SIST EN 60862-2:2012

SLOVENSKI STANDARD
SIST EN 60862-2:2012
01-oktober-2012
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SIST EN 60862-2:2003
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Surface acoustic wave (SAW) filters of assessed quality - Part 2: Guide to the use
Oberflächenwellenfilter (OFW-Filter) mit bewerteter Qualität - Teil 2: Leitfaden für die
Anwendung
Filtres à ondes acoustiques de surface (OAS) sous assurance de la qualité - Partie 2:
Guide d'utilisation
Ta slovenski standard je istoveten z: EN 60862-2:2012
ICS:
31.160 (OHNWULþQLILOWUL Electric filters
SIST EN 60862-2:2012 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60862-2:2012

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SIST EN 60862-2:2012

EUROPEAN STANDARD
EN 60862-2

NORME EUROPÉENNE
August 2012
EUROPÄISCHE NORM

ICS 31.140 Supersedes EN 60862-2:2002


English version


Surface acoustic wave (SAW) filters of assessed quality -
Part 2: Guidelines for the use
(IEC 60862-2:2012)


Filtres à ondes acoustiques de surface Oberflächenwellenfilter (OFW-Filter)
(OAS) sous assurance de la qualité - mit bewerteter Qualität -
Partie 2: lignes directrices d'utilisation Teil 2: Leitfaden für die Anwendung
(CEI 60862-2:2012) (IEC 60862-2:2012)





This European Standard was approved by CENELEC on 2012-06-11. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60862-2:2012 E

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SIST EN 60862-2:2012
EN 60862-2:2012 - 2 -
Foreword
The text of document 49/933/CDV, future edition 3 of IEC 60862-2, prepared by IEC/TC 49
"Piezoelectric, dielectric and electrostatic devices and associated materials for frequency control,
selection and detection" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 60862-2:2012.
The following dates are fixed:
(dop) 2013-03-11
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2015-06-11
standards conflicting with the
document have to be withdrawn

This document supersedes EN 60862-2:2002.

EN 60862-2:2012 includes the following significant technical changes with respect to
EN 60862-2:2002:
- Clause 3 “Terms and definitions” has been deleted to be included in the next edition of
EN 60862-1;
- the tapered IDT filter and the RSPUDT filter have been added to the clause of SAW transversal
filters. Also DART, DWSF and EWC have been added as variations of SPUDT;
- the balanced connection has been added to the subclause of coupled resonator filters;
- recent substrate materials have been described;
- a subclause about packaging of SAW filters has been added.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 60862-2:2012 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60862 Series NOTE Harmonised as EN 60862 Series (not modified).
IEC 60862-1:2003 NOTE Harmonised as EN 60862-1:2003 (not modified).
IEC 61019-2:2005 NOTE Harmonised as EN 61019-2:2005 (not modified).

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SIST EN 60862-2:2012




IEC 60862-2

®


Edition 3.0 2012-05




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Surface acoustic wave (SAW) filters of assessed quality –

Part 2: Guidelines for the use




Filtres à ondes acoustiques de surface (OAS) sous assurance de la qualité –

Partie 2: Lignes directrices d’utilisation
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX XB


ICS 31.140 ISBN 978-2-88912-074-1



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60862-2:2012
– 2 – 60862-2 © IEC:2012
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Technical considerations . 8
4 Fundamentals of SAW transversal filters . 9
4.1 Frequency response characteristics . 9
4.2 Weighting methods . 10
4.3 Filter configurations and their general characteristics . 13
4.3.1 General . 13
4.3.2 Bidirectional IDT filters . 14
4.3.3 Unidirectional IDT (UDT) filters . 15
4.3.4 Tapered IDT filters . 22
4.3.5 Reflector filters . 23
4.3.6 RSPUDT filters . 27
5 Fundamentals of SAW resonator filters . 30
5.1 Classification of SAW resonator filters . 30
5.2 Ladder and lattice filters . 30
5.2.1 Basic structure . 30
5.2.2 Principle of operation . 31
5.2.3 Characteristics of ladder and lattice filters . 32
5.3 Coupled resonator filters . 35
5.3.1 General . 35
5.3.2 Transversely coupled type . 36
5.3.3 Longitudinally coupled type . 36
5.3.4 Other characteristics of coupled resonator filters . 36
5.3.5 Balanced connection . 41
5.4 Interdigitated interdigital transducer (lIDT) resonator filters . 45
5.4.1 Configuration . 45
5.4.2 Principle . 45
5.4.3 Characteristics . 45
6 Application guidelines . 46
6.1 Substrate materials and their characteristics . 46
6.2 Application to electronics circuits. 50
6.3 Availability and limitations . 52
6.4 Input levels . 53
6.5 Packaging of SAW filters . 54
7 Practical remarks. 56
7.1 General . 56
7.2 Feed-through signals . 56
7.3 Impedance matching condition . 57
7.4 Miscellaneous . 57
7.4.1 Soldering conditions . 57
7.4.2 Static electricity . 57
8 Ordering procedure . 58

