Systems and methods for maintaining a controlled power...

H - Electricity – 04 – B

Patent

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H04B 1/00 (2006.01)

Patent

CA 2761611

A multiband transceiver (200) including transmit sub-circuits (TSCs) arranged in parallel, a multiplexer (222) receiving RF signals from the TSCs at input ports (290, 292, 294), and a directional coupler (DC). Each TSC (210, 212, 214, 216, 218, 220) is configured to support communications in a respective frequency band. The multiplexer is configured to route signals from the input ports to a common output port (296) and to reduce harmonic distortion induced by the TSCs. DC (226) has an input port (1) connected to the common output port, a transmitted port (4) connected to an antenna port, and a coupled port (3) coupling a portion of the RF signal to a common feedback loop (CFL). The CFL (270) provides a feedback signal coupled to each TSC. Each TSC is responsive to the feedback signal for maintaining a controlled power output at the antenna port over a range of frequencies.

Un émetteur-récepteur multibande (200) comprend des circuits d'émission auxiliaires (TSC) montés en parallèle, un multiplexeur (222) qui reçoit des signaux RF en provenance des TSC sur des ports d'entrée (290, 292, 294), et un coupleur directif (DC). Chaque TSC (210, 212, 214, 216, 218, 220) est conçu pour prendre en charge des communications dans une bande de fréquences respective. Le multiplexeur sert à acheminer les signaux depuis les ports d'entrée jusqu'à un port de sortie commun (296) et à réduire la distorsion harmonique provoquée par les TSC. Le DC (226) possède un port d'entrée (1) connecté au port de sortie commun, un port d'émission (4) connecté à un port d'antenne, et un port de couplage (3) qui assure le couplage d'une partie du signal RF à une boucle de réaction commune (CFL). Ladite CFL (270) produit un signal de réaction couplé à chaque TSC. Chaque TSC répond au signal de réaction de manière à conserver une puissance de sortie régulée sur le port d'antenne dans une plage de fréquences.

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