Circular Polarization Frequency Selective Surface (CPFSS) unit, a transmit (Tx) flat array antenna assembly with multi-bean flat array antenna and a receive (Rx) flat array antenna assembly with multi-bean flat array antenna. The Tx multi-beam antenna is poisoned with respect to the CPFSS unit so that its transmission is configured to be reflected by the CPFSS unit to a reflector and to be reflected by the reflector in a defined direction and the Rx multi-beam antenna is poisoned with respect to the CPFSS unit so that transmission that hits the reflector from the defined direction and passes through the CPFSS unit focuses on the Rx multi-beam antenna.
H01Q 15/00 - Dispositifs pour la réflexion, la réfraction, la diffraction ou la polarisation des ondes rayonnées par une antenne, p.ex. dispositifs quasi optiques
H01Q 1/28 - Adaptation pour l'utilisation dans ou sur les avions, les missiles, les satellites ou les ballons
4.
Compact multi spot beam communication system for small satellite
A multi-beam transmit/receive device comprises a Circular Polarization Frequency Selective Surface (CPFSS) unit, a transmit (Tx) flat array antenna assembly with multi-bean flat array antenna and a receive (Rx) flat array antenna assembly with multi-bean flat array antenna. The Tx multi-beam antenna is poisoned with respect to the CPFSS unit so that its transmission is configured to be reflected by the CPFSS unit to a reflector and to be reflected by the reflector in a defined direction and the Rx multi-beam antenna is poisoned with respect to the CPFSS unit so that transmission that hits the reflector from the defined direction and passes through the CPFSS unit focuses on the Rx multi-beam antenna.
H03F 3/19 - Amplificateurs à haute fréquence, p.ex. amplificateurs radiofréquence comportant uniquement des dispositifs à semi-conducteurs
H01Q 3/26 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante
H01Q 19/195 - Combinaisons d'éléments actifs primaires d'antennes avec des dispositifs secondaires, p.ex. avec des dispositifs quasi optiques, pour donner à une antenne une caractéristique directionnelle désirée utilisant des surfaces réfléchissantes comportant plusieurs surfaces réfléchissantes comprenant une surface réfléchissante principale concave associée à une surface réfléchissante auxiliaire où la surface réfléchissante se comporte aussi comme un filtre de polarisation ou comme un dispositif de polarisation
A system is disclosed for adaptively controlling transmission rate between first and second terminals. The system comprising a controller and a transmit unit. The controller comprising a computing unit, a storage unit and a memory unit. The transmit unit is to transmit signals over a communication link from the first terminal to the second terminal and the computing unit is adapted to receive indication of a signal-to-noise-ratio (SNR) of transmission in the communication link and to execute program stored in the memory unit to change the transmission rate of the transmit unit in response to changes in the SNR.
A foldable and deployable assembly for use to transfer RF signals comprises a RF transmitter/receiver adapted to operate in the RF range S and up, a transmit/receive horn unit to attach the assembly to an antenna operable in the RF range S and up and a foldable/deployable RF waveguide connected between the RF transmitter/receiver and the transmit/receive horn and operable in the RF range of S and up, the waveguide is formed as a hollow elongated piece made of at least one of silicone based shape memory composite carbon fiber reinforced silicone (CFRS) and graphite with silicone.
Generally, system and method for calibration an in-orbit satellite are provided. The method may comprise transmitting, by a Geosynchronous (GEO) satellite, a GEO satellite signal and receiving, by a Low Earth Orbiting (LEO) satellite, the GEO satellite signal when the LEO satellite crosses a predetermined transmission footprint of the GEO satellite at a predetermined LEO satellite location. The method may comprise determining, by a base station, a GEO satellite location at which the GEO satellite signal is received by the LEO satellite. The method may comprise comparing, by the base station, the transmitted GEO satellite signal and the received GEO satellite signal and further determining, by the base station, based on at least one of the comparison thereof, the predetermined LEO satellite location and the GEO satellite location, a GEO satellite transmission performance at a specific geographical location on ground.
A foldable and deployable assembly for use to transfer RF signals comprises a RF transmitter/receiver adapted to operate in the RF range S and up, a transmit/receive horn unit to attach the assembly to an antenna operable in the RF range S and up and a foldable/deployable RF waveguide connected between the RF transmitter/receiver and the transmit/receive horn and operable in the RF range of S and up, the waveguide is formed as a hollow elongated piece made of at least one of silicone based shape memory composite carbon fiber reinforced silicone (CFRS) and graphite with silicone.
Generally, system and method for calibration an in-orbit satellite are provided. The method may comprise transmitting, by a Geosynchronous (GEO) satellite, a GEO satellite signal and receiving, by a Low Earth Orbiting (LEO) satellite, the GEO satellite signal when the LEO satellite crosses a predetermined transmission footprint of the GEO satellite at a predetermined LEO satellite location. The method may comprise determining, by a base station, a GEO satellite location at which the GEO satellite signal is received by the LEO satellite. The method may comprise comparing, by the base station, the transmitted GEO satellite signal and the received GEO satellite signal and further determining, by the base station, based on at least one of the comparison thereof, the predetermined LEO satellite location and the GEO satellite location, a GEO satellite transmission performance at a specific geographical location on ground.
An antenna assembly tunable from remote comprising a main reflector a sub-reflector associated with the main reflector, and a feed adapted receive transmission illuminating the main reflector via the sub-reflector, or to transmit transmission to the main reflector via the sub-reflector. The sub-reflector comprising a plurality of actuators disposed over and attached to its outer face. Each of the actuators is adapted to locally deform the surface of the sub-reflector adjacent to that actuator in response to a change in the actuator position.
H01Q 19/19 - Combinaisons d'éléments actifs primaires d'antennes avec des dispositifs secondaires, p.ex. avec des dispositifs quasi optiques, pour donner à une antenne une caractéristique directionnelle désirée utilisant des surfaces réfléchissantes comportant plusieurs surfaces réfléchissantes comprenant une surface réfléchissante principale concave associée à une surface réfléchissante auxiliaire
H01Q 19/12 - Combinaisons d'éléments actifs primaires d'antennes avec des dispositifs secondaires, p.ex. avec des dispositifs quasi optiques, pour donner à une antenne une caractéristique directionnelle désirée utilisant des surfaces réfléchissantes où les surfaces sont concaves
11.
SYSTEM, DEVICE AND METHOD FOR TUNING A REMOTE ANTENNA
An antenna assembly tunable from remote comprising a main reflector a sub-reflector associated with the main reflector, and a feed adapted receive transmission illuminating the main reflector via the sub-reflector, or to transmit transmission to the main reflector via the sub- reflector. The sub-reflector comprising a plurality of actuators disposed over and attached to its outer face. Each of the actuators is adapted to locally deform the surface of the sub-reflector adjacent to that actuator in response to a change in the actuator position.
H01Q 19/10 - Combinaisons d'éléments actifs primaires d'antennes avec des dispositifs secondaires, p.ex. avec des dispositifs quasi optiques, pour donner à une antenne une caractéristique directionnelle désirée utilisant des surfaces réfléchissantes
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