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SIST EN 60862-2:2012
60862-2 © IEC:2012 – 3 –
Bibliography . 61

Figure 1 – Frequency response of a SAW filter . 10
Figure 2 – Applicable range of frequency and relative bandwidth of the SAW filter and
the other filters . 11
Figure 3 – Schematic diagram showing signal flow through a transversal filter . 11
Figure 4 – Basic configuration of a SAW transversal filter . 12
Figure 5 – Frequency response of the SAW transversal filter shown in Figure 4, where
f is the centre frequency and N is the number of finger pairs of the IDT . 12
0
Figure 6 – Apodization weighting obtained by apodizing fingers . 13
Figure 7 – Withdrawal weighting obtained by selective withdrawal of the fingers . 13
Figure 8 – Series weighting obtained by the dog-leg structure . 13
Figure 9 – Split-finger configuration . 14
Figure 10 – Typical characteristics of a SAW IF filter for radio transmission equipment
(nominal frequency of 70,0 MHz) . 17
Figure 11 – Typical characteristics of a frequency asymmetrical SAW filter (nominal
frequency of 58,75 MHz for TV-IF use) . 17
Figure 12 – SAW three-IDT filter . 18
Figure 13 – Typical frequency response of a 900 MHz range SAW filter for
communication (mobile telephone use) . 18
Figure 14 – Schematic of the IIDT (multi-IDT) filter . 19
Figure 15 – Multi-phase unidirectional transducer . 19
Figure 16 – Single-phase unidirectional transducers . 20
Figure 17 – Frequency characteristics of a filter using multi-phase unidirectional
transducers . 21
Figure 18 – Frequency characteristics of a filter using single-phase unidirectional
transducers . 21
Figure 19 – Tapered IDT filter . 22
Figure 20 – Frequency response of a 140 MHz tapered IDT filter . 22
Figure 21 – Various reflector filter configurations . 24
Figure 22 – Z-path filter configuration . 25
Figure 23 – Dual-track reflector filter configuration . 25
Figure 24 – SPUDT-based dual-track filter . 26
Figure 25 – Frequency characteristics of Z-path filter . 26
Figure 26 – Frequency characteristics of dual-track reflector filter. 27
Figure 27 – Frequency characteristics of SPUDT-based reflector filter . 27
Figure 28 – A part of DART electrode in RSPUDT filter . 28
Figure 29 – Distribution of internal reflection and detection inside RSPUDT filter . 28
Figure 30 – Frequency and time responses of a 456 MHz RSPUDT filter . 29
Figure 31 – Structure of ladder and lattice filters . 32
Figure 32 – Equivalent circuit of basic section of ladder and lattice filter . 33
Figure 33 – Pattern layout of ladder filter . 33
Figure 34 – Basic concept of ladder and lattice filter . 34
Figure 35 – Typical characteristics of a 1,5 GHz range ladder filter . 35

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SIST EN 60862-2:2012
– 4 – 60862-2 © IEC:2012
Figure 36 – SAW energy distribution and equivalent circuit of transversely coupled
resonator filter . 37
Figure 37 – Typical characteristics of a transversely coupled resonator filter . 38
Figure 38 – Basic configuration and SAW energy distribution of longitudinally coupled
resonator filter . 39
Figure 39 – Typical characteristics of a longitudinally coupled resonator filter . 40
Figure 40 – Configuration of balanced type transversely coupled resonator filter . 41
Figure 41 – Frequency characteristics of balanced type transversely coupled resonator
filter . 42
Figure 42 – Configuration of balanced type longitudinally coupled resonator filter . 43
Figure 43 – Typical characteristics of a balanced type longitudinally coupled resonator
filter . 45
Figure 44 – Schematic of IIDT resonator filter . 46
Figure 45 – Frequency characteristics of a 820 MHz range IIDT resonator filter . 46
Figure 46 – Minimum theoretical conversion losses for various substrates . 48
Figure 47 – Relationship between relative bandwidth and insertion attenuation for
various SAW filters, with the practical SAW filters’ bandwidth for their typical
applications . 52
Figure 48 – Ripples in the characteristics of a SAW filter caused by TTE or feed-
through signal: δf = 1/(2t) for the TTE, and δf = 1/t for the feed-through, where t is the
delay of the SAW main signal . 53
Figure 49 – Example of SAW metal package . 54
Figure 50 – Example of SAW ceramic package . 55
Figure 51 – Example of SAW resin package . 55
Figure 52 – Example of SAW CSP . 56

