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Norm
OVE EN IEC 62604-2
Ausgabedatum: 2018 10 01
Surface acoustic wave (SAW) and bulk acoustic wave (BAW) duplexers of assessed quality -- Part 2: Guidelines for the use (IEC 62604-2:2017) (english version)
This part of IEC 62604 concerns duplexers which can separate receiving signals from
transmitting signals and are key components for two-way radio communications, and whi...
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Herausgeber:
Österreichischer Verband für Elektrotechnik
Format:
Digital | 34 Seiten
Sprache:
Englisch
ICS
This part of IEC 62604 concerns duplexers which can separate receiving signals from
transmitting signals and are key components for two-way radio communications, and which
are generally used in mobile phone systems compliant with CDMA systems such as N-CDMA
in second generation mobile telecommunication systems (2G), W-CDMA / UMTS (3G) or
LTE (4G). While in 2G systems mainly dielectric duplexers have been used, the ongoing
miniaturization in 3G and 4G mobile communication systems promoted the development and
application of acoustic wave duplexers due to their small size, light weight and good electrical
performance. While standard surface acoustic wave (SAW) duplexers have been employed for
applications with moderate requirements regarding the steepness of individual filters,
applications with narrow duplex gap (e.g. Bands 2, 3, 8, 25), i.e. the frequency gap between
receiving and transmitting bands, require the application of temperature-compensated (TC)
SAW or bulk acoustic wave (BAW) technology, because of their better temperature
characteristics and resonator Q-factors.
It is neither the aim of these guidelines to explain theory, nor to attempt to cover all the
eventualities which may arise in practical circumstances. These guidelines draw attention to
some of the more fundamental questions, which should be considered by the user before he
places an order for SAW and BAW duplexers for a new application. Such a procedure will be
the user’s insurance against unsatisfactory performance. Because SAW and BAW duplexers
have very similar performance for the usage, it is useful and convenient for users that both
duplexers are described in one standard.
Standard specifications, such as those of IEC, of which these guidelines form a part, and
national specifications or detail specifications issued by manufacturers will define the
available combinations of centre frequency, pass bandwidth and insertion attenuation for each
sort of transmitting and receiving filters and the isolation level between transmitter and
receiver ports, etc. These specifications are compiled to include a wide range of SAW and
BAW duplexers with standardized performances. It cannot be over-emphasized that the user
should, wherever possible, select his duplexers from these specifications, when available,
even if it may lead to making small modifications to his circuit to enable the use of standard
duplexers. This applies particularly to the selection of the nominal frequency band.
OVE EN IEC 62604-2
2018 10 01
Surface acoustic wave (SAW) and bulk acoustic wave (BAW) duplexers of assessed quality -- Part 2: G...
Norm
↖
ÖVE/ÖNORM EN 62604-2
2012 10 01
Surface Acoustic Wave (SAW) and Bulk Acoustic Wave (BAW) duplexers of assessed quality - Part 2: Gui...
Norm
ÖVE/ÖNORM EN 62604-2
2012 10 01
Oberflächenwellen-(OFW-) und Volumenwellen-(BAW-)Duplexer mit bewerteter Qualität - Teil 2: Leitfade...
Norm