Multi-bit phase shifters using mem rf switches

H - Electricity – 01 – P

Patent

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H01P 1/18 (2006.01) H01H 59/00 (2006.01)

Patent

CA 2374131

An RF phase shifter circuit includes first and second RF ports (104, 106), and a switch circuit comprising a plurality of micro-electro-mechanical ("MEM") switches (50A-50D) responsive to control signals. The switch circuit is arranged to select one of a plurality of discrete phase shift values introduced by the phase shifter circuit to RF signals passed between the first and second RF ports. The circuits can be connected to provide a single-pole-multiple- throw (SPMT) or multiple-pole-multiple-throw (MPMT) switch function. The SPMT and MPMT switch circuits can be employed in other applications, including switchable attenuators, switchable filter banks, switchable time delay lines, switch matrices and transmit/receive RF switches.

L'invention concerne un circuit déphaseur HF comprenant un premier et un deuxième accès HF (104, 106), et un circuit commutateur comprenant une pluralité de commutateurs (50A-50D) micro-électro-mécaniques ("MEM") répondant à des signaux de commande. Le circuit de commutation est conçu pour sélectionner une valeur parmi une pluralité de valeurs de changement de phases distinctes introduites par le circuit déphaseur à des signaux HF passés entre le premier et le deuxième accès HF. Les circuits peuvent être connectés afin de fournir une fonction de commutation unipolaire multidirectionnelle (UPMD) ou multipolaire multidirectionnelle (MPMD). Les circuits de commutation UPMD et MPMD peuvent être employés dans d'autres applications, incluant les affaiblisseurs commutables, les bancs de filtres commutables, les lignes de temporisation commutables, les matrices de commutation et les duplexeurs HF.

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