Table 1 – Properties of typical single-crystal substrate materials . 50
Table 2 – Properties of typical thin-film substrate materials . 50
Table 3 – Properties of typical ceramic substrate materials . 50

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SIST EN 60862-2:2012
60862-2 © IEC:2012 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

SURFACE ACOUSTIC WAVE (SAW) FILTERS
OF ASSESSED QUALITY –

Part 2: Guidelines for the use


FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60862-2 has been prepared by IEC technical committee 49:
Piezoelectric, dielectric and electrostatic devices and associated materials for frequency
control, selection and detection.
This third edition cancels and replaces the second edition published in 2002 and constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
• Clause 3-"Terms and definitions" has been deleted to be included in the next edition of
IEC 60862-1;
• the tapered IDT filter and the RSPUDT filter have been added to the clause of SAW
transversal filters. Also DART, DWSF and EWC have been added as variations of SPUDT;
• the balanced connection has been added to the subclause of coupled resonator filters;

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SIST EN 60862-2:2012
– 6 – 60862-2 © IEC:2012
• recent substrate materials have been described;
• a subclause about packaging of SAW filters has been added.
The text of this standard is based on the following documents:
CDV Report on voting
49/933/CDV 49/970A/RVC

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 60862 series, published under the general title Surface acoustic
wave (SAW) filters of assessed quality, can be found on the IEC web site.
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.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.

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SIST EN 60862-2:2012
60862-2 © IEC:2012 – 7 –
INTRODUCTION
This standard has been compiled in response to a generally expressed desire on the part of
both users and manufacturers for guidance on the use of SAW filters, so that the filters may
be used to their best advantage. To this end, general and fundamental characteristics have
been explained here.
The features of these SAW filters are their small size, light weight, adjustment-free, high
stability and high reliability. SAW filters add new features and applications to the field of
crystal filters and ceramic filters. At the beginning, SAW filters meant transversal filters which
have two interdigital transducers (IDT). Although SAW transversal filters have a relatively
higher minimum insertion attenuation, they have excellent amplitude and phase
characteristics. Extensive studies have been made to reduce minimum insertion attenuation,
such as resonator filter configurations, unidirectional interdigital transducers (UDT),
interdigitated interdigital transducers (IIDT). Nowadays, various kinds of SAW filters with low
insertion attenuation are widely used in various applications and SAW filters are available in
the gigahertz range.

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SIST EN 60862-2:2012
– 8 – 60862-2 © IEC:2012
SURFACE ACOUSTIC WAVE (SAW) FILTERS
OF ASSESSED QUALITY –

Part 2: Guidelines for the use



1 Scope
This part of IEC 60862 gives practical guidance on the use of SAW filters which are used in
telecommunications, measuring equipment, radar systems and consumer products.
IEC 60862-1 should be referred to for general information, standard values and test
conditions.
SAW filters are now widely used in a variety of applications such as TV, satellite
communications, optical fibre communications, mobile communications and so on. While
these SAW filters have various specifications, many of them can be classified within a few
fundamental categories.
This part of IEC 60862 includes various kinds of filter configuration, of which the operating
frequency range is from approximately 10 MHz to 3 GHz and the relative bandwidth is about
0,02 % to 50 % of the centre frequency.
It is not the aim of this standard to explain theory, nor to attempt to cover all the eventualities
which may arise in practical circumstances. This standard draws attention to some of the
more fundamental questions, which should be considered by the user before he places an
order for a SAW filter for a new application. Such a procedure will be the user's insurance
against unsatisfactory performance.
Standard specifications, given in IEC 60862 series, and national specifications or detail
specifications issued by manufacturers, define the available combinations of nominal
frequency, pass bandwidth, ripple, shape factor, terminating impedance, etc. These
specifications are compiled to include a wide range of SAW filters with standardized
performances. It cannot be over-emphasized that the user should, wherever possible, select
his SAW filters from these specifications, when available, even if it may lead to making small
modifications to his circuit to enable standard filters to be used. This applies particularly to
the selection of the nominal frequency.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
None.
3 Technical considerations
It is of prime interest to a user that the filter characteristics should satisfy a particular speci-
fication. The selection of tuning networks and SAW filters to meet that specification should be
a matter of agreement between the user and the manufacturer.

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SIST EN 60862-2:2012
60862-2 © IEC:2012 – 9 –
Filter characteristics are usually expressed in terms of insertion attenuation and group delay
as a function of frequency, as shown in Figure 1. A standard method for measuring insertion
attenuation and group delay is described in 4.5.2 of IEC 60862-1:2003. In some applications,
such characteristics as phase distortion are also important.
Insertion attenuation characteristics are further specified by nominal frequency, minimum
insertion attenuation or maximum insertion attenuation, pass-band ripple
...