Fast settling, wide dynamic range vector modulator

H - Electricity – 03 – C

Patent

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Details

H03C 5/00 (2006.01) H03F 1/32 (2006.01) H03H 7/20 (2006.01) H04B 1/12 (2006.01)

Patent

CA 2045330

A fast settling, wide dynamic range vector modulator for use in an interference cancellation system or the like includes a quadrature hybrid which receives an RF signal and divides the signal into a primary in-phase component signal and a primary quadrature phase component signal. A first 180° hybrid receives the primary in-phase component signal and provides first and second secondary in-phase component signals which are 180° out of phase with each other. A second 180° hybrid receives the primary quadrature phase component signal and provides first and second secondary quadrature phase component signals which are 180° out of phase with each other. A first switching device selects one of the first and second secondary in-phase component signals, and a second switching device selects one of the first and second secondary quadrature phase component signals. First and second coarse attenuators respectively provide a selectable amount of attenuation to the selected in-phase and quadrature phase component signals. First and second fine attenuators provide fine attenuation to the coarse attenuated in-phase and quadrature phase component signals. A signal combiner combines the fine attenuated in-phase and quadrature phase component signals to provide the corresponding output signal.

Modulateur vectoriel à stabilisation rapide et à dynamique étendue utilisé dans un système éliminateur d'interférence ou un système similaire, comprenant un dispositif hybride à quadrature qui reçoit un signal RF et le divise en un signal composant primaire en phase et en un signal composant primaire en quadrature. Un premier dispositif hybride à 180 degrés capte le signal composant primaire en phase et fournit les premier et deuxième signaux composants secondaires en phase, entre lesquels il y a une différence de phase de 180 degrés. Un second dispositif hybride à 180 degrés capte le signal composant primaire en quadrature et fournit les premier et deuxième signaux composants secondaires en quadrature, entre lesquels il y a une différence de phase de 180 degrés. Un premier dispositif de commutation sélectionne l'un des premiers et deuxièmes signaux composants secondaires en phase, et un second dispositif de commutation sélectionne l'un des premiers et deuxièmes signaux composants secondaires en quadrature. Un premier et un second atténuateurs grossiers fournissent respectivement une atténuation réglable des signaux composants en phase et en quadrature sélectionnés. Un premier et un second atténuateurs fins fournissent une atténuation fine des signaux composants en phase et en quadrature ayant fait l'objet de l'atténuation grossière. Un combineur de signaux combine les signaux composants en phase et en quadrature ayant fait l'objet de l'atténuation fine pour produire le signal de sortie correspondant.

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