Patent ID: 6919781

Claim:
A high frequency surface acoustic wave filter that is electrically symmetric, comprising: a piezoelectric substrate; an acoustic track arranged on the piezoelectric substrate, the acoustic track operating using only two reflectors, the acoustic track comprising a four-connector reactance element arranged between the two reflectors, the four-connector reactance element having two interdigital transducers that are adjacent, the interdigital transducers being electrically isolated from one another and arranged in different signal paths, each interdigital transducer having a first bar representing an input connector of the four-connector reactance element and a second bar representing an output connector of the four-connector reactance element, the four-connector reactance element being connected in series with a symmetric port of a symmetric dual mode surface acoustic wave filter, wherein the four-connector reactance element is connected in series with a symmetric port of at least one further symmetric dual mode surface acoustic wave filter.