A surface acoustic wave arrangement has at least two interdigital transducers
being
provided on a piezoelectric substrate along an acoustic path, with at least one
of the interdigital transducers being a fan transducer which is divided in a transverse
direction into edge tracks and a center track. The acoustic wave excited in the
edge tracks can be radiated either bidirectionally or unidirectionally in a predominant
direction. On the other hand, the center track is formed so that the unidirectional
radiation of the wave takes place in a direction opposite the predominant direction.
In this manner, the signal transmission is suppressed in the frequency range corresponding
to the finger period in the center track within the passband range of the transfer
function. The obtained notch in the transfer function is used, for example, in
receivers of terrestrial and satellite-based signals for suppressing the terrestrial
signals in the satellite path of the receiver.