Title

An Experimental And Theoretical Comparison For The Insertion Loss Of Paired Idts For High Frequency Harmonics

Abstract

Several theoretical models are known to describe the harmonic response of surface acoustic wave (SAW) interdigital transducers (IDTs) of different topologies. The experimental results for insertion loss of IDTs, obtained for several tens of frequency harmonics, are compared with theoretical predictions of the well-known model, based on the "quasi-static approximation". The paired transducer insertion loss of LiTaO3 (Y-1120) and ST-X quartz were measured using a harmonic rich split finger IDT (metallization ratio is 0.6 and electrode thickness is 0.1 um, approximately) over a frequency range from 30 MHz to above 2.4 GHz (LiTaO3) and to above 1.6 GHz (quartz). It is shown that the measured conversion loss of the IDT is in good agreement (about 1.5 dB) with theoretical results up to the 47th harmonic for LiTaO3 and up to the 43rd harmonic for quartz.

Publication Date

12-1-2003

Publication Title

Proceedings of the IEEE Ultrasonics Symposium

Volume

2

Number of Pages

1686-1691

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

4143067278 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/4143067278

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