SAW devices for consumer communication applications

Abstract

An overview of surface acoustic wave (SAW) filter techniques available for different applications is given. Techniques for TV IF applications are outlined, and typical structures are presented. This is followed by a discussion of applications for SAW resonators. Low-loss devices for mobile communication systems and pager applications are examined. Tapped delay lines (matched filters) and convolvers for code-division multiaccess (CDMA) systems are also covered. Although simulation procedures are not considered, for many devices the theoretical frequency response is presented along with the measurement curve.

Annealing Effect on Structural, Functional, and Device Properties of Flexible ZnO Acoustic Wave Sensors Based on Commercially Available Al Foil

“…On the other hand, surface acoustic wave (SAW) resonators are crucial components for communications [7], micro-sensors [8], microfluidics [9], and lab-on-a-chip applications [10]. SAW devices are usually fabricated on rigid substrates such as silicon, quartz, LiNbO3 [11], and LiTaO3 [12], which are not suitable to fabricate flexible SAW devices.…”

Ultrathin Ferroelectric Films: Growth, Characterization, Physics and Applications

“…Surface acoustic waves (SAWs) are usually used for filters in mobile communication and passive signal processing devices, such as resonators [511], which also have limitation in miniaturization since they are difficult to fabricate on-chip. Conventional SAW devices employ periodic metallic interdigital transducers (IDTs) as electric input and output port, which is usually deposited on uniformly polarized piezoelectric crystals or films, transmitting applied radio frequency (RF) signals to the surface of piezoelectric, which will produce deformation thereby results in the launching and traveling of SAW along the piezoelectric surface.…”

Axial stoichiometry variations in lithium niobate crystals grown from near-congruent melts

“…The largest volume of industrially grown crystals is used for substrates to manufacture surface acoustic wave filters [1], followed by substrates for high-speed modulators in integrated optics [2]. Although the crystal can exist over a wide solid solution range with a lithium oxide molar fraction ranging from roughly 44 to 50%, the majority of crystals are grown by the Czochralski method from melts with composition close to congruency [3].…”