IEC TS 61994-2:2011

IEC/TS 61994-2 ®
Edition 2.0 2011-06
TECHNICAL
SPECIFICATION
SPÉCIFICATION
TECHNIQUE
Piezoelectric, dielectric and electrostatic devices and associated materials for
frequency control, selection and detection – Glossary –
Part 2: Piezoelectric and dielectric filters

Dispositifs piézoélectriques, diélectriques et électrostatiques et matériaux
associés pour la commande, le choix et la détection de la fréquence –
Glossaire –
Partie 2: Filtres piézoélectriques et diélectriques

IEC/TS 61994-2:2011
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IEC/TS 61994-2 ®
Edition 2.0 2011-06
TECHNICAL
SPECIFICATION
SPÉCIFICATION
TECHNIQUE
Piezoelectric, dielectric and electrostatic devices and associated materials for
frequency control, selection and detection – Glossary –
Part 2: Piezoelectric and dielectric filters

Dispositifs piézoélectriques, diélectriques et électrostatiques et matériaux
associés pour la commande, le choix et la détection de la fréquence –
Glossaire –
Partie 2: Filtres piézoélectriques et diélectriques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX R
ICS 31.140; 01.040.31 ISBN 978-2-88912-535-7

– 2 – TS 61994-2  IEC:2011
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5

Figure 1 – Apodized IDT . 6
Figure 2 – Configuration of an interdigital transducer for dispersive filter . 7
Figure 3 – Interdigited interdigital transducer (IIDT) . 9
Figure 4 – Frequency response of Insertion attenuation of a filter . 10
Figure 5 – Configuration of a ladder filter . 10
Figure 6 – Configuration of a lattice filter . 11
Figure 7 – Multiphase transducer (unidirectional transducer) . 12
Figure 8 – Configuration of a resonator filter . 15
Figure 9 – Transversal filter . 18

TS 61994-2  IEC:2011 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PIEZOELECTRIC, DIELECTRIC AND ELECTROSTATIC
DEVICES AND ASSOCIATED MATERIALS
FOR FREQUENCY CONTROL, SELECTION
AND DETECTION – GLOSSARY –
Part 2: Piezoelectric and dielectric filters

FOREWORD
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Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.

– 4 – TS 61994-2  IEC:2011
IEC 61994-2, which is a technical specification, has been prepared by IEC technical
committee 49: Piezoelectric, dielectric and electrostatic devices and associated materials for
frequency control, selection and detection.
This second edition of IEC 61994-2 cancels and replaces the first edition published in 2000
This edition constitutes a technical revision.
The main changes with respect to the previous edition are listed below:
– definitions updated,
– terminology given in orderly sequence,
– new terminologies are added,
– drawings inserted for easier understanding.
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
49/922/DTS 49/931/RVC
Full information on the voting for the approval of this technical specification can be found in
the report on voting indicated in the above table.
This publication has been drafted in accordance with the IS0/lEC Directives, Part 2.
A list of all parts of IEC 61994 series under the general title : Piezoelectric, dielectric and
electrostatic devices and associated materials for frequency control, selection and detection –
Glossary, can be found on the IEC website.
NOTE Future standards in this series will carry the new general title as cited above. Titles of existing standards in
this series will be updated at the time of next edition.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
___________
The general title is changed from Piezoelectric and dielectric devices for frequency control and selection –
Glossary: to this title based on the change of the title of TC49 in 2009.

TS 61994-2  IEC:2011 – 5 –
PIEZOELECTRIC, DIELECTRIC AND ELECTROSTATIC
DEVICES AND ASSOCIATED MATERIALS
FOR FREQUENCY CONTROL, SELECTION
AND DETECTION – GLOSSARY –
Part 2: Piezoelectric and dielectric filters

1 Scope
This part of IEC 61994 is a technical specification that gives the terms and definitions for
piezoelectric and dielectric filters representing the present state of the art, which are intended
for use in the standards and documents of IEC technical committee 49.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applied. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60050(561):1991, International Electrotechnical Vocabulary (IEV) – Chapter 561:
Piezoelectric devices for frequency control and selection
IEC 60368-1:2000, Piezoelectric filters of assessed quality – Part 1: Generic specification
IEC 60368-2-2:1996, Piezoelectric filters – Part 2: Guide to
...