In-building radio-frequency coverage

H - Electricity – 04 – W

Patent

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Details

H04W 88/08 (2009.01) H04B 7/08 (2006.01) H04B 7/26 (2006.01)

Patent

CA 2388760

Repeater apparatus for conveying a radio-frequency (RF) signal into an environment closed-off to the RF signal, including a master transceiver unit having a master port which receives the RF signal, a local oscillator (LO), which generates a LO signal at a LO frequency, and a frequency divider which divides the LO frequency of the LO signal by an integer to produce a divided LO signal. The master transceiver unit also includes a master mixer coupled to the master port and the divider which generates an intermediate--frequency (IF) signal responsive to the RF signal and the LO signal. The apparatus includes one or more slave transceiver units, each unit positioned within the environment closed-off to the RF signal and including a frequency multiplier which generates a recovered LO signal at the LO frequency by multiplying the frequency of the divided LO signal by the integer, a slave mixer coupled to the multiplier which generates a recovered RF signal responsive to the recovered LO signal and the IF signal, and a slave port coupled to the slave mixer which receives the recovered RF signal therefrom and transmits the recovered RF signal into the closed-off environment. The apparatus further includes one or more cables coupled between the master transceiver unit and the one or more slave transceiver units which convey the IF signal and the divided LO signal between the master transceiver unit and the one or more slave transceiver units.

L'invention concerne un appareil de répétition destiné à acheminer un signal radio-fréquence (RF) dans un environnement étanche au signal RF, qui comporte une unité d'émission-réception maîtresse ayant un port maître qui reçoit le signal RF, un oscillateur local (LO) qui génère un signal LO à une fréquence LO, et un diviseur de fréquences qui divise la fréquence LO du signal LO par un nombre entier pour obtenir un signal LO divisé. L'unité d'émission-réception maîtresse comporte aussi un mélangeur maître couplé au port maître et au diviseur, qui génère un signal de fréquence intermédiaire (IF) en réponse au signal RF et au signal LO. L'appareil comprend une ou plusieurs unités d'émission-réception asservies, chaque unité étant placée dans l'environnement étanche au signal RF et comprenant un multiplicateur de fréquences qui génère un signal LO récupéré à la fréquence LO par multiplication de la fréquence du signal LO divisé par le nombre entier, un mélangeur asservi couplé au multiplicateur, qui génère un signal RF récupéré en réponse au signal LO récupéré et au signal IF, et un port asservi couplé au mélangeur asservi, qui reçoit le signal RF récupéré de ce dernier et l'émet dans l'environnement étanche. L'appareil comporte également un ou plusieurs câbles couplés entre l'unité d'émission-réception maîtresse et les unités asservies, câbles qui acheminent le signal IF et le signal LO divisé entre l'unité maîtresse et les unités asservies.

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