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The user segment of wireless communication systems takes profit of the outstanding performance of filtering devices based on acoustic resonators. With a spectrum more and more occupied the design of filters and duplexers for mobile devices is becoming a challenging task. Usually, the design of acoustic wave devices is mainly entrusted to optimization techniques due to the stringent constraints imposed...
The presence of electro-magnetic feedthrough between package ports in the design of filter based on acoustic wave resonators may cause degraded isolation levels and transmission zeros vanishing. These effects come from the presence of complex singularities, but also from internal phase shift requirements for a full network synthesis. This paper proposes a filter design procedure with cross-couplings...
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