G - Physics – 01 – S
Patent
G - Physics
01
S
G01S 13/56 (2006.01) G01P 13/00 (2006.01) G01S 7/03 (2006.01) G08B 13/24 (2006.01) H01Q 1/24 (2006.01) H01Q 23/00 (2006.01)
Patent
CA 2225455
A motion detection unit for detecting motion by means of Doppler frequency shift which comprises: a microwave circuit board (1) comprising an oscillator (14), a hybrid coupler circuit element (11) and a mixer (12); an antenna board (2) comprising at least one transmit and receive antenna (4, 5); and a ground plane layer, the two boards (1, 2) being superimposed with the ground plane layer intervening, wherein, in operation, the hybrid coupler circuit element (11) divides power from the oscillator (14), into power for the antenna transmission signal and local oscillator (LO) power to the mixer (12), and directs a received signal from the antenna (4, 5) to the mixer (12), the local oscillator (LO) power and the received signal being combined in the mixer (12) to produce a Doppler signal output.
Une unité de détection de mouvement destinée à détecter un mouvement au moyen d'un déplacement de fréquence Doppler comprend: une carte imprimée hyperfréquence (1) comportant un oscillateur (14), un élément de circuit coupleur hybride (11) et un mélangeur (12), une carte à antenne (2) comportant au moins une antenne d'émission et de réception (4, 5), et une couche de plan de masse, les deux cartes (1, 2) étant superposées à la couche de plan de masse intermédiaire. Lors de son fonctionnement, l'élément de circuit coupleur hybride (11) divise l'alimentation provenant de l'oscillateur (14) en une alimentation destinée au signal de transmission d'antenne et une alimentation de l'oscillateur local (LO) vers le mélangeur (12), et il oriente un signal recu de l'antenne (4, 5) vers le mélangeur (12), l'alimentation provenant de l'oscillateur local (LO) et le signal reçu étant combinés dans le mélangeur (12) afin de produire un signal Doppler en sortie.
Blake Cassels & Graydon Llp
Pyronix Limited
LandOfFree